dombuilderimpl.hpp

开源xml解析库,非常有名

      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Query whether setting a feature to a specific value is supported.
      *
      * @param name  The feature name.
      * @param state The requested state of the feature (true or false).
      * @return <code>true</code> if the feature could be successfully set
      *     to the specified value, or <code>false</code> if the feature
      *     is not recognized or the requested value is not supported. The
      *     value of the feature itself is not changed.
      *
      * @see #getFeature
      * @see #setFeature
      */
    bool canSetFeature(const XMLCh* const name, const bool state) const;

    //@}

    // -----------------------------------------------------------------------
    //  Parsing methods
    // -----------------------------------------------------------------------
    /** @name Parsing methods */
    //@{

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Parse via an input source object
      *
      * This method invokes the parsing process on the XML file specified
      * by the DOMInputSource parameter. This API is borrowed from the
      * SAX Parser interface.
      *
      * @param source A const reference to the DOMInputSource object which
      *               points to the XML file to be parsed.
      * @return If the DOMBuilder is a synchronous DOMBuilder the newly created
      *         and populated Document is returned. If the DOMBuilder is
      *         asynchronous then <code>null</code> is returned since the
      *         document object is not yet parsed when this method returns.
      * @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 DOMInputSource#DOMInputSource
      * @see #setEntityResolver
      * @see #setErrorHandler
      */
    DOMDocument* parse(const DOMInputSource& source);

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Parse via a file path or URL
      *
      * 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.
      * @return If the DOMBuilder is a synchronous DOMBuilder the newly created
      *         and populated Document is returned. If the DOMBuilder is
      *         asynchronous then <code>null</code> is returned since the
      *         document object is not yet parsed when this method returns.
      * @exception SAXException Any SAX exception, possibly
      *            wrapping another exception.
      * @exception XMLException An exception from the parser or client
      *            handler code.
      * @exception DOM_DOMException A DOM exception as per DOM spec.
      *
      * @see #parse(DOMInputSource,...)
      */
    DOMDocument* parseURI(const XMLCh* const systemId);

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Parse via a file path or URL (in the local code page)
      *
      * 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.
      * @return If the DOMBuilder is a synchronous DOMBuilder the newly created
      *         and populated Document is returned. If the DOMBuilder is
      *         asynchronous then <code>null</code> is returned since the
      *         document object is not yet parsed when this method returns.
      * @exception SAXException Any SAX exception, possibly
      *            wrapping another exception.
      * @exception XMLException An exception from the parser or client
      *            handler code.
      * @exception DOM_DOMException A DOM exception as per DOM spec.
      *
      * @see #parse(DOMInputSource,...)
      */
    DOMDocument* parseURI(const char* const systemId);

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Parse via an input source object
      *
      * This method invokes the parsing process on the XML file specified
      * by the DOMInputSource parameter, and inserts the content into an
      * existing document at the position specified with the contextNode
      * and action arguments. When parsing the input stream the context node
      * is used for resolving unbound namespace prefixes.
      *
      * @param source A const reference to the DOMInputSource object which
      *               points to the XML file to be parsed.
      * @param contextNode The node that is used as the context for the data
      *                    that is being parsed. This node must be a Document
      *                    node, a DocumentFragment node, or a node of a type
      *                    that is allowed as a child of an element, e.g. it
      *                    can not be an attribute node.
      * @param action This parameter describes which action should be taken
      *               between the new set of node being inserted and the
      *               existing children of the context node.
      * @exception DOMException
      *     NOT_SUPPORTED_ERR: Raised when the DOMBuilder doesn't support
      *     this method.
      *     <br>NO_MODIFICATION_ALLOWED_ERR: Raised if the context node is
      *     readonly.
      */
    virtual void parseWithContext
    (
        const   DOMInputSource& source
        ,       DOMNode* const contextNode
        , const short action
    );


    // -----------------------------------------------------------------------
    //  Non-standard Extension
    // -----------------------------------------------------------------------
    /** @name Non-standard Extension */
    //@{

    /**
      * Query the current value of a property in a DOMBuilder.
      *
      * The builder owns the returned pointer.  The memory allocated for
      * the returned pointer will be destroyed when the builder is deleted.
      *
      * To ensure assessiblity of the returned information after the builder
      * is deleted, callers need to copy and store the returned information
      * somewhere else; otherwise you may get unexpected result.  Since the returned
      * pointer is a generic void pointer, see
      * http://xerces.apache.org/xerces-c/program-dom.html#DOMBuilderProperties to learn
      * exactly what type of property value each property returns for replication.
      *
      * @param name The unique identifier (URI) of the property being set.
      * @return     The current value of the property.  The pointer spans the same
      *             life-time as the parser.  A null pointer is returned if nothing
      *             was specified externally.
      * @exception DOMException
      *     <br>NOT_FOUND_ERR: Raised when the DOMBuilder does not recognize
      *     the requested property.
      */
    virtual void* getProperty(const XMLCh* const name) const;

    /**
      * Set the value of any property in a DOMBuilder.
      * See http://xerces.apache.org/xerces-c/program-dom.html#DOMBuilderProperties for
      * the list of supported properties.
      *
      * It takes a void pointer as the property value.  Application is required to initialize this void
      * pointer to a correct type.  See http://xerces.apache.org/xerces-c/program-dom.html#DOMBuilderProperties
      * to learn exactly what type of property value each property expects for processing.
      * Passing a void pointer that was initialized with a wrong type will lead to unexpected result.
      * If the same property is set more than once, the last one takes effect.
      *
      * @param name The unique identifier (URI) of the property being set.
      * @param value The requested value for the property.
      *            See http://xerces.apache.org/xerces-c/program-dom.html#DOMBuilderProperties to learn
      *            exactly what type of property value each property expects for processing.
      *            Passing a void pointer that was initialized with a wrong type will lead
      *            to unexpected result.
      * @exception DOMException
      *     <br>NOT_FOUND_ERR: Raised when the DOMBuilder does not recognize
      *     the requested property.
      */
    virtual void setProperty(const XMLCh* const name, void* value);

    /**
     * Called to indicate that this DOMBuilder is no longer in use
     * and that the implementation may relinquish any resources associated with it.
     *
     */
    virtual void              release();

    /** Reset the documents vector pool and release all the associated memory
      * back to the system.
      *
      * When parsing a document using a DOM parser, all memory allocated
      * for a DOM tree is associated to the DOM document.
      *
      * If you do multiple parse using the same DOM parser instance, then
      * multiple DOM documents will be generated and saved in a vector pool.
      * All these documents (and thus all the allocated memory)
      * won't be deleted until the parser instance is destroyed.
      *
      * If you don't need these DOM documents anymore and don't want to
      * destroy the DOM parser instance at this moment, then you can call this method
      * to reset the document vector pool and release all the allocated memory
      * back to the system.
      *
      * It is an error to call this method if you are in the middle of a
      * parse (e.g. in the mid of a progressive parse).
      *
      * @exception IOException An exception from the parser if this function
      *            is called when a parse is in progress.
      *
      */
    virtual void resetDocumentPool();

    /**
      * 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 DOMInputSource 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 DOMInputSource 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 DOMInputSource#DOMInputSource
      */
    virtual Grammar* loadGrammar(const DOMInputSource& source,
                             const short grammarType,
                             const bool toCache = false);

    /**
      * 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);

    /**
      * 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);

    /**
     * Retrieve the grammar that is associated with the specified namespace key
     *
     * @param  nameSpaceKey Namespace key
     * @return Grammar associated with the Namespace key.
     */
    virtual Grammar* getGrammar(const XMLCh* const nameSpaceKey) const;

    /**
     * Retrieve the grammar where the root element is declared.
     *
     * @return Grammar where root element declared
     */