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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;
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 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.trimStartWhitespace();
53              }
54              if ( size > 1 ) {
55                  script = (Script) list.get(size - 1);
56                  if ( script instanceof TextScript ) {
57                      TextScript textScript = (TextScript) script;
58                      textScript.trimEndWhitespace();
59                  }
60              }
61          }
62      }
63  
64  
65  }