#
# Helper class for all Java packages
#
# Copyright (c) 2004, Thomas Matthijs <axxo@keanu.be>
# Copyright (c) 2004, Karl Trygve Kalleberg <karltk@gentoo.org>
# Copyright (c) 2004, Gentoo Foundation
#
# Licensed under the GNU General Public License, v2

inherit eutils

ECLASS=java-utils
INHERITED="$INHERITED $ECLASS"
DESCRIPTION="Based on the $ECLASS eclass"

DEPEND=">=java-config-1.2.7"

EXPORT_FUNCTIONS pkg_setup

java-utils_pkg_setup() {
	java-utils_ensure-jdk
}

java-utils_setup-vm() {

	local vendor=`java-utils_get-vm-vendor`
	if [ ${vendor} = "sun-jdk" ] && java-utils_is-vm-version-ge 1 5; then
		addpredict "/dev/random"
	elif [[ ${vendor} = "ibm-jdk-bin" ]]; then
		addwrite "/proc/self/maps"
		addwrite "/proc/cpuinfo"
	elif [[ ${vendor} = "jrockit-jdk-bin" ]]; then
		addwrite "/proc/cpuinfo"
	fi
}

java-utils_ensure-jdk() {
	if ! java-utils_is-vm-jdk; then
		eerror "A full JDK is needed by this package. You currently have no Java VM active or only a JRE"
		eerror "Please use java-config -S to set your system vm to a JDK"
		die "Active VM is not a JDK"
	fi
}

java-utils_is-vm-jdk() {
	if [ "$JDK_HOME" ] && [ "$JDK_HOME" == "$JAVA_HOME" ]; then
		return 0
	else
		return 1
	fi	
}

java-utils_get-vm-vendor() {
	local vm=$(java-config -f)
	echo ${vm%-*}
}

java-utils_get-vm-version() {
	local version=$(java-config -f | sed -r "s/^[a-zA-Z-]+//")
	echo ${version}
}

java-utils_ensure-vm-version-ge() {
	if ! java-utils_is-vm-version-ge $@ ; then
		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
}

java-utils_is-vm-version-ge() {
	local user_major=${1-0}
	local user_minor=${2-0}
	local user_patch=${3-0}
	local user_version=${user_major}.${user_minor}.${user_patch}
	
	local vm_version=`java-utils_get-vm-version`

	local ver_rx="([0-9]+)\.([0-9]+)\.([0-9]+)(.*)"
	local vm_major=$(echo ${vm_version} | sed -r "s/${ver_rx}/\1/")
	local vm_minor=$(echo ${vm_version} | sed -r "s/${ver_rx}/\2/")
	local vm_patch=$(echo ${vm_version} | sed -r "s/${ver_rx}/\3/")
	local vm_extra=$(echo ${vm_version} | sed -r "s/${ver_rx}/\4/")

	if [ ${vm_major} -ge ${user_major} ] && [ ${vm_minor} -gt ${user_minor} ] ; then
		echo "Detected a JDK >= ${user_version}"
		return 0
	elif [ ${vm_major} -ge ${user_major} ] && [ ${vm_minor} -ge ${user_minor} ] && [ ${vm_patch} -ge ${user_patch} ] ; then
		echo "Detected a JDK >= ${user_version}"
		return 0
	else
		echo "Detected a JDK < ${user_version}"
		return 1
	fi
}