    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
    018package org.apache.commons.jxpath.ri.model.jdom;
    019
    020import org.apache.commons.jxpath.ri.QName;
    021import org.apache.commons.jxpath.ri.model.NodePointer;
    022import org.apache.commons.jxpath.util.TypeUtils;
    023import org.jdom.Attribute;
    024
    025/**
    026 * A Pointer that points to a DOM node.
    027 */
    028public class JDOMAttributePointer extends NodePointer {
    029
    030    private static final long serialVersionUID = 8896050354479644028L;
    031
    032    /** JDOM Attribute. */
    033    private final Attribute attribute;
    034
    035    /**
    036     * Create a JDOMAttributePointer.
    037     *
    038     * @param parent NodePointer parent.
    039     * @param attribute   JDOM Attribute.
    040     */
    041    public JDOMAttributePointer(final NodePointer parent, final Attribute attribute) {
    042        super(parent);
    043        this.attribute = attribute;
    044    }
    045
    046    @Override
    047    public String asPath() {
    048        final StringBuilder buffer = new StringBuilder();
    049        if (parent != null) {
    050            buffer.append(parent.asPath());
    051            if (buffer.length() == 0 || buffer.charAt(buffer.length() - 1) != '/') {
    052                buffer.append('/');
    053            }
    054        }
    055        buffer.append('@');
    056        buffer.append(getName());
    057        return buffer.toString();
    058    }
    059
    060    @Override
    061    public int compareChildNodePointers(final NodePointer pointer1, final NodePointer pointer2) {
    062        // Won't happen - attributes don't have children
    063        return 0;
    064    }
    065
    066    @Override
    067    public boolean equals(final Object object) {
    068        return object == this || object instanceof JDOMAttributePointer && ((JDOMAttributePointer) object).attribute == attribute;
    069    }
    070
    071    @Override
    072    public Object getBaseValue() {
    073        return attribute;
    074    }
    075
    076    @Override
    077    public Object getImmediateNode() {
    078        return attribute;
    079    }
    080
    081    @Override
    082    public int getLength() {
    083        return 1;
    084    }
    085
    086    @Override
    087    public QName getName() {
    088        return new QName(JDOMNodePointer.getPrefix(attribute), JDOMNodePointer.getLocalName(attribute));
    089    }
    090
    091    @Override
    092    public String getNamespaceURI() {
    093        String uri = attribute.getNamespaceURI();
    094        if (uri != null && uri.isEmpty()) {
    095            uri = null;
    096        }
    097        return uri;
    098    }
    099
    100    @Override
    101    public Object getValue() {
    102        return attribute.getValue();
    103    }
    104
    105    @Override
    106    public int hashCode() {
    107        return System.identityHashCode(attribute);
    108    }
    109
    110    @Override
    111    public boolean isActual() {
    112        return true;
    113    }
    114
    115    @Override
    116    public boolean isCollection() {
    117        return false;
    118    }
    119
    120    @Override
    121    public boolean isLeaf() {
    122        return true;
    123    }
    124
    125    @Override
    126    public void remove() {
    127        attribute.getParent().removeAttribute(attribute);
    128    }
    129
    130    @Override
    131    public void setValue(final Object value) {
    132        attribute.setValue((String) TypeUtils.convert(value, String.class));
    133    }
    134}