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1   /*
2    * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
3    * 
4    * This software is open source. 
5    * See the bottom of this file for the licence.
6    * 
7    * $Id: AttributeHelper.java,v 1.5 2004/06/25 08:03:41 maartenc Exp $
8    */
9   
10  package org.dom4j.util;
11  
12  import org.dom4j.Attribute;
13  import org.dom4j.Element;
14  import org.dom4j.QName;
15  
16  /*** <p><code>AttributeHelper</code> a number of helper methods for 
17    * working with attribute values.</p>
18    *
19    * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
20    * @version $Revision: 1.5 $
21    */
22  public class AttributeHelper {
23  
24      public static boolean booleanValue(Element element, String attributeName) {
25          return booleanValue( element.attribute( attributeName ) );
26      }
27      
28      public static boolean booleanValue(Element element, QName attributeQName) {
29          return booleanValue( element.attribute( attributeQName ) );
30      }
31      
32      protected static boolean booleanValue(Attribute attribute) {
33          if ( attribute == null ) {
34              return false;
35          }
36          Object value = attribute.getData();
37          if ( value == null ) {
38              return false;
39          }
40          else
41          if ( value instanceof Boolean ) {
42              Boolean b = (Boolean) value;
43              return b.booleanValue();
44          }
45          else {
46              return "true".equalsIgnoreCase( value.toString() );
47          }
48      }
49  }
50  
51  
52  
53  
54  /*
55   * Redistribution and use of this software and associated documentation
56   * ("Software"), with or without modification, are permitted provided
57   * that the following conditions are met:
58   *
59   * 1. Redistributions of source code must retain copyright
60   *    statements and notices.  Redistributions must also contain a
61   *    copy of this document.
62   *
63   * 2. Redistributions in binary form must reproduce the
64   *    above copyright notice, this list of conditions and the
65   *    following disclaimer in the documentation and/or other
66   *    materials provided with the distribution.
67   *
68   * 3. The name "DOM4J" must not be used to endorse or promote
69   *    products derived from this Software without prior written
70   *    permission of MetaStuff, Ltd.  For written permission,
71   *    please contact dom4j-info@metastuff.com.
72   *
73   * 4. Products derived from this Software may not be called "DOM4J"
74   *    nor may "DOM4J" appear in their names without prior written
75   *    permission of MetaStuff, Ltd. DOM4J is a registered
76   *    trademark of MetaStuff, Ltd.
77   *
78   * 5. Due credit should be given to the DOM4J Project - 
79   *    http://www.dom4j.org
80   *
81   * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS
82   * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
83   * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
84   * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
85   * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
86   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
87   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
88   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
89   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
90   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
91   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
92   * OF THE POSSIBILITY OF SUCH DAMAGE.
93   *
94   * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
95   *
96   * $Id: AttributeHelper.java,v 1.5 2004/06/25 08:03:41 maartenc Exp $
97   */