gentoo-x86/eclass/java-utils-2.eclass

# Base eclass for Java packages
#
# Copyright (c) 2004-2005, Thomas Matthijs <axxo@gentoo.org>
# Copyright (c) 2004, Karl Trygve Kalleberg <karltk@gentoo.org>
# Copyright (c) 2004-2005, Gentoo Foundation
#
# Licensed under the GNU General Public License, v2
#
# $Header: /var/cvsroot/gentoo-x86/eclass/java-utils-2.eclass,v 1.36 2006/12/20 22:45:18 caster Exp $


# -----------------------------------------------------------------------------
# @eclass-begin
# @eclass-shortdesc Java Utility eclass
# @eclass-maintainer java@gentoo.org
#
# This eclass provides functionality which is used by
# java-pkg.eclass and java-pkg-opt.eclass as well as from ebuilds.
#
# @warning
#   You probably don't want to inherit this directly from an ebuild. Instead,
#   you should inherit java-ant for Ant-based Java packages, java-pkg for other
#   Java packages, or java-pkg-opt for packages that have optional Java support.
#
# -----------------------------------------------------------------------------

inherit eutils versionator multilib

IUSE="elibc_FreeBSD"

# -----------------------------------------------------------------------------
# @section-begin variables
# @section-title Variables
#
# Summary of variables which control the behavior of building Java packges.
# -----------------------------------------------------------------------------

# Make sure we use java-config-2
export WANT_JAVA_CONFIG="2"

# TODO document
JAVA_PKG_PORTAGE_DEP=">=sys-apps/portage-2.1_pre1"

# -----------------------------------------------------------------------------
# @variable-internal JAVA_PKG_E_DEPEND
#
# This is a convience variable to be used from the other java eclasses. This is
# the version of java-config we want to use. We also need a recent version
# portage, that includes phase hooks.
# -----------------------------------------------------------------------------
JAVA_PKG_E_DEPEND=">=dev-java/java-config-2.0.19-r1 ${JAVA_PKG_PORTAGE_DEP}"

# -----------------------------------------------------------------------------
# @variable-external JAVA_PKG_ALLOW_VM_CHANGE
# @variable-default yes
#
# Allow this eclass to change the active VM?
# If your system VM isn't sufficient for the package, the build will fail.
# @note This is useful for testing specific VMs.
# -----------------------------------------------------------------------------
JAVA_PKG_ALLOW_VM_CHANGE=${JAVA_PKG_ALLOW_VM_CHANGE:="yes"}

# -----------------------------------------------------------------------------
# @variable-external JAVA_PKG_FORCE_VM
#
# Explicitly set a particular VM to use. If its not valid, it'll fall back to
# whatever /etc/java-config-2/build/jdk.conf would elect to use.
#
# Should only be used for testing and debugging.
#
# @example Use sun-jdk-1.5 to emerge foo
#       JAVA_PKG_FORCE_VM=sun-jdk-1.5 emerge foo
#
# -----------------------------------------------------------------------------

# -----------------------------------------------------------------------------
# @variable-external JAVA_PKG_WANT_SOURCE
#
# Specify a specific VM version to compile for to use for -source.
# Normally this is determined from DEPEND.
# See java-pkg_get-source function below.
#
# Should only be used for testing and debugging.
#
# @seealso java-pkg_get-source
#
# @example Use 1.4 source to emerge baz
#       JAVA_PKG_WANT_SOURCE=1.4 emerge baz
# -----------------------------------------------------------------------------

# -----------------------------------------------------------------------------
# @variable-external JAVA_PKG_WANT_TARGET
#
# Same as JAVA_PKG_WANT_SOURCE above but for -target.
# See java-pkg_get-target function below.
#
# Should only be used for testing and debugging.
#
# @seealso java-pkg_get-target
#
# @example emerge bar to be compatible with 1.3
#       JAVA_PKG_WANT_TARGET=1.3 emerge bar
# -----------------------------------------------------------------------------

# -----------------------------------------------------------------------------
# @variable-internal JAVA_PKG_COMPILER_DIR
# @default /usr/share/java-config-2/compiler
#
# Directory where compiler settings are saved, without trailing slash.
# Probably shouldn't touch this variable.
# -----------------------------------------------------------------------------
JAVA_PKG_COMPILER_DIR=${JAVA_PKG_COMPILER_DIR:="/usr/share/java-config-2/compiler"}


# -----------------------------------------------------------------------------
# @variable-internal JAVA_PKG_COMPILERS_CONF
# @variable-default /etc/java-config-2/build/compilers.conf
#
# Path to file containing information about which compiler to use.
# Can be overloaded, but it should be overloaded for testing.
# -----------------------------------------------------------------------------
JAVA_PKG_COMPILERS_CONF=${JAVA_PKG_COMPILERS_CONF:="/etc/java-config-2/build/compilers.conf"}

# -----------------------------------------------------------------------------
# @variable-external JAVA_PKG_FORCE_COMPILER
#
# Explicitly set a list of compilers to use. This is normally read from
# JAVA_PKG_COMPILERS_CONF.
#
# @note This should only be used internally or for testing.
# @example Use jikes and javac, in that order
#       JAVA_PKG_FORCE_COMPILER="jikes javac"
# -----------------------------------------------------------------------------

# TODO document me
JAVA_PKG_QA_VIOLATIONS=0

# -----------------------------------------------------------------------------
# @section-end variables
# -----------------------------------------------------------------------------


# -----------------------------------------------------------------------------
# @section-begin install
# @section-summary Install functions
#
# These are used to install Java-related things, such as jars, Javadocs, JNI
# libraries, etc.
# -----------------------------------------------------------------------------


# -----------------------------------------------------------------------------
# @ebuild-function java-pkg_dojar
#
# Installs any number of jars.
# Jar's will be installed into /usr/share/${PN}(-${SLOT})/lib/ by default.
# You can use java-pkg_jarinto to change this path.
# You should never install a jar with a package version in the filename.
# Instead, use java-pkg_newjar defined below.
#
# @example
#       java-pkg_dojar dist/${PN}.jar dist/${PN}-core.jar
#
# @param $* - list of jars to install
# ------------------------------------------------------------------------------
java-pkg_dojar() {
        debug-print-function ${FUNCNAME} $*

        [[ ${#} -lt 1 ]] && die "At least one argument needed"

        java-pkg_check-phase install
        java-pkg_init_paths_

        # Create JARDEST if it doesn't exist
        dodir ${JAVA_PKG_JARDEST}

        local jar
        # for each jar
        for jar in "$@"; do
                local jar_basename=$(basename "${jar}")

                java-pkg_check-versioned-jar ${jar_basename}

                # check if it exists
                if [[ -e "${jar}" ]] ; then
                        # install it into JARDEST if it's a non-symlink
                        if [[ ! -L "${jar}" ]] ; then
                                INSDESTTREE="${JAVA_PKG_JARDEST}" \
                                        doins "${jar}" || die "failed to install ${jar}"
                                java-pkg_append_ JAVA_PKG_CLASSPATH "${JAVA_PKG_JARDEST}/${jar_basename}"
                                debug-print "installed ${jar} to ${D}${JAVA_PKG_JARDEST}"
                        # make a symlink to the original jar if it's symlink
                        else
                                # TODO use dosym, once we find something that could use it
                                # -nichoj
                                ln -s "$(readlink "${jar}")" "${D}${JAVA_PKG_JARDEST}/${jar_basename}"
                                debug-print "${jar} is a symlink, linking accordingly"
                        fi
                else
                        die "${jar} does not exist"
                fi
        done

        java-pkg_do_write_
}


# ------------------------------------------------------------------------------
# @internal-function depend-java-query
#
# Wrapper for the depend-java-query binary to enable passing USE in env.
# Using env variables keeps this eclass working with java-config versions that
# do not handle use flags.
# ------------------------------------------------------------------------------

depend-java-query() {
        USE="${USE}" $(which depend-java-query) "${@}"
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_regjar
#
# Records an already installed jar in the package.env
# This would mostly be used if the package has make or a custom script to
# install things.
#
# Example:
#       java-pkg_regjar ${D}/opt/foo/lib/foo.jar
#
# WARNING:
#   if you want to use shell expansion, you have to use ${D}/... as the for in
#   this function will not be able to expand the path, here's an example:
#
#   java-pkg_regjar /opt/my-java/lib/*.jar
#
#   will not work, because:
#    * the `for jar in "$@"` can't expand the path to jar file names, as they
#      don't exist yet
#    * all `if ...` inside for will fail - the file '/opt/my-java/lib/*.jar'
#      doesn't exist
#
#   you have to use it as:
#
#   java-pkg_regjar ${D}/opt/my-java/lib/*.jar
#
# @param $@ - jars to record
# ------------------------------------------------------------------------------
# TODO should we be making sure the jar is present on ${D} or wherever?
java-pkg_regjar() {
        debug-print-function ${FUNCNAME} $*

        java-pkg_check-phase install

        [[ ${#} -lt 1 ]] && die "at least one argument needed"

        java-pkg_init_paths_

        local jar jar_dir jar_file
        for jar in "$@"; do
                # TODO use java-pkg_check-versioned-jar
                if [[ -e "${jar}" ]]; then
                        # nelchael: we should strip ${D} in this case too, here's why:
                        # imagine such call:
                        #    java-pkg_regjar ${D}/opt/java/*.jar
                        # such call will fall into this case (-e ${jar}) and will
                        # record paths with ${D} in package.env
                        java-pkg_append_ JAVA_PKG_CLASSPATH     "${jar#${D}}"
                elif [[ -e "${D}${jar}" ]]; then
                        java-pkg_append_ JAVA_PKG_CLASSPATH     "${jar#${D}}"
                else
                        die "${jar} does not exist"
                fi
        done

        java-pkg_do_write_
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_newjar
#
# Installs a jar with a new name
#
# @example: install a versioned jar without the version
#       java-pkg_newjar dist/${P}.jar ${PN}.jar
#
# @param $1 - jar to install
# @param $2 - new name for jar - defaults to ${PN}.jar if not specified
# ------------------------------------------------------------------------------
java-pkg_newjar() {
        debug-print-function ${FUNCNAME} $*

        local original_jar="${1}"
        local new_jar="${2:-${PN}.jar}"
        local new_jar_dest="${T}/${new_jar}"

        [[ -z ${original_jar} ]] && die "Must specify a jar to install"
        [[ ! -f ${original_jar} ]] && die "${original_jar} does not exist!"

        rm -f "${new_jar_dest}" || die "Failed to remove ${new_jar_dest}"
        cp "${original_jar}" "${new_jar_dest}" \
                || die "Failed to copy ${original_jar} to ${new_jar_dest}"
        java-pkg_dojar "${new_jar_dest}"
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_addcp
#
# Add something to the package's classpath. For jars, you should use dojar,
# newjar, or regjar. This is typically used to add directories to the classpath.
#
# TODO add example
# @param $@ - value to append to JAVA_PKG_CLASSPATH
# ------------------------------------------------------------------------------
java-pkg_addcp() {
        java-pkg_append_ JAVA_PKG_CLASSPATH "${@}"
        java-pkg_do_write_
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_doso
#
# Installs any number of JNI libraries
# They will be installed into /usr/lib by default, but java-pkg_sointo
# can be used change this path
#
# Example:
#       java-pkg_doso *.so
#
# @param $@ - JNI libraries to install
# ------------------------------------------------------------------------------
java-pkg_doso() {
        debug-print-function ${FUNCNAME} $*

        [[ ${#} -lt 1 ]] &&  "At least one argument required for ${FUNCNAME}"
        java-pkg_check-phase install

        [[ ${#} -lt 1 ]] &&  die "At least one argument required for ${FUNCNAME}"

        java-pkg_init_paths_

        local lib
        # for each lib
        for lib in "$@" ; do
                # if the lib exists...
                if [[ -e "${lib}" ]] ; then
                        # install if it isn't a symlink
                        if [[ ! -L "${lib}" ]] ; then
                                INSDESTTREE="${JAVA_PKG_LIBDEST}" \
                                        INSOPTIONS="${LIBOPTIONS}" \
                                        doins "${lib}" || "failed to install ${lib}"
                                java-pkg_append_ JAVA_PKG_LIBRARY "${JAVA_PKG_LIBDEST}"
                                debug-print "Installing ${lib} to ${JAVA_PKG_LIBDEST}"
                        # otherwise make a symlink to the symlink's origin
                        else
                                # TODO use dosym
                                ln -s "$(readlink "${lib}")" "${D}${JAVA_PKG_LIBDEST}/$(basename "${lib}")"
                                debug-print "${lib} is a symlink, linking accordanly"
                        fi
                # otherwise die
                else
                        die "${lib} does not exist"
                fi
        done

        java-pkg_do_write_
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_regso
#
# Registers an already JNI library in package.env.
#
# Example:
#       java-pkg_regso *.so /path/*.so
#
# @param $@ - JNI libraries to register
# ------------------------------------------------------------------------------
java-pkg_regso() {
        debug-print-function ${FUNCNAME} $*

        java-pkg_check-phase install

        [[ ${#} -lt 1 ]] &&  "at least one argument needed"

        java-pkg_init_paths_

        local lib target_dir
        for lib in "$@" ; do
                # Check the absolute path of the lib
                if [[ -e "${lib}" ]] ; then
                        target_dir="$(java-pkg_expand_dir_ ${lib})"
                        java-pkg_append_ JAVA_PKG_LIBRARY "/${target_dir#${D}}"
                # Check the path of the lib relative to ${D}
                elif [[ -e "${D}${lib}" ]]; then
                        target_dir="$(java-pkg_expand_dir_ ${D}${lib})"
                        java-pkg_append_ JAVA_PKG_LIBRARY "${target_dir}"
                else
                        die "${lib} does not exist"
                fi
        done

        java-pkg_do_write_
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_jarinto
#
# Changes the path jars are installed into
#
# @param $1 - new location to install jars into.
# -----------------------------------------------------------------------------
java-pkg_jarinto() {
        debug-print-function ${FUNCNAME} $*

        JAVA_PKG_JARDEST="${1}"
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_sointo
#
# Changes the path that JNI libraries are installed into.
#
# @param $1 - new location to install JNI libraries into.
# ------------------------------------------------------------------------------
java-pkg_sointo() {
        debug-print-function ${FUNCNAME} $*

        JAVA_PKG_LIBDEST="${1}"
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_dohtml
#
# Install Javadoc HTML documentation
#
# @example
#       java-pkg_dohtml dist/docs/
#
# ------------------------------------------------------------------------------
java-pkg_dohtml() {
        debug-print-function ${FUNCNAME} $*

        [[ ${#} -lt 1 ]] &&  die "At least one argument required for ${FUNCNAME}"

        # from /usr/lib/portage/bin/dohtml -h
        #  -f   Set list of allowed extensionless file names.
        dohtml -f package-list "$@"

        # this probably shouldn't be here but it provides
        # a reasonable way to catch # docs for all of the
        # old ebuilds.
        java-pkg_recordjavadoc
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_dojavadoc
#
# Installs javadoc documentation. This should be controlled by the doc use flag.
#
# @param $1: - The javadoc root directory.
#
# @example:
#       java-pkg_dojavadoc docs/api
#
# ------------------------------------------------------------------------------
java-pkg_dojavadoc() {
        local dir="$1"

        java-pkg_check-phase install

        [[ -z "${dir}" ]] && die "Must specify a directory!"
        [[ ! -d "${dir}" ]] && die "${dir} does not exist, or isn't a directory!"

        local dir_to_install="${dir}"
        if [[ "$(basename "${dir}")" != "api" ]]; then
                dir_to_install="${T}/api"
                # TODO use doins
                cp -r "${dir}" "${dir_to_install}" || die "cp failed"
        fi

        java-pkg_dohtml -r ${dir_to_install}
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_dosrc
#
# Installs a zip containing the source for a package, so it can used in
# from IDEs like eclipse and netbeans.
#
# Ebuild needs to DEPEND on app-arch/zip to use this.
#
# It also should be controlled by USE=source.
#
# @example:
#       java-pkg_dosrc src/*
#
# ------------------------------------------------------------------------------
# TODO change so it the arguments it takes are the base directories containing
#       source -nichoj
# TODO should we be able to handle multiple calls to dosrc? -nichoj
# TODO maybe we can take an existing zip/jar? -nichoj
# FIXME apparently this fails if you give it an empty directories
java-pkg_dosrc() {
        debug-print-function ${FUNCNAME} $*

        [ ${#} -lt 1 ] && die "At least one argument needed"
        if ! hasq source ${IUSE}; then
                echo "Java QA Notice: ${FUNCNAME} called without source in IUSE"
        fi

        java-pkg_check-phase install

        [[ ${#} -lt 1 ]] && die "At least one argument needed"

        java-pkg_init_paths_

        local zip_name="${PN}-src.zip"
        local zip_path="${T}/${zip_name}"
        local dir
        for dir in ${@}; do
                local dir_parent=$(dirname "${dir}")
                local dir_name=$(basename "${dir}")
                pushd ${dir_parent} > /dev/null || die "problem entering ${dir_parent}"
                zip -q -r ${zip_path} ${dir_name} -i '*.java'
                local result=$?
                # 12 means zip has nothing to do
                if [[ ${result} != 12 && ${result} != 0 ]]; then
                        die "failed to zip ${dir_name}"
                fi
                popd >/dev/null
        done

        # Install the zip
        INSDESTTREE=${JAVA_PKG_SOURCESPATH} \
                doins ${zip_path} || die "Failed to install source"

        JAVA_SOURCES="${JAVA_PKG_SOURCESPATH}/${zip_name}"
        java-pkg_do_write_
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_dolauncher
#
# Make a wrapper script to lauch/start this package
# If necessary, the wrapper will switch to the appropriate VM.
#
# Can be called without parameters if the package installs only one jar
# that has the Main-class attribute set. The wrapper will be named ${PN}.
#
# @param $1 - filename of launcher to create
# @param $2 - options, as follows:
#  --main the.main.class.too.start
#  --jar /the/jar/too/launch.jar or just <name>.jar
#  --java_args 'Extra arguments to pass to java'
#  --pkg_args 'Extra arguments too pass to the package'
#  --pwd
#  -into
#  -pre
# ------------------------------------------------------------------------------
java-pkg_dolauncher() {
        debug-print-function ${FUNCNAME} $*

        java-pkg_check-phase install
        java-pkg_init_paths_

        if [[ ${#} = 0 ]]; then
                local name="${PN}"
        else
                local name="${1}"
                shift
        fi

        # TODO rename to launcher
        local target="${T}/${name}"
        local var_tmp="${T}/launcher_variables_tmp"
        local target_dir pre

        # Process the other the rest of the arguments
        while [[ -n "${1}" && -n "${2}" ]]; do
                local var=${1} value=${2}
                if [[ "${var:0:2}" == "--" ]]; then
                        local var=${var:2}
                        echo "gjl_${var}=\"${value}\"" >> "${var_tmp}"
                        local gjl_${var}="${value}"
                elif [[ "${var}" == "-into" ]]; then
                        target_dir="${value}"
                elif [[ "${var}" == "-pre" ]]; then
                        pre="${value}"
                fi
                shift 2
        done

        # Test if no --jar and --main arguments were given and
        # in that case check if the package only installs one jar
        # and use that jar.
        if [[ -z "${gjl_jar}" && -z "${gjl_main}" ]]; then
                local cp="${JAVA_PKG_CLASSPATH}"
                if [[ "${cp/:}" = "${cp}" && "${cp%.jar}" != "${cp}" ]]; then
                        echo "gjl_jar=\"${JAVA_PKG_CLASSPATH}\"" >> "${var_tmp}"
                else
                        local msg="Not enough information to create a launcher given."
                        msg="${msg} Please give --jar or --main argument to ${FUNCNAME}."
                        die "${msg}"
                fi
        fi

        # Write the actual script
        echo "#!/bin/bash" > "${target}"
        [[ -n "${pre}" ]] && [[ -f "${pre}" ]] && cat "${pre}" >> "${target}"
        echo "gjl_package=${JAVA_PKG_NAME}" >> "${target}"
        cat "${var_tmp}" >> "${target}"
        rm -f "${var_tmp}"
        echo "source /usr/share/java-config-2/launcher/launcher.bash" >> "${target}"

        if [[ -n "${target_dir}" ]]; then
                DESTTREE="${target_dir}" dobin "${target}"
                local ret=$?
                return ${ret}
        else
                dobin "${target}"
        fi
}

# ------------------------------------------------------------------------------
# Install war files.
# TODO document
# ------------------------------------------------------------------------------
java-pkg_dowar() {
        debug-print-function ${FUNCNAME} $*

        # Check for arguments
        [[ ${#} -lt 1 ]] && die "At least one argument needed"
        java-pkg_check-phase install

        java-pkg_init_paths_

        local war
        for war in $* ; do
                local warpath
                # TODO evaluate if we want to handle symlinks differently -nichoj
                # Check for symlink
                if [[ -L "${war}" ]] ; then
                        cp "${war}" "${T}"
                        warpath="${T}$(basename "${war}")"
                # Check for directory
                # TODO evaluate if we want to handle directories differently -nichoj
                elif [[ -d "${war}" ]] ; then
                        echo "dowar: warning, skipping directory ${war}"
                        continue
                else
                        warpath="${war}"
                fi

                # Install those files like you mean it
                INSOPTIONS="-m 0644" \
                        INSDESTTREE=${JAVA_PKG_WARDEST} \
                        doins ${warpath}
        done
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_recordjavadoc
# Scan for JavaDocs, and record their existence in the package.env file
#
# TODO make sure this in the proper section
# ------------------------------------------------------------------------------
java-pkg_recordjavadoc()
{
        debug-print-function ${FUNCNAME} $*
        # the find statement is important
        # as some packages include multiple trees of javadoc
        JAVADOC_PATH="$(find ${D}/usr/share/doc/ -name allclasses-frame.html -printf '%h:')"
        # remove $D - TODO: check this is ok with all cases of the above
        JAVADOC_PATH="${JAVADOC_PATH//${D}}"
        if [[ -n "${JAVADOC_PATH}" ]] ; then
                debug-print "javadocs found in ${JAVADOC_PATH%:}"
                java-pkg_do_write_
        else
                debug-print "No javadocs found"
        fi
}

# ------------------------------------------------------------------------------
# @section-end install
# ------------------------------------------------------------------------------

# ------------------------------------------------------------------------------
# @begin-section query
# Use these to build the classpath for building a package.
# ------------------------------------------------------------------------------

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_jar-from
#
# Makes a symlink to a jar from a certain package
# A lot of java packages include dependencies in a lib/ directory
# You can use this function to replace these bundled dependencies.
# The dependency is recorded into package.env DEPEND line, unless "--build-only"
# is passed as the very first argument, for jars that have to be present only
# at build time and are not needed on runtime (junit testing etc).
#
# Example: get all jars from xerces slot 2
#       java-pkg_jar-from xerces-2
# Example: get a specific jar from xerces slot 2
#       java-pkg_jar-from xerces-2 xml-apis.jar
# Example: get a specific jar from xerces slot 2, and name it diffrently
#       java-pkg_jar-from xerces-2 xml-apis.jar xml.jar
# Example: get junit.jar which is needed only for building
#       java-pkg_jar-from --build-only junit junit.jar
#
# @param $1 - (optional) "--build-only" makes the jar(s) not added into
#       package.env DEPEND line.
# @param $1 - Package to get jars from.
# @param $2 - jar from package. If not specified, all jars will be used.
# @param $3 - When a single jar is specified, destination filename of the
#       symlink. Defaults to the name of the jar.
# ------------------------------------------------------------------------------
# TODO could probably be cleaned up a little
java-pkg_jar-from() {
        debug-print-function ${FUNCNAME} $*

        local build_only=""

        if [[ "${1}" = "--build-only" ]]; then
                build_only="true"
                shift
        fi

        local target_pkg="${1}" target_jar="${2}" destjar="${3}"

        [[ -z ${target_pkg} ]] && die "Must specify a package"

        # default destjar to the target jar
        [[ -z "${destjar}" ]] && destjar="${target_jar}"

        local error_msg="There was a problem getting the classpath for ${target_pkg}."
        local classpath
        classpath="$(java-config --classpath=${target_pkg})"
        [[ $? != 0 ]] && die ${error_msg}

        local jar
        for jar in ${classpath//:/ }; do
                local jar_name=$(basename "${jar}")
                if [[ ! -f "${jar}" ]] ; then
                        debug-print "${jar} from ${target_pkg} does not exist"
                        die "Installation problems with jars in ${target_pkg} - is it installed?"
                fi
                # If no specific target jar was indicated, link it
                if [[ -z "${target_jar}" ]] ; then
                        [[ -f "${target_jar}" ]]  && rm "${target_jar}"
                        ln -snf "${jar}" \
                                || die "Failed to make symlink from ${jar} to ${jar_name}"
                        [[ -z "${build_only}" ]] && java-pkg_record-jar_ "${target_pkg}" "${jar}"
                # otherwise, if the current jar is the target jar, link it
                elif [[ "${jar_name}" == "${target_jar}" ]] ; then
                        [[ -f "${destjar}" ]]  && rm "${destjar}"
                        ln -snf "${jar}" "${destjar}" \
                                || die "Failed to make symlink from ${jar} to ${destjar}"
                        [[ -z "${build_only}" ]] && java-pkg_record-jar_ "${target_pkg}" "${jar}"
                        return 0
                fi
        done
        # if no target was specified, we're ok
        if [[ -z "${target_jar}" ]] ; then
                return 0
        # otherwise, die bitterly
        else
                die "Failed to find ${target_jar:-jar} in ${target_pkg}"
        fi
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_jarfrom
#
# See java-pkg_jar-from
# ------------------------------------------------------------------------------
java-pkg_jarfrom() {
        java-pkg_jar-from "$@"
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_getjars
#
# Get the classpath provided by any number of packages
# Among other things, this can be passed to 'javac -classpath' or 'ant -lib'.
# The providing packages are recorded as dependencies into package.env DEPEND
# line, unless "--build-only" is passed as the very first argument, for jars
# that have to be present only at build time and are not needed on runtime
# (junit testing etc).
#
# Example: Get the classpath for xerces-2 and xalan,
#       java-pkg_getjars xerces-2,xalan
# Example Return:
#       /usr/share/xerces-2/lib/xml-apis.jar:/usr/share/xerces-2/lib/xmlParserAPIs.jar:/usr/share/xalan/lib/xalan.jar
#
# @param $1 - (optional) "--build-only" makes the jar(s) not added into
#       package.env DEPEND line.
# @param $2 - list of packages to get jars from
#   (passed to java-config --classpath)
# ------------------------------------------------------------------------------
java-pkg_getjars() {
        debug-print-function ${FUNCNAME} $*

        [[ ${#} -lt 1 || ${#} -gt 2 ]] && die "${FUNCNAME} takes only one or two arguments"

        if [[ "${1}" = "--build-only" ]]; then
                local build_only="true"
                shift
        fi

        local classpath pkgs="${1}"
        jars="$(java-config --classpath=${pkgs})"
        [[ -z "${jars}" ]] && die "java-config --classpath=${pkgs} failed"
        debug-print "${pkgs}:${jars}"

        if [[ -z "${classpath}" ]]; then
                classpath="${jars}"
        else
                classpath="${classpath}:${jars}"
        fi

        # Only record jars that aren't build-only
        if [[ -z "${build_only}" ]]; then
                oldifs="${IFS}"
                IFS=","
                for pkg in ${pkgs}; do
                        java-pkg_record-jar_ "${pkg}"
                done
                IFS="${oldifs}"
        fi

        echo "${classpath}"
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_getjar
#
# Get the filename of a single jar from a package
# The providing package is recorded as runtime dependency into package.env
# DEPEND line, unless "--build-only" is passed as the very first argument, for
# jars that have to be present only at build time and are not needed on runtime
# (junit testing etc).
#
# @example
#       java-pkg_getjar xerces-2 xml-apis.jar
# @example-return
#       /usr/share/xerces-2/lib/xml-apis.jar
#
# @param $1 - (optional) "--build-only" makes the jar not added into
#       package.env DEPEND line.
# @param $1 - package to use
# @param $2 - jar to get
# ------------------------------------------------------------------------------
java-pkg_getjar() {
        debug-print-function ${FUNCNAME} $*

        local build_only=""

        if [[ "${1}" = "--build-only" ]]; then
                build_only="true"
                shift
        fi

        local pkg="${1}" target_jar="${2}" jar
        [[ -z ${pkg} ]] && die "Must specify package to get a jar from"
        [[ -z ${target_jar} ]] && die "Must specify jar to get"

        local error_msg="Could not find classpath for ${pkg}. Are you sure its installed?"
        local classpath
        classpath=$(java-config --classpath=${pkg})
        [[ $? != 0 ]] && die ${error_msg}

        for jar in ${classpath//:/ }; do
                if [[ ! -f "${jar}" ]] ; then
                        die "Installation problem with jar ${jar} in ${pkg} - is it installed?"
                fi

                if [[ "$(basename ${jar})" == "${target_jar}" ]] ; then
                        # Only record jars that aren't build-only
                        [[ -z "${build_only}" ]] && java-pkg_record-jar_ "${pkg}" "${jar}"
                        echo "${jar}"
                        return 0
                fi
        done

        die "Could not find ${target_jar} in ${pkg}"
        return 1
}

# This function reads stdin, and based on that input, figures out how to
# populate jars from the filesystem.
# Need to figure out a good way of making use of this, ie be able to use a
# string that was built instead of stdin
# NOTE: this isn't quite ready for primetime.
#java-pkg_populate-jars() {
#       local line
#
#       read line
#       while [[ -n "${line}" ]]; do
#               # Ignore comments
#               [[ ${line%%#*} == "" ]] && continue
#
#               # get rid of any spaces
#               line="${line// /}"
#
#               # format: path=jarinfo
#               local path=${line%%=*}
#               local jarinfo=${line##*=}
#
#               # format: jar@package
#               local jar=${jarinfo%%@*}.jar
#               local package=${jarinfo##*@}
#               if [[ -n ${replace_only} ]]; then
#                       [[ ! -f $path ]] && die "No jar exists at ${path}"
#               fi
#               if [[ -n ${create_parent} ]]; then
#                       local parent=$(dirname ${path})
#                       mkdir -p "${parent}"
#               fi
#               java-pkg_jar-from "${package}" "${jar}" "${path}"
#
#               read line
#       done
#}

# ------------------------------------------------------------------------------
# @section-end query
# ------------------------------------------------------------------------------

# ------------------------------------------------------------------------------
# @section-begin helper
# @section-summary Helper functions
#
# Various other functions to use from an ebuild
# ------------------------------------------------------------------------------

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_need
#
# Adds virtual dependencies, which can optionally be controlled by a USE flag.
# Currently supported virtuals are:
#       javamail
#       jdbc-stdext
#       jaf
#       jdbc-rowset
#       jms
#
# @param $1 - Optionally indicate that the dependencies are controlled by
#                               a use flag by specifying '--use' Requires $2.
# @param $2 - USE flag which will enable the dependencies.
# @param $@ - virtual packages to add depenedencies for
# ------------------------------------------------------------------------------
# TODO rewrite to parse a line based declaration file instead -- karltk
#java-pkg_need() {
#       debug-print-function ${FUNCNAME} $*
#       local useflag
#       if [[ ${1} == "--use" ]]; then
#               useflag="${2}"
#               shift 2
#       fi
#
#       if [[ -z ${1} ]]; then
#               die "Must specify at least one virtual package."
#       fi
#
#       local depstr newdepstr
#
#       for virtual in ${@}; do
#               if has ${virtual} ${JAVA_PKG_VNEED}; then
#                       debug-print "Already registered virtual ${virtual}"
#                       continue
#               fi
#               case ${virtual} in
#                       javamail)
#                               debug-print "java-pkg_need: adding javamail dependencies"
#                               newdepstr="|| ( dev-java/gnu-javamail dev-java/sun-javamail-bin )"
#                               ;;
#                       jdbc-stdext)
#                               debug-print "java-pkg_need: adding jdbc-stdext dependencies"
#                               newdepstr="|| ( >=virtual/jdk-1.4 dev-java/jdbc2-stdext )"
#                               ;;
#                       jaf)
#                               debug-print "java-pkg_need: adding jaf dependencies"
#                               newdepstr="|| ( dev-java/gnu-jaf dev-java/sun-jaf-bin )"
#                               ;;
#                       jdbc-rowset)
#                               debug-print "java-pkg_need: adding jdbc-rowset dependencies"
#                               newdepstr="|| ( >=virtual/jdk-1.5 dev-java/sun-jdbc-rowset )"
#                               ;;
#                       jms)
#                               debug-print "java-pkg_need: adding jms dependencies"
#                               newdepstr="|| ( dev-java/sun-jms dev-java/openjms )"
#                               ;;
#                       *)
#                               die "Invalid virtual: ${virtual}"
#               esac
#
#               export JAVA_PKG_VNEED="${JAVA_PKG_VNEED} ${virtual}"
#
#               if [[ -n ${useflag} ]]; then
#                       depstr="${depstr} ${useflag}? ( ${newdepstr} )"
#               else
#                       depstr="${depstr} ${newdepstr}"
#               fi
#       done
#
#       [[ -z ${JAVA_PKG_NV_DEPEND} ]] && export JAVA_PKG_NV_DEPEND="${DEPEND}"
#       [[ -z ${JAVA_PKG_NV_RDEPEND} ]] && export JAVA_PKG_NV_RDEPEND="${RDEPEND}"
#
#       export DEPEND="${DEPEND} ${depstr}"
#       export RDEPEND="${RDEPEND} ${depstr}"
#}

# This should be used after S has been populated with symlinks to jars
# TODO document
java-pkg_ensure-no-bundled-jars() {
        debug-print-function ${FUNCNAME} $*
        pushd ${WORKDIR} >/dev/null 2>/dev/null

        local bundled_jars=$(find . -name "*.jar" -type f)
        if [[ -n ${bundled_jars} ]]; then
                echo "Bundled jars found:"
                local jar
                for jar in ${bundled_jars}; do
                        echo $(pwd)${jar/./}
                done
                die "Bundled jars found!"

        fi
        popd >/dev/null 2>/dev/null
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_ensure-vm-version-sufficient
#
# Checks if we have a sufficient VM and dies if we don't.
#
# ------------------------------------------------------------------------------
java-pkg_ensure-vm-version-sufficient() {
        debug-print-function ${FUNCNAME} $*

        if ! java-pkg_is-vm-version-sufficient; then
                debug-print "VM is not suffient"
                eerror "Current Java VM cannot build this package"
                einfo "Please use java-config -S to set the correct one"
                die "Active Java VM cannot build this package"
        fi
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_is-vm-version-sufficient
#
# @return zero - VM is sufficient
# @return non-zero - VM is not sufficient
# ------------------------------------------------------------------------------
java-pkg_is-vm-version-sufficient() {
        debug-print-function ${FUNCNAME} $*

        depend-java-query --is-sufficient "${DEPEND}" > /dev/null
        return $?
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_ensure-vm-version-eq
#
# Die if the current VM is not equal to the argument passed.
#
# @param $@ - Desired VM version to ensure
# ------------------------------------------------------------------------------
java-pkg_ensure-vm-version-eq() {
        debug-print-function ${FUNCNAME} $*

        if ! java-pkg_is-vm-version-eq $@ ; then
                debug-print "VM is not suffient"
                eerror "This package requires a Java VM version = $@"
                einfo "Please use java-config -S to set the correct one"
                die "Active Java VM too old"
        fi
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_is-vm-version-eq
#
# @param $@ - VM version to compare current VM to
# @return zero - VM versions are equal
# @return non-zero - VM version are not equal
# ------------------------------------------------------------------------------
java-pkg_is-vm-version-eq() {
        debug-print-function ${FUNCNAME} $*

        local needed_version="$@"

        [[ -z "${needed_version}" ]] && die "need an argument"

        local vm_version="$(java-pkg_get-vm-version)"

        vm_version="$(get_version_component_range 1-2 "${vm_version}")"
        needed_version="$(get_version_component_range 1-2 "${needed_version}")"

        if [[ -z "${vm_version}" ]]; then
                debug-print "Could not get JDK version from DEPEND"
                return 1
        else
                if [[ "${vm_version}" == "${needed_version}" ]]; then
                        debug-print "Detected a JDK(${vm_version}) = ${needed_version}"
                        return 0
                else
                        debug-print "Detected a JDK(${vm_version}) != ${needed_version}"
                        return 1
                fi
        fi
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_ensure-vm-version-ge
#
# Die if the current VM is not greater than the desired version
#
# @param $@ - VM version to compare current to
# ------------------------------------------------------------------------------
java-pkg_ensure-vm-version-ge() {
        debug-print-function ${FUNCNAME} $*

        if ! java-pkg_is-vm-version-ge "$@" ; then
                debug-print "vm is not suffient"
                eerror "This package requires a Java VM version >= $@"
                einfo "Please use java-config -S to set the correct one"
                die "Active Java VM too old"
        fi
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_is-vm-version-ge
#
# @param $@ - VM version to compare current VM to
# @return zero - current VM version is greater than checked version
# @return non-zero - current VM version is not greater than checked version
# ------------------------------------------------------------------------------
java-pkg_is-vm-version-ge() {
        debug-print-function ${FUNCNAME} $*

        local needed_version=$@
        local vm_version=$(java-pkg_get-vm-version)
        if [[ -z "${vm_version}" ]]; then
                debug-print "Could not get JDK version from DEPEND"
                return 1
        else
                if version_is_at_least "${needed_version}" "${vm_version}"; then
                        debug-print "Detected a JDK(${vm_version}) >= ${needed_version}"
                        return 0
                else
                        debug-print "Detected a JDK(${vm_version}) < ${needed_version}"
                        return 1
                fi
        fi
}

java-pkg_set-current-vm() {
        export GENTOO_VM=${1}
}

java-pkg_get-current-vm() {
        echo ${GENTOO_VM}
}

java-pkg_current-vm-matches() {
        hasq $(java-pkg_get-current-vm) ${@}
        return $?
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_get-source
#
# Determines what source version should be used, for passing to -source.
# Unless you want to break things you probably shouldn't set _WANT_SOURCE
#
# @return string - Either the lowest possible source, or JAVA_PKG_WANT_SOURCE
# ------------------------------------------------------------------------------
java-pkg_get-source() {
        echo ${JAVA_PKG_WANT_SOURCE:-$(depend-java-query --get-lowest "${DEPEND} ${RDEPEND}")}
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_get-target
#
# Determines what target version should be used, for passing to -target.
# If you don't care about lower versions, you can set _WANT_TARGET to the
# version of your JDK.
#
# @return string - Either the lowest possible target, or JAVA_PKG_WANT_TARGET
# ------------------------------------------------------------------------------
java-pkg_get-target() {
        echo ${JAVA_PKG_WANT_TARGET:-$(depend-java-query --get-lowest "${DEPEND} ${RDEPEND}")}
}

java-pkg_get-javac() {
        debug-print-function ${FUNCNAME} $*


        local compiler="${GENTOO_COMPILER}"

        local compiler_executable
        if [[ "${compiler}" = "javac" ]]; then
                # nothing fancy needs to be done for javac
                compiler_executable="javac"
        else
                # for everything else, try to determine from an env file

                local compiler_env="/usr/share/java-config-2/compiler/${compiler}"
                if [[ -f ${compiler_env} ]]; then
                        local old_javac=${JAVAC}
                        unset JAVAC
                        # try to get value of JAVAC
                        compiler_executable="$(source ${compiler_env} 1>/dev/null 2>&1; echo ${JAVAC})"
                        export JAVAC=${old_javac}

                        if [[ -z ${compiler_executable} ]]; then
                                echo "JAVAC is empty or undefined in ${compiler_env}"
                                return 1
                        fi

                        # check that it's executable
                        if [[ ! -x ${compiler_executable} ]]; then
                                echo "${compiler_executable} doesn't exist, or isn't executable"
                                return 1
                        fi
                else
                        echo "Could not find environment file for ${compiler}"
                        return 1
                fi
        fi
        echo ${compiler_executable}
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_javac-args
#
# If an ebuild uses javac directly, instead of using ejavac, it should call this
# to know what -source/-target to use.
#
# @return string - arguments to pass to javac, complete with -target and -source
# ------------------------------------------------------------------------------
java-pkg_javac-args() {
        debug-print-function ${FUNCNAME} $*

        local want_source="$(java-pkg_get-source)"
        local want_target="$(java-pkg_get-target)"

        local source_str="-source ${want_source}"
        local target_str="-target ${want_target}"

        debug-print "want source: ${want_source}"
        debug-print "want target: ${want_target}"

        if [[ -z "${want_source}" || -z "${want_target}" ]]; then
                debug-print "could not find valid -source/-target values for javac"
                echo "Could not find valid -source/-target values for javac"
                return 1
        else
                if java-pkg_is-vm-version-ge "1.4"; then
                        echo "${source_str} ${target_str}"
                else
                        echo "${target_str}"
                fi
        fi
}

# TODO document
java-pkg_get-jni-cflags() {
        local flags="-I${JAVA_HOME}/include"

        local platform="linux"
        use elibc_FreeBSD && platform="freebsd"

        # TODO do a check that the directories are valid
        flags="${flags} -I${JAVA_HOME}/include/${platform}"

        echo ${flags}
}

java-pkg_ensure-gcj() {
        if ! built_with_use sys-devel/gcc gcj ; then
                ewarn
                ewarn "You must build gcc with the gcj support to build with gcj"
                ewarn
                ebeep 5
                die "No GCJ support found!"
        fi
}

java-pkg_ensure-test() {
        if hasq test ${FEATURES} && ! hasq -test ${FEATURES} \
                && hasq test ${IUSE} && ! use test;
        then
                eerror "You specified FEATURES=test, but USE=test is needed"
                eerror "to pull in the additional dependencies for testing"
                die "Need USE=test enabled"
        fi
}

# ------------------------------------------------------------------------------
# @section-end helper
# ------------------------------------------------------------------------------

# ------------------------------------------------------------------------------
# @section-begin build
# @section-summary Build functions
#
# These are some functions for building a package. In particular, it consists of
# wrappers for javac and ant.
# ------------------------------------------------------------------------------

# ------------------------------------------------------------------------------
# @ebuild-function eant
#
# Ant wrapper function. Will use the appropriate compiler, based on user-defined
# compiler.
#
# ------------------------------------------------------------------------------
eant() {
        debug-print-function ${FUNCNAME} $*

        # FIXME get this working
#       if is-java-strict && [[ ! ${DEPEND} =~ "dev-java/ant" ]]; then
#               java-pkg_announce-qa-violation \
#                       "Using eant, but not depending on dev-java/ant or dev-java/ant-core"
#       fi

        local antflags="-Dnoget=true"
        java-pkg_init-compiler_
        local compiler="${GENTOO_COMPILER}"

        local compiler_env="${JAVA_PKG_COMPILER_DIR}/${compiler}"

        local build_compiler="$(source ${compiler_env} 1>/dev/null 2>&1; echo ${ANT_BUILD_COMPILER})"
        if [[ "${compiler}" != "javac" && -z "${build_compiler}" ]]; then
                die "ANT_BUILD_COMPILER undefined in ${compiler_env}"
        fi

        if [[ ${compiler} != "javac" ]]; then
                antflags="${antflags} -Dbuild.compiler=${build_compiler}"
                # Figure out any extra stuff to put on the classpath for compilers aside
                # from javac
                # ANT_BUILD_COMPILER_DEPS should be something that could be passed to
                # java-config -p
                local build_compiler_deps="$(source ${JAVA_PKG_COMPILER_DIR}/${compiler} 1>/dev/null 2>&1; echo ${ANT_BUILD_COMPILER_DEPS})"
                if [[ -n ${build_compiler_deps} ]]; then
                        antflags="${antflags} -lib $(java-config -p ${build_compiler_deps})"
                fi
        fi

        if is-java-strict; then
                einfo "Disabling system classpath for ant"
                antflags="${antflags} -Dbuild.sysclasspath=ignore"
        fi

        if [[ -n ${JAVA_PKG_DEBUG} ]]; then
                antflags="${antflags} -debug"
        fi

        [[ -n ${JAVA_PKG_DEBUG} ]] && echo ant ${antflags} "${@}"
        ant ${antflags} "${@}" || die "eant failed"

}

# ------------------------------------------------------------------------------
# @ebuild-function ejavac
#
# Javac wrapper function. Will use the appropriate compiler, based on
# /etc/java-config/compilers.conf
#
# @param $@ - Arguments to be passed to the compiler
# ------------------------------------------------------------------------------
ejavac() {
        debug-print-function ${FUNCNAME} $*

        java-pkg_init-compiler_

        local compiler_executable
        compiler_executable=$(java-pkg_get-javac)
        if [[ ${?} != 0 ]]; then
                eerror "There was a problem determining compiler: ${compiler_executable}"
                die "get-javac failed"
        fi

        local javac_args
        javac_args="$(java-pkg_javac-args)"
        if [[ ${?} != 0 ]]; then
                eerror "There was a problem determining JAVACFLAGS: ${javac_args}"
                die "java-pkg_javac-args failed"
        fi

        [[ -n ${JAVA_PKG_DEBUG} ]] && echo ${compiler_executable} ${javac_args} "${@}"
        ${compiler_executable} ${javac_args} "${@}" || die "ejavac failed"
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_filter-compiler
#
# Used to prevent the use of some compilers. Should be used in src_compile.
# Basically, it just appends onto JAVA_PKG_FILTER_COMPILER
#
# @param $@ - compilers to filter
# ------------------------------------------------------------------------------
java-pkg_filter-compiler() {
        JAVA_PKG_FILTER_COMPILER="${JAVA_PKG_FILTER_COMPILER} $@"
}

# ------------------------------------------------------------------------------
# @ebuild-function java-pkg_force-compiler
#
# Used to force the use of particular compilers. Should be used in src_compile.
# A common use of this would be to force ecj-3.1 to be used on amd64, to avoid
# OutOfMemoryErrors that may come up.
#
# @param $@ - compilers to force
# ------------------------------------------------------------------------------
java-pkg_force-compiler() {
        JAVA_PKG_FORCE_COMPILER="$@"
}

# ------------------------------------------------------------------------------
# @ebuild-function use_doc
#
# Helper function for getting ant to build javadocs. If the user has USE=doc,
# then 'javadoc' or the argument are returned. Otherwise, there is no return.
#
# The output of this should be passed to ant.
#
# Example: build javadocs by calling 'javadoc' target
#       eant $(use_doc)
# Example: build javadocs by calling 'apidoc' target
#       eant $(use_doc apidoc)
#
# @param $@ - Option value to return. Defaults to 'javadoc'
# @return string - Name of the target to create javadocs
# ------------------------------------------------------------------------------
use_doc() {
        use doc && echo ${@:-javadoc}
}

# ------------------------------------------------------------------------------
# @section-end build
# ------------------------------------------------------------------------------

# ------------------------------------------------------------------------------
# @section-begin internal
# @section-summary Internal functions
#
# Do __NOT__ use any of these from an ebuild! These are only to be used from
# within the java eclasses.
# ------------------------------------------------------------------------------

# -----------------------------------------------------------------------------
# @function-internal java-pkg_init
#
# The purpose of this function, as the name might imply, is to initialize the
# Java environment. It ensures that that there aren't any environment variables
# that'll muss things up. It initializes some variables, which are used
# internally. And most importantly, it'll switch the VM if necessary.
#
# This shouldn't be used directly. Instead, java-pkg and java-pkg-opt will
# call it during each of the phases of the merge process.
#
# -----------------------------------------------------------------------------
java-pkg_init() {
        unset JAVAC
        unset JAVA_HOME
        java-pkg_init_paths_
        java-pkg_switch-vm
        PATH=${JAVA_HOME}/bin:${PATH}

        # TODO we will probably want to set JAVAC and JAVACFLAGS

        # Do some QA checks
        java-pkg_check-jikes

        # When users have crazy classpaths some packages can fail to compile.
        # and everything should work with empty CLASSPATH.
        # This also helps prevent unexpected dependencies on random things
        # from the CLASSPATH.
        unset CLASSPATH
}

# ------------------------------------------------------------------------------
# @function-internal java-pkg-init-compiler_
#
# This function attempts to figure out what compiler should be used. It does
# this by reading the file at JAVA_PKG_COMPILERS_CONF, and checking the
# COMPILERS variable defined there.
# This can be overridden by a list in JAVA_PKG_FORCE_COMPILER
#
# It will go through the list of compilers, and verify that it supports the
# target and source that are needed. If it is not suitable, then the next
# compiler is checked. When JAVA_PKG_FORCE_COMPILER is defined, this checking
# isn't done.
#
# Once the which compiler to use has been figured out, it is set to
# GENTOO_COMPILER.
#
# If you hadn't guessed, JAVA_PKG_FORCE_COMPILER is for testing only.
#
# If the user doesn't defined anything in JAVA_PKG_COMPILERS_CONF, or no
# suitable compiler was found there, then the default is to use javac provided
# by the current VM.
#
#
# @return name of the compiler to use
# ------------------------------------------------------------------------------
java-pkg_init-compiler_() {
        debug-print-function ${FUNCNAME} $*

        if [[ -n ${GENTOO_COMPILER} ]]; then
                debug-print "GENTOO_COMPILER already set"
                return
        fi

        local compilers;
        if [[ -z ${JAVA_PKG_FORCE_COMPILER} ]]; then
                compilers="$(source ${JAVA_PKG_COMPILERS_CONF} 1>/dev/null 2>&1; echo   ${COMPILERS})"
        else
                compilers=${JAVA_PKG_FORCE_COMPILER}
        fi

        debug-print "Read \"${compilers}\" from ${JAVA_PKG_COMPILERS_CONF}"

        # Figure out if we should announce what compiler we're using
        local compiler
        for compiler in ${compilers}; do
                debug-print "Checking ${compiler}..."
                # javac should always be alright
                if [[ ${compiler} = "javac" ]]; then
                        debug-print "Found javac... breaking"
                        export GENTOO_COMPILER="javac"
                        break
                fi

                if has ${compiler} ${JAVA_PKG_FILTER_COMPILER}; then
                        if [[ -z ${JAVA_PKG_FORCE_COMPILER} ]]; then
                                einfo "Filtering ${compiler}"
                                continue
                        fi
                fi

                # for non-javac, we need to make sure it supports the right target and
                # source
                local compiler_env="${JAVA_PKG_COMPILER_DIR}/${compiler}"
                if [[ -f ${compiler_env} ]]; then
                        local desired_target="$(java-pkg_get-target)"
                        local desired_source="$(java-pkg_get-source)"


                        # Verify that the compiler supports target
                        local supported_target=$(source ${compiler_env} 1>/dev/null 2>&1; echo ${SUPPORTED_TARGET})
                        if ! has ${desired_target} ${supported_target}; then
                                ewarn "${compiler} does not support -target ${desired_target},  skipping"
                                continue
                        fi

                        # -source was introduced in 1.3, so only check 1.3 and on
                        if version_is_at_least "${desired_soure}" "1.3"; then
                                # Verify that the compiler supports source
                                local supported_source=$(source ${compiler_env} 1>/dev/null 2>&1; echo ${SUPPORTED_SOURCE})
                                if ! has ${desired_source} ${supported_source}; then
                                        ewarn "${compiler} does not support -source ${desired_source}, skipping"
                                        continue
                                fi
                        fi

                        # if you get here, then the compiler should be good to go
                        export GENTOO_COMPILER="${compiler}"
                        break
                else
                        ewarn "Could not find configuration for ${compiler}, skipping"
                        ewarn "Perhaps it is not installed?"
                        continue
                fi
        done

        # If it hasn't been defined already, default to javac
        if [[ -z ${GENTOO_COMPILER} ]]; then
                if [[ -n ${compilers} ]]; then
                        einfo "No suitable compiler found: defaulting javac for compilation"
                else
                        # probably don't need to notify users about the default.
                        :;#einfo "Defaulting to javac for compilation"
                fi
                export GENTOO_COMPILER=javac
        else
                einfo "Using ${GENTOO_COMPILER} for compilation"
        fi

}

# ------------------------------------------------------------------------------
# @internal-function init_paths_
#
# Initializes some variables that will be used. These variables are mostly used
# to determine where things will eventually get installed.
# ------------------------------------------------------------------------------
java-pkg_init_paths_() {
        debug-print-function ${FUNCNAME} $*

        local pkg_name
        if [[ "$SLOT" == "0" ]] ; then
                JAVA_PKG_NAME="${PN}"
        else
                JAVA_PKG_NAME="${PN}-${SLOT}"
        fi

        JAVA_PKG_SHAREPATH="${DESTTREE}/share/${JAVA_PKG_NAME}"
        JAVA_PKG_SOURCESPATH="${JAVA_PKG_SHAREPATH}/sources/"
        JAVA_PKG_ENV="${D}${JAVA_PKG_SHAREPATH}/package.env"

        [[ -z "${JAVA_PKG_JARDEST}" ]] && JAVA_PKG_JARDEST="${JAVA_PKG_SHAREPATH}/lib"
        [[ -z "${JAVA_PKG_LIBDEST}" ]] && JAVA_PKG_LIBDEST="${DESTTREE}/$(get_libdir)/${JAVA_PKG_NAME}"
        [[ -z "${JAVA_PKG_WARDEST}" ]] && JAVA_PKG_WARDEST="${JAVA_PKG_SHAREPATH}/webapps"


        # TODO maybe only print once?
        debug-print "JAVA_PKG_SHAREPATH: ${JAVA_PKG_SHAREPATH}"
        debug-print "JAVA_PKG_ENV: ${JAVA_PKG_ENV}"
        debug-print "JAVA_PKG_JARDEST: ${JAVA_PKG_JARDEST}"
        debug-print "JAVA_PKG_LIBDEST: ${JAVA_PKG_LIBDEST}"
        debug-print "JAVA_PKG_WARDEST: ${JAVA_PKG_WARDEST}"
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_do_write_
#
# Writes the package.env out to disk.
#
# ------------------------------------------------------------------------------
# TODO change to do-write, to match everything else
java-pkg_do_write_() {
        java-pkg_init_paths_
        # Create directory for package.env
        dodir "${JAVA_PKG_SHAREPATH}"
        if [[ -n "${JAVA_PKG_CLASSPATH}" || -n "${JAVA_PKG_LIBRARY}" || -f "${JAVA_PKG_DEPEND}" ]]; then
                # Create package.env
                (
                        echo "DESCRIPTION=\"${DESCRIPTION}\""
                        echo "GENERATION=\"2\""

                        [[ -n "${JAVA_PKG_CLASSPATH}" ]] && echo "CLASSPATH=\"${JAVA_PKG_CLASSPATH}\""
                        [[ -n "${JAVA_PKG_LIBRARY}" ]] && echo "LIBRARY_PATH=\"${JAVA_PKG_LIBRARY}\""
                        [[ -n "${JAVA_PROVIDE}" ]] && echo "PROVIDES=\"${JAVA_PROVIDE}\""
                        [[ -f "${JAVA_PKG_DEPEND}" ]] && echo "DEPEND=\"$(cat ${JAVA_PKG_DEPEND} | uniq | tr '\n' ':')\""
                        echo "VM=\"$(echo ${RDEPEND} ${DEPEND} | sed -e 's/ /\n/g' | sed -n -e '/virtual\/\(jre\|jdk\)/ { p;q }')\"" # TODO cleanup !
                ) > "${JAVA_PKG_ENV}"

                # register target/source
                local target="$(java-pkg_get-target)"
                local source="$(java-pkg_get-source)"
                [[ -n ${target} ]] && echo "TARGET=\"${target}\"" >> "${JAVA_PKG_ENV}"
                [[ -n ${source} ]] && echo "SOURCE=\"${source}\"" >> "${JAVA_PKG_ENV}"

                # register javadoc info
                [[ -n ${JAVADOC_PATH} ]] && echo "JAVADOC_PATH=\"${JAVADOC_PATH}\"" \
                        >> ${JAVA_PKG_ENV}
                # register source archives
                [[ -n ${JAVA_SOURCES} ]] && echo "JAVA_SOURCES=\"${JAVA_SOURCES}\"" \
                        >> ${JAVA_PKG_ENV}


                echo "MERGE_VM=\"${GENTOO_VM}\"" >> "${JAVA_PKG_ENV}"
                [[ -n ${GENTOO_COMPILER} ]] && echo "MERGE_COMPILER=\"${GENTOO_COMPILER}\"" >> "${JAVA_PKG_ENV}"

                # Strip unnecessary leading and trailing colons
                # TODO try to cleanup if possible
                sed -e "s/=\":/=\"/" -e "s/:\"$/\"/" -i "${JAVA_PKG_ENV}" || die "Did you forget to call java_init ?"
        fi
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_record-jar_
#
# Record a dependency to the package.env
#
# ------------------------------------------------------------------------------
JAVA_PKG_DEPEND="${T}/java-pkg-depend"

java-pkg_record-jar_() {
        debug-print-function ${FUNCNAME} $*

        local pkg=${1} jar=${2} append
        if [[ -z "${jar}" ]]; then
                append="${pkg}"
        else
                append="$(basename ${jar})@${pkg}"
        fi

        echo ${append} >> ${JAVA_PKG_DEPEND}
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_append_
#
# Appends a value to a variable
#
# Example: java-pkg_append_ CLASSPATH foo.jar
# @param $1 variable name to modify
# @param $2 value to append
# ------------------------------------------------------------------------------
java-pkg_append_() {
        debug-print-function ${FUNCNAME} $*

        local var="${1}" value="${2}"
        if [[ -z "${!var}" ]] ; then
                export ${var}="${value}"
        else
                local oldIFS=${IFS} cur haveit
                IFS=':'
                for cur in ${!var}; do
                        if [[ ${cur} == ${value} ]]; then
                                haveit="yes"
                                break
                        fi
                done
                [[ -z ${haveit} ]] && export ${var}="${!var}:${value}"
                IFS=${oldIFS}
        fi
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_expand_dir_
#
# Gets the full path of the file/directory's parent.
# @param $1 - file/directory to find parent directory for
# @return - path to $1's parent directory
# ------------------------------------------------------------------------------
java-pkg_expand_dir_() {
        pushd "$(dirname "${1}")" >/dev/null 2>&1
        pwd
        popd >/dev/null 2>&1
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_func-exists
#
# Does the indicated function exist?
#
# @return 0 - function is declared
# @return 1 - function is undeclared
# ------------------------------------------------------------------------------
java-pkg_func-exists() {
        if [[ -n "$(declare -f ${1})" ]]; then
                return 0
        else
                return 1
        fi
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_setup-vm
#
# Sets up the environment for a specific VM
#
# ------------------------------------------------------------------------------
java-pkg_setup-vm() {
        debug-print-function ${FUNCNAME} $*

        local vendor="$(java-pkg_get-vm-vendor)"
        if [[ "${vendor}" == "sun" ]] && java-pkg_is-vm-version-ge "1.5" ; then
                addpredict "/dev/random"
        elif [[ "${vendor}" == "ibm" ]]; then
                addpredict "/proc/self/maps"
                addpredict "/proc/cpuinfo"
                export LANG="C" LC_ALL="C"
        elif [[ "${vendor}" == "jrockit" ]]; then
                addpredict "/proc/cpuinfo"
        fi
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_needs-vm
#
# Does the current package depend on virtual/jdk?
#
# @return 0 - Package depends on virtual/jdk
# @return 1 - Package does not depend on virtual/jdk
# ------------------------------------------------------------------------------
java-pkg_needs-vm() {
        debug-print-function ${FUNCNAME} $*

        if [[ -n "$(echo ${DEPEND} | sed -e '\:virtual/jdk:!d')" ]]; then
                return 0
        fi

        return 1
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_get-current-vm
#
# @return - The current VM being used
# ------------------------------------------------------------------------------
java-pkg_get-current-vm() {
        java-config -f
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_get-vm-vendor
#
# @return - The vendor of the current VM
# ------------------------------------------------------------------------------
java-pkg_get-vm-vendor() {
        debug-print-function ${FUNCNAME} $*

        local vm="$(java-pkg_get-current-vm)"
        vm="${vm/-*/}"
        echo "${vm}"
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_get-vm-version
#
# @return - The version of the current VM
# ------------------------------------------------------------------------------
java-pkg_get-vm-version() {
        debug-print-function ${FUNCNAME} $*

        java-config -g PROVIDES_VERSION
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_switch-vm
#
# Switch VM if we're allowed to (controlled by JAVA_PKG_ALLOW_VM_CHANGE), and
# verify that the current VM is sufficient.
# Setup the environment for the VM being used.
# ------------------------------------------------------------------------------
java-pkg_switch-vm() {
        if java-pkg_needs-vm; then
                # Use the VM specified by JAVA_PKG_FORCE_VM
                if [[ -n ${JAVA_PKG_FORCE_VM} ]]; then
                        # If you're forcing the VM, I hope you know what your doing...
                        export GENTOO_VM="${JAVA_PKG_FORCE_VM}"
                # if we're allowed to switch the vm...
                elif [[ "${JAVA_PKG_ALLOW_VM_CHANGE}" == "yes" ]]; then
                        debug-print "depend-java-query:  NV_DEPEND:     ${JAVA_PKG_NV_DEPEND:-${DEPEND}} VNEED: ${JAVA_PKG_VNEED}"
                        if [[ -n ${JAVA_PKG_VNEED} ]]; then
                                GENTOO_VM="$(depend-java-query --need-virtual "${JAVA_PKG_VNEED}" --get-vm "${JAVA_PKG_NV_DEPEND:-${DEPEND}}")"
                        else
                                GENTOO_VM="$(depend-java-query --get-vm "${JAVA_PKG_NV_DEPEND:-${DEPEND}}")"
                        fi
                        if [[ -z "${GENTOO_VM}" || "${GENTOO_VM}" == "None" ]]; then
                                eerror "Unable to determine VM for building from dependencies:"
                                echo "NV_DEPEND: ${JAVA_PKG_NV_DEPEND:-${DEPEND}}"
                                echo "VNEED: ${JAVA_PKG_VNEED}"
                                die "Failed to determine VM for building."
                        else
                                export GENTOO_VM
                        fi
                # otherwise just make sure the current VM is sufficient
                else
                        java-pkg_ensure-vm-version-sufficient
                fi
                debug-print "Using: $(java-config -f)"

                java-pkg_setup-vm

                export JAVA=$(java-config --java)
                export JAVAC=$(java-config --javac)
                JAVACFLAGS="$(java-pkg_javac-args)"
                if [[ ${?} != 0 ]]; then
                        eerror "There was a problem determining JAVACFLAGS: ${JAVACFLAGS}"
                        die "java-pkg_javac-args failed"
                fi
                [[ -n ${JAVACFLAGS_EXTRA} ]] && JAVACFLAGS="${JAVACFLAGS_EXTRA} ${JAVACFLAGS}"
                export JAVACFLAGS

                export JAVA_HOME="$(java-config -g JAVA_HOME)"
                export JDK_HOME=${JAVA_HOME}

                #TODO If you know a better solution let us know.
                java-pkg_append_ LD_LIBRARY_PATH "$(java-config -g LDPATH)"

                local tann="${T}/announced-vm"
                if [[ -n "${JAVA_PKG_DEBUG}" ]] || [[ ! -f "${tann}" ]] ; then
                        # Add a check for setup/preinst phase... to avoid duplicate outputs
                        # for when FEATURES=buildpkg
                        if [[ ${EBUILD_PHASE} != "setup" && ${EBUILD_PHASE} != "preinst" && ${EBUILD_PHASE} != "postinst" ]];
                        then
                                einfo "Using: $(java-config -f)"
                                [[ ! -f "${tann}" ]] && touch "${tann}"
                        fi
                fi

        else
                [[ -n "${JAVA_PKG_DEBUG}" ]] && ewarn "!!! This package inherits java-pkg but doesn't depend on a JDK. -bin or broken dependency!!!"
        fi
}

# ------------------------------------------------------------------------------
# @internal-function java-pkg_die
#
# Enhanced die for Java packages, which displays some information that may be
# useful for debugging bugs on bugzilla.
# ------------------------------------------------------------------------------
#register_die_hook java-pkg_die
if ! hasq java-pkg_die ${EBUILD_DEATH_HOOKS}; then
        EBUILD_DEATH_HOOKS="${EBUILD_DEATH_HOOKS} java-pkg_die"
fi

java-pkg_die() {
        echo "!!! When you file a bug report, please include the following information:" >&2
        echo "GENTOO_VM=${GENTOO_VM}  CLASSPATH=\"${CLASSPATH}\" JAVA_HOME=\"${JAVA_HOME}\"" >&2
        echo "JAVACFLAGS=\"${JAVACFLAGS}\" COMPILER=\"${GENTOO_COMPILER}\"" >&2
        echo "and of course, the output of emerge --info" >&2
}


# TODO document
# List jars in the source directory, ${S}
java-pkg_jar-list() {
        if [[ -n "${JAVA_PKG_DEBUG}" ]]; then
                einfo "Linked Jars"
                find "${S}" -type l -name '*.jar' -print0 | xargs -0 -r -n 500 ls -ald | sed -e "s,${WORKDIR},\${WORKDIR},"
                einfo "Jars"
                find "${S}" -type f -name '*.jar' -print0 | xargs -0 -r -n 500 ls -ald | sed -e "s,${WORKDIR},\${WORKDIR},"
                einfo "Classes"
                find "${S}" -type f -name '*.class' -print0 | xargs -0 -r -n 500 ls -ald | sed -e "s,${WORKDIR},\${WORKDIR},"
        fi
}

# TODO document
# Verify that the classes were compiled for the right source / target
java-pkg_verify-classes() {
        ebegin "Verifying java class versions"
        #$(find ${D} -type f -name '*.jar' -o -name '*.class')
        class-version-verify.py -t $(java-pkg_get-target) -r ${D}
        result=$?
        eend ${result}
        if [[ ${result} == 0 ]]; then
                einfo "All good"
        else
                ewarn "Possible problem"
                die "Bad class files found"
        fi
}

# ------------------------------------------------------------------------------
# @section-end internal
# ------------------------------------------------------------------------------

java-pkg_check-phase() {
        local phase=${1}
        local funcname=${2}
        if is-java-strict && [[ ${EBUILD_PHASE} != ${phase} ]]; then
                java-pkg_announce-qa-violation \
                        "${funcname} used outside of src_${phase}"
        fi
}

java-pkg_check-versioned-jar() {
        local jar=${1}

        if [[ ${jar} =~ ${PV} ]]; then
                java-pkg_announce-qa-violation "installing versioned jar '${jar}'"
        fi
}

java-pkg_check-jikes() {
        if hasq jikes ${IUSE}; then
                java-pkg_announce-qa-violation "deprecated USE flag 'jikes' in IUSE"
        fi
}

java-pkg_announce-qa-violation() {
        if is-java-strict; then
                echo "Java QA Notice: $@" >&2
                increment-qa-violations
        fi
}

increment-qa-violations() {
        let "JAVA_PKG_QA_VIOLATIONS+=1"
        export JAVA_PKG_QA_VIOLATIONS
}

is-java-strict() {
        [[ -n ${JAVA_PKG_STRICT} ]]
        return $?
}

# ------------------------------------------------------------------------------
# @eclass-end
# ------------------------------------------------------------------------------