| /* |
| * 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.loaders.java.compiler; |
| |
| import org.apache.myfaces.extensions.scripting.api.*; |
| import org.apache.myfaces.extensions.scripting.api.Compiler; |
| import org.apache.myfaces.extensions.scripting.core.util.ReflectUtil; |
| |
| /** |
| * |
| */ |
| public class JavaCompilerFactory { |
| /** |
| * since the object is stateless |
| * declaring it volatile should be enough instead |
| * of using synchronized blocks |
| * please if you introduce statefulness here |
| * we have to add synchronized |
| */ |
| private static volatile JavaCompilerFactory _instance = new JavaCompilerFactory(); |
| |
| public static JavaCompilerFactory getInstance() { |
| if (_instance == null) { |
| _instance = new JavaCompilerFactory(); |
| } |
| return _instance; |
| } |
| |
| private String getScriptingFacadeClass(boolean allowJSR) { |
| String javaVer = System.getProperty("java.version"); |
| String[] versionArr = javaVer.split("\\."); |
| |
| int major = Integer.parseInt(versionArr[Math.min(versionArr.length, 1)]); |
| |
| if (major > 5 && allowJSR) { |
| //jsr199 compliant jdk |
| return ScriptingConst.JSR199_COMPILER; |
| } |
| //otherwise |
| return ScriptingConst.JAVA5_COMPILER; |
| } |
| |
| public org.apache.myfaces.extensions.scripting.api.Compiler getCompilerInstance() { |
| return (Compiler) ReflectUtil.instantiate(getScriptingFacadeClass(true)); |
| } |
| |
| public org.apache.myfaces.extensions.scripting.api.Compiler getCompilerInstance(boolean allowJSR) { |
| return (Compiler) ReflectUtil.instantiate(getScriptingFacadeClass(allowJSR)); |
| } |
| |
| } |