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Java example source code file (ProcessingInstructionImpl.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

characterdataimpl, dom, processinginstruction, processinginstructionimpl, string

The ProcessingInstructionImpl.java Java example source code

/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * Copyright 1999-2002,2004 The Apache Software Foundation.
 *
 * Licensed 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 com.sun.org.apache.xerces.internal.dom;

import org.w3c.dom.Node;
import org.w3c.dom.ProcessingInstruction;

/**
 * Processing Instructions (PIs) permit documents to carry
 * processor-specific information alongside their actual content. PIs
 * are most common in XML, but they are supported in HTML as well.
 *
 * This class inherits from CharacterDataImpl to reuse its setNodeValue method.
 *
 * @xerces.internal
 *
 * @since  PR-DOM-Level-1-19980818.
 */
public class ProcessingInstructionImpl
    extends CharacterDataImpl
    implements ProcessingInstruction {

    //
    // Constants
    //

    /** Serialization version. */
    static final long serialVersionUID = 7554435174099981510L;

    //
    // Data
    //

    protected String target;

    //
    // Constructors
    //

    /** Factory constructor. */
    public ProcessingInstructionImpl(CoreDocumentImpl ownerDoc,
                                     String target, String data) {
        super(ownerDoc, data);
        this.target = target;
    }

    //
    // Node methods
    //

    /**
     * A short integer indicating what type of node this is. The named
     * constants for this value are defined in the org.w3c.dom.Node interface.
     */
    public short getNodeType() {
        return Node.PROCESSING_INSTRUCTION_NODE;
    }

    /**
     * Returns the target
     */
    public String getNodeName() {
        if (needsSyncData()) {
            synchronizeData();
        }
        return target;
    }

    //
    // ProcessingInstruction methods
    //

    /**
     * A PI's "target" states what processor channel the PI's data
     * should be directed to. It is defined differently in HTML and XML.
     * <p>
     * In XML, a PI's "target" is the first (whitespace-delimited) token
     * following the "<?" token that begins the PI.
     * <p>
     * In HTML, target is always null.
     * <p>
     * Note that getNodeName is aliased to getTarget.
     */
    public String getTarget() {
        if (needsSyncData()) {
            synchronizeData();
        }
        return target;

    } // getTarget():String

    /**
     * A PI's data content tells the processor what we actually want it
     * to do.  It is defined slightly differently in HTML and XML.
     * <p>
     * In XML, the data begins with the non-whitespace character
     * immediately after the target -- @see getTarget().
     * <p>
     * In HTML, the data begins with the character immediately after the
     * "<?" token that begins the PI.
     * <p>
     * Note that getNodeValue is aliased to getData
     */
    public String getData() {
        if (needsSyncData()) {
            synchronizeData();
        }
        return data;

    } // getData():String

    /**
     * Change the data content of this PI.
     * Note that setData is aliased to setNodeValue.
     * @see #getData().
     * @throws DOMException(NO_MODIFICATION_ALLOWED_ERR) if node is read-only.
     */
    public void setData(String data) {
        // Hand off to setNodeValue for code-reuse reasons (mutation
        // events, readonly protection, synchronizing, etc.)
        setNodeValue(data);
    } // setData(String)



   /**
     * Returns the absolute base URI of this node or null if the implementation
     * wasn't able to obtain an absolute URI. Note: If the URI is malformed, a
     * null is returned.
     *
     * @return The absolute base URI of this node or null.
     * @since DOM Level 3
     */
    public String getBaseURI() {

        if (needsSyncData()) {
            synchronizeData();
        }
        return ownerNode.getBaseURI();
    }


} // class ProcessingInstructionImpl

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