/**

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

  *

  * Copyright 2013-2014 Oracle and/or its affiliates. All rights reserved.

  *

  * Oracle and Java are registered trademarks of Oracle and/or its affiliates.

  * Other names may be trademarks of their respective owners.

  *

  * The contents of this file are subject to the terms of either the GNU

  * General Public License Version 2 only ("GPL") or the Common

  * Development and Distribution License("CDDL") (collectively, the

  * "License"). You may not use this file except in compliance with the

  * License. You can obtain a copy of the License at

  * http://www.netbeans.org/cddl-gplv2.html

  * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

  * specific language governing permissions and limitations under the

  * License.  When distributing the software, include this License Header

  * Notice in each file and include the License file at

  * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the GPL Version 2 section of the License file that

  * accompanied this code. If applicable, add the following below the

  * License Header, with the fields enclosed by brackets [] replaced by

  * your own identifying information:

  * "Portions Copyrighted [year] [name of copyright owner]"

  *

  * Contributor(s):

  *

  * The Original Software is NetBeans. The Initial Developer of the Original

  * Software is Oracle. Portions Copyright 2013-2014 Oracle. All Rights Reserved.

  *

  * If you wish your version of this file to be governed by only the CDDL

  * or only the GPL Version 2, indicate your decision by adding

  * "[Contributor] elects to include this software in this distribution

  * under the [CDDL or GPL Version 2] license." If you do not indicate a

  * single choice of license, a recipient has the option to distribute

  * your version of this file under either the CDDL, the GPL Version 2 or

  * to extend the choice of license to its licensees as provided above.

  * However, if you add GPL Version 2 code and therefore, elected the GPL

  * Version 2 license, then the option applies only if the new code is

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 package org.netbeans.html.boot.impl;

 import java.io.BufferedReader;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.InputStreamReader;

 import java.net.URL;

 import java.util.Collections;

 import java.util.Enumeration;

 import java.util.Map;

 import java.util.Set;

 import java.util.TreeSet;

 import java.util.WeakHashMap;

 import java.util.logging.Level;

 import java.util.logging.Logger;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 final class JsPkgCache {

     private final Map<String,Set<String>> props = new WeakHashMap<String, Set<String>>();

     private static final Map<ClassLoader, JsPkgCache> CACHE = new WeakHashMap<ClassLoader, JsPkgCache>();

     private static final Set<String> NONE = Collections.emptySet();

     public static boolean process(ClassLoader l, String className) {

         if (className.equals("org.netbeans.html.boot.impl.Test")) { // NOI18N

             return true;

         }

         Set<String> p;

         JsPkgCache c;

         String pkgName;

         synchronized (CACHE) {

             c = CACHE.get(l);

             if (c == null) {

                 c = new JsPkgCache();

                 CACHE.put(l, c);

             }

             int lastDot = className.lastIndexOf('.');

             pkgName = className.substring(0, lastDot + 1).replace('.', '/');

             p = c.props.get(pkgName);

             if (p == NONE) {

                 return false;

             } else if (p != null) {

                 return p.contains(className);

             }

         }

         final String res = pkgName + "net.java.html.js.classes";

         Enumeration<URL> en;

         try {

             en = l.getResources(res);

         } catch (IOException ex) {

             en = null;

         }

         if (en == null || !en.hasMoreElements()) synchronized (CACHE) {

             c.props.put(pkgName, NONE);

             return false;

         }

         try {

             Set<String> arr = new TreeSet<String>();

             while (en.hasMoreElements()) {

                 URL u = en.nextElement();

                 BufferedReader r = new BufferedReader(

                     new InputStreamReader(u.openStream(), "UTF-8")

                 );

                 for (;;) {

                     String line = r.readLine();

                     if (line == null) {

                         break;

                     }

                     arr.add(line);

                 }

                 r.close();

             }

             p = arr;

         } catch (IOException ex) {

             LOG.log(Level.WARNING, "Can't read " + res, ex);

             p = NONE;

         }

         synchronized (CACHE) {

             c.props.put(pkgName, p);

             return p.contains(className);

         }

     }

     private static final Logger LOG = Logger.getLogger(JsPkgCache.class.getName());

 }