class.sh

#! /bin/bash
 
function usage {
    echo 'Find class or resource in jar files and/or directories of jars.'
    echo ''
    echo 'usage: $0 pattern  files... dirs...'
    echo ''
    exit
}
 
function fqcn2path {
    fqcn=$1
    path=`echo $fqcn | sed -e 's@\.@/@g'`
    echo $path
}
 
 
target=/usr/java/jdk/jre/lib/rt.jar
pattern=
quiet=
while getopts e:q c 
do
  case $c in
   'q') quiet=t ; break ;;
   '?') # any other switch
       usage
      ;;
  esac
done
 
shift `expr $OPTIND - 1`
 
if [ $# -eq 0 ] ; then
    usage
fi
 
pattern=`fqcn2path "$1"`
shift 1
 
if [ $# -gt 0 ] ; then
    target=$*
fi
declare cygwin=""
case "`uname -o`" in
  Cygwin*) cygwin=true ;;
  *)  ;;
esac
 
 
function look {
    if [ "$quiet" = "" ] ; then 
        echo $1 . .
    fi
    if [ -n "$cygwin" ] ; then
	p="`cygpath -wa $1`"
    else
	p="$1"
    fi
    if [ -r $1 ] ; then
	if [ "$pattern" == "" ] ; then
	    jar tvf "$p"
	else 
	    jar tvf "$p" | fgrep $pattern
	fi
    else
	echo ERROR: Cannot read $1
    fi
}
 
for t in $target 
  do
  if [ -d $t ] ; then
      for f in `find $t -type f -name "*.jar" -o -name "*.zip"`
        do 
        look $f 
      done
  else
      look $t
  fi
done