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146 lines
4.7 KiB
146 lines
4.7 KiB
/*
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* Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*/
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/*
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* Copyright 1999-2002,2004 The Apache Software Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* WARNING: because java doesn't support multi-inheritance some code is
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* duplicated. If you're changing this file you probably want to change
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* DeferredAttrNSImpl.java at the same time.
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*/
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package com.sun.org.apache.xerces.internal.dom;
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/**
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* Attribute represents an XML-style attribute of an
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* Element. Typically, the allowable values are controlled by its
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* declaration in the Document Type Definition (DTD) governing this
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* kind of document.
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* <P>
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* If the attribute has not been explicitly assigned a value, but has
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* been declared in the DTD, it will exist and have that default. Only
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* if neither the document nor the DTD specifies a value will the
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* Attribute really be considered absent and have no value; in that
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* case, querying the attribute will return null.
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* <P>
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* Attributes may have multiple children that contain their data. (XML
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* allows attributes to contain entity references, and tokenized
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* attribute types such as NMTOKENS may have a child for each token.)
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* For convenience, the Attribute object's getValue() method returns
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* the string version of the attribute's value.
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* <P>
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* Attributes are not children of the Elements they belong to, in the
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* usual sense, and have no valid Parent reference. However, the spec
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* says they _do_ belong to a specific Element, and an INUSE exception
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* is to be thrown if the user attempts to explicitly share them
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* between elements.
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* <P>
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* Note that Elements do not permit attributes to appear to be shared
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* (see the INUSE exception), so this object's mutability is
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* officially not an issue.
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* <P>
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* DeferredAttrImpl inherits from AttrImpl which does not support
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* Namespaces. DeferredAttrNSImpl, which inherits from AttrNSImpl, does.
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* @see DeferredAttrNSImpl
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*
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* @xerces.internal
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*
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* @author Andy Clark, IBM
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* @author Arnaud Le Hors, IBM
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* @since PR-DOM-Level-1-19980818.
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*/
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public final class DeferredAttrImpl
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extends AttrImpl
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implements DeferredNode {
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//
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// Constants
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//
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/** Serialization version. */
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static final long serialVersionUID = 6903232312469148636L;
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//
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// Data
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//
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/** Node index. */
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protected transient int fNodeIndex;
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//
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// Constructors
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//
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/**
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* This is the deferred constructor. Only the fNodeIndex is given here.
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* All other data, can be requested from the ownerDocument via the index.
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*/
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DeferredAttrImpl(DeferredDocumentImpl ownerDocument, int nodeIndex) {
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super(ownerDocument, null);
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fNodeIndex = nodeIndex;
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needsSyncData(true);
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needsSyncChildren(true);
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} // <init>(DeferredDocumentImpl,int)
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//
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// DeferredNode methods
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//
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/** Returns the node index. */
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public int getNodeIndex() {
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return fNodeIndex;
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}
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//
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// Protected methods
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//
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/** Synchronizes the data (name and value) for fast nodes. */
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protected void synchronizeData() {
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// no need to sync in the future
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needsSyncData(false);
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// fluff data
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DeferredDocumentImpl ownerDocument =
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(DeferredDocumentImpl) ownerDocument();
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name = ownerDocument.getNodeName(fNodeIndex);
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int extra = ownerDocument.getNodeExtra(fNodeIndex);
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isSpecified((extra & SPECIFIED) != 0);
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isIdAttribute((extra & ID) != 0);
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int extraNode = ownerDocument.getLastChild(fNodeIndex);
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type = ownerDocument.getTypeInfo(extraNode);
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} // synchronizeData()
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/**
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* Synchronizes the node's children with the internal structure.
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* Fluffing the children at once solves a lot of work to keep
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* the two structures in sync. The problem gets worse when
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* editing the tree -- this makes it a lot easier.
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*/
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protected void synchronizeChildren() {
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DeferredDocumentImpl ownerDocument =
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(DeferredDocumentImpl) ownerDocument();
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ownerDocument.synchronizeChildren(this, fNodeIndex);
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} // synchronizeChildren()
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} // class DeferredAttrImpl
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