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Java > Open Source Codes > org > apache > tapestry > util > io > BooleanAdaptor


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.util.io;
16
17 import org.apache.tapestry.services.DataSqueezer;
18
19 /**
20  * Squeezes a {@link Boolean}.
21  *
22  * @author Howard Lewis Ship
23  */
24
25 class BooleanAdaptor implements ISqueezeAdaptor
26 {
27     private static final String JavaDoc PREFIX = "TF";
28
29     /**
30      * Registers using the prefixes 'T' and 'F' (for TRUE and FALSE).
31      */
32
33     public void register(DataSqueezer squeezer)
34     {
35         squeezer.register(PREFIX, Boolean JavaDoc.class, this);
36     }
37
38     /**
39      * Squeezes the {@link Boolean}data to either 'T' or 'F'.
40      */
41
42     public String JavaDoc squeeze(DataSqueezer squeezer, Object JavaDoc data)
43     {
44         Boolean JavaDoc bool = (Boolean JavaDoc) data;
45
46         return bool.booleanValue() ? "T" : "F";
47     }
48
49     /**
50      * Unsqueezes the string to either {@link Boolean#TRUE}or {@link Boolean#FALSE}, depending on
51      * the prefix character.
52      */
53
54     public Object JavaDoc unsqueeze(DataSqueezer squeezer, String JavaDoc string)
55     {
56         char ch = string.charAt(0);
57
58         if (ch == 'T')
59             return Boolean.TRUE;
60
61         return Boolean.FALSE;
62     }
63
64 }
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