001/*
002 * Copyright 2001 (C) MetaStuff, Ltd. All Rights Reserved.
003 * 
004 * This software is open source. 
005 * See the bottom of this file for the licence.
006 * 
007 * $Id: AttributeHelper.java,v 1.1 2001/05/30 22:24:27 jstrachan Exp $
008 */
009
010package org.dom4j.util;
011
012import org.dom4j.Attribute;
013import org.dom4j.Element;
014import org.dom4j.Node;
015import org.dom4j.QName;
016
017/** <p><code>AttributeHelper</code> a number of helper methods for 
018  * working with attribute values.</p>
019  *
020  * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
021  * @version $Revision: 1.1 $
022  */
023public class AttributeHelper {
024
025    public static boolean booleanValue(Element element, String attributeName) {
026        return booleanValue( element.attribute( attributeName ) );
027    }
028    
029    public static boolean booleanValue(Element element, QName attributeQName) {
030        return booleanValue( element.attribute( attributeQName ) );
031    }
032    
033    protected static boolean booleanValue(Attribute attribute) {
034        if ( attribute == null ) {
035            return false;
036        }
037        Object value = attribute.getData();
038        if ( value == null ) {
039            return false;
040        }
041        else
042        if ( value instanceof Boolean ) {
043            Boolean b = (Boolean) value;
044            return b.booleanValue();
045        }
046        else {
047            return "true".equalsIgnoreCase( value.toString() );
048        }
049    }
050}
051
052
053
054
055/*
056 * Redistribution and use of this software and associated documentation
057 * ("Software"), with or without modification, are permitted provided
058 * that the following conditions are met:
059 *
060 * 1. Redistributions of source code must retain copyright
061 *    statements and notices.  Redistributions must also contain a
062 *    copy of this document.
063 *
064 * 2. Redistributions in binary form must reproduce the
065 *    above copyright notice, this list of conditions and the
066 *    following disclaimer in the documentation and/or other
067 *    materials provided with the distribution.
068 *
069 * 3. The name "DOM4J" must not be used to endorse or promote
070 *    products derived from this Software without prior written
071 *    permission of MetaStuff, Ltd.  For written permission,
072 *    please contact dom4j-info@metastuff.com.
073 *
074 * 4. Products derived from this Software may not be called "DOM4J"
075 *    nor may "DOM4J" appear in their names without prior written
076 *    permission of MetaStuff, Ltd. DOM4J is a registered
077 *    trademark of MetaStuff, Ltd.
078 *
079 * 5. Due credit should be given to the DOM4J Project
080 *    (http://dom4j.org/).
081 *
082 * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS
083 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
084 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
085 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
086 * METASTUFF, LTD. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
087 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
088 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
089 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
090 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
091 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
092 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
093 * OF THE POSSIBILITY OF SUCH DAMAGE.
094 *
095 * Copyright 2001 (C) MetaStuff, Ltd. All Rights Reserved.
096 *
097 * $Id: AttributeHelper.java,v 1.1 2001/05/30 22:24:27 jstrachan Exp $
098 */