deferredcdatasectionimpl.java

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/*
 * 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;

/**
 * XML provides the CDATA markup to allow a region of text in which
 * most of the XML delimiter recognition does not take place. This is
 * intended to ease the task of quoting XML fragments and other
 * programmatic information in a document's text without needing to
 * escape these special characters. It's primarily a convenience feature
 * for those who are hand-editing XML.
 * <P>
 * CDATASection is an Extended DOM feature, and is not used in HTML 
 * contexts.
 * <P>
 * Within the DOM, CDATASections are treated essentially as Text
 * blocks. Their distinct type is retained in order to allow us to
 * properly recreate the XML syntax when we write them out.
 * <P>
 * Reminder: CDATA IS NOT A COMPLETELY GENERAL SOLUTION; it can't
 * quote its own end-of-block marking. If you need to write out a
 * CDATA that contains the ]]> sequence, it's your responsibility to
 * split that string over two successive CDATAs at that time.
 * <P>
 * CDATA does not participate in Element.normalize() processing.
 * 
 * @xerces.internal
 *
 * @version $Id: DeferredCDATASectionImpl.java,v 1.2.6.1 2005/08/31 10:20:23 sunithareddy Exp $
 * @since  PR-DOM-Level-1-19980818.
 */
public class DeferredCDATASectionImpl 
    extends CDATASectionImpl 
    implements DeferredNode {

    //
    // Constants
    //

    /** Serialization version. */
    static final long serialVersionUID = 1983580632355645726L;

    //
    // Data
    //

    /** Node index. */
    protected transient int fNodeIndex;

    //
    // Constructors
    //

    /**
     * This is the deferred constructor. Only the fNodeIndex is given here. All other data,
     * can be requested from the ownerDocument via the index.
     */
    DeferredCDATASectionImpl(DeferredDocumentImpl ownerDocument, int nodeIndex) {
        super(ownerDocument, null);

        fNodeIndex = nodeIndex;
        needsSyncData(true);

    } // <init>(DeferredDocumentImpl,int)
    
    //
    // DeferredNode methods
    //

    /** Returns the node index. */
    public int getNodeIndex() {
        return fNodeIndex;
    }

    //
    // Protected methods
    //

    /** Synchronizes the data (name and value) for fast nodes. */
    protected void synchronizeData() {

        // no need to sync in the future
        needsSyncData(false);

        // fluff data
        DeferredDocumentImpl ownerDocument =
            (DeferredDocumentImpl) this.ownerDocument();
        data = ownerDocument.getNodeValueString(fNodeIndex);

    } // synchronizeData()

} // class DeferredCDATASectionImpl