private URL[] getResourceRoots(ExternalContext extContext, ClassLoader curLoader)
throws IOException {
URL[] combinedRoots;
Enumeration<URL> classpathResourceEnumeration = curLoader.getResources("META-INF/resources/");
List<URL> classpathResourceList = new ArrayList<URL>();
while (classpathResourceEnumeration.hasMoreElements()) {
classpathResourceList.add(classpathResourceEnumeration.nextElement());
}
// only called during init - safe to cast and save.
URL u = extContext.getResource(SCRIPT_PATH);
URL webappRoots[] = getWebappResourceRoots(extContext),
classpathRoots[] = new URL[classpathResourceList.size()];
classpathResourceList.toArray(classpathRoots);
if (null != u || 0 < webappRoots.length || 0 < classpathRoots.length) {
combinedRoots = new URL[webappRoots.length + classpathRoots.length + (null != u ? 1 : 0)];
System.arraycopy(webappRoots, 0, combinedRoots, 0, webappRoots.length);
System.arraycopy(classpathRoots, 0, combinedRoots, webappRoots.length, classpathRoots.length);
if (null != u) {
combinedRoots[webappRoots.length + classpathRoots.length] = u;
}
} else {
combinedRoots = new URL[0];
}
return combinedRoots;
}
private URL[] getWebappResourceRoots(ExternalContext extContext) {
URL[] result = null;
int size = 0, i = 0;
Set<String> resourceRoots = extContext.getResourcePaths("/resources/");
if (null != resourceRoots && !resourceRoots.isEmpty()) {
// Determine the size of script roots that end with "/"
for (String cur : resourceRoots) {
if (cur.endsWith("/")) {
size++;
}
}
result = new URL[size];
for (String cur : resourceRoots) {
if (cur.endsWith("/")) {
try {
result[i++] = extContext.getResource(cur);
} catch (MalformedURLException ex) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE, null, ex);
}
}
}
}
}
if (null == result) {
result = new URL[0];
}
return result;
}
