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Commons JXPath example source code file (NamespacePointer.java)

This example Commons JXPath source code file (NamespacePointer.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, dom, namespacepointer, namespacepointer, nodepointer, nodepointer, nodetypetest, object, object, qname, string, string, stringbuffer, unsupportedoperationexception

The Commons JXPath NamespacePointer.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.dom;

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

/**
 * Represents a namespace node.
 *
 * @author Dmitri Plotnikov
 * @version $Revision: 652884 $ $Date: 2008-05-02 15:02:00 -0500 (Fri, 02 May 2008) $
 */
public class NamespacePointer extends NodePointer {
    private String prefix;
    private String namespaceURI;

    private static final long serialVersionUID = -7622456151550131709L;

    /**
     * Create a new NamespacePointer.
     * @param parent parent pointer
     * @param prefix associated ns prefix.
     */
    public NamespacePointer(NodePointer parent, String prefix) {
        super(parent);
        this.prefix = prefix;
    }

    /**
     * Create a new NamespacePointer.
     * @param parent parent pointer
     * @param prefix associated ns prefix.
     * @param namespaceURI associated ns URI.
     */
    public NamespacePointer(
        NodePointer parent,
        String prefix,
        String namespaceURI) {
        super(parent);
        this.prefix = prefix;
        this.namespaceURI = namespaceURI;
    }

    public QName getName() {
        return new QName(prefix);
    }

    public Object getBaseValue() {
        return null;
    }

    public boolean isCollection() {
        return false;
    }

    public int getLength() {
        return 1;
    }

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

    public String getNamespaceURI() {
        if (namespaceURI == null) {
            namespaceURI = parent.getNamespaceURI(prefix);
        }
        return namespaceURI;
    }

    public boolean isLeaf() {
        return true;
    }

    /**
     * Throws UnsupportedOperationException.
     * @param value Object
     */
    public void setValue(Object value) {
        throw new UnsupportedOperationException("Cannot modify DOM trees");
    }

    public boolean testNode(NodeTest nodeTest) {
        return nodeTest == null
            || ((nodeTest instanceof NodeTypeTest)
                && ((NodeTypeTest) nodeTest).getNodeType()
                    == Compiler.NODE_TYPE_NODE);
    }

    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("namespace::");
        buffer.append(prefix);
        return buffer.toString();
    }

    public int hashCode() {
        return prefix.hashCode();
    }

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

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

        NamespacePointer other = (NamespacePointer) object;
        return prefix.equals(other.prefix);
    }

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

Other Commons JXPath examples (source code examples)

Here is a short list of links related to this Commons JXPath NamespacePointer.java source code file:

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