676 lines
24 KiB
C++
676 lines
24 KiB
C++
/*
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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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* $Id: DOMLSParserImpl.hpp 673679 2008-07-03 13:50:10Z borisk $
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*/
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#if !defined(XERCESC_INCLUDE_GUARD_DOMBUILDERIMPL_HPP)
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#define XERCESC_INCLUDE_GUARD_DOMBUILDERIMPL_HPP
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#include <xercesc/parsers/AbstractDOMParser.hpp>
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#include <xercesc/dom/DOMLSParser.hpp>
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#include <xercesc/dom/DOMLSInput.hpp>
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#include <xercesc/dom/DOMConfiguration.hpp>
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#include <xercesc/util/XercesDefs.hpp>
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#include <xercesc/util/RefVectorOf.hpp>
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XERCES_CPP_NAMESPACE_BEGIN
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class XMLEntityResolver;
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class XMLResourceIdentifier;
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class DOMStringListImpl;
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class DOMLSResourceResolver;
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/**
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* Introduced in DOM Level 3
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*
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* DOMLSParserImpl provides an implementation of a DOMLSParser interface.
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* A DOMLSParser instance is obtained from the DOMImplementationLS interface
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* by invoking its createDOMLSParser method.
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*/
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class PARSERS_EXPORT DOMLSParserImpl : public AbstractDOMParser,
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public DOMLSParser,
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public DOMConfiguration
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{
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public :
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// -----------------------------------------------------------------------
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// Constructors and Detructor
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// -----------------------------------------------------------------------
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/** @name Constructors and Destructor */
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//@{
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/** Construct a DOMLSParserImpl, with an optional validator
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*
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* Constructor with an instance of validator class to use for
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* validation. If you don't provide a validator, a default one will
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* be created for you in the scanner.
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*
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* @param valToAdopt Pointer to the validator instance to use. The
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* parser is responsible for freeing the memory.
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* @param manager The memory manager to be used for memory allocations
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* @param gramPool Pointer to the grammar pool instance from
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* external application.
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* The parser does NOT own it.
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*
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*/
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DOMLSParserImpl
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(
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XMLValidator* const valToAdopt = 0
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, MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager
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, XMLGrammarPool* const gramPool = 0
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);
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/**
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* Destructor
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*/
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virtual ~DOMLSParserImpl();
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//@}
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// -----------------------------------------------------------------------
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// Implementation of DOMLSParser interface
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// Getter methods
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// -----------------------------------------------------------------------
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/** @name Getter methods */
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//@{
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/**
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* @see DOMLSParser#getDomConfig
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*/
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virtual DOMConfiguration* getDomConfig();
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/**
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* @see DOMLSParser#getFilter
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*/
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virtual const DOMLSParserFilter* getFilter() const;
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/**
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* @see DOMLSParser#getAsync
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*/
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virtual bool getAsync() const;
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/**
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* @see DOMLSParser#getBusy
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*/
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virtual bool getBusy() const;
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//@}
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// -----------------------------------------------------------------------
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// Setter methods
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// -----------------------------------------------------------------------
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/** @name Setter methods */
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//@{
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/**
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* @see DOMLSParser#setFilter
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*/
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virtual void setFilter(DOMLSParserFilter* const filter);
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//@}
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// -----------------------------------------------------------------------
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// Parsing methods
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// -----------------------------------------------------------------------
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/** @name Parsing methods */
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//@{
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// -----------------------------------------------------------------------
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// Parsing methods
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// -----------------------------------------------------------------------
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/**
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* @see DOMLSParser#parse
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*/
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virtual DOMDocument* parse(const DOMLSInput* source);
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/**
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* @see DOMLSParser#parseURI
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*/
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virtual DOMDocument* parseURI(const XMLCh* const uri);
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/**
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* @see DOMLSParser#parseURI
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*/
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virtual DOMDocument* parseURI(const char* const uri);
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/**
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* @see DOMLSParser#parseWithContext
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*/
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virtual void parseWithContext
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(
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const DOMLSInput* source
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, DOMNode* contextNode
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, const ActionType action
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);
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/**
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* @see DOMLSParser#abort
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*/
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virtual void abort();
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// -----------------------------------------------------------------------
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// Non-standard Extension
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// -----------------------------------------------------------------------
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/** @name Non-standard Extension */
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//@{
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/**
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* Called to indicate that this DOMLSParser is no longer in use
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* and that the implementation may relinquish any resources associated with it.
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*
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*/
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virtual void release();
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/** Reset the documents vector pool and release all the associated memory
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* back to the system.
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*
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* When parsing a document using a DOM parser, all memory allocated
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* for a DOM tree is associated to the DOM document.
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*
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* If you do multiple parse using the same DOM parser instance, then
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* multiple DOM documents will be generated and saved in a vector pool.
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* All these documents (and thus all the allocated memory)
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* won't be deleted until the parser instance is destroyed.
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*
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* If you don't need these DOM documents anymore and don't want to
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* destroy the DOM parser instance at this moment, then you can call this method
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* to reset the document vector pool and release all the allocated memory
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* back to the system.
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*
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* It is an error to call this method if you are in the middle of a
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* parse (e.g. in the mid of a progressive parse).
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*
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* @exception IOException An exception from the parser if this function
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* is called when a parse is in progress.
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*
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*/
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virtual void resetDocumentPool();
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/**
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* Preparse schema grammar (XML Schema, DTD, etc.) via an input source
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* object.
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*
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* This method invokes the preparsing process on a schema grammar XML
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* file specified by the DOMLSInput parameter. If the 'toCache' flag
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* is enabled, the parser will cache the grammars for re-use. If a grammar
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* key is found in the pool, no caching of any grammar will take place.
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*
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* @param source A const reference to the DOMLSInput object which
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* points to the schema grammar file to be preparsed.
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* @param grammarType The grammar type (Schema or DTD).
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* @param toCache If <code>true</code>, we cache the preparsed grammar,
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* otherwise, no chaching. Default is <code>false</code>.
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* @return The preparsed schema grammar object (SchemaGrammar or
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* DTDGrammar). That grammar object is owned by the parser.
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*
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* @exception SAXException Any SAX exception, possibly
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* wrapping another exception.
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* @exception XMLException An exception from the parser or client
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* handler code.
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* @exception DOMException A DOM exception as per DOM spec.
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*
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* @see DOMLSInput#DOMLSInput
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*/
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virtual Grammar* loadGrammar(const DOMLSInput* source,
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const Grammar::GrammarType grammarType,
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const bool toCache = false);
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/**
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* Preparse schema grammar (XML Schema, DTD, etc.) via a file path or URL
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*
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* This method invokes the preparsing process on a schema grammar XML
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* file specified by the file path parameter. If the 'toCache' flag
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* is enabled, the parser will cache the grammars for re-use. If a grammar
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* key is found in the pool, no caching of any grammar will take place.
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*
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* @param systemId A const XMLCh pointer to the Unicode string which
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* contains the path to the XML grammar file to be
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* preparsed.
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* @param grammarType The grammar type (Schema or DTD).
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* @param toCache If <code>true</code>, we cache the preparsed grammar,
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* otherwise, no chaching. Default is <code>false</code>.
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* @return The preparsed schema grammar object (SchemaGrammar or
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* DTDGrammar). That grammar object is owned by the parser.
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*
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* @exception SAXException Any SAX exception, possibly
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* wrapping another exception.
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* @exception XMLException An exception from the parser or client
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* handler code.
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* @exception DOMException A DOM exception as per DOM spec.
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*/
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virtual Grammar* loadGrammar(const XMLCh* const systemId,
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const Grammar::GrammarType grammarType,
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const bool toCache = false);
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/**
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* Preparse schema grammar (XML Schema, DTD, etc.) via a file path or URL
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*
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* This method invokes the preparsing process on a schema grammar XML
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* file specified by the file path parameter. If the 'toCache' flag
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* is enabled, the parser will cache the grammars for re-use. If a grammar
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* key is found in the pool, no caching of any grammar will take place.
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*
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* @param systemId A const char pointer to a native string which contains
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* the path to the XML grammar file to be preparsed.
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* @param grammarType The grammar type (Schema or DTD).
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* @param toCache If <code>true</code>, we cache the preparsed grammar,
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* otherwise, no chaching. Default is <code>false</code>.
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* @return The preparsed schema grammar object (SchemaGrammar or
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* DTDGrammar). That grammar object is owned by the parser.
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*
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* @exception SAXException Any SAX exception, possibly
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* wrapping another exception.
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* @exception XMLException An exception from the parser or client
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* handler code.
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* @exception DOMException A DOM exception as per DOM spec.
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*/
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virtual Grammar* loadGrammar(const char* const systemId,
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const Grammar::GrammarType grammarType,
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const bool toCache = false);
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/**
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* Retrieve the grammar that is associated with the specified namespace key
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*
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* @param nameSpaceKey Namespace key
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* @return Grammar associated with the Namespace key.
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*/
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virtual Grammar* getGrammar(const XMLCh* const nameSpaceKey) const;
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/**
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* Retrieve the grammar where the root element is declared.
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*
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* @return Grammar where root element declared
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*/
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virtual Grammar* getRootGrammar() const;
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/**
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* Returns the string corresponding to a URI id from the URI string pool.
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*
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* @param uriId id of the string in the URI string pool.
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* @return URI string corresponding to the URI id.
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*/
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virtual const XMLCh* getURIText(unsigned int uriId) const;
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/**
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* Clear the cached grammar pool
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*/
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virtual void resetCachedGrammarPool();
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/**
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* Returns the current src offset within the input source.
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* To be used only while parsing is in progress.
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*
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* @return offset within the input source
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*/
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virtual XMLFilePos getSrcOffset() const;
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//@}
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// -----------------------------------------------------------------------
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// Implementation of the DOMConfiguration interface.
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// -----------------------------------------------------------------------
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/** @name Implementation of the DOMConfiguration interface. */
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//@{
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/**
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* Set the value of a parameter.
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*
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* @param name The name of the parameter to set.
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* @param value The new value or null if the user wishes to unset the
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* parameter. While the type of the value parameter is defined as
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* <code>DOMUserData</code>, the object type must match the type defined
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* by the definition of the parameter. For example, if the parameter is
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* "error-handler", the value must be of type <code>DOMErrorHandler</code>
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*
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* @exception DOMException (NOT_SUPPORTED_ERR) Raised when the
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* parameter name is recognized but the requested value cannot be set.
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* @exception DOMException (NOT_FOUND_ERR) Raised when the
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* parameter name is not recognized.
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*
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* @since DOM level 3
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**/
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virtual void setParameter(const XMLCh* name, const void* value);
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virtual void setParameter(const XMLCh* name, bool value);
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/**
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* Return the value of a parameter if known.
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*
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* @param name The name of the parameter.
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* @return The current object associated with the specified parameter or
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* null if no object has been associated or if the parameter is not
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* supported.
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*
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* @exception DOMException (NOT_FOUND_ERR) Raised when the i
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* boolean parameter
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* name is not recognized.
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*
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* @since DOM level 3
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**/
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virtual const void* getParameter(const XMLCh* name) const;
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/**
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* Check if setting a parameter to a specific value is supported.
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*
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* @param name The name of the parameter to check.
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* @param value An object. if null, the returned value is true.
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* @return true if the parameter could be successfully set to the specified
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* value, or false if the parameter is not recognized or the requested value
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* is not supported. This does not change the current value of the parameter
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* itself.
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*
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* @since DOM level 3
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**/
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virtual bool canSetParameter(const XMLCh* name, const void* value) const;
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virtual bool canSetParameter(const XMLCh* name, bool value) const;
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/**
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* The list of the parameters supported by this DOMConfiguration object and
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* for which at least one value can be set by the application.
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* Note that this list can also contain parameter names defined outside this specification.
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*
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* @return The list of parameters that can be used with setParameter/getParameter
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* @since DOM level 3
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**/
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virtual const DOMStringList* getParameterNames() const;
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//@}
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// -----------------------------------------------------------------------
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// Implementation of the XMLErrorReporter interface.
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// -----------------------------------------------------------------------
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/** @name Implementation of the XMLErrorReporter interface. */
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//@{
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/** Handle errors reported from the parser
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*
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* This method is used to report back errors found while parsing the
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* XML file. This method is also borrowed from the SAX specification.
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* It calls the corresponding user installed Error Handler method:
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* 'fatal', 'error', 'warning' depending on the severity of the error.
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* This classification is defined by the XML specification.
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*
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* @param errCode An integer code for the error.
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* @param msgDomain A const pointer to an Unicode string representing
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* the message domain to use.
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* @param errType An enumeration classifying the severity of the error.
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* @param errorText A const pointer to an Unicode string representing
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* the text of the error message.
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* @param systemId A const pointer to an Unicode string representing
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* the system id of the XML file where this error
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* was discovered.
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* @param publicId A const pointer to an Unicode string representing
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* the public id of the XML file where this error
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* was discovered.
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* @param lineNum The line number where the error occurred.
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* @param colNum The column number where the error occurred.
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* @see DOMErrorHandler
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*/
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virtual void error
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(
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const unsigned int errCode
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, const XMLCh* const msgDomain
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, const XMLErrorReporter::ErrTypes errType
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, const XMLCh* const errorText
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, const XMLCh* const systemId
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, const XMLCh* const publicId
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, const XMLFileLoc lineNum
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, const XMLFileLoc colNum
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);
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/** Reset any error data before a new parse
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*
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* This method allows the user installed Error Handler callback to
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* 'reset' itself.
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*
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* <b><font color="#FF0000">This method is a no-op for this DOM
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* implementation.</font></b>
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*/
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virtual void resetErrors();
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//@}
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// -----------------------------------------------------------------------
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// Implementation of the XMLEntityHandler interface.
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// -----------------------------------------------------------------------
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/** @name Implementation of the XMLEntityHandler interface. */
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//@{
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/** Handle an end of input source event
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*
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* This method is used to indicate the end of parsing of an external
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* entity file.
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*
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* <b><font color="#FF0000">This method is a no-op for this DOM
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* implementation.</font></b>
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*
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* @param inputSource A const reference to the InputSource object
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* which points to the XML file being parsed.
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* @see InputSource
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*/
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virtual void endInputSource(const InputSource& inputSource);
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/** Expand a system id
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*
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* This method allows an installed XMLEntityHandler to further
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* process any system id's of enternal entities encountered in
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* the XML file being parsed, such as redirection etc.
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*
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* <b><font color="#FF0000">This method always returns 'false'
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* for this DOM implementation.</font></b>
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*
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* @param systemId A const pointer to an Unicode string representing
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* the system id scanned by the parser.
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* @param toFill A pointer to a buffer in which the application
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* processed system id is stored.
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* @return 'true', if any processing is done, 'false' otherwise.
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*/
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virtual bool expandSystemId
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(
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const XMLCh* const systemId
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, XMLBuffer& toFill
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);
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/** Reset any entity handler information
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*
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* This method allows the installed XMLEntityHandler to reset
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* itself.
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*
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* <b><font color="#FF0000">This method is a no-op for this DOM
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* implementation.</font></b>
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*/
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virtual void resetEntities();
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/** Resolve a public/system id
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*
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* This method allows a user installed entity handler to further
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* process any pointers to external entities. The applications can
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* implement 'redirection' via this callback.
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*
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* @param resourceIdentifier An object containing the type of
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* resource to be resolved and the associated data members
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* corresponding to this type.
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* @return The value returned by the user installed resolveEntity
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* method or NULL otherwise to indicate no processing was done.
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* The returned InputSource is owned by the parser which is
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* responsible to clean up the memory.
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* @see XMLEntityHandler
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* @see XMLEntityResolver
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*/
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virtual InputSource* resolveEntity
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(
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XMLResourceIdentifier* resourceIdentifier
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);
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/** Handle a 'start input source' event
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*
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* This method is used to indicate the start of parsing an external
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* entity file.
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*
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* <b><font color="#FF0000">This method is a no-op for this DOM parse
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* implementation.</font></b>
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*
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* @param inputSource A const reference to the InputSource object
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* which points to the external entity
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* being parsed.
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*/
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virtual void startInputSource(const InputSource& inputSource);
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//@}
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// -----------------------------------------------------------------------
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// Implementation of the XMLDocumentHandler interface.
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// -----------------------------------------------------------------------
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virtual void docCharacters
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(
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const XMLCh* const chars
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|
, const XMLSize_t length
|
|
, const bool cdataSection
|
|
);
|
|
virtual void docComment
|
|
(
|
|
const XMLCh* const comment
|
|
);
|
|
virtual void docPI
|
|
(
|
|
const XMLCh* const target
|
|
, const XMLCh* const data
|
|
);
|
|
virtual void endElement
|
|
(
|
|
const XMLElementDecl& elemDecl
|
|
, const unsigned int urlId
|
|
, const bool isRoot
|
|
, const XMLCh* const elemPrefix
|
|
);
|
|
virtual void startElement
|
|
(
|
|
const XMLElementDecl& elemDecl
|
|
, const unsigned int urlId
|
|
, const XMLCh* const elemPrefix
|
|
, const RefVectorOf<XMLAttr>& attrList
|
|
, const XMLSize_t attrCount
|
|
, const bool isEmpty
|
|
, const bool isRoot
|
|
);
|
|
|
|
|
|
private :
|
|
// -----------------------------------------------------------------------
|
|
// Initialize/Cleanup methods
|
|
// -----------------------------------------------------------------------
|
|
void resetParse();
|
|
|
|
// -----------------------------------------------------------------------
|
|
// Private data members
|
|
//
|
|
// fEntityResolver
|
|
// The installed DOM entity resolver, if any. Null if none.
|
|
//
|
|
// fXMLEntityResolver
|
|
// The installed Xerces entity resolver, if any. Null if none.
|
|
//
|
|
// fErrorHandler
|
|
// The installed DOM error handler, if any. Null if none.
|
|
//
|
|
// fFilter
|
|
// The installed application filter, if any. Null if none.
|
|
//
|
|
// fCharsetOverridesXMLEncoding
|
|
// Indicates if the "charset-overrides-xml-encoding" is set or not
|
|
//
|
|
// fUserAdoptsDocument
|
|
// The DOMDocument ownership has been transferred to application
|
|
// If set to true, the parser does not own the document anymore
|
|
// and thus will not release its memory.
|
|
//
|
|
// fSupportedParameters
|
|
// A list of the parameters that can be set, including the ones
|
|
// specific of Xerces
|
|
//
|
|
//-----------------------------------------------------------------------
|
|
DOMLSResourceResolver* fEntityResolver;
|
|
XMLEntityResolver* fXMLEntityResolver;
|
|
DOMErrorHandler* fErrorHandler;
|
|
DOMLSParserFilter* fFilter;
|
|
bool fCharsetOverridesXMLEncoding;
|
|
bool fUserAdoptsDocument;
|
|
DOMStringListImpl* fSupportedParameters;
|
|
|
|
// -----------------------------------------------------------------------
|
|
// Unimplemented constructors and operators
|
|
// -----------------------------------------------------------------------
|
|
DOMLSParserImpl(const DOMLSParserImpl &);
|
|
DOMLSParserImpl & operator = (const DOMLSParserImpl &);
|
|
};
|
|
|
|
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// DOMLSParserImpl: Handlers for the XMLEntityHandler interface
|
|
// ---------------------------------------------------------------------------
|
|
inline void DOMLSParserImpl::endInputSource(const InputSource&)
|
|
{
|
|
// The DOM entity resolver doesn't handle this
|
|
}
|
|
|
|
inline bool DOMLSParserImpl::expandSystemId(const XMLCh* const, XMLBuffer&)
|
|
{
|
|
// The DOM entity resolver doesn't handle this
|
|
return false;
|
|
}
|
|
|
|
inline void DOMLSParserImpl::resetEntities()
|
|
{
|
|
// Nothing to do on this one
|
|
}
|
|
|
|
inline void DOMLSParserImpl::startInputSource(const InputSource&)
|
|
{
|
|
// The DOM entity resolver doesn't handle this
|
|
}
|
|
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// DOMLSParserImpl: Getter methods
|
|
// ---------------------------------------------------------------------------
|
|
inline DOMConfiguration* DOMLSParserImpl::getDomConfig()
|
|
{
|
|
return this;
|
|
}
|
|
|
|
inline bool DOMLSParserImpl::getAsync() const
|
|
{
|
|
// We are a synchronous parser
|
|
return false;
|
|
}
|
|
|
|
inline const DOMLSParserFilter* DOMLSParserImpl::getFilter() const
|
|
{
|
|
return fFilter;
|
|
}
|
|
|
|
|
|
XERCES_CPP_NAMESPACE_END
|
|
|
|
#endif
|