dombuilderimpl.hpp

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * $Id: DOMBuilderImpl.hpp 569031 2007-08-23 15:05:28Z amassari $
 *
 */

#if !defined(DOMBUILDERIMPL_HPP)
#define DOMBUILDERIMPL_HPP


#include <xercesc/parsers/AbstractDOMParser.hpp>
#include <xercesc/dom/DOMBuilder.hpp>
#include <xercesc/util/XercesDefs.hpp>


XERCES_CPP_NAMESPACE_BEGIN

class XMLEntityResolver;
class XMLResourceIdentifier;

 /**
  * Introduced in DOM Level 3
  *
  * DOMBuilderImpl provides an implementation of a DOMBuilder interface.
  * A DOMBuilder instance is obtained from the DOMImplementationLS interface
  * by invoking its createDOMBuilder method.
  */
class PARSERS_EXPORT DOMBuilderImpl : public AbstractDOMParser,
                                      public DOMBuilder
{
public :
    // -----------------------------------------------------------------------
    //  Constructors and Detructor
    // -----------------------------------------------------------------------

    /** @name Constructors and Destructor */
    //@{
    /** Construct a DOMBuilderImpl, with an optional validator
      *
      * Constructor with an instance of validator class to use for
      * validation. If you don't provide a validator, a default one will
      * be created for you in the scanner.
      *
      * @param gramPool   Pointer to the grammar pool instance from 
      *                   external application.
      *                   The parser does NOT own it.
      *
      * @param valToAdopt Pointer to the validator instance to use. The
      *                   parser is responsible for freeing the memory.
      */
    DOMBuilderImpl
    (
          XMLValidator* const   valToAdopt = 0
        , MemoryManager* const  manager = XMLPlatformUtils::fgMemoryManager
        , XMLGrammarPool* const gramPool = 0        
    );

    /**
      * Destructor
      */
    virtual ~DOMBuilderImpl();

    //@}

    // -----------------------------------------------------------------------
    //  Implementation of DOMBuilder interface
    // -----------------------------------------------------------------------
    // -----------------------------------------------------------------------
    //  Getter methods
    // -----------------------------------------------------------------------

    /** @name Getter methods */
    //@{

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Get a pointer to the error handler
      *
      * This method returns the installed error handler. If no handler
      * has been installed, then it will be a zero pointer.
      *
      * @return The pointer to the installed error handler object.
      */
    DOMErrorHandler* getErrorHandler();

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Get a const pointer to the error handler
      *
      * This method returns the installed error handler.  If no handler
      * has been installed, then it will be a zero pointer.
      *
      * @return A const pointer to the installed error handler object.
      */
    const DOMErrorHandler* getErrorHandler() const;

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Get a pointer to the entity resolver
      *
      * This method returns the installed entity resolver.  If no resolver
      * has been installed, then it will be a zero pointer.
      *
      * @return The pointer to the installed entity resolver object.
      */
    DOMEntityResolver* getEntityResolver();

    /**
      * Get a pointer to the entity resolver
      *
      * This method returns the installed entity resolver.  If no resolver
      * has been installed, then it will be a zero pointer.
      *
      * @return The pointer to the installed entity resolver object.
      */
    XMLEntityResolver* getXMLEntityResolver();
 
    /**
      * Get a const pointer to the entity resolver
      *
      * This method returns the installed entity resolver. If no resolver
      * has been installed, then it will be a zero pointer.
      *
      * @return A const pointer to the installed entity resolver object.
      */
    const XMLEntityResolver* getXMLEntityResolver() const;

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Get a const pointer to the entity resolver
      *
      * This method returns the installed entity resolver. If no resolver
      * has been installed, then it will be a zero pointer.
      *
      * @return A const pointer to the installed entity resolver object.
      */
    const DOMEntityResolver* getEntityResolver() const;

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Get a pointer to the application filter
      *
      * This method returns the installed application filter. If no filter
      * has been installed, then it will be a zero pointer.
      *
      * @return The pointer to the installed application filter.
      */
    DOMBuilderFilter* getFilter();

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Get a const pointer to the application filter
      *
      * This method returns the installed application filter. If no filter
      * has been installed, then it will be a zero pointer.
      *
      * @return A const pointer to the installed application filter
      */
    const DOMBuilderFilter* getFilter() const;

    //@}


    // -----------------------------------------------------------------------
    //  Setter methods
    // -----------------------------------------------------------------------

    /** @name Setter methods */
    //@{

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Set the error handler
      *
      * This method allows applications to install their own error handler
      * to trap error and warning messages.
      *
      * <i>Any previously set handler is merely dropped, since the parser
      * does not own them.</i>
      *
      * @param handler  A const pointer to the user supplied error
      *                 handler.
      *
      * @see #getErrorHandler
      */
    void setErrorHandler(DOMErrorHandler* const handler);

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Set the entity resolver
      *
      * This method allows applications to install their own entity
      * resolver. By installing an entity resolver, the applications
      * can trap and potentially redirect references to external
      * entities.
      *
      * <i>Any previously set entity resolver is merely dropped, since the parser
      * does not own them.  If both setEntityResolver and setXMLEntityResolver
      * are called, then the last one is used.</i>
      *
      * @param handler  A const pointer to the user supplied entity
      *                 resolver.
      *
      * @see #getEntityResolver
      */
    void setEntityResolver(DOMEntityResolver* const handler);

    /**
      * Set the entity resolver
      *
      * This method allows applications to install their own entity
      * resolver. By installing an entity resolver, the applications
      * can trap and potentially redirect references to external
      * entities.
      *
      * <i>Any previously set entity resolver is merely dropped, since the parser
      * does not own them.  If both setEntityResolver and setXMLEntityResolver
      * are called, then the last one is used.</i>
      *
      * @param handler  A const pointer to the user supplied entity
      *                 resolver.
      *
      * @see #getXMLEntityResolver
      */
    void setXMLEntityResolver(XMLEntityResolver* const handler);

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Set the application filter
      *
      * When the application provides a filter, the parser will call out to
      * the filter at the completion of the construction of each Element node.
      * The filter implementation can choose to remove the element from the
      * document being constructed (unless the element is the document element)
      * or to terminate the parse early. If the document is being validated
      * when it's loaded the validation happens before the filter is called.
      *
      * <i>Any previously set filter is merely dropped, since the parser
      * does not own them.</i>
      *
      * @param filter  A const pointer to the user supplied application
      *                filter.
      *
      * @see #getFilter
      */
    void setFilter(DOMBuilderFilter* const filter);

    //@}


    // -----------------------------------------------------------------------
    //  Feature methods
    // -----------------------------------------------------------------------
    /** @name Feature methods */
    //@{

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Set the state of a feature
      *
      * It is possible for a DOMBuilder to recognize a feature name but to be
      * unable to set its value.
      *
      * @param name  The feature name.
      * @param state The requested state of the feature (true or false).
      * @exception DOMException
      *     NOT_SUPPORTED_ERR: Raised when the DOMBuilder recognizes the
      *     feature name but cannot set the requested value.
      *     <br>NOT_FOUND_ERR: Raised when the DOMBuilder does not recognize
      *     the feature name.
      *
      * @see #getFeature
      * @see #canSetFeature
      */
    void setFeature(const XMLCh* const name, const bool state);

    /**
      * <p><b>"Experimental - subject to change"</b></p>
      *
      * Look up the value of a feature.
      *
      * @param name The feature name.
      * @return The current state of the feature (true or false)
      * @exception DOMException
      *     NOT_FOUND_ERR: Raised when the DOMBuilder does not recognize
      *     the feature name.
      *
      * @see #setFeature
      * @see #canSetFeature
      */
    bool getFeature(const XMLCh* const name) const;

    /**