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Java > Open Source Codes > org > dom4j > samples > sax > TrimXMLFilter


1 /*
2  * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
3  *
4  * This software is open source.
5  * See the bottom of this file for the licence.
6  *
7  * $Id: TrimXMLFilter.java,v 1.4 2005/01/29 14:53:14 maartenc Exp $
8  */
9
10 package org.dom4j.samples.sax;
11
12 import org.xml.sax.SAXException JavaDoc;
13 import org.xml.sax.helpers.XMLFilterImpl JavaDoc;
14
15 /**
16  * An example XMLFilter which trims all text content, removing whitespace
17  *
18  * @author <a HREF="mailto:jstrachan@apache.org">James Strachan </a>
19  * @version $Revision: 1.4 $
20  */
21 public class TrimXMLFilter extends XMLFilterImpl JavaDoc {
22
23     public TrimXMLFilter() {
24     }
25
26     public void characters(char[] ch, int start, int length)
27             throws SAXException JavaDoc {
28         int last = start + length;
29         while (start < last && Character.isWhitespace(ch[start])) {
30             start++;
31             length--;
32         }
33         while (length > 0 && Character.isWhitespace(ch[start + length - 1])) {
34             length--;
35         }
36         if (length > 0) {
37             super.characters(ch, start, length);
38         }
39     }
40
41     public void ignorableWhitespace(char[] ch, int start, int length)
42             throws SAXException JavaDoc {
43     }
44 }
45
46 /*
47  * Redistribution and use of this software and associated documentation
48  * ("Software"), with or without modification, are permitted provided that the
49  * following conditions are met:
50  *
51  * 1. Redistributions of source code must retain copyright statements and
52  * notices. Redistributions must also contain a copy of this document.
53  *
54  * 2. Redistributions in binary form must reproduce the above copyright notice,
55  * this list of conditions and the following disclaimer in the documentation
56  * and/or other materials provided with the distribution.
57  *
58  * 3. The name "DOM4J" must not be used to endorse or promote products derived
59  * from this Software without prior written permission of MetaStuff, Ltd. For
60  * written permission, please contact dom4j-info@metastuff.com.
61  *
62  * 4. Products derived from this Software may not be called "DOM4J" nor may
63  * "DOM4J" appear in their names without prior written permission of MetaStuff,
64  * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
65  *
66  * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
67  *
68  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
69  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
70  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
71  * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
72  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
73  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
74  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
75  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
76  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
77  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
78  * POSSIBILITY OF SUCH DAMAGE.
79  *
80  * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
81  *
82  * $Id: TrimXMLFilter.java,v 1.4 2005/01/29 14:53:14 maartenc Exp $
83  */
84
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