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    1   /*
    2    * Copyright 2001-2005 (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
    8   package org.dom4j.util;
    9
    10  import org.dom4j.Attribute;
    11  import org.dom4j.Element;
    12  import org.dom4j.QName;
    13
    14  /***
    15   * <p>
    16   * <code>AttributeHelper</code> a number of helper methods for working with
    17   * attribute values.
    18   * </p>
    19   *
    20   * @author <a href="mailto:jstrachan@apache.org">James Strachan </a>
    21   * @version $Revision: 1.7 $
    22   */
    23  public class AttributeHelper {
    24      protected AttributeHelper() {
    25      }
    26
    27      public static boolean booleanValue(Element element, String attributeName) {
    28          return booleanValue(element.attribute(attributeName));
    29      }
    30
    31      public static boolean booleanValue(Element element, QName attributeQName) {
    32          return booleanValue(element.attribute(attributeQName));
    33      }
    34
    35      protected static boolean booleanValue(Attribute attribute) {
    36          if (attribute == null) {
    37              return false;
    38          }
    39
    40          Object value = attribute.getData();
    41
    42          if (value == null) {
    43              return false;
    44          } else if (value instanceof Boolean) {
    45              Boolean b = (Boolean) value;
    46
    47              return b.booleanValue();
    48          } else {
    49              return "true".equalsIgnoreCase(value.toString());
    50          }
    51      }
    52  }
    53
    54  /*
    55   * Redistribution and use of this software and associated documentation
    56   * ("Software"), with or without modification, are permitted provided that the
    57   * following conditions are met:
    58   *
    59   * 1. Redistributions of source code must retain copyright statements and
    60   * notices. Redistributions must also contain a copy of this document.
    61   *
    62   * 2. Redistributions in binary form must reproduce the above copyright notice,
    63   * this list of conditions and the following disclaimer in the documentation
    64   * and/or other materials provided with the distribution.
    65   *
    66   * 3. The name "DOM4J" must not be used to endorse or promote products derived
    67   * from this Software without prior written permission of MetaStuff, Ltd. For
    68   * written permission, please contact dom4j-info@metastuff.com.
    69   *
    70   * 4. Products derived from this Software may not be called "DOM4J" nor may
    71   * "DOM4J" appear in their names without prior written permission of MetaStuff,
    72   * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
    73   *
    74   * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
    75   *
    76   * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
    77   * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    78   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    79   * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
    80   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    81   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    82   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    83   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    84   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    85   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    86   * POSSIBILITY OF SUCH DAMAGE.
    87   *
    88   * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
    89   */