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.dynamic;
018
019 import java.util.Locale;
020
021 import org.apache.commons.jxpath.DynamicPropertyHandler;
022 import org.apache.commons.jxpath.JXPathIntrospector;
023 import org.apache.commons.jxpath.ri.QName;
024 import org.apache.commons.jxpath.ri.model.NodeIterator;
025 import org.apache.commons.jxpath.ri.model.NodePointer;
026 import org.apache.commons.jxpath.ri.model.beans.PropertyIterator;
027 import org.apache.commons.jxpath.ri.model.beans.PropertyOwnerPointer;
028 import org.apache.commons.jxpath.ri.model.beans.PropertyPointer;
029
030 /**
031 * A Pointer that points to an object with Dynamic Properties. It is used for
032 * the first element of a path; following elements will by of type
033 * {@link PropertyPointer}.
034 *
035 * @author Dmitri Plotnikov
036 * @version $Revision: 652884 $ $Date: 2008-05-02 15:02:00 -0500 (Fri, 02 May 2008) $
037 */
038 public class DynamicPointer extends PropertyOwnerPointer {
039 private QName name;
040 private Object bean;
041 private DynamicPropertyHandler handler;
042
043 private static final long serialVersionUID = -1842347025295904256L;
044
045 /**
046 * Create a new DynamicPointer.
047 * @param name property name
048 * @param bean owning bean
049 * @param handler DynamicPropertyHandler
050 * @param locale Locale
051 */
052 public DynamicPointer(QName name, Object bean,
053 DynamicPropertyHandler handler, Locale locale) {
054 super(null, locale);
055 this.name = name;
056 this.bean = bean;
057 this.handler = handler;
058 }
059
060 /**
061 * Create a new DynamicPointer.
062 * @param parent parent pointer
063 * @param name property name
064 * @param bean owning bean
065 * @param handler DynamicPropertyHandler
066 */
067 public DynamicPointer(NodePointer parent, QName name,
068 Object bean, DynamicPropertyHandler handler) {
069 super(parent);
070 this.name = name;
071 this.bean = bean;
072 this.handler = handler;
073 }
074
075 public PropertyPointer getPropertyPointer() {
076 return new DynamicPropertyPointer(this, handler);
077 }
078
079 public NodeIterator createNodeIterator(
080 String property, boolean reverse, NodePointer startWith) {
081 return new PropertyIterator(this, property, reverse, startWith);
082 }
083
084 public NodeIterator attributeIterator(QName name) {
085 return new DynamicAttributeIterator(this, name);
086 }
087
088 public QName getName() {
089 return name;
090 }
091
092 public boolean isDynamicPropertyDeclarationSupported() {
093 return true;
094 }
095
096 /**
097 * Returns the DP object iself.
098 * @return Object
099 */
100 public Object getBaseValue() {
101 return bean;
102 }
103
104 public boolean isLeaf() {
105 Object value = getNode();
106 return value == null || JXPathIntrospector.getBeanInfo(value.getClass()).isAtomic();
107 }
108
109 public boolean isCollection() {
110 return false;
111 }
112
113 /**
114 * Returns 1.
115 * @return int
116 */
117 public int getLength() {
118 return 1;
119 }
120
121 public String asPath() {
122 return parent == null ? "/" : super.asPath();
123 }
124
125 public int hashCode() {
126 return System.identityHashCode(bean) + name.hashCode();
127 }
128
129 public boolean equals(Object object) {
130 if (object == this) {
131 return true;
132 }
133
134 if (!(object instanceof DynamicPointer)) {
135 return false;
136 }
137
138 DynamicPointer other = (DynamicPointer) object;
139 return bean == other.bean && name.equals(other.name);
140 }
141 }