    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    }