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Java > Open Source Codes > org > ofbiz > minilang > operation > Regexp


1 /*
2  * $Id: Regexp.java 5462 2005-08-05 18:35:48Z jonesde $
3  *
4  * Copyright (c) 2001, 2002 The Open For Business Project - www.ofbiz.org
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included
14  * in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
20  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
21  * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
22  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23  */
24 package org.ofbiz.minilang.operation;
25
26 import java.util.*;
27
28 import org.apache.oro.text.regex.*;
29 import org.w3c.dom.*;
30
31 import org.ofbiz.base.util.*;
32
33 /**
34  * Validates the current field using a regular expression
35  *
36  * @author <a HREF="mailto:jonesde@ofbiz.org">David E. Jones</a>
37  * @version $Rev: 5462 $
38  * @since 2.0
39  */
40 public class Regexp extends SimpleMapOperation {
41     
42     public static final String JavaDoc module = Regexp.class.getName();
43     
44     static PatternMatcher matcher = new Perl5Matcher();
45     static PatternCompiler compiler = new Perl5Compiler();
46     Pattern pattern = null;
47     String JavaDoc expr;
48
49     public Regexp(Element element, SimpleMapProcess simpleMapProcess) {
50         super(element, simpleMapProcess);
51         expr = element.getAttribute("expr");
52         try {
53             pattern = compiler.compile(expr);
54         } catch (MalformedPatternException e) {
55             Debug.logError(e, module);
56         }
57     }
58
59     public void exec(Map inMap, Map results, List messages, Locale locale, ClassLoader JavaDoc loader) {
60         Object JavaDoc obj = inMap.get(fieldName);
61
62         String JavaDoc fieldValue = null;
63
64         try {
65             fieldValue = (String JavaDoc) ObjectType.simpleTypeConvert(obj, "String", null, locale);
66         } catch (GeneralException e) {
67             messages.add("Could not convert field value for comparison: " + e.getMessage());
68             return;
69         }
70
71         if (pattern == null) {
72             messages.add("Could not compile regular expression \"" + expr + "\" for validation");
73             return;
74         }
75
76         if (!matcher.matches(fieldValue, pattern)) {
77             addMessage(messages, loader, locale);
78         }
79     }
80 }
81
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