    1   /*
    2    * Copyright 1999-2004 The Apache Software Foundation
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *     http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  package org.apache.commons.jxpath.ri.model.jdom;
    17
    18  import org.apache.commons.jxpath.ri.QName;
    19  import org.apache.commons.jxpath.ri.model.NodePointer;
    20  import org.apache.commons.jxpath.util.TypeUtils;
    21  import org.jdom.Attribute;
    22
    23  /***
    24   * A Pointer that points to a DOM node.
    25   *
    26   * @author Dmitri Plotnikov
    27   * @version $Revision: 1.10 $ $Date: 2004/04/01 02:55:31 $
    28   */
    29  public class JDOMAttributePointer extends NodePointer {
    30      private Attribute attr;
    31
    32      public JDOMAttributePointer(NodePointer parent, Attribute attr) {
    33          super(parent);
    34          this.attr = attr;
    35      }
    36
    37      public QName getName() {
    38          return new QName(
    39              JDOMNodePointer.getPrefix(attr),
    40              JDOMNodePointer.getLocalName(attr));
    41      }
    42
    43      public String getNamespaceURI() {
    44          String uri = attr.getNamespaceURI();
    45          if (uri != null && uri.equals("")) {
    46              uri = null;
    47          }
    48          return uri;
    49      }
    50
    51      public Object getValue() {
    52          return attr.getValue();
    53      }
    54
    55      public Object getBaseValue() {
    56          return attr;
    57      }
    58
    59      public boolean isCollection() {
    60          return false;
    61      }
    62
    63      public int getLength() {
    64          return 1;
    65      }
    66
    67      public Object getImmediateNode() {
    68          return attr;
    69      }
    70
    71      public boolean isActual() {
    72          return true;
    73      }
    74
    75      public boolean isLeaf() {
    76          return true;
    77      }
    78
    79      /***
    80       * Sets the value of this attribute.
    81       */
    82      public void setValue(Object value) {
    83          attr.setValue((String) TypeUtils.convert(value, String.class));
    84      }
    85
    86      public void remove() {
    87          attr.getParent().removeAttribute(attr);
    88      }
    89
    90      /***
    91       */
    92      public String asPath() {
    93          StringBuffer buffer = new StringBuffer();
    94          if (parent != null) {
    95              buffer.append(parent.asPath());
    96              if (buffer.length() == 0
    97                  || buffer.charAt(buffer.length() - 1) != '/') {
    98                  buffer.append('/');
    99              }
    100         }
    101         buffer.append('@');
    102         buffer.append(getName());
    103         return buffer.toString();
    104     }
    105
    106     public int hashCode() {
    107         return System.identityHashCode(attr);
    108     }
    109
    110     public boolean equals(Object object) {
    111         if (object == this) {
    112             return true;
    113         }
    114
    115         if (!(object instanceof JDOMAttributePointer)) {
    116             return false;
    117         }
    118
    119         JDOMAttributePointer other = (JDOMAttributePointer) object;
    120         return attr == other.attr;
    121     }
    122
    123     public int compareChildNodePointers(
    124             NodePointer pointer1,
    125             NodePointer pointer2)
    126     {
    127         // Won't happen - attributes don't have children
    128         return 0;
    129     }
    130 }