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Java > Open Source Codes > org > enhydra > barracuda > contrib > dbroggisch > display > filters > ConstantFilter


1 /*
2  * Copyright (C) 2003 Diez B. Roggisch [deets@web.de]
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * $Id: ConstantFilter.java,v 1.2 2004/02/01 05:16:27 christianc Exp $
19  */
20 package org.enhydra.barracuda.contrib.dbroggisch.display.filters;
21
22 import java.util.*;
23 import org.enhydra.barracuda.contrib.dbroggisch.display.filters.dtd.*;
24
25 public class ConstantFilter implements Filter {
26
27         private Object JavaDoc constant;
28
29         public ConstantFilter(Object JavaDoc c) {
30                 constant = c;
31         }
32
33         public ConstantFilter() {
34                 this(null);
35         }
36
37         /**
38      *
39      * @param obj will be ignored
40      * @return the Object specified in the constructor
41      */
42         public Object JavaDoc filter(Object JavaDoc obj, FilterContext context)
43                 throws FilterException
44         {
45                 return constant;
46         }
47
48
49         public Filter configure(Object JavaDoc obj)
50                 throws FilterException
51         {
52                 Constant con = (Constant)obj;
53                 constant = con.getValue();
54                 return this;
55         }
56 }
57
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