#!/bin/bash

usage() {
	echo "Usage:"
	echo "    $(basename $0) <application-name> [-h|-v] ..."
	echo ""
	echo "application-name: valid options are: $(valid_app_options)"
	echo "-h print this help"
	echo "-v display PMD's version"
}

valid_app_options () {
	echo "pmd, cpd, cpdgui, designer, bgastviewer"
}

java_heapsize_settings() {
	local heapsize=${HEAPSIZE:-512m}
	case "${heapsize}" in
		[1-9]*[mgMG])
			readonly HEAPSIZE="-Xmx${heapsize}"
			;;
		'')
			;;
		*)
			echo "HEAPSIZE '${HEAPSIZE}' unknown (try: 512m)"
			exit 1
			;;
	esac
}

readonly APPNAME="${1}"
if [ -z "${APPNAME}" ]; then
	usage
	exit 1
fi
shift

case "${APPNAME}" in
  "pmd")
		readonly CLASSNAME="net.sourceforge.pmd.PMD"
		;;
  "cpd")
		readonly CLASSNAME="net.sourceforge.pmd.cpd.CPD"
		;;
  "designer")
		readonly CLASSNAME="net.sourceforge.pmd.util.designer.Designer"
		;;
  "bgastviewer")
		readonly CLASSNAME="net.sourceforge.pmd.util.viewer.Viewer"
		;;
  "cpdgui")
		readonly CLASSNAME="net.sourceforge.pmd.cpd.GUI"
		;;
  *)
		echo "${APPNAME} is NOT a valid application name, valid options are:$(valid_app_options)"
		;;
esac

java_heapsize_settings

$JAVA_HOME/bin/java "${HEAPSIZE}" -Djava.ext.dirs='/usr/share/java/pmd' "${CLASSNAME}" "${@}"