Commons JXPath example source code file (DynaBeanPointer.java)

This example Commons JXPath source code file (DynaBeanPointer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons JXPath tags/keywords

dynabean, dynabean, dynabeanpointer, dynabeanpointer, dynabeanpropertypointer, locale, object, object, propertyownerpointer, propertypointer, qname, qname, string, util, whole_collection

The Commons JXPath DynaBeanPointer.java source code

/*
 * 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.dynabeans;

import java.util.Locale;

import org.apache.commons.beanutils.DynaBean;
import org.apache.commons.jxpath.ri.QName;
import org.apache.commons.jxpath.ri.model.NodePointer;
import org.apache.commons.jxpath.ri.model.beans.PropertyOwnerPointer;
import org.apache.commons.jxpath.ri.model.beans.PropertyPointer;


/**
 * A Pointer that points to a {@link DynaBean}.  If the target DynaBean is Serializable,
 * so should this instance be.
 *
 * @author Dmitri Plotnikov
 * @version $Revision: 668329 $ $Date: 2008-06-16 16:59:48 -0500 (Mon, 16 Jun 2008) $
 */
public class DynaBeanPointer extends PropertyOwnerPointer {
    private static final long serialVersionUID = -9135052498044877965L;

    private QName name;
    private DynaBean dynaBean;

    /**
     * Create a new DynaBeanPointer.
     * @param name is the name given to the first node
     * @param dynaBean pointed
     * @param locale Locale
     */
    public DynaBeanPointer(QName name, DynaBean dynaBean, Locale locale) {
        super(null, locale);
        this.name = name;
        this.dynaBean = dynaBean;
    }

    /**
     * Create a new DynaBeanPointer.
     * @param parent pointer
     * @param name is the name given to the first node
     * @param dynaBean pointed
     */
    public DynaBeanPointer(NodePointer parent, QName name, DynaBean dynaBean) {
        super(parent);
        this.name = name;
        this.dynaBean = dynaBean;
    }

    public PropertyPointer getPropertyPointer() {
        return new DynaBeanPropertyPointer(this, dynaBean);
    }

    public QName getName() {
        return name;
    }

    public Object getBaseValue() {
        return dynaBean;
    }

    public Object getImmediateNode() {
        return dynaBean;
    }

    public boolean isCollection() {
        return false;
    }

    public int getLength() {
        return 1;
    }

    public boolean isLeaf() {
        return false;
    }

    public int hashCode() {
        return name == null ? 0 : name.hashCode();
    }

    public boolean equals(Object object) {
        if (object == this) {
            return true;
        }

        if (!(object instanceof DynaBeanPointer)) {
            return false;
        }

        DynaBeanPointer other = (DynaBeanPointer) object;
        if (!(equalObjects(parent, other.parent) && equalObjects(name, other.name))) {
            return false;
        }

        int iThis = (index == WHOLE_COLLECTION ? 0 : index);
        int iOther = (other.index == WHOLE_COLLECTION ? 0 : other.index);
        return iThis == iOther && dynaBean == other.dynaBean;
    }

    public String asPath() {
        return parent == null ? "/" : super.asPath();
    }

    /**
     * Learn whether two objects are == || .equals().
     * @param o1 first object
     * @param o2 second object
     * @return boolean
     */
    private static boolean equalObjects(Object o1, Object o2) {
        return o1 == o2 || o1 != null && o1.equals(o2);
    }
}