/**

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  * 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

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  * 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

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

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 package org.netbeans.html.boot.impl;

 import java.io.Closeable;

 import java.io.Reader;

 import java.net.URL;

 import java.net.URLClassLoader;

 import java.util.ArrayList;

 import java.util.Arrays;

 import java.util.Collection;

 import java.util.List;

 import javax.script.Invocable;

 import javax.script.ScriptEngine;

 import javax.script.ScriptEngineManager;

 import javax.script.ScriptException;

 import org.apidesign.html.boot.spi.Fn;

 import org.testng.annotations.BeforeClass;

 import org.testng.annotations.BeforeMethod;

 /**

  *

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

  */

 public class FnTest extends JsClassLoaderBase {

     private static Fn.Presenter presenter;

     public FnTest() {

     }

     @BeforeClass

     public static void createClassLoader() throws Exception {

         ScriptEngineManager sem = new ScriptEngineManager();

         final ScriptEngine eng = sem.getEngineByMimeType("text/javascript");

         final URL my = FnTest.class.getProtectionDomain().getCodeSource().getLocation();

         ClassLoader parent = JsClassLoaderTest.class.getClassLoader().getParent();

         final URLClassLoader ul = new URLClassLoader(new URL[] { my }, parent);

         class Impl implements FindResources, Fn.Presenter {

             @Override

             public void findResources(String path, Collection<? super URL> results, boolean oneIsEnough) {

                 URL u = ul.findResource(path);

                 if (u != null) {

                     results.add(u);

                 }

             }

             @Override

             public Fn defineFn(String code, String... names) {

                 StringBuilder sb = new StringBuilder();

                 sb.append("(function() {");

                 sb.append("return function(");

                 String sep = "";

                 for (String n : names) {

                     sb.append(sep);

                     sb.append(n);

                     sep = ", ";

                 }

                 sb.append(") {");

                 sb.append(code);

                 sb.append("};");

                 sb.append("})()");

                 try {

                     final Object val = eng.eval(sb.toString());

                     return new Fn(this) {

                         @Override

                         public Object invoke(Object thiz, Object... args) throws Exception {

                             List<Object> all = new ArrayList<Object>(args.length + 1);

                             all.add(thiz == null ? val : thiz);

                             all.addAll(Arrays.asList(args));

                             Invocable inv = (Invocable)eng;

                             try {

                                 Object ret = inv.invokeMethod(val, "call", all.toArray());

                                 return val.equals(ret) ? null : ret;

                             } catch (ScriptException ex) {

                                 throw ex;

                             }

                         }

                     };

                 } catch (ScriptException ex) {

                     throw new LinkageError("Can't parse: " + sb, ex);

                 }

             }

             @Override

             public void displayPage(URL resource, Runnable r) {

                 throw new UnsupportedOperationException();

             }

             @Override

             public void loadScript(Reader code) throws Exception {

                 eng.eval(code);

             }

         }

         Impl impl = new Impl();

         ClassLoader loader = FnUtils.newLoader(impl, impl, parent);

         presenter = impl;

         Closeable close = FnContext.activate(impl);

         methodClass = loader.loadClass(JsMethods.class.getName());

         close.close();

     }

     @BeforeMethod public void initPresenter() {

         FnContext.currentPresenter(presenter);

     }

 }