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Java > Open Source Codes > com > idaremedia > antx > valueuri > condition > ZeroCheckValueURIHandler


1 /**
2  * $Id: ZeroCheckValueURIHandler.java 180 2007-03-15 12:56:38Z ssmc $
3  * Copyright 2005 iDare Media, Inc. All rights reserved.
4  *
5  * Originally written by iDare Media, Inc. for release into the public domain. This
6  * library, source form and binary form, is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public License (LGPL) as published
8  * by the Free Software Foundation; either version 2.1 of the License, or (at your option)
9  * any later version.<p>
10  *
11  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
12  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13  * See the GNU LGPL for more details.<p>
14  *
15  * You should have received a copy of the GNU Lesser General Public License along with this
16  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite
17  * 330, Boston, MA 02111-1307 USA. The GNU LGPL can be found online at
18  * http://www.fsf.org/copyleft/lesser.html<p>
19  *
20  * This product has been influenced by several projects within the open-source community.
21  * The JWare developers wish to acknowledge the open-source community's support. For more
22  * information regarding the open-source products used within JWare, please visit the
23  * JWare website.
24  *----------------------------------------------------------------------------------------*
25  * WEBSITE- http://www.jware.info EMAIL- inquiries@jware.info
26  *----------------------------------------------------------------------------------------*
27  **/
28
29 package com.idaremedia.antx.valueuri.condition;
30
31 import com.idaremedia.antx.apis.Requester;
32 import com.idaremedia.antx.helpers.Tk;
33 import com.idaremedia.antx.starters.ValueURIHandlerSkeleton;
34
35 /**
36  * Value URI handler that returns the true if the incoming source value is "0". Useful
37  * for testing the initial boundary value of a loop cursor when creating compound
38  * strings. An empty fragment returns <span class="src">false</span>.
39  * <p/>
40  * <b>Example Usage:</b><pre>
41  * &lt;foreach i="i" in="0,10" mode="local"&gt;
42  * &lt;do false="${<b>$iszero:</b>@(i)}"&gt;&#8230;
43  *
44  * -- To Install --
45  * &lt;manageuris action="install"&gt;
46  * &lt;parameter name="zero"
47  * value="com.idaremedia.antx.valueuri.condition.ZeroCheckValueURIHandler"/&gt;
48  * &lt;parameter name="iszero"
49  * value="com.idaremedia.antx.valueuri.condition.ZeroCheckValueURIHandler"/&gt;
50  * &lt;/manageuris&gt;
51  * </pre>
52  *
53  * @since JWare/AntX 0.5
54  * @author ssmc, &copy;2005 <a HREF="http://www.jware.info">iDare&nbsp;Media,&nbsp;Inc.</a>
55  * @version 0.5
56  * @.safety multiple
57  * @.group api,helper
58  **/
59
60 public final class ZeroCheckValueURIHandler extends ValueURIHandlerSkeleton
61 {
62     /**
63      * Initializes a new zerocheck value uri handler.
64      **/
65     public ZeroCheckValueURIHandler()
66     {
67         super();
68     }
69
70
71     /**
72      * Returns <span class="src">true</span> iff the incoming fragment
73      * resolves to the value "0".
74      **/
75     public String JavaDoc valueFrom(String JavaDoc uriFragment, String JavaDoc fullUri, Requester clnt)
76     {
77         String JavaDoc value = Tk.resolveString(clnt.getProject(),uriFragment,true);
78         return String.valueOf("0".equals(value));
79     }
80 }
81
82 /* end-of-ZeroCheckValueURIHandler.java */
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