source: XMLIO_V2/external/include/Poco/SAX/XMLFilterImpl.h @ 80

//
// XMLFilterImpl.h
//
// $Id: //poco/1.3/XML/include/Poco/SAX/XMLFilterImpl.h#2 $
//
// Library: XML
// Package: SAX
// Module:  SAXFilters
//
// SAX2 XMLFilterImpl class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef SAX_XMLFilterImpl_INCLUDED
#define SAX_XMLFilterImpl_INCLUDED


#include "Poco/XML/XML.h"
#include "Poco/SAX/XMLFilter.h"
#include "Poco/SAX/EntityResolver.h"
#include "Poco/SAX/DTDHandler.h"
#include "Poco/SAX/ContentHandler.h"
#include "Poco/SAX/ErrorHandler.h"


namespace Poco {
namespace XML {


class XML_API XMLFilterImpl: public XMLFilter, public EntityResolver, public DTDHandler, public ContentHandler, public ErrorHandler
        /// Base class for deriving an XML filter.
        ///
        /// This class is designed to sit between an XMLReader and the client application's event 
        /// handlers. By default, it does nothing but pass requests up to the reader and events on to 
        /// the handlers unmodified, but subclasses can override specific methods to modify the event 
        /// stream or the configuration requests as they pass through.
{
public:
        XMLFilterImpl();
                /// Construct an empty XML filter, with no parent.
                ///
                /// This filter will have no parent: you must assign a parent before you start a parse or do any 
                /// configuration with setFeature or setProperty, unless you use this as a pure event consumer rather 
                /// than as an XMLReader.
                
        XMLFilterImpl(XMLReader* pParent);
                /// Construct an XML filter with the specified parent.
                
        ~XMLFilterImpl();
                /// Destroys the XMLFilterImpl.
        
        // XMLFilter
        XMLReader* getParent() const;
        void setParent(XMLReader* pParent);

        // XMLReader
        void setEntityResolver(EntityResolver* pResolver);
        EntityResolver* getEntityResolver() const;
        void setDTDHandler(DTDHandler* pDTDHandler);
        DTDHandler* getDTDHandler() const;
        void setContentHandler(ContentHandler* pContentHandler);
        ContentHandler* getContentHandler() const;
        void setErrorHandler(ErrorHandler* pErrorHandler);
        ErrorHandler* getErrorHandler() const;
        void setFeature(const XMLString& featureId, bool state);
        bool getFeature(const XMLString& featureId) const;
        void setProperty(const XMLString& propertyId, const XMLString& value);
        void setProperty(const XMLString& propertyId, void* value);
        void* getProperty(const XMLString& propertyId) const;
        void parse(InputSource* pSource);
        void parse(const XMLString& systemId);
        void parseMemoryNP(const char* xml, std::size_t size);

        // EntityResolver
        InputSource* resolveEntity(const XMLString* publicId, const XMLString& systemId);
        void releaseInputSource(InputSource* pSource);
        
        // DTDHandler
        void notationDecl(const XMLString& name, const XMLString* publicId, const XMLString* systemId);
        void unparsedEntityDecl(const XMLString& name, const XMLString* publicId, const XMLString& systemId, const XMLString& notationName);

        // ContentHandler
        void setDocumentLocator(const Locator* loc);
        void startDocument();
        void endDocument();
        void startElement(const XMLString& uri, const XMLString& localName, const XMLString& qname, const Attributes& attrList);
        void endElement(const XMLString& uri, const XMLString& localName, const XMLString& qname);
        void characters(const XMLChar ch[], int start, int length);
        void ignorableWhitespace(const XMLChar ch[], int start, int length);
        void processingInstruction(const XMLString& target, const XMLString& data);
        void startPrefixMapping(const XMLString& prefix, const XMLString& uri);
        void endPrefixMapping(const XMLString& prefix);
        void skippedEntity(const XMLString& prefix);
        void warning(const SAXException& e);
        void error(const SAXException& e);
        void fatalError(const SAXException& e);

protected:
        XMLReader* parent() const;
                /// Return a pointer to the parent reader.
                /// Subclasses can use this method instead of
                /// getParent() for better performance - this method
                /// is non-virtual and implemented as inline.
        
        virtual void setupParse();
                /// Setup the event handlers in the parent reader.
        
private:
        XMLReader*      _pParent;
        EntityResolver* _pEntityResolver;
        DTDHandler*     _pDTDHandler;
        ContentHandler* _pContentHandler;
        ErrorHandler*   _pErrorHandler;
};


//
// inlines
//
inline XMLReader* XMLFilterImpl::parent() const
{
        return _pParent;
}


} } // namespace Poco::XML


#endif // SAX_XMLFilterImpl_INCLUDED