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

//
// DeclHandler.h
//
// $Id: //poco/1.3/XML/include/Poco/SAX/DeclHandler.h#1 $
//
// Library: XML
// Package: SAX
// Module:  SAX
//
// SAX2-ext DeclHandler Interface.
//
// 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_DeclHandler_INCLUDED
#define SAX_DeclHandler_INCLUDED


#include "Poco/XML/XML.h"
#include "Poco/XML/XMLString.h"


namespace Poco {
namespace XML {


class XML_API DeclHandler
        /// This is an optional extension handler for SAX2 to provide information 
        /// about DTD declarations in an XML document. XML
        /// readers are not required to support this handler, and this handler is 
        /// not included in the core SAX2 distribution.
        ///
        /// Note that data-related DTD declarations (unparsed entities and notations) 
        /// are already reported through the DTDHandler interface.
        /// If you are using the declaration handler together with a lexical handler, 
        /// all of the events will occur between the startDTD and the endDTD events.
        /// To set the DeclHandler for an XML reader, use the setProperty method 
        /// with the propertyId "http://xml.org/sax/properties/declaration-handler". 
        /// If the reader does not support declaration events, it will throw a
        /// SAXNotRecognizedException or a SAXNotSupportedException when you attempt to 
        /// register the handler.
{
public:
        virtual void attributeDecl(const XMLString& eName, const XMLString& aName, const XMLString* valueDefault, const XMLString* value) = 0;
                /// Report an attribute type declaration.
                /// 
                /// Only the effective (first) declaration for an attribute will be reported. 
                /// The type will be one of the strings "CDATA", "ID", "IDREF", "IDREFS", 
                /// "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES", a parenthesized token group 
                /// with the separator "|" and all whitespace removed, or the word "NOTATION" 
                /// followed by a space followed by a parenthesized token group with all whitespace 
                /// removed.
                ///
                /// The value will be the value as reported to applications, appropriately normalized 
                /// and with entity and character references expanded. 
                
        virtual void elementDecl(const XMLString& name, const XMLString& model) = 0;
                /// Report an element type declaration.
                ///
                /// The content model will consist of the string "EMPTY", the string "ANY", or a 
                /// parenthesised group, optionally followed by an occurrence indicator. The model 
                /// will be normalized so that all parameter entities are fully resolved and all 
                /// whitespace is removed,and will include the enclosing parentheses. Other 
                /// normalization (such as removing redundant parentheses or simplifying occurrence 
                /// indicators) is at the discretion of the parser.
                
        virtual void externalEntityDecl(const XMLString& name, const XMLString* publicId, const XMLString& systemId) = 0;
                /// Report an external entity declaration.
                /// 
                /// Only the effective (first) declaration for each entity will be reported.
                /// 
                /// If the system identifier is a URL, the parser must resolve it fully before 
                /// passing it to the application.

        virtual void internalEntityDecl(const XMLString& name, const XMLString& value) = 0;
                /// Report an internal entity declaration.
                ///
                /// Only the effective (first) declaration for each entity will be reported. All 
                /// parameter entities in the value will be expanded, but general entities will not.

protected:
        virtual ~DeclHandler();
};


} } // namespace Poco::XML


#endif // SAX_DeclHandler_INCLUDED