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Java > Open Source Codes > org > apache > tapestry > script > BodyToken


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.script;
16
17 import org.apache.hivemind.Location;
18
19
20 /**
21  * Generates a String from its child tokens, then applies it
22  * to {@link ScriptSessionImpl#setBody(String)}.
23  *
24  * @author Howard Lewis Ship
25  * @since 0.2.9
26  *
27  **/
28
29 class BodyToken extends AbstractToken
30 {
31     private int _bufferLengthHighwater = 100;
32
33     public BodyToken(Location location)
34     {
35         super(location);
36     }
37
38     public void write(StringBuffer JavaDoc buffer, ScriptSession session)
39     {
40         if (buffer != null)
41             throw new IllegalArgumentException JavaDoc();
42
43         buffer = new StringBuffer JavaDoc(_bufferLengthHighwater);
44
45         writeChildren(buffer, session);
46
47         session.addBodyScript(buffer.toString());
48
49         // Store the buffer length from this run for the next run, since its
50 // going to be approximately the right size.
51
52         _bufferLengthHighwater = Math.max(_bufferLengthHighwater, buffer.length());
53     }
54 }
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