001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.commons.jxpath.ri.model.beans;
018
019 import org.apache.commons.jxpath.ri.QName;
020 import org.apache.commons.jxpath.ri.compiler.NodeTest;
021 import org.apache.commons.jxpath.ri.model.NodePointer;
022
023 /**
024 * A Pointer that points to the "lang" attribute of a JavaBean. The value
025 * of the attribute is based on the locale supplied to it in the constructor.
026 *
027 * @author Dmitri Plotnikov
028 * @version $Revision: 652884 $ $Date: 2008-05-02 15:02:00 -0500 (Fri, 02 May 2008) $
029 */
030 public class LangAttributePointer extends NodePointer {
031
032 private static final long serialVersionUID = -8665319197100034134L;
033
034 /**
035 * Create a new LangAttributePointer.
036 * @param parent parent pointer.
037 */
038 public LangAttributePointer(NodePointer parent) {
039 super(parent);
040 }
041
042 public QName getName() {
043 return new QName("xml", "lang");
044 }
045
046 public String getNamespaceURI() {
047 return null;
048 }
049
050 public boolean isCollection() {
051 return false;
052 }
053
054 public int getLength() {
055 return 1;
056 }
057
058 public Object getBaseValue() {
059 return parent.getLocale().toString().replace('_', '-');
060 }
061
062 public Object getImmediateNode() {
063 return getBaseValue();
064 }
065
066 public boolean isLeaf() {
067 return true;
068 }
069
070 /**
071 * {@inheritDoc}
072 *
073 * Throws UnsupportedOperationException.
074 * @param value Object
075 */
076 public void setValue(Object value) {
077 throw new UnsupportedOperationException(
078 "Cannot change locale using the 'lang' attribute");
079 }
080
081 public String asPath() {
082 StringBuffer buffer = new StringBuffer();
083 if (parent != null) {
084 buffer.append(parent.asPath());
085 if (buffer.length() == 0
086 || buffer.charAt(buffer.length() - 1) != '/') {
087 buffer.append('/');
088 }
089 }
090 buffer.append("@xml:lang");
091 return buffer.toString();
092 }
093
094 public int hashCode() {
095 return 0;
096 }
097
098 public boolean equals(Object object) {
099 return object instanceof LangAttributePointer;
100 }
101
102 public boolean testNode(NodeTest test) {
103 return false;
104 }
105
106 public int compareChildNodePointers(
107 NodePointer pointer1,
108 NodePointer pointer2) {
109 // Won't happen - lang attributes don't have children
110 return 0;
111 }
112 }