| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.myfaces.extensions.scripting.core.engine; |
| |
| import org.apache.myfaces.extensions.scripting.core.common.util.ClassUtils; |
| import org.apache.myfaces.extensions.scripting.core.common.util.ReflectUtil; |
| import org.apache.myfaces.extensions.scripting.core.engine.api.ScriptingEngine; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.logging.Logger; |
| |
| /** |
| * @author Werner Punz (latest modification by $Author$) |
| * @version $Revision$ $Date$ |
| * <p/> |
| * holds references to the scripting engines |
| * initializes the engins dynamically |
| */ |
| public class FactoryEngines |
| { |
| final Logger _log = Logger.getLogger(this.getClass().getName()); |
| /*we have to keep the order of the engines for the class detection*/ |
| Map<Integer, ScriptingEngine> _engines = new LinkedHashMap<Integer, ScriptingEngine>(); |
| |
| public void init() throws IOException |
| { |
| //loadEnginesDynamically(); |
| ScriptingEngine javaEngine = new EngineJava(); |
| ScriptingEngine groovyEngine = null; |
| ScriptingEngine scalaEngine = null; |
| try |
| { |
| ClassUtils.getContextClassLoader().loadClass("groovy.lang.GroovyObject"); |
| groovyEngine = (ScriptingEngine) ReflectUtil.instantiate("org.apache.myfaces.extensions.scripting.core" + |
| ".engine.EngineGroovy"); |
| } |
| catch (Exception ex) |
| { |
| } |
| try |
| { |
| ClassUtils.getContextClassLoader().loadClass("scala.ScalaObject"); |
| scalaEngine = (ScriptingEngine) ReflectUtil.instantiate("org.apache.myfaces.extensions.scripting.core" + |
| ".engine.EngineScala"); |
| } |
| catch (Exception ex) |
| { |
| } |
| |
| if (_engines.isEmpty()) |
| { |
| //We now add the keys as linked hashmap keys |
| //so that java always is last hence the class |
| //detection has to work from top to bottom |
| if (groovyEngine != null) |
| _engines.put(groovyEngine.getEngineType(), groovyEngine); |
| if (scalaEngine != null) |
| _engines.put(scalaEngine.getEngineType(), scalaEngine); |
| |
| _engines.put(javaEngine.getEngineType(), javaEngine); |
| } |
| } |
| |
| |
| |
| public Collection<ScriptingEngine> getEngines() |
| { |
| List<ScriptingEngine> engineList = new ArrayList<ScriptingEngine>(); |
| for(Map.Entry<Integer, ScriptingEngine> entry: _engines.entrySet()) { |
| engineList.add(entry.getValue()); |
| } |
| |
| return engineList; |
| } |
| |
| public ScriptingEngine getEngine(int engineType) |
| { |
| return _engines.get(engineType); |
| } |
| |
| private static FactoryEngines _ourInstance = new FactoryEngines(); |
| |
| public static FactoryEngines getInstance() |
| { |
| return _ourInstance; |
| } |
| |
| private FactoryEngines() |
| { |
| } |
| } |