/*
 * 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.
 */

/*
 * WARNING: because java doesn't support multi-inheritance some code is
 * duplicated. If you're changing this file you probably want to change
 * DeferredAttrImpl.java at the same time.
 */


package org.apache.xerces.dom;

/**
 * DeferredAttrNSImpl is to AttrNSImpl, what DeferredAttrImpl is to
 * AttrImpl. 
 * 
 * @xerces.internal
 * 
 * @author Andy Clark, IBM
 * @author Arnaud  Le Hors, IBM
 * @version $Id: DeferredAttrNSImpl.java 447266 2006-09-18 05:57:49Z mrglavas $
 * @see DeferredAttrImpl
 */
public final class DeferredAttrNSImpl
    extends AttrNSImpl
    implements DeferredNode {

    //
    // Constants
    //

    /** Serialization version. */
    static final long serialVersionUID = 6074924934945957154L;

    //
    // 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.
     */
    DeferredAttrNSImpl(DeferredDocumentImpl ownerDocument, int nodeIndex) {
        super(ownerDocument, null);

        fNodeIndex = nodeIndex;
        needsSyncData(true);
        needsSyncChildren(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) ownerDocument();
        name = ownerDocument.getNodeName(fNodeIndex);

        // extract prefix and local part from QName
        int index = name.indexOf(':');
        if (index < 0) {
            localName = name;
        } 
        else {
            localName = name.substring(index + 1);
        }

        int extra = ownerDocument.getNodeExtra(fNodeIndex);
        isSpecified((extra & SPECIFIED) != 0);
        isIdAttribute((extra & ID) != 0);

        namespaceURI = ownerDocument.getNodeURI(fNodeIndex);
        
        int extraNode = ownerDocument.getLastChild(fNodeIndex);
        type = ownerDocument.getTypeInfo(extraNode);
    } // synchronizeData()

    /**
     * Synchronizes the node's children with the internal structure.
     * Fluffing the children at once solves a lot of work to keep
     * the two structures in sync. The problem gets worse when
     * editing the tree -- this makes it a lot easier.
     */
    protected void synchronizeChildren() {
        DeferredDocumentImpl ownerDocument =
            (DeferredDocumentImpl) ownerDocument();
        ownerDocument.synchronizeChildren(this, fNodeIndex);
    } // synchronizeChildren()

} // class DeferredAttrImpl
