| /* |
| * Copyright 2003-2007 the original author or authors. |
| * |
| * Licensed 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.codehaus.groovy.control; |
| |
| import org.codehaus.groovy.antlr.AntlrParserPluginFactory; |
| |
| /** |
| * A factory of parser plugin instances |
| * |
| * @version $Revision$ |
| */ |
| public abstract class ParserPluginFactory { |
| public static ParserPluginFactory newInstance(boolean useNewParser) { |
| if (useNewParser) { |
| Class type = null; |
| String name = "org.codehaus.groovy.antlr.AntlrParserPluginFactory"; |
| try { |
| type = Class.forName(name); |
| } |
| catch (ClassNotFoundException e) { |
| try { |
| type = ParserPluginFactory.class.getClassLoader().loadClass(name); |
| } |
| catch (ClassNotFoundException e1) { |
| ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader(); |
| if (contextClassLoader != null) { |
| try { |
| type = contextClassLoader.loadClass(name); |
| } |
| catch (ClassNotFoundException e2) { |
| // ignore |
| } |
| } |
| } |
| } |
| |
| if (type != null) { |
| try { |
| return (ParserPluginFactory) type.newInstance(); |
| } |
| catch (Exception e) { |
| throw new RuntimeException("Could not create AntlrParserPluginFactory: " + e, e); |
| } |
| } |
| // can't find Antlr parser, so lets use the Classic one |
| } |
| return new AntlrParserPluginFactory(); |
| } |
| |
| public abstract ParserPlugin createParserPlugin(); |
| } |