UserDataElement xref

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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.Element;
    11  import org.dom4j.QName;
    12  import org.dom4j.tree.DefaultElement;
    13
    14  /***
    15   * <p>
    16   * <code>UserDataElement</code> support the adornment of a user data object on
    17   * an Element or Attribute instance such that the methods {@link#getData}
    18   * {@link #setData(Object)}will get and set the values of a user data object.
    19   * This can be useful for developers wishing to create XML trees and adorn the
    20   * trees with user defined objects.
    21   * </p>
    22   *
    23   * @author <a href="mailto:james.strachan@metastuff.com">James Strachan </a>
    24   * @version $Revision: 1.12 $
    25   */
    26  public class UserDataElement extends DefaultElement {
    27      /*** The user data object */
    28      private Object data;
    29
    30      public UserDataElement(String name) {
    31          super(name);
    32      }
    33
    34      public UserDataElement(QName qname) {
    35          super(qname);
    36      }
    37
    38      public Object getData() {
    39          return data;
    40      }
    41
    42      public void setData(Object data) {
    43          this.data = data;
    44      }
    45
    46      public String toString() {
    47          return super.toString() + " userData: " + data;
    48      }
    49
    50      public Object clone() {
    51          UserDataElement answer = (UserDataElement) super.clone();
    52
    53          if (answer != this) {
    54              answer.data = getCopyOfUserData();
    55          }
    56
    57          return answer;
    58      }
    59
    60      // Implementation methods
    61      // -------------------------------------------------------------------------
    62
    63      /***
    64       * If a deep copy of user data is required whenever the clone() or
    65       * createCopy() methods are called on this element then this method should
    66       * return a clone of the user data
    67       *
    68       * @return DOCUMENT ME!
    69       */
    70      protected Object getCopyOfUserData() {
    71          return data;
    72      }
    73
    74      protected Element createElement(String name) {
    75          Element answer = getDocumentFactory().createElement(name);
    76          answer.setData(getCopyOfUserData());
    77
    78          return answer;
    79      }
    80
    81      protected Element createElement(QName qName) {
    82          Element answer = getDocumentFactory().createElement(qName);
    83          answer.setData(getCopyOfUserData());
    84
    85          return answer;
    86      }
    87
    88      // protected DocumentFactory getDocumentFactory() {
    89      // return DOCUMENT_FACTORY;
    90      // }
    91  }
    92
    93  /*
    94   * Redistribution and use of this software and associated documentation
    95   * ("Software"), with or without modification, are permitted provided that the
    96   * following conditions are met:
    97   *
    98   * 1. Redistributions of source code must retain copyright statements and
    99   * notices. Redistributions must also contain a copy of this document.
    100  *
    101  * 2. Redistributions in binary form must reproduce the above copyright notice,
    102  * this list of conditions and the following disclaimer in the documentation
    103  * and/or other materials provided with the distribution.
    104  *
    105  * 3. The name "DOM4J" must not be used to endorse or promote products derived
    106  * from this Software without prior written permission of MetaStuff, Ltd. For
    107  * written permission, please contact dom4j-info@metastuff.com.
    108  *
    109  * 4. Products derived from this Software may not be called "DOM4J" nor may
    110  * "DOM4J" appear in their names without prior written permission of MetaStuff,
    111  * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
    112  *
    113  * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
    114  *
    115  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
    116  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    117  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    118  * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
    119  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    120  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    121  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    122  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    123  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    124  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    125  * POSSIBILITY OF SUCH DAMAGE.
    126  *
    127  * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
    128  */