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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.tags.ant;
17  
18  import java.lang.reflect.InvocationTargetException;
19  
20  import org.apache.commons.beanutils.BeanUtils;
21  import org.apache.commons.jelly.JellyTagException;
22  import org.apache.commons.jelly.MissingAttributeException;
23  import org.apache.commons.jelly.TagSupport;
24  import org.apache.commons.jelly.XMLOutput;
25  
26  /***
27   * A tag which creates a new FileScanner bean instance that can be used to
28   * iterate over fileSets
29   *
30   * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
31   * @version $Revision: 155420 $
32   */
33  public class FileScannerTag extends TagSupport implements TaskSource {
34  
35      /*** The file walker that gets created */
36      private FileScanner fileScanner;
37  
38      /*** the variable exported */
39      private String var;
40  
41      public FileScannerTag(FileScanner fileScanner) {
42          this.fileScanner = fileScanner;
43      }
44  
45      // Tag interface
46      //-------------------------------------------------------------------------
47      public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException {
48          fileScanner.setProject(AntTagLibrary.getProject(context));
49  
50          fileScanner.clear();
51  
52          // run the body first to configure the task via nested
53          invokeBody(output);
54  
55          // output the fileScanner
56          if ( var == null ) {
57              throw new MissingAttributeException( "var" );
58          }
59          context.setVariable( var, fileScanner );
60  
61      }
62  
63      // TaskSource interface
64      //-------------------------------------------------------------------------
65      public Object getTaskObject() {
66          return fileScanner;
67      }
68  
69      /***
70       * Allows nested tags to set a property on the task object of this tag
71       */
72      public void setTaskProperty(String name, Object value) throws JellyTagException {
73          try {
74              BeanUtils.setProperty( fileScanner, name, value );
75          }
76          catch (IllegalAccessException ex) {
77              throw new JellyTagException(ex);
78          }
79          catch (InvocationTargetException ex) {
80              throw new JellyTagException(ex);
81          }
82      }
83  
84      // Properties
85      //-------------------------------------------------------------------------
86  
87      /***
88       * @return the Ant task
89       */
90      public FileScanner getFileScanner() {
91          return fileScanner;
92      }
93  
94      /*** Sets the name of the variable exported by this tag */
95      public void setVar(String var) {
96          this.var = var;
97      }
98  
99  }