Commons JXPath example source code file (LangAttributePointer.java)

This example Commons JXPath source code file (LangAttributePointer.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

cannot, langattributepointer, langattributepointer, nodepointer, nodepointer, object, object, qname, string, string, stringbuffer, unsupportedoperationexception

The Commons JXPath LangAttributePointer.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.beans;

import org.apache.commons.jxpath.ri.QName;
import org.apache.commons.jxpath.ri.compiler.NodeTest;
import org.apache.commons.jxpath.ri.model.NodePointer;

/**
 * A Pointer that points to the "lang" attribute of a JavaBean. The value
 * of the attribute is based on the locale supplied to it in the constructor.
 *
 * @author Dmitri Plotnikov
 * @version $Revision: 652884 $ $Date: 2008-05-02 15:02:00 -0500 (Fri, 02 May 2008) $
 */
public class LangAttributePointer extends NodePointer {

    private static final long serialVersionUID = -8665319197100034134L;

    /**
     * Create a new LangAttributePointer.
     * @param parent parent pointer.
     */
    public LangAttributePointer(NodePointer parent) {
        super(parent);
    }

    public QName getName() {
        return new QName("xml", "lang");
    }

    public String getNamespaceURI() {
        return null;
    }

    public boolean isCollection() {
        return false;
    }

    public int getLength() {
        return 1;
    }

    public Object getBaseValue() {
        return parent.getLocale().toString().replace('_', '-');
    }

    public Object getImmediateNode() {
        return getBaseValue();
    }

    public boolean isLeaf() {
        return true;
    }

    /**
     * {@inheritDoc}
     *
     * Throws UnsupportedOperationException.
     * @param value Object
     */
    public void setValue(Object value) {
        throw new UnsupportedOperationException(
                "Cannot change locale using the 'lang' attribute");
    }

    public String asPath() {
        StringBuffer buffer = new StringBuffer();
        if (parent != null) {
            buffer.append(parent.asPath());
            if (buffer.length() == 0
                || buffer.charAt(buffer.length() - 1) != '/') {
                buffer.append('/');
            }
        }
        buffer.append("@xml:lang");
        return buffer.toString();
    }

    public int hashCode() {
        return 0;
    }

    public boolean equals(Object object) {
        return object instanceof LangAttributePointer;
    }

    public boolean testNode(NodeTest test) {
        return false;
    }

    public int compareChildNodePointers(
        NodePointer pointer1,
        NodePointer pointer2) {
        // Won't happen - lang attributes don't have children
        return 0;
    }
}