package org.mozilla.javascript.commonjs.module.provider;
import java.net.URI;
import java.util.LinkedList;
import java.util.List;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.commonjs.module.ModuleScript;
import org.mozilla.javascript.commonjs.module.ModuleScriptProvider;
/**
* A multiplexer for module script providers.
* @author Attila Szegedi
* @version $Id$
*/
public class MultiModuleScriptProvider implements ModuleScriptProvider
{
private final ModuleScriptProvider[] providers;
/**
* Creates a new multiplexing module script provider tht gathers the
* specified providers
* @param providers the providers to multiplex.
*/
public MultiModuleScriptProvider(Iterable<? extends ModuleScriptProvider> providers) {
final List<ModuleScriptProvider> l = new LinkedList<ModuleScriptProvider>();
for (ModuleScriptProvider provider : providers) {
l.add(provider);
}
this.providers = l.toArray(new ModuleScriptProvider[l.size()]);
}
public ModuleScript getModuleScript(Context cx, String moduleId, URI uri,
Scriptable paths) throws Exception {
for (ModuleScriptProvider provider : providers) {
final ModuleScript script = provider.getModuleScript(cx, moduleId,
uri, paths);
if(script != null) {
return script;
}
}
return null;
}
}