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Java > Open Source Codes > org > apache > commons > jelly > impl > CompositeTextScriptBlock


1 /*
2  * Copyright 2002,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.commons.jelly.impl;
17
18 import java.util.List JavaDoc;
19
20 import org.apache.commons.jelly.Script;
21
22
23 /**
24  * <p><code>CompositeTextScriptBlock</code> represents a text body of a
25  * a tag which contains expressions, so that whitespace trimming
26  * can be handled differently.</p>
27  *
28  * @author <a HREF="mailto:jstrachan@apache.org">James Strachan</a>
29  * @version $Revision: 155420 $
30  */
31 public class CompositeTextScriptBlock extends ScriptBlock {
32
33     /**
34      * Create an instance.
35      */
36     public CompositeTextScriptBlock() {
37     }
38     
39     
40     /**
41      * Trim the body of the script.
42      * In this case, trim the whitespace from the start of the first element
43      * and from the end of the last element.
44      */
45     public void trimWhitespace() {
46         List JavaDoc list = getScriptList();
47         int size = list.size();
48         if ( size > 0 ) {
49             Script script = (Script) list.get(0);
50             if ( script instanceof TextScript ) {
51                 TextScript textScript = (TextScript) script;
52                 textScript.trimWhitespace();
53             }
54             if ( size > 1 ) {
55                 script = (Script) list.get(size - 1);
56                 if ( script instanceof TextScript ) {
57                     TextScript textScript = (TextScript) script;
58                     textScript.trimWhitespace();
59                 }
60             }
61         }
62     }
63
64
65 }
66
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