sax2xmlreader.hpp

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      *         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&,...)
      */
    virtual bool parseFirst
    (
        const   XMLCh* const    systemId
        ,       XMLPScanToken&  toFill
    ) = 0;

    /** 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.
      *
      * @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&,...)
      */
    virtual bool parseFirst
    (
        const   char* const     systemId
        ,       XMLPScanToken&  toFill
    ) = 0;

    /** 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.
      *
      * @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*,...)
      */
    virtual bool parseFirst
    (
        const   InputSource&    source
        ,       XMLPScanToken&  toFill
    ) = 0;

    /** 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&,...)
      */
    virtual bool parseNext(XMLPScanToken& token) = 0;

    /** 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.
      */
    virtual void parseReset(XMLPScanToken& token) = 0;

    //@}

    // -----------------------------------------------------------------------
    //  Grammar preparsing interface
    // -----------------------------------------------------------------------

    /** @name Grammar preparsing interface's. */
    //@{
    /**
      * Preparse schema grammar (XML Schema, DTD, etc.) via an input source
      * object.
      *
      * This method invokes the preparsing process on a schema grammar XML
      * file specified by the SAX InputSource parameter. If the 'toCache' flag
      * is enabled, the parser will cache the grammars for re-use. If a grammar
      * key is found in the pool, no caching of any grammar will take place.
      *
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * @param source A const reference to the SAX InputSource object which
      *               points to the schema grammar file to be preparsed.
      * @param grammarType The grammar type (Schema or DTD).
      * @param toCache If <code>true</code>, we cache the preparsed grammar,
      *                otherwise, no chaching. Default is <code>false</code>.
      * @return The preparsed schema grammar object (SchemaGrammar or
      *         DTDGrammar). That grammar object is owned by the parser.
      *
      * @exception SAXException Any SAX exception, possibly
      *            wrapping another exception.
      * @exception XMLException An exception from the parser or client
      *            handler code.
      * @exception DOMException A DOM exception as per DOM spec.
      *
      * @see InputSource#InputSource
      */
    virtual Grammar* loadGrammar(const InputSource& source,
                                 const short grammarType,
                                 const bool toCache = false) = 0;

    /**
      * Preparse schema grammar (XML Schema, DTD, etc.) via a file path or URL
      *
      * This method invokes the preparsing process on a schema grammar XML
      * file specified by the file path parameter. If the 'toCache' flag
      * is enabled, the parser will cache the grammars for re-use. If a grammar
      * key is found in the pool, no caching of any grammar will take place.
      *
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * @param systemId A const XMLCh pointer to the Unicode string which
      *                 contains the path to the XML grammar file to be
      *                 preparsed.
      * @param grammarType The grammar type (Schema or DTD).
      * @param toCache If <code>true</code>, we cache the preparsed grammar,
      *                otherwise, no chaching. Default is <code>false</code>.
      * @return The preparsed schema grammar object (SchemaGrammar or
      *         DTDGrammar). That grammar object is owned by the parser.
      *
      * @exception SAXException Any SAX exception, possibly
      *            wrapping another exception.
      * @exception XMLException An exception from the parser or client
      *            handler code.
      * @exception DOMException A DOM exception as per DOM spec.
      */
    virtual Grammar* loadGrammar(const XMLCh* const systemId,
                                 const short grammarType,
                                 const bool toCache = false) = 0;

    /**
      * Preparse schema grammar (XML Schema, DTD, etc.) via a file path or URL
      *
      * This method invokes the preparsing process on a schema grammar XML
      * file specified by the file path parameter. If the 'toCache' flag
      * is enabled, the parser will cache the grammars for re-use. If a grammar
      * key is found in the pool, no caching of any grammar will take place.
      *
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * @param systemId A const char pointer to a native string which contains
      *                 the path to the XML grammar file to be preparsed.
      * @param grammarType The grammar type (Schema or DTD).
      * @param toCache If <code>true</code>, we cache the preparsed grammar,
      *                otherwise, no chaching. Default is <code>false</code>.
      * @return The preparsed schema grammar object (SchemaGrammar or
      *         DTDGrammar). That grammar object is owned by the parser.
      *
      * @exception SAXException Any SAX exception, possibly
      *            wrapping another exception.
      * @exception XMLException An exception from the parser or client
      *            handler code.
      * @exception DOMException A DOM exception as per DOM spec.
      */
    virtual Grammar* loadGrammar(const char* const systemId,
                                 const short grammarType,
                                 const bool toCache = false) = 0;

    /**
      * Clear the cached grammar pool
      */
    virtual void resetCachedGrammarPool() = 0;

    /** Set maximum input buffer size
      *
      * This method allows users to limit the size of buffers used in parsing
      * XML character data. The effect of setting this size is to limit the
      * size of a ContentHandler::characters() call.
      *
      * The parser's default input buffer size is 1 megabyte.
      *
      * @param bufferSize The maximum input buffer size
      */
    virtual void setInputBufferSize(const size_t bufferSize);

    //@}


    // -----------------------------------------------------------------------
    //  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
      */
    virtual void installAdvDocHandler(XMLDocumentHandler* const toInstall) = 0;

    /**
      * 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
      */
    virtual bool removeAdvDocHandler(XMLDocumentHandler* const toRemove) = 0;
    //@}

private :
    /* The copy constructor, you cannot call this directly */
    SAX2XMLReader(const SAX2XMLReader&);

    /* The assignment operator, you cannot call this directly */
    SAX2XMLReader& operator=(const SAX2XMLReader&);

};

inline void SAX2XMLReader::setInputBufferSize(const size_t /*bufferSize*/) 
{
}

XERCES_CPP_NAMESPACE_END

#endif