/**

  * 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 org.netbeans.html.boot.spi.Fn;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.Reader;

 import java.net.URL;

 import java.util.Enumeration;

 /** 

  *

  * @author Jaroslav Tulach

  */

 abstract class JsClassLoader extends ClassLoader {

     JsClassLoader(ClassLoader parent) {

         super(parent);

         setDefaultAssertionStatus(JsClassLoader.class.desiredAssertionStatus());

     }

     @Override

     protected abstract URL findResource(String name);

     @Override

     protected abstract Enumeration<URL> findResources(String name);

     @Override

     protected Class<?> findClass(String name) throws ClassNotFoundException {

         if (name.startsWith("javafx")) {

             return Class.forName(name);

         }

         if (name.startsWith("netscape")) {

             return Class.forName(name);

         }

         if (name.startsWith("com.sun")) {

             return Class.forName(name);

         }

         if (name.startsWith("org.netbeans.html.context.spi")) {

             return Class.forName(name);

         }

         if (name.startsWith("net.java.html.BrwsrCtx")) {

             return Class.forName(name);

         }

         if (name.equals(JsClassLoader.class.getName())) {

             return JsClassLoader.class;

         }

         if (name.equals(Fn.class.getName())) {

             return Fn.class;

         }

         if (name.equals(Fn.Presenter.class.getName())) {

             return Fn.Presenter.class;

         }

         if (name.equals(Fn.ToJavaScript.class.getName())) {

             return Fn.ToJavaScript.class;

         }

         if (name.equals(Fn.FromJavaScript.class.getName())) {

             return Fn.FromJavaScript.class;

         }

         if (name.equals(FnUtils.class.getName())) {

             return FnUtils.class;

         }

         if (

             name.equals("org.netbeans.html.boot.spi.Fn") ||

             name.equals("org.netbeans.html.boot.impl.FnUtils") ||

             name.equals("org.netbeans.html.boot.impl.FnContext")

         ) {

             return Class.forName(name);

         }

         URL u = findResource(name.replace('.', '/') + ".class");

         if (u != null) {

             InputStream is = null;

             try {

                 is = u.openStream();

                 byte[] arr = new byte[is.available()];

                 int len = 0;

                 while (len < arr.length) {

                     int read = is.read(arr, len, arr.length - len);

                     if (read == -1) {

                         throw new IOException("Can't read " + u);

                     }

                     len += read;

                 }

                 is.close();

                 is = null;

                 if (JsPkgCache.process(this, name)) {

                     arr = FnUtils.transform(arr, JsClassLoader.this);

                 }

                 return defineClass(name, arr, 0, arr.length);

             } catch (IOException ex) {

                 throw new ClassNotFoundException("Can't load " + name, ex);

             } finally {

                 try {

                     if (is != null) is.close();

                 } catch (IOException ex) {

                     throw new ClassNotFoundException(null, ex);

                 }

             }

         }

         return super.findClass(name);

     }

     protected abstract Fn defineFn(String code, String... names);

     protected abstract void loadScript(Reader code) throws Exception;

 }