author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 07 Jan 2010 12:52:45 +0200 | |
changeset 1 | c42dffbd5b4f |
parent 0 | ba25891c3a9e |
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permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#ifndef DOMXPathEvaluator_HEADER_GUARD_ |
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#define DOMXPathEvaluator_HEADER_GUARD_ |
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|
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/* |
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* Licensed to the Apache Software Foundation (ASF) under one or more |
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* contributor license agreements. See the NOTICE file distributed with |
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* this work for additional information regarding copyright ownership. |
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* The ASF licenses this file to You under the Apache License, Version 2.0 |
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* (the "License"); you may not use this file except in compliance with |
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* the License. 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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#include <xercesc/util/XercesDefs.hpp> |
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|
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XERCES_CPP_NAMESPACE_BEGIN |
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class DOMXPathNSResolver; |
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class DOMXPathExpression; |
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class DOMNode; |
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|
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/** |
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* The evaluation of XPath expressions is provided by <code>DOMXPathEvaluator</code>. |
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* In a DOM implementation which supports the XPath 3.0 feature, the <code>DOMXPathEvaluator</code> |
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* interface will be implemented on the same object which implements the Document interface permitting |
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* it to be obtained by casting or by using the DOM Level 3 getInterface method. In this case the |
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* implementation obtained from the Document supports the XPath DOM module and is compatible |
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* with the XPath 1.0 specification. |
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* Evaluation of expressions with specialized extension functions or variables may not |
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* work in all implementations and is, therefore, not portable. XPathEvaluator implementations |
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* may be available from other sources that could provide specific support for specialized extension |
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* functions or variables as would be defined by other specifications. |
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* @since DOM Level 3 |
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*/ |
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class CDOM_EXPORT DOMXPathEvaluator |
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{ |
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protected: |
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// ----------------------------------------------------------------------- |
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// Hidden constructors |
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// ----------------------------------------------------------------------- |
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/** @name Hidden constructors */ |
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//@{ |
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DOMXPathEvaluator() {}; |
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//@} |
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private: |
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// ----------------------------------------------------------------------- |
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// Unimplemented constructors and operators |
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// ----------------------------------------------------------------------- |
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/** @name Unimplemented constructors and operators */ |
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//@{ |
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DOMXPathEvaluator(const DOMXPathEvaluator &); |
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DOMXPathEvaluator& operator = (const DOMXPathEvaluator&); |
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//@} |
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public: |
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// ----------------------------------------------------------------------- |
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// All constructors are hidden, just the destructor is available |
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// ----------------------------------------------------------------------- |
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/** @name Destructor */ |
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//@{ |
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/** |
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* Destructor |
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* |
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*/ |
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virtual ~DOMXPathEvaluator() {}; |
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//@} |
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// ----------------------------------------------------------------------- |
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// Virtual DOMDocument interface |
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// ----------------------------------------------------------------------- |
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/** @name Functions introduced in DOM Level 3 */ |
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//@{ |
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|
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/** |
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* Creates a parsed XPath expression with resolved namespaces. This is useful |
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* when an expression will be reused in an application since it makes it |
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* possible to compile the expression string into a more efficient internal |
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* form and preresolve all namespace prefixes which occur within the expression. |
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* @param expression of type XMLCh - The XPath expression string to be parsed. |
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* @param resolver of type <code>XPathNSResolver</code> - The resolver permits |
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* translation of all prefixes, including the xml namespace prefix, within the XPath expression |
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* into appropriate namespace URIs. If this is specified as null, any namespace |
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* prefix within the expression will result in <code>DOMException</code> being thrown with the |
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* code NAMESPACE_ERR. |
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* @return <code>XPathExpression</code> The compiled form of the XPath expression. |
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* @exception <code>XPathException</code> |
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* INVALID_EXPRESSION_ERR: Raised if the expression is not legal according to the |
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* rules of the <code>DOMXPathEvaluator</code>. |
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* @exception DOMException |
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* NAMESPACE_ERR: Raised if the expression contains namespace prefixes which cannot |
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* be resolved by the specified <code>XPathNSResolver</code>. |
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* @since DOM Level 3 |
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*/ |
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virtual const DOMXPathExpression* createExpression(const XMLCh *expression, const DOMXPathNSResolver *resolver) = 0; |
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120 |
|
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121 |
|
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/** Adapts any DOM node to resolve namespaces so that an XPath expression can be |
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* easily evaluated relative to the context of the node where it appeared within |
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* the document. This adapter works like the DOM Level 3 method lookupNamespaceURI |
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* on nodes in resolving the namespaceURI from a given prefix using the current |
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* information available in the node's hierarchy at the time lookupNamespaceURI |
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* is called. also correctly resolving the implicit xml prefix. |
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* @param nodeResolver of type <code>DOMNode</code> The node to be used as a context |
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* for namespace resolution. |
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* @return <code>XPathNSResolver</code> <code>XPathNSResolver</code> which resolves namespaces |
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* with respect to the definitions in scope for a specified node. |
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*/ |
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virtual const DOMXPathNSResolver* createNSResolver(DOMNode *nodeResolver) = 0; |
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134 |
|
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135 |
|
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/** |
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* Evaluates an XPath expression string and returns a result of the specified |
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* type if possible. |
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* @param expression of type XMLCh The XPath expression string to be parsed |
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* and evaluated. |
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* @param contextNode of type <code>DOMNode</code> The context is context node |
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* for the evaluation |
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* of this XPath expression. If the <code>DOMXPathEvaluator</code> was obtained by |
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* casting the <code>DOMDocument</code> then this must be owned by the same |
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* document and must be a <code>DOMDocument</code>, <code>DOMElement</code>, |
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* <code>DOMAttribute</code>, <code>DOMText</code>, <code>DOMCDATASection</code>, |
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* <code>DOMComment</code>, <code>DOMProcessingInstruction</code>, or |
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* <code>XPathNamespace</code> node. If the context node is a <code>DOMText</code> or |
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* a <code>DOMCDATASection</code>, then the context is interpreted as the whole |
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* logical text node as seen by XPath, unless the node is empty in which case it |
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* may not serve as the XPath context. |
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* @param resolver of type <code>XPathNSResolver</code> The resolver permits |
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* translation of all prefixes, including the xml namespace prefix, within |
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* the XPath expression into appropriate namespace URIs. If this is specified |
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* as null, any namespace prefix within the expression will result in |
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* <code>DOMException</code> being thrown with the code NAMESPACE_ERR. |
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* @param type of type unsigned short - If a specific type is specified, then |
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* the result will be returned as the corresponding type. |
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* For XPath 1.0 results, this must be one of the codes of the <code>XPathResult</code> |
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* interface. |
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* @param result of type void* - The result specifies a specific result object |
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* which may be reused and returned by this method. If this is specified as |
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* null or the implementation does not reuse the specified result, a new result |
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* object will be constructed and returned. |
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* For XPath 1.0 results, this object will be of type <code>XPathResult</code>. |
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* @return void* The result of the evaluation of the XPath expression. |
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* For XPath 1.0 results, this object will be of type <code>XPathResult</code>. |
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* @exception <code>XPathException</code> |
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* INVALID_EXPRESSION_ERR: Raised if the expression is not legal |
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* according to the rules of the <code>DOMXPathEvaluator</code> |
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* TYPE_ERR: Raised if the result cannot be converted to return the specified type. |
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* @exception DOMException |
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* NAMESPACE_ERR: Raised if the expression contains namespace prefixes |
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* which cannot be resolved by the specified <code>XPathNSResolver</code>. |
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* WRONG_DOCUMENT_ERR: The Node is from a document that is not supported |
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* by this <code>DOMXPathEvaluator</code>. |
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* NOT_SUPPORTED_ERR: The Node is not a type permitted as an XPath context |
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* node or the request type is not permitted by this <code>DOMXPathEvaluator</code>. |
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*/ |
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virtual void* evaluate(const XMLCh *expression, DOMNode *contextNode, const DOMXPathNSResolver *resolver, |
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unsigned short type, void* result) = 0; |
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|
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//@} |
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}; |
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XERCES_CPP_NAMESPACE_END |
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|
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#endif |