BeanAttributeList 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.bean;
    9
    10  import java.util.AbstractList;
    11
    12  import org.dom4j.Attribute;
    13  import org.dom4j.QName;
    14
    15  /***
    16   * <p>
    17   * <code>BeanAttributeList</code> implements a list of Attributes which are
    18   * the properties of a JavaBean.
    19   * </p>
    20   *
    21   * @author <a href="mailto:james.strachan@metastuff.com">James Strachan </a>
    22   * @version $Revision: 1.9 $
    23   */
    24  public class BeanAttributeList extends AbstractList {
    25      /*** The BeanElement that this */
    26      private BeanElement parent;
    27
    28      /*** The BeanElement that this */
    29      private BeanMetaData beanMetaData;
    30
    31      /*** The attributes */
    32      private BeanAttribute[] attributes;
    33
    34      public BeanAttributeList(BeanElement parent, BeanMetaData beanMetaData) {
    35          this.parent = parent;
    36          this.beanMetaData = beanMetaData;
    37          this.attributes = new BeanAttribute[beanMetaData.attributeCount()];
    38      }
    39
    40      public BeanAttributeList(BeanElement parent) {
    41          this.parent = parent;
    42
    43          Object data = parent.getData();
    44          Class beanClass = (data != null) ? data.getClass() : null;
    45          this.beanMetaData = BeanMetaData.get(beanClass);
    46          this.attributes = new BeanAttribute[beanMetaData.attributeCount()];
    47      }
    48
    49      public Attribute attribute(String name) {
    50          int index = beanMetaData.getIndex(name);
    51
    52          return attribute(index);
    53      }
    54
    55      public Attribute attribute(QName qname) {
    56          int index = beanMetaData.getIndex(qname);
    57
    58          return attribute(index);
    59      }
    60
    61      public BeanAttribute attribute(int index) {
    62          if ((index >= 0) && (index <= attributes.length)) {
    63              BeanAttribute attribute = attributes[index];
    64
    65              if (attribute == null) {
    66                  attribute = createAttribute(parent, index);
    67                  attributes[index] = attribute;
    68              }
    69
    70              return attribute;
    71          }
    72
    73          return null;
    74      }
    75
    76      public BeanElement getParent() {
    77          return parent;
    78      }
    79
    80      public QName getQName(int index) {
    81          return beanMetaData.getQName(index);
    82      }
    83
    84      public Object getData(int index) {
    85          return beanMetaData.getData(index, parent.getData());
    86      }
    87
    88      public void setData(int index, Object data) {
    89          beanMetaData.setData(index, parent.getData(), data);
    90      }
    91
    92      // List interface
    93      // -------------------------------------------------------------------------
    94      public int size() {
    95          return attributes.length;
    96      }
    97
    98      public Object get(int index) {
    99          BeanAttribute attribute = attributes[index];
    100
    101         if (attribute == null) {
    102             attribute = createAttribute(parent, index);
    103             attributes[index] = attribute;
    104         }
    105
    106         return attribute;
    107     }
    108
    109     public boolean add(Object object) {
    110         throw new UnsupportedOperationException("add(Object) unsupported");
    111     }
    112
    113     public void add(int index, Object object) {
    114         throw new UnsupportedOperationException("add(int,Object) unsupported");
    115     }
    116
    117     public Object set(int index, Object object) {
    118         throw new UnsupportedOperationException("set(int,Object) unsupported");
    119     }
    120
    121     public boolean remove(Object object) {
    122         return false;
    123     }
    124
    125     public Object remove(int index) {
    126         BeanAttribute attribute = (BeanAttribute) get(index);
    127         Object oldValue = attribute.getValue();
    128         attribute.setValue(null);
    129
    130         return oldValue;
    131     }
    132
    133     public void clear() {
    134         for (int i = 0, size = attributes.length; i < size; i++) {
    135             BeanAttribute attribute = attributes[i];
    136
    137             if (attribute != null) {
    138                 attribute.setValue(null);
    139             }
    140         }
    141     }
    142
    143     // Implementation methods
    144     // -------------------------------------------------------------------------
    145     protected BeanAttribute createAttribute(BeanElement element, int index) {
    146         return new BeanAttribute(this, index);
    147     }
    148 }
    149
    150 /*
    151  * Redistribution and use of this software and associated documentation
    152  * ("Software"), with or without modification, are permitted provided that the
    153  * following conditions are met:
    154  *
    155  * 1. Redistributions of source code must retain copyright statements and
    156  * notices. Redistributions must also contain a copy of this document.
    157  *
    158  * 2. Redistributions in binary form must reproduce the above copyright notice,
    159  * this list of conditions and the following disclaimer in the documentation
    160  * and/or other materials provided with the distribution.
    161  *
    162  * 3. The name "DOM4J" must not be used to endorse or promote products derived
    163  * from this Software without prior written permission of MetaStuff, Ltd. For
    164  * written permission, please contact dom4j-info@metastuff.com.
    165  *
    166  * 4. Products derived from this Software may not be called "DOM4J" nor may
    167  * "DOM4J" appear in their names without prior written permission of MetaStuff,
    168  * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
    169  *
    170  * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
    171  *
    172  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
    173  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    174  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    175  * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
    176  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    177  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    178  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    179  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    180  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    181  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    182  * POSSIBILITY OF SUCH DAMAGE.
    183  *
    184  * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
    185  */