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Groovy: A powerful, dynamic language for the JVM
/**
* 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.codehaus.groovy.control;
import org.codehaus.groovy.antlr.AntlrParserPluginFactory;
/**
* A factory of parser plugin instances
*
*/
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();
}