} catch (NullPointerException e) {
// This happens in GAE since the sandbox contains no java.home directory
if (LOG.isWarnEnabled())
LOG.warn("Could not exclude JAVA_HOME, is this a sandbox jvm?");
}
urlSet = urlSet.excludePaths(System.getProperty("sun.boot.class.path", ""));
urlSet = urlSet.exclude(".*/JavaVM.framework/.*");
if (includeJars == null) {
urlSet = urlSet.exclude(".*?\\.jar(!/|/)?");
} else {