content: /*
   * 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
   * DeferredAttrNSImpl.java at the same time.
   */
  
  package mf.org.apache.xerces.dom;
  
  /**
   * Attribute represents an XML-style attribute of an
   * Element. Typically, the allowable values are controlled by its
   * declaration in the Document Type Definition (DTD) governing this
   * kind of document.
   * <p/>
   * If the attribute has not been explicitly assigned a value, but has
   * been declared in the DTD, it will exist and have that default. Only
   * if neither the document nor the DTD specifies a value will the
   * Attribute really be considered absent and have no value; in that
   * case, querying the attribute will return null.
   * <p/>
   * Attributes may have multiple children that contain their data. (XML
   * allows attributes to contain entity references, and tokenized
   * attribute types such as NMTOKENS may have a child for each token.)
   * For convenience, the Attribute object's getValue() method returns
   * the string version of the attribute's value.
   * <p/>
   * Attributes are not children of the Elements they belong to, in the
   * usual sense, and have no valid Parent reference. However, the spec
   * says they _do_ belong to a specific Element, and an INUSE exception
   * is to be thrown if the user attempts to explicitly share them
   * between elements.
   * <p/>
   * Note that Elements do not permit attributes to appear to be shared
   * (see the INUSE exception), so this object's mutability is
   * officially not an issue.
   * <p/>
   * DeferredAttrImpl inherits from AttrImpl which does not support
   * Namespaces. DeferredAttrNSImpl, which inherits from AttrNSImpl, does.
   *
   * @author Andy Clark, IBM
   * @author Arnaud  Le Hors, IBM
   * @version $Id: DeferredAttrImpl.java 447266 2006-09-18 05:57:49Z mrglavas $
   * @xerces.internal
   * @see DeferredAttrNSImpl
   * @since PR-DOM-Level-1-19980818.
   */
  public final class DeferredAttrImpl
          extends AttrImpl
          implements DeferredNode {
  
      //
      // Constants
      //
  
      /**
       * Serialization version.
       */
      static final long serialVersionUID = 6903232312469148636L;
  
      //
      // 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.
       */
      DeferredAttrImpl(DeferredDocumentImpl ownerDocument, int nodeIndex) {
          super(ownerDocument, null);
  
          fNodeIndex = nodeIndex;
          needsSyncData(true);
          needsSyncChildren(true);
  
      } // <init>(DeferredDocumentImpl,int)
  
      //
      // DeferredNode methods
      //
  
      /**
       * Returns the node index.
       */
      @Override
      public int getNodeIndex() {
          return fNodeIndex;
      }
  
      //
      // Protected methods
      //
  
      /**
       * Synchronizes the data (name and value) for fast nodes.
       */
      @Override
      protected void synchronizeData() {
  
          // no need to sync in the future
          needsSyncData(false);
  
          // fluff data
          DeferredDocumentImpl ownerDocument =
                  (DeferredDocumentImpl) ownerDocument();
          name = ownerDocument.getNodeName(fNodeIndex);
          int extra = ownerDocument.getNodeExtra(fNodeIndex);
          isSpecified((extra & SPECIFIED) != 0);
          isIdAttribute((extra & ID) != 0);
  
          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.
       */
      @Override
      protected void synchronizeChildren() {
          DeferredDocumentImpl ownerDocument =
                  (DeferredDocumentImpl) ownerDocument();
          ownerDocument.synchronizeChildren(this, fNodeIndex);
      } // synchronizeChildren()
  
  } // class DeferredAttrImpl
  