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package com.sun.org.apache.xerces.internal.dom;

/**
 * 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.
 * 
 * @xerces.internal
 *
 * @version $Id: DeferredProcessingInstructionImpl.java,v 1.6 2010-11-01 04:39:39 joehw Exp $
 * @since  PR-DOM-Level-1-19980818.
 */
public class DeferredProcessingInstructionImpl
    extends ProcessingInstructionImpl 
    implements DeferredNode {

    //
    // Constants
    //

    /** Serialization version. */
    static final long serialVersionUID = -4643577954293565388L;
    
    //
    // 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.
     */
    DeferredProcessingInstructionImpl(DeferredDocumentImpl ownerDocument,
                                      int nodeIndex) {
        super(ownerDocument, null, null);

        fNodeIndex = nodeIndex;
        needsSyncData(true);

    } // (DeferredDocumentImpl,int)

    //
    // DeferredNode methods
    //

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

    //
    // Protected methods
    //

    /** Synchronizes the data. */
    protected void synchronizeData() {

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

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

    } // synchronizeData()

} // class DeferredProcessingInstructionImpl