1 /***
2 *
3 * Copyright 2004 James Strachan
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 **/
18 package org.codehaus.groovy.control;
19
20 import org.codehaus.groovy.antlr.AntlrParserPluginFactory;
21
22 /***
23 * A factory of parser plugin instances
24 *
25 * @version $Revision: 1.8 $
26 */
27 public abstract class ParserPluginFactory {
28 public static ParserPluginFactory newInstance(boolean useNewParser) {
29 if (useNewParser) {
30 Class type = null;
31 String name = "org.codehaus.groovy.antlr.AntlrParserPluginFactory";
32 try {
33 type = Class.forName(name);
34 }
35 catch (ClassNotFoundException e) {
36 try {
37 type = ParserPluginFactory.class.getClassLoader().loadClass(name);
38 }
39 catch (ClassNotFoundException e1) {
40 ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
41 if (contextClassLoader != null) {
42 try {
43 type = contextClassLoader.loadClass(name);
44 }
45 catch (ClassNotFoundException e2) {
46
47 }
48 }
49 }
50 }
51
52 if (type != null) {
53 try {
54 return (ParserPluginFactory) type.newInstance();
55 }
56 catch (Exception e) {
57 throw new RuntimeException("Could not create AntlrParserPluginFactory: " + e, e);
58 }
59 }
60
61 }
62 return new AntlrParserPluginFactory();
63 }
64
65 public abstract ParserPlugin createParserPlugin();
66 }