--- jpackage-utils-1.7.5/java-utils/java-functions	2008-04-01 20:57:42.000000000 +0300
+++ jpackage-utils-1.7.5/java-utils/java-functions	2009-05-04 19:53:21.000000000 +0300
@@ -24,11 +24,26 @@ fi
 [ ! -z "$_JAVA_HOME" -a -d "$_JAVA_HOME" ] && JAVA_HOME="$_JAVA_HOME"
 
 # Test default JRE/JVM roots if nothing is defined yet
-[ -z "$JAVA_HOME" -a -d "$JVM_ROOT/java" ] && JAVA_HOME="$JVM_ROOT/java"
-[ -z "$JAVA_HOME" -a -d "$JVM_ROOT/jre" ] && JAVA_HOME="$JVM_ROOT/jre"
+_set_java_home() {
+  if [ -z "$JAVA_HOME" ] ; then
+    local _java_dirs="java"
+    case "$_prefer_jre" in
+      1|[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]) _java_dirs="jre $_java_dirs" ;;
+      *)                               _java_dirs="$_java_dirs jre" ;;
+    esac
+    for d in $_java_dirs ; do
+      if [ -d "$JVM_ROOT/$d" ] ; then
+        JAVA_HOME="$JVM_ROOT/$d"
+        break
+      fi
+    done
+  fi
+}
 
 # Set the java virtual machine
 set_jvm() {
+  _set_java_home
+
   # use $JAVA_HOME if defined
   if [ -n "$JAVA_HOME" ] ; then
     return
@@ -60,6 +75,8 @@ set_jvm() {
 # Set the classpath
 # This requires a valid JAVA_HOME, JAVACMD, and JAVA_LIBDIR
 set_classpath() {
+  _set_java_home
+
   # get local classpath first
   jars=$@
   if [ -n "$ADDITIONAL_JARS" ] ; then
@@ -130,6 +147,8 @@ run() {
 # Set JVM-related directories
 # Requires a correct $JAVA_LIBDIR, $JAVA_HOME and $JAVA_CMD
 set_jvm_dirs() {
+    _set_java_home
+
     # Jar repository provided by the JVM
     JVM_LIBDIR=$JVM_ROOT-exports/$(echo "$JAVA_HOME" |\
         sed -n "s+$JVM_ROOT/\([-_[:alnum:].]*\)\(.*\)+\1+p")
--- jpackage-utils-1.7.5/misc/macros.jpackage	2008-01-04 13:21:42.000000000 +0200
+++ jpackage-utils-1.7.5/misc/macros.jpackage	2009-05-04 20:00:58.000000000 +0300
@@ -301,6 +301,7 @@ EOF\
 # %3	options
 # %4	jars (separated by ':')
 # %5    the name of script you wish to create
+# %6    whether to prefer a jre over a sdk when finding a jvm
 #
 %jpackage_script() \
 install -d -m 755 $RPM_BUILD_ROOT%{_bindir}\
@@ -311,6 +312,7 @@ cat > $RPM_BUILD_ROOT%{_bindir}/%5 << EO
 # JPackage Project <http://www.jpackage.org/>\
 \
 # Source functions library\
+_prefer_jre="%{?6}"\
 . %{_javadir}-utils/java-functions\
 \
 # Source system prefs\