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Java > Open Source Codes > org > mmbase > util > transformers > Swallower


1 /*
2
3 This software is OSI Certified Open Source Software.
4 OSI Certified is a certification mark of the Open Source Initiative.
5
6 The license (Mozilla version 1.0) can be read at the MMBase site.
7 See http://www.MMBase.org/license
8
9 */

10 package org.mmbase.util.transformers;
11
12 import java.io.Reader JavaDoc;
13 import java.io.Writer JavaDoc;
14
15
16 /**
17  * This tranformer is the equivalent of piping to /dev/null
18  *
19  * @author Michiel Meeuwissen
20  * @since MMBase-1.7
21  * @version $Id: Swallower.java,v 1.1 2003/05/11 10:12:56 michiel Exp $
22  */

23
24 public class Swallower extends ReaderTransformer implements CharTransformer {
25
26     // implementation, javadoc inherited
27
public Writer JavaDoc transform(Reader JavaDoc r, Writer JavaDoc w) {
28         return w;
29     }
30
31     // implementation, javadoc inherited
32
public Writer JavaDoc transformBack(Reader JavaDoc r, Writer JavaDoc w) {
33         throw new UnsupportedOperationException JavaDoc("This is utterly impossible :-)");
34     }
35
36     // overridden for performance.
37
public String JavaDoc transform(String JavaDoc s) {
38         return "";
39     }
40     public String JavaDoc toString() {
41         return "SWALLOW";
42     }
43
44 }
45
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