/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.jxpath.ri.model.beans;
import java.util.Locale;
import org.apache.commons.jxpath.JXPathContext;
import org.apache.commons.jxpath.ri.QName;
import org.apache.commons.jxpath.ri.model.NodePointer;
/**
* Pointer whose value is <code>null</code>.
* @author Dmitri Plotnikov
* @version $Revision: 652915 $ $Date: 2008-05-02 16:12:57 -0500 (Fri, 02 May 2008) $
*/
public class NullPointer extends PropertyOwnerPointer {
private QName name;
private String id;
private static final long serialVersionUID = 2193425983220679887L;
/**
* Create a new NullPointer.
* @param name node name
* @param locale Locale
*/
public NullPointer(QName name, Locale locale) {
super(null, locale);
this.name = name;
}
/**
* Used for the root node.
* @param parent parent pointer
* @param name node name
*/
public NullPointer(NodePointer parent, QName name) {
super(parent);
this.name = name;
}
/**
* Create a new NullPointer.
* @param locale Locale
* @param id String
*/
public NullPointer(Locale locale, String id) {
super(null, locale);
this.id = id;
}
public QName getName() {
return name;
}
public Object getBaseValue() {
return null;
}
public boolean isCollection() {
return false;
}
public boolean isLeaf() {
return true;
}
public boolean isActual() {
return false;
}
public PropertyPointer getPropertyPointer() {
return new NullPropertyPointer(this);
}
public NodePointer createPath(JXPathContext context, Object value) {
if (parent != null) {
return parent.createPath(context, value).getValuePointer();
}
throw new UnsupportedOperationException(
"Cannot create the root object: " + asPath());
}
public NodePointer createPath(JXPathContext context) {
if (parent != null) {
return parent.createPath(context).getValuePointer();
}
throw new UnsupportedOperationException(
"Cannot create the root object: " + asPath());
}
public NodePointer createChild(
JXPathContext context,
QName name,
int index) {
return createPath(context).createChild(context, name, index);
}
public NodePointer createChild(
JXPathContext context,
QName name,
int index,
Object value) {
return createPath(context).createChild(context, name, index, value);
}
public int hashCode() {
return name == null ? 0 : name.hashCode();
}
public boolean equals(Object object) {
if (object == this) {
return true;
}
if (!(object instanceof NullPointer)) {
return false;
}
NullPointer other = (NullPointer) object;
return name == other.name || name != null && name.equals(other.name);
}
public String asPath() {
if (id != null) {
return "id(" + id + ")";
}
return parent == null ? "null()" : super.asPath();
}
public int getLength() {
return 0;
}
}
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