blob: e554b57ff924d42cdaa011638561949d7aa40dc7 [file] [log] [blame]
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache\@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation, and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.ibm.com . For more information
* on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
/*
* $Log$
* Revision 1.2 2002/02/20 18:17:01 tng
* [Bug 5977] Warnings on generating apiDocs.
*
* Revision 1.1.1.1 2002/02/01 22:22:07 peiyongz
* sane_include
*
* Revision 1.22 2001/12/05 22:09:02 tng
* Update documentation for setExternalSchemaLocation and setExternalNoNamespaceSchemaLocation.
*
* Revision 1.21 2001/11/20 18:51:44 tng
* Schema: schemaLocation and noNamespaceSchemaLocation to be specified outside the instance document. New methods setExternalSchemaLocation and setExternalNoNamespaceSchemaLocation are added (for SAX2, two new properties are added).
*
* Revision 1.20 2001/08/01 19:11:02 tng
* Add full schema constraint checking flag to the samples and the parser.
*
* Revision 1.19 2001/07/27 20:24:21 tng
* put getScanner() back as they were there before, not to break existing apps.
*
* Revision 1.18 2001/07/16 12:52:09 tng
* APIDocs fix: default for schema processing in DOMParser, IDOMParser, and SAXParser should be false.
*
* Revision 1.17 2001/06/23 14:13:16 tng
* Remove getScanner from the Parser headers as this is not needed and Scanner is not internal class.
*
* Revision 1.16 2001/06/03 19:26:20 jberry
* Add support for querying error count following parse; enables simple parse without requiring error handler.
*
* Revision 1.15 2001/05/11 13:26:22 tng
* Copyright update.
*
* Revision 1.14 2001/05/03 19:09:25 knoaman
* Support Warning/Error/FatalError messaging.
* Validity constraints errors are treated as errors, with the ability by user to set
* validity constraints as fatal errors.
*
* Revision 1.13 2001/03/30 16:46:57 tng
* Schema: Use setDoSchema instead of setSchemaValidation which makes more sense.
*
* Revision 1.12 2001/03/21 21:56:09 tng
* Schema: Add Schema Grammar, Schema Validator, and split the DTDValidator into DTDValidator, DTDScanner, and DTDGrammar.
*
* Revision 1.11 2001/02/15 15:56:29 tng
* Schema: Add setSchemaValidation and getSchemaValidation for DOMParser and SAXParser.
* Add feature "http://apache.org/xml/features/validation/schema" for SAX2XMLReader.
* New data field fSchemaValidation in XMLScanner as the flag.
*
* Revision 1.10 2001/01/12 21:23:41 tng
* Documentation Enhancement: explain values of Val_Scheme
*
* Revision 1.9 2000/08/02 18:05:15 jpolast
* changes required for sax2
* (changed private members to protected)
*
* Revision 1.8 2000/04/12 22:58:30 roddey
* Added support for 'auto validate' mode.
*
* Revision 1.7 2000/03/03 01:29:34 roddey
* Added a scanReset()/parseReset() method to the scanner and
* parsers, to allow for reset after early exit from a progressive parse.
* Added calls to new Terminate() call to all of the samples. Improved
* documentation in SAX and DOM parsers.
*
* Revision 1.6 2000/02/17 03:54:27 rahulj
* Added some new getters to query the parser state and
* clarified the documentation.
*
* Revision 1.5 2000/02/16 03:42:58 rahulj
* Finished documenting the SAX Driver implementation.
*
* Revision 1.4 2000/02/15 04:47:37 rahulj
* Documenting the SAXParser framework. Not done yet.
*
* Revision 1.3 2000/02/06 07:47:56 rahulj
* Year 2K copyright swat.
*
* Revision 1.2 1999/12/15 19:57:48 roddey
* Got rid of redundant 'const' on boolean return value. Some compilers choke
* on this and its useless.
*
* Revision 1.1.1.1 1999/11/09 01:07:51 twl
* Initial checkin
*
* Revision 1.6 1999/11/08 20:44:54 rahul
* Swat for adding in Product name and CVS comment log variable.
*
*/
#if !defined(SAXPARSER_HPP)
#define SAXPARSER_HPP
#include <xercesc/sax/Parser.hpp>
#include <xercesc/internal/VecAttrListImpl.hpp>
#include <xercesc/framework/XMLDocumentHandler.hpp>
#include <xercesc/framework/XMLElementDecl.hpp>
#include <xercesc/framework/XMLEntityHandler.hpp>
#include <xercesc/framework/XMLErrorReporter.hpp>
#include <xercesc/validators/DTD/DocTypeHandler.hpp>
class DocumentHandler;
class EntityResolver;
class XMLPScanToken;
class XMLScanner;
class XMLValidator;
/**
* This class implements the SAX 'Parser' interface and should be
* used by applications wishing to parse the XML files using SAX.
* It allows the client program to install SAX handlers for event
* callbacks.
*
* <p>It can be used to instantiate a validating or non-validating
* parser, by setting a member flag.</p>
*/
class PARSERS_EXPORT SAXParser :
public Parser
, public XMLDocumentHandler
, public XMLErrorReporter
, public XMLEntityHandler
, public DocTypeHandler
{
public :
// -----------------------------------------------------------------------
// Class types
// -----------------------------------------------------------------------
enum ValSchemes
{
Val_Never
, Val_Always
, Val_Auto
};
// -----------------------------------------------------------------------
// Constructors and Destructor
// -----------------------------------------------------------------------
/** @name Constructors and Destructor */
//@{
/** Constructor with an instance of validator class to use for
* validation.
* @param valToAdopt Pointer to the validator instance to use. The
* parser is responsible for freeing the memory.
*/
SAXParser(XMLValidator* const valToAdopt = 0);
/**
* Destructor
*/
~SAXParser();
//@}
/** @name Getter methods */
//@{
/**
* This method returns the installed document handler. Suitable
* for 'lvalue' usages.
*
* @return The pointer to the installed document handler object.
*/
DocumentHandler* getDocumentHandler();
/**
* This method returns the installed document handler. Suitable
* only for 'rvalue' usages.
*
* @return A const pointer to the installed document handler object.
*/
const DocumentHandler* getDocumentHandler() const;
/**
* This method returns the installed entity resolver. Suitable
* for 'lvalue' usages.
*
* @return The pointer to the installed entity resolver object.
*/
EntityResolver* getEntityResolver();
/**
* This method returns the installed entity resolver. Suitable
* for 'rvalue' usages.
*
* @return A const pointer to the installed entity resolver object.
*/
const EntityResolver* getEntityResolver() const;
/**
* This method returns the installed error handler. Suitable
* for 'lvalue' usages.
*
* @return The pointer to the installed error handler object.
*/
ErrorHandler* getErrorHandler();
/**
* This method returns the installed error handler. Suitable
* for 'rvalue' usages.
*
* @return A const pointer to the installed error handler object.
*/
const ErrorHandler* getErrorHandler() const;
/**
* This method returns a reference to the underlying scanner object.
* It allows read only access to data maintained in the scanner.
*
* @return A const reference to the underlying scanner object.
*/
const XMLScanner& getScanner() const;
/**
* This method returns a reference to the parser's installed
* validator.
*
* @return A const reference to the installed validator object.
*/
const XMLValidator& getValidator() const;
/**
* This method returns an enumerated value that indicates the current
* validation scheme set on this parser.
*
* @return The ValSchemes value current set on this parser.
* @see #setValidationScheme
*/
ValSchemes getValidationScheme() const;
/** Get the 'do schema' flag
*
* This method returns the state of the parser's schema processing
* flag.
*
* @return true, if the parser is currently configured to
* understand schema, false otherwise.
*
* @see #setDoSchema
*/
bool getDoSchema() const;
/** Get the 'full schema constraint checking' flag
*
* This method returns the state of the parser's full schema constraint
* checking flag.
*
* @return true, if the parser is currently configured to
* have full schema constraint checking, false otherwise.
*
* @see #setValidationSchemaFullChecking
*/
bool getValidationSchemaFullChecking() const;
/** Get error count from the last parse operation.
*
* This method returns the error count from the last parse
* operation. Note that this count is actually stored in the
* scanner, so this method simply returns what the
* scanner reports.
*
* @return number of errors encountered during the latest
* parse operation.
*/
int getErrorCount() const;
/**
* This method returns the state of the parser's namespace
* handling capability.
*
* @return true, if the parser is currently configured to
* understand namespaces, false otherwise.
*
* @see #setDoNamespaces
*/
bool getDoNamespaces() const;
/**
* This method returns the state of the parser's
* exit-on-First-Fatal-Error flag.
*
* @return true, if the parser is currently configured to
* exit on the first fatal error, false otherwise.
*
* @see #setExitOnFirstFatalError
*/
bool getExitOnFirstFatalError() const;
/**
* This method returns the state of the parser's
* validation-constraint-fatal flag.
*
* @return true, if the parser is currently configured to
* set validation constraint errors as fatal, false
* otherwise.
*
* @see #setValidationContraintFatal
*/
bool getValidationConstraintFatal() const;
/** Get the set of Namespace/SchemaLocation that is specified externaly.
*
* This method returns the list of Namespace/SchemaLocation that was
* specified using setExternalSchemaLocation.
*
* The parser owns the returned string, and the memory allocated for
* the returned string will be destroyed when the parser is deleted.
*
* To ensure assessiblity of the returned information after the parser
* is deleted, callers need to copy and store the returned information
* somewhere else.
*
* @return a pointer to the list of Namespace/SchemaLocation that was
* specified externally. The pointer spans the same life-time as
* the parser. A null pointer is returned if nothing
* was specified externally.
*
* @see #setExternalSchemaLocation(const XMLCh* const)
*/
XMLCh* getExternalSchemaLocation() const;
/** Get the noNamespace SchemaLocation that is specified externaly.
*
* This method returns the no target namespace XML Schema Location
* that was specified using setExternalNoNamespaceSchemaLocation.
*
* The parser owns the returned string, and the memory allocated for
* the returned string will be destroyed when the parser is deleted.
*
* To ensure assessiblity of the returned information after the parser
* is deleted, callers need to copy and store the returned information
* somewhere else.
*
* @return a pointer to the no target namespace Schema Location that was
* specified externally. The pointer spans the same life-time as
* the parser. A null pointer is returned if nothing
* was specified externally.
*
* @see #setExternalNoNamespaceSchemaLocation(const XMLCh* const)
*/
XMLCh* getExternalNoNamespaceSchemaLocation() const;
//@}
// -----------------------------------------------------------------------
// Setter methods
// -----------------------------------------------------------------------
/** @name Setter methods */
//@{
/**
* This method allows users to enable or disable the parser's
* namespace processing. When set to true, parser starts enforcing
* all the constraints / rules specified by the NameSpace
* specification.
*
* <p>The parser's default state is: false.</p>
*
* <p>This flag is ignored by the underlying scanner if the installed
* validator indicates that namespace constraints should be
* enforced.</p>
*
* @param newState The value specifying whether NameSpace rules should
* be enforced or not.
*
* @see #getDoNamespaces
*/
void setDoNamespaces(const bool newState);
/**
* This method allows users to set the validation scheme to be used
* by this parser. The value is one of the ValSchemes enumerated values
* defined by this class:
*
* <br> Val_Never - turn off validation
* <br> Val_Always - turn on validation
* <br> Val_Auto - turn on validation if any internal/external
* DTD subset have been seen
*
* <p>The parser's default state is: Val_Auto.</p>
*
* @param newScheme The new validation scheme to use.
*
* @see #getValidationScheme
*/
void setValidationScheme(const ValSchemes newScheme);
/** Set the 'schema support' flag
*
* This method allows users to enable or disable the parser's
* schema processing. When set to false, parser will not process
* any schema found.
*
* The parser's default state is: false.
*
* @param newState The value specifying whether schema support should
* be enforced or not.
*
* @see #getDoSchema
*/
void setDoSchema(const bool newState);
/**
* This method allows the user to turn full Schema constraint checking on/off.
* Only takes effect if Schema validation is enabled.
* If turned off, partial constraint checking is done.
*
* Full schema constraint checking includes those checking that may
* be time-consuming or memory intensive. Currently, particle unique
* attribution constraint checking and particle derivation resriction checking
* are controlled by this option.
*
* The parser's default state is: false.
*
* @param schemaFullChecking True to turn on full schema constraint checking.
*
* @see #getValidationSchemaFullChecking
*/
void setValidationSchemaFullChecking(const bool schemaFullChecking);
/**
* This method allows users to set the parser's behaviour when it
* encounters the first fatal error. If set to true, the parser
* will exit at the first fatal error. If false, then it will
* report the error and continue processing.
*
* <p>The default value is 'true' and the parser exits on the
* first fatal error.</p>
*
* @param newState The value specifying whether the parser should
* continue or exit when it encounters the first
* fatal error.
*
* @see #getExitOnFirstFatalError
*/
void setExitOnFirstFatalError(const bool newState);
/**
* This method allows users to set the parser's behaviour when it
* encounters a validtion constraint error. If set to true, and the
* the parser is set to exit when it encounter the first fatal error,
* the parser will exit at the first encounter. If false, then it will
* report the error and continue processing.
*
* <p>The default value is 'false'.</p>
*
* @param newState The value specifying whether the parser should
* continue or exit when it encounters a validation
* constraint error.
*
* @see #getValidationConstraintFatal
*/
void setValidationConstraintFatal(const bool newState);
/**
* This method allows the user to specify a list of schemas to use.
* If the targetNamespace of a schema specified using this method matches
* the targetNamespace of a schema occuring in the instance document in
* the schemaLocation attribute, or if the targetNamespace matches the
* namespace attribute of the "import" element, the schema specified by the
* user using this method will be used (i.e., the schemaLocation attribute
* in the instance document or on the "import" element will be effectively ignored).
*
* If this method is called more than once, only the last one takes effect.
*
* The syntax is the same as for schemaLocation attributes in instance
* documents: e.g, "http://www.example.com file_name.xsd". The user can
* specify more than one XML Schema in the list.
*
* @param schemaLocation the list of schemas to use
*
* @see #getExternalSchemaLocation
*/
void setExternalSchemaLocation(const XMLCh* const schemaLocation);
/**
* This method is same as setExternalSchemaLocation(const XMLCh* const).
* It takes native char string as parameter
*
* @param schemaLocation the list of schemas to use
*
* @see #setExternalSchemaLocation(const XMLCh* const)
*/
void setExternalSchemaLocation(const char* const schemaLocation);
/**
* This method allows the user to specify the no target namespace XML
* Schema Location externally. If specified, the instance document's
* noNamespaceSchemaLocation attribute will be effectively ignored.
*
* If this method is called more than once, only the last one takes effect.
*
* The syntax is the same as for the noNamespaceSchemaLocation attribute
* that may occur in an instance document: e.g."file_name.xsd".
*
* @param noNamespaceSchemaLocation the XML Schema Location with no target namespace
*
* @see #getExternalNoNamespaceSchemaLocation
*/
void setExternalNoNamespaceSchemaLocation(const XMLCh* const noNamespaceSchemaLocation);
/**
* This method is same as setExternalNoNamespaceSchemaLocation(const XMLCh* const).
* It takes native char string as parameter
*
* @param noNamespaceSchemaLocation the XML Schema Location with no target namespace
*
* @see #setExternalNoNamespaceSchemaLocation(const XMLCh* const)
*/
void setExternalNoNamespaceSchemaLocation(const char* const noNamespaceSchemaLocation);
//@}
// -----------------------------------------------------------------------
// Advanced document handler list maintenance methods
// -----------------------------------------------------------------------
/** @name Advanced document handler list maintenance methods */
//@{
/**
* This method installs the specified 'advanced' document callback
* handler, thereby allowing the user to customize the processing,
* if they choose to do so. Any number of advanced callback handlers
* maybe installed.
*
* <p>The methods in the advanced callback interface represent
* Xerces-C extensions. There is no specification for this interface.</p>
*
* @param toInstall A pointer to the users advanced callback handler.
*
* @see #removeAdvDocHandler
*/
void installAdvDocHandler(XMLDocumentHandler* const toInstall);
/**
* This method removes the 'advanced' document handler callback from
* the underlying parser scanner. If no handler is installed, advanced
* callbacks are not invoked by the scanner.
* @param toRemove A pointer to the advanced callback handler which
* should be removed.
*
* @see #installAdvDocHandler
*/
bool removeAdvDocHandler(XMLDocumentHandler* const toRemove);
//@}
// -----------------------------------------------------------------------
// Implementation of the SAXParser interface
// -----------------------------------------------------------------------
/** @name Implementation of SAX 1.0 interface's. */
//@{
/**
* This method invokes the parsing process on the XML file specified
* by the InputSource parameter.
*
* @param source A const reference to the InputSource object which
* points to the XML file to be parsed.
* @param reuseGrammar The flag indicating whether the existing Grammar
* should be reused or not for this parsing run.
* If true, there cannot be any internal subset.
*
* @see Parser#parse(InputSource)
*/
virtual void parse(const InputSource& source, const bool reuseGrammar = false);
/**
* This method invokes the parsing process on the XML file specified by
* the Unicode string parameter 'systemId'.
*
* @param systemId A const XMLCh pointer to the Unicode string which
* contains the path to the XML file to be parsed.
* @param reuseGrammar The flag indicating whether the existing Grammar
* should be reused or not for this parsing run.
* If true, there cannot be any internal subset.
*
* @see Parser#parse(XMLCh*)
*/
virtual void parse(const XMLCh* const systemId, const bool reuseGrammar = false);
/**
* This method invokes the parsing process on the XML file specified by
* the native char* string parameter 'systemId'.
*
* @param systemId A const char pointer to a native string which
* contains the path to the XML file to be parsed.
* @param reuseGrammar The flag indicating whether the existing Grammar
* should be reused or not for this parsing run.
* If true, there cannot be any internal subset.
*/
virtual void parse(const char* const systemId, const bool reuseGrammar = false);
/**
* This method installs the user specified SAX Document Handler
* callback function on parser.
*
* @param handler A pointer to the document handler to be called
* when the parser comes across 'document' events
* as per the SAX specification.
*
* @see Parser#parse(char*)
*/
virtual void setDocumentHandler(DocumentHandler* const handler);
/**
* This method installs the user specified DTD handler on the parser.
*
* @param handler A pointer to the DTD handler to be called
* when the parser comes across 'DTD' events
* as per the SAX specification.
*
* @see Parser#setDTDHandler
*/
virtual void setDTDHandler(DTDHandler* const handler);
/**
* This method installs the user specified error handler on
* the parser.
*
* @param handler A pointer to the error handler to be called
* when the parser comes across 'error' events
* as per the SAX specification.
*
* @see Parser#setErrorHandler
*/
virtual void setErrorHandler(ErrorHandler* const handler);
/**
* This method installs the user specified entity resolver on the
* parser. It allows applications to trap and redirect calls to
* external entities.
*
* @param resolver A pointer to the entity resolver to be called
* when the parser comes across references to
* entities in the XML file.
*
* @see Parser#setEntityResolver
*/
virtual void setEntityResolver(EntityResolver* const resolver);
//@}
// -----------------------------------------------------------------------
// Progressive scan methods
// -----------------------------------------------------------------------
/** @name Progressive scan methods */
//@{
/** Begin a progressive parse operation
*
* This method is used to start a progressive parse on a XML file.
* To continue parsing, subsequent calls must be to the parseNext
* method.
*
* It scans through the prolog and returns a token to be used on
* subsequent scanNext() calls. If the return value is true, then the
* token is legal and ready for further use. If it returns false, then
* the scan of the prolog failed and the token is not going to work on
* subsequent scanNext() calls.
*
* @param systemId A pointer to a Unicode string represting the path
* to the XML file to be parsed.
* @param toFill A token maintaing state information to maintain
* internal consistency between invocation of 'parseNext'
* calls.
* @param reuseGrammar The flag indicating whether the existing Grammar
* should be reused or not for this parsing run.
* If true, there cannot be any internal subset.
*
* @return 'true', if successful in parsing the prolog. It indicates the
* user can go ahead with parsing the rest of the file. It
* returns 'false' to indicate that the parser could parse the
* prolog (which means the token will not be valid.)
*
* @see #parseNext
* @see #parseFirst(char*,...)
* @see #parseFirst(InputSource&,...)
*/
bool parseFirst
(
const XMLCh* const systemId
, XMLPScanToken& toFill
, const bool reuseGrammar = false
);
/** Begin a progressive parse operation
*
* This method is used to start a progressive parse on a XML file.
* To continue parsing, subsequent calls must be to the parseNext
* method.
*
* It scans through the prolog and returns a token to be used on
* subsequent scanNext() calls. If the return value is true, then the
* token is legal and ready for further use. If it returns false, then
* the scan of the prolog failed and the token is not going to work on
* subsequent scanNext() calls.
*
* @param systemId A pointer to a regular native string represting
* the path to the XML file to be parsed.
* @param toFill A token maintaing state information to maintain
* internal consIstency between invocation of 'parseNext'
* calls.
* @param reuseGrammar The flag indicating whether the existing Grammar
* should be reused or not for this parsing run.
* If true, there cannot be any internal subset.
*
* @return 'true', if successful in parsing the prolog. It indicates the
* user can go ahead with parsing the rest of the file. It
* returns 'false' to indicate that the parser could not parse
* the prolog.
*
* @see #parseNext
* @see #parseFirst(XMLCh*,...)
* @see #parseFirst(InputSource&,...)
*/
bool parseFirst
(
const char* const systemId
, XMLPScanToken& toFill
, const bool reuseGrammar = false
);
/** Begin a progressive parse operation
*
* This method is used to start a progressive parse on a XML file.
* To continue parsing, subsequent calls must be to the parseNext
* method.
*
* It scans through the prolog and returns a token to be used on
* subsequent scanNext() calls. If the return value is true, then the
* token is legal and ready for further use. If it returns false, then
* the scan of the prolog failed and the token is not going to work on
* subsequent scanNext() calls.
*
* @param source A const reference to the InputSource object which
* points to the XML file to be parsed.
* @param toFill A token maintaing state information to maintain
* internal consistency between invocation of 'parseNext'
* calls.
* @param reuseGrammar The flag indicating whether the existing Grammar
* should be reused or not for this parsing run.
* If true, there cannot be any internal subset.
*
* @return 'true', if successful in parsing the prolog. It indicates the
* user can go ahead with parsing the rest of the file. It
* returns 'false' to indicate that the parser could not parse
* the prolog.
*
* @see #parseNext
* @see #parseFirst(XMLCh*,...)
* @see #parseFirst(char*,...)
*/
bool parseFirst
(
const InputSource& source
, XMLPScanToken& toFill
, const bool reuseGrammar = false
);
/** Continue a progressive parse operation
*
* This method is used to continue with progressive parsing of
* XML files started by a call to 'parseFirst' method.
*
* It parses the XML file and stops as soon as it comes across
* a XML token (as defined in the XML specification). Relevant
* callback handlers are invoked as required by the SAX
* specification.
*
* @param token A token maintaing state information to maintain
* internal consistency between invocation of 'parseNext'
* calls.
*
* @return 'true', if successful in parsing the next XML token.
* It indicates the user can go ahead with parsing the rest
* of the file. It returns 'false' to indicate that the parser
* could not find next token as per the XML specification
* production rule.
*
* @see #parseFirst(XMLCh*,...)
* @see #parseFirst(char*,...)
* @see #parseFirst(InputSource&,...)
*/
bool parseNext(XMLPScanToken& token);
/** Reset the parser after a progressive parse
*
* If a progressive parse loop exits before the end of the document
* is reached, the parser has no way of knowing this. So it will leave
* open any files or sockets or memory buffers that were in use at
* the time that the parse loop exited.
*
* The next parse operation will cause these open files and such to
* be closed, but the next parse operation might occur at some unknown
* future point. To avoid this problem, you should reset the parser if
* you exit the loop early.
*
* If you exited because of an error, then this cleanup will be done
* for you. Its only when you exit the file prematurely of your own
* accord, because you've found what you wanted in the file most
* likely.
*
* @param token A token maintaing state information to maintain
* internal consistency between invocation of 'parseNext'
* calls.
*/
void parseReset(XMLPScanToken& token);
//@}
// -----------------------------------------------------------------------
// Implementation of the DocTypeHandler Interface
// -----------------------------------------------------------------------
/** @name Implementation of the DocTypeHandler Interface */
//@{
/**
* This method is used to report an attribute definition.
*
* <b><font color="#FF0000">This method is a no-op for this SAX
* driver implementation.</font></b>
*
* @param elemDecl A const reference to the object containing information
* about the element whose attribute definition was just
* parsed.
* @param attDef A const reference to the object containing information
* attribute definition.
* @param ignore The flag indicating whether this attribute definition
* was ignored by the parser or not.
*/
virtual void attDef
(
const DTDElementDecl& elemDecl
, const DTDAttDef& attDef
, const bool ignore
);
/**
* This method is used to report a comment occurring within the DTD.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param comment A const pointer to a Unicode string representing the
* text of the comment just parsed.
*/
virtual void doctypeComment
(
const XMLCh* const comment
);
/**
* This method is used to report the DOCTYPE declaration.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param elemDecl A const reference to the object containing information
* about the root element definition declaration of the
* XML document being parsed.
* @param publicId A const pointer to a Unicode string representing the
* public id of the DTD file.
* @param systemId A const pointer to a Unicode string representing the
* system id of the DTD file.
* @param hasIntSubset A flag indicating if this XML file contains any
* internal subset.
*/
virtual void doctypeDecl
(
const DTDElementDecl& elemDecl
, const XMLCh* const publicId
, const XMLCh* const systemId
, const bool hasIntSubset
);
/**
* This method is used to report any PI declarations
* occurring inside the DTD definition block.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param target A const pointer to a Unicode string representing the
* target of the PI declaration.
* @param data A const pointer to a Unicode string representing the
* data of the PI declaration. See the PI production rule
* in the XML specification for details.
*/
virtual void doctypePI
(
const XMLCh* const target
, const XMLCh* const data
);
/**
* This method is used to report any whitespaces
* occurring inside the DTD definition block.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param chars A const pointer to a Unicode string representing the
* whitespace characters.
* @param length The length of the whitespace Unicode string.
*/
virtual void doctypeWhitespace
(
const XMLCh* const chars
, const unsigned int length
);
/**
* This method is used to report an element declarations
* successfully scanned by the parser.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param decl A const reference to the object containing element
* declaration information.
* @param isIgnored The flag indicating whether this definition was
* ignored by the parser or not.
*/
virtual void elementDecl
(
const DTDElementDecl& decl
, const bool isIgnored
);
/**
* This method is used to report the end of an attribute
* list declaration for an element.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param elemDecl A const reference to the object containing element
* declaration information.
*/
virtual void endAttList
(
const DTDElementDecl& elemDecl
);
/**
* This method is used to report the end of the internal subset.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*/
virtual void endIntSubset();
/**
* This method is used to report the end of the external subset.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*/
virtual void endExtSubset();
/**
* This method is used to report any entity declarations.
* For unparsed entities, this driver will invoke the
* SAX DTDHandler::unparsedEntityDecl callback.
*
* @param entityDecl A const reference to the object containing
* the entity declaration information.
* @param isPEDecl The flag indicating whether this was a
* parameter entity declaration or not.
* @param isIgnored The flag indicating whether this definition
* was ignored by the parser or not.
*
* @see DTDHandler#unparsedEntityDecl
*/
virtual void entityDecl
(
const DTDEntityDecl& entityDecl
, const bool isPEDecl
, const bool isIgnored
);
/**
* This method allows the user installed DTD handler to
* reset itself.
*/
virtual void resetDocType();
/**
* This method is used to report any notation declarations.
* If there is a user installed DTDHandler, then the driver will
* invoke the SAX DTDHandler::notationDecl callback.
*
* @param notDecl A const reference to the object containing the notation
* declaration information.
* @param isIgnored The flag indicating whether this definition was ignored
* by the parser or not.
*
* @see DTDHandler#notationDecl
*/
virtual void notationDecl
(
const XMLNotationDecl& notDecl
, const bool isIgnored
);
/**
* This method is used to indicate the start of an element's attribute
* list declaration.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param elemDecl A const reference to the object containing element
* declaration information.
*/
virtual void startAttList
(
const DTDElementDecl& elemDecl
);
/**
* This method is used indicate the start of the internal subset.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*/
virtual void startIntSubset();
/**
* This method is used indicate the start of the external subset.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*/
virtual void startExtSubset();
/**
* This method is used to report the TextDecl. Refer to the XML
* specification for the syntax of a TextDecl.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param versionStr A const pointer to a Unicode string representing
* the version number of the 'version' clause.
* @param encodingStr A const pointer to a Unicode string representing
* the encoding name of the 'encoding' clause.
*/
virtual void TextDecl
(
const XMLCh* const versionStr
, const XMLCh* const encodingStr
);
//@}
// -----------------------------------------------------------------------
// Implementation of the XMLDocumentHandler interface
// -----------------------------------------------------------------------
/** @name Implementation of the XMLDocumentHandler Interface. */
//@{
/**
* This method is used to report all the characters scanned
* by the parser. The driver will invoke the 'characters'
* method of the user installed SAX Document Handler.
*
* <p>If any advanced callback handlers are installed, the
* corresponding 'docCharacters' method will also be invoked.</p>
*
* @param chars A const pointer to a Unicode string representing the
* character data.
* @param length The length of the Unicode string returned in 'chars'.
* @param cdataSection A flag indicating if the characters represent
* content from the CDATA section.
* @see DocumentHandler#characters
*/
virtual void docCharacters
(
const XMLCh* const chars
, const unsigned int length
, const bool cdataSection
);
/**
* This method is used to report any comments scanned by the parser.
* This method is a no-op unless, unless an advanced callback handler
* is installed, in which case the corresponding 'docComment' method
* is invoked.
*
* @param comment A const pointer to a null terminated Unicode
* string representing the comment text.
*/
virtual void docComment
(
const XMLCh* const comment
);
/**
* This method is used to report any PI scanned by the parser.
*
* <p>Any PI's occurring before any 'content' are not reported
* to any SAX handler as per the specification. However, all
* PI's within content are reported via the SAX Document Handler's
* 'processingInstruction' method.
*
* <p>If any advanced callback handlers are installed, the
* corresponding 'docPI' method will be invoked.</p>
*
* @param target A const pointer to a Unicode string representing the
* target of the PI declaration.
* @param data A const pointer to a Unicode string representing the
* data of the PI declaration. See the PI production rule
* in the XML specification for details.
*
* @see DocumentHandler#processingInstruction
*/
virtual void docPI
(
const XMLCh* const target
, const XMLCh* const data
);
/**
* This method is used to indicate the end of root element
* was just scanned by the parser. Corresponding 'endDocument'
* method of the user installed SAX Document Handler will also
* be invoked.
*
* <p>In addition, if any advanced callback handlers are installed,
* the corresponding 'endDocument' method is invoked.</p>
*
* @see DocumentHandler#endDocument
*/
virtual void endDocument();
/**
* This method is used to indicate the end tag of an element.
* The driver will invoke the corresponding 'endElement' method of
* the SAX Document Handler interface.
*
* <p>If any advanced callback handlers are installed, the
* corresponding 'endElement' method is also invoked.</p>
*
* @param elemDecl A const reference to the object containing element
* declaration information.
* @param urlId An id referring to the namespace prefix, if
* namespaces setting is switched on.
* @param isRoot A flag indicating whether this element was the
* root element.
* @see DocumentHandler#endElement
*/
virtual void endElement
(
const XMLElementDecl& elemDecl
, const unsigned int urlId
, const bool isRoot
);
/**
* This method is used to indicate that an end of an entity reference
* was just scanned.
*
* <p>If any advanced callback handlers are installed, the
* corresponding 'endEnityReference' method is invoked.</p>
*
* @param entDecl A const reference to the object containing the
* entity declaration information.
*/
virtual void endEntityReference
(
const XMLEntityDecl& entDecl
);
/**
* This method is used to report all the whitespace characters,
* which are determined to be 'ignorable'. This distinction
* between characters is only made, if validation is enabled.
* Corresponding 'ignorableWhitespace' method of the user installed
* SAX Document Handler interface is called.
*
* <p>Any whitespace before content is not reported to the SAX
* Document Handler method, as per the SAX specification.
* However, if any advanced callback handlers are installed, the
* corresponding 'ignorableWhitespace' method is invoked.</p>
*
* @param chars A const pointer to a Unicode string representing the
* ignorable whitespace character data.
* @param length The length of the Unicode string 'chars'.
* @param cdataSection A flag indicating if the characters represent
* content from the CDATA section.
* @see DocumentHandler#ignorableWhitespace
*/
virtual void ignorableWhitespace
(
const XMLCh* const chars
, const unsigned int length
, const bool cdataSection
);
/**
* This method allows the user installed Document Handler and
* any advanced callback handlers to 'reset' themselves.
*/
virtual void resetDocument();
/**
* This method is used to report the start of the parsing process.
* The corresponding user installed SAX Document Handler's method
* 'startDocument' is invoked.
*
* <p>If any advanced callback handlers are installed, then the
* corresponding 'startDocument' method is also called.</p>
*
* @see DocumentHandler#startDocument
*/
virtual void startDocument();
/**
* This method is used to report the start of an element. It is
* called at the end of the element, by which time all attributes
* specified are also parsed. The corresponding user installed
* SAX Document Handler's method 'startElement' is invoked.
*
* <p>If any advanced callback handlers are installed, then the
* corresponding 'startElement' method is also called.</p>
*
* @param elemDecl A const reference to the object containing element
* declaration information.
* @param urlId An id referring to the namespace prefix, if
* namespaces setting is switched on.
* @param elemPrefix A const pointer to a Unicode string containing
* the namespace prefix for this element. Applicable
* only when namespace processing is enabled.
* @param attrList A const reference to the object containing the
* list of attributes just scanned for this element.
* @param attrCount A count of number of attributes in the list
* specified by the parameter 'attrList'.
* @param isEmpty A flag indicating whether this is an empty element
* or not.
* @param isRoot A flag indicating whether this element was the
* root element.
* @see DocumentHandler#startElement
*/
virtual void startElement
(
const XMLElementDecl& elemDecl
, const unsigned int urlId
, const XMLCh* const elemPrefix
, const RefVectorOf<XMLAttr>& attrList
, const unsigned int attrCount
, const bool isEmpty
, const bool isRoot
);
/**
* This method is used to indicate the start of an entity reference.
*
* <p>If any advanced callback handlers are installed, the
* corresponding 'endEnityReference' method is invoked.</p>
*
* @param entDecl A const reference to the object containing the
* entity declaration information.
*/
virtual void startEntityReference
(
const XMLEntityDecl& entDecl
);
/**
* This method is used to report the XML decl scanned by the parser.
* Refer to the XML specification to see the meaning of parameters.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param versionStr A const pointer to a Unicode string representing
* version string value.
* @param encodingStr A const pointer to a Unicode string representing
* the encoding string value.
* @param standaloneStr A const pointer to a Unicode string
* representing the standalone string value.
* @param actualEncodingStr A const pointer to a Unicode string
* representing the actual encoding string
* value.
*/
virtual void XMLDecl
(
const XMLCh* const versionStr
, const XMLCh* const encodingStr
, const XMLCh* const standaloneStr
, const XMLCh* const actualEncodingStr
);
//@}
// -----------------------------------------------------------------------
// Implementation of the XMLErrorReporter interface
// -----------------------------------------------------------------------
/** @name Implementation of the XMLErrorReporter Interface. */
//@{
/**
* This method is used to report back errors found while parsing the
* XML file. The driver will call the corresponding user installed
* SAX Error Handler methods: 'fatal', 'error', 'warning' depending
* on the severity of the error. This classification is defined by
* the XML specification.
*
* @param errCode An integer code for the error.
* @param msgDomain A const pointer to an Unicode string representing
* the message domain to use.
* @param errType An enumeration classifying the severity of the error.
* @param errorText A const pointer to an Unicode string representing
* the text of the error message.
* @param systemId A const pointer to an Unicode string representing
* the system id of the XML file where this error
* was discovered.
* @param publicId A const pointer to an Unicode string representing
* the public id of the XML file where this error
* was discovered.
* @param lineNum The line number where the error occurred.
* @param colNum The column number where the error occurred.
* @see ErrorHandler
*/
virtual void error
(
const unsigned int errCode
, const XMLCh* const msgDomain
, const XMLErrorReporter::ErrTypes errType
, const XMLCh* const errorText
, const XMLCh* const systemId
, const XMLCh* const publicId
, const unsigned int lineNum
, const unsigned int colNum
);
/**
* This method allows the user installed Error Handler
* callback to 'reset' itself.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
*/
virtual void resetErrors();
//@}
// -----------------------------------------------------------------------
// Implementation of the XMLEntityHandler interface
// -----------------------------------------------------------------------
/** @name Implementation of the XMLEntityHandler Interface. */
//@{
/**
* This method is used to indicate the end of parsing of an external
* entity file.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param inputSource A const reference to the InputSource object
* which points to the XML file being parsed.
* @see InputSource
*/
virtual void endInputSource(const InputSource& inputSource);
/**
* This method allows an installed XMLEntityHandler to further
* process any system id's of enternal entities encountered in
* the XML file being parsed, such as redirection etc.
*
* <b><font color="#FF0000">This method always returns 'false'
* for this SAX driver implementation.</font></b>
*
* @param systemId A const pointer to an Unicode string representing
* the system id scanned by the parser.
* @param toFill A pointer to a buffer in which the application
* processed system id is stored.
* @return 'true', if any processing is done, 'false' otherwise.
*/
virtual bool expandSystemId
(
const XMLCh* const systemId
, XMLBuffer& toFill
);
/**
* This method allows the installed XMLEntityHandler to reset
* itself.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*/
virtual void resetEntities();
/**
* This method allows a user installed entity handler to further
* process any pointers to external entities. The applications
* can implement 'redirection' via this callback. The driver
* should call the SAX EntityHandler 'resolveEntity' method.
*
* @param publicId A const pointer to a Unicode string representing the
* public id of the entity just parsed.
* @param systemId A const pointer to a Unicode string representing the
* system id of the entity just parsed.
* @return The value returned by the SAX resolveEntity method or
* NULL otherwise to indicate no processing was done.
* @see EntityResolver
*/
virtual InputSource* resolveEntity
(
const XMLCh* const publicId
, const XMLCh* const systemId
);
/**
* This method is used to indicate the start of parsing an
* external entity file.
*
* <b><font color="#FF0000">This method is a no-op for this SAX driver
* implementation.</font></b>
*
* @param inputSource A const reference to the InputSource object
* which points to the external entity
* being parsed.
*/
virtual void startInputSource(const InputSource& inputSource);
//@}
/** @name Deprecated Methods */
//@{
/**
* This method returns the state of the parser's validation
* handling flag which controls whether validation checks
* are enforced or not.
*
* @return true, if the parser is currently configured to
* do validation, false otherwise.
*
* @see #setDoValidation
*/
bool getDoValidation() const;
/**
* This method allows users to enable or disable the parser's validation
* checks.
*
* <p>By default, the parser does not to any validation. The default
* value is false.</p>
*
* @param newState The value specifying whether the parser should
* do validity checks or not against the DTD in the
* input XML document.
*
* @see #getDoValidation
*/
void setDoValidation(const bool newState);
//@}
protected :
// -----------------------------------------------------------------------
// Unimplemented constructors and operators
// -----------------------------------------------------------------------
SAXParser(const SAXParser&);
void operator=(const SAXParser&);
// -----------------------------------------------------------------------
// Private data members
//
// fAttrList
// A temporary implementation of the basic SAX attribute list
// interface. We use this one over and over on each startElement
// event to allow SAX-like access to the element attributes.
//
// fDocHandler
// The installed SAX doc handler, if any. Null if none.
//
// fDTDHandler
// The installed SAX DTD handler, if any. Null if none.
//
// fElemDepth
// This is used to track the element nesting depth, so that we can
// know when we are inside content. This is so we can ignore char
// data outside of content.
//
// fEntityResolver
// The installed SAX entity handler, if any. Null if none.
//
// fErrorHandler
// The installed SAX error handler, if any. Null if none.
//
// fAdvDHCount
// fAdvDHList
// fAdvDHListSize
// This is an array of pointers to XMLDocumentHandlers, which is
// how we see installed advanced document handlers. There will
// usually not be very many at all, so a simple array is used
// instead of a collection, for performance. It will grow if needed,
// but that is unlikely.
//
// The count is how many handlers are currently installed. The size
// is how big the array itself is (for expansion purposes.) When
// count == size, is time to expand.
//
// fParseInProgress
// This flag is set once a parse starts. It is used to prevent
// multiple entrance or reentrance of the parser.
//
// fScanner
// The scanner being used by this parser. It is created internally
// during construction.
//
// -----------------------------------------------------------------------
VecAttrListImpl fAttrList;
DocumentHandler* fDocHandler;
DTDHandler* fDTDHandler;
unsigned int fElemDepth;
EntityResolver* fEntityResolver;
ErrorHandler* fErrorHandler;
unsigned int fAdvDHCount;
XMLDocumentHandler** fAdvDHList;
unsigned int fAdvDHListSize;
bool fParseInProgress;
XMLScanner* fScanner;
};
// ---------------------------------------------------------------------------
// SAXParser: Getter methods
// ---------------------------------------------------------------------------
inline DocumentHandler* SAXParser::getDocumentHandler()
{
return fDocHandler;
}
inline const DocumentHandler* SAXParser::getDocumentHandler() const
{
return fDocHandler;
}
inline EntityResolver* SAXParser::getEntityResolver()
{
return fEntityResolver;
}
inline const EntityResolver* SAXParser::getEntityResolver() const
{
return fEntityResolver;
}
inline ErrorHandler* SAXParser::getErrorHandler()
{
return fErrorHandler;
}
inline const ErrorHandler* SAXParser::getErrorHandler() const
{
return fErrorHandler;
}
inline const XMLScanner& SAXParser::getScanner() const
{
return *fScanner;
}
#endif