1 /*
2 * Copyright 2002-2009 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package net.sf.json.regexp;
18
19 /**
20 * Convenience utility for working withRegexpMatcher.<br>
21 *
22 * @author Andres Almiray <aalmiray@users.sourceforge.net>
23 */
24 public class RegexpUtils {
25 private static String javaVersion = "1.3.1";
26 static{
27 javaVersion = System.getProperty( "java.version" );
28 }
29
30 /**
31 * Returns a RegexpMatcher that works in a specific environment.<br>
32 * When in a JVM 1.3.1 it will return a Perl5RegexpMatcher, if the JVM is
33 * younger (1.4+) it will return a JdkRegexpMatcher.
34 */
35 public static RegexpMatcher getMatcher( String pattern ) {
36 if( isJDK13() ){
37 return new Perl5RegexpMatcher( pattern );
38 }else{
39 return new JdkRegexpMatcher( pattern );
40 }
41 }
42
43 /**
44 * Returns a RegexpMatcher that works in a specific environment.<br>
45 * When in a JVM 1.3.1 it will return a Perl5RegexpMatcher, if the JVM is
46 * younger (1.4+) it will return a JdkRegexpMatcher.
47 */
48 public static RegexpMatcher getMatcher( String pattern, boolean multiline ) {
49 if( isJDK13() ){
50 return new Perl5RegexpMatcher( pattern, true );
51 }else{
52 return new JdkRegexpMatcher( pattern, true );
53 }
54 }
55
56 /**
57 * Queries the environment for the supported JDK version.
58 */
59 public static boolean isJDK13() {
60 return javaVersion.indexOf( "1.3" ) != -1;
61 }
62
63 private RegexpUtils() {
64
65 }
66 }