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92 lines
3.4 KiB
C++
92 lines
3.4 KiB
C++
//
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// DeclHandler.h
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//
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// Library: XML
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// Package: SAX
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// Module: SAX
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//
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// SAX2-ext DeclHandler Interface.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef SAX_DeclHandler_INCLUDED
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#define SAX_DeclHandler_INCLUDED
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#include "Poco/XML/XML.h"
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#include "Poco/XML/XMLString.h"
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namespace Poco {
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namespace XML {
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class XML_API DeclHandler
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/// This is an optional extension handler for SAX2 to provide information
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/// about DTD declarations in an XML document. XML
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/// readers are not required to support this handler, and this handler is
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/// not included in the core SAX2 distribution.
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///
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/// Note that data-related DTD declarations (unparsed entities and notations)
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/// are already reported through the DTDHandler interface.
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/// If you are using the declaration handler together with a lexical handler,
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/// all of the events will occur between the startDTD and the endDTD events.
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/// To set the DeclHandler for an XML reader, use the setProperty method
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/// with the propertyId "http://xml.org/sax/properties/declaration-handler".
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/// If the reader does not support declaration events, it will throw a
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/// SAXNotRecognizedException or a SAXNotSupportedException when you attempt to
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/// register the handler.
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{
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public:
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virtual void attributeDecl(const XMLString& eName, const XMLString& aName, const XMLString* valueDefault, const XMLString* value) = 0;
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/// Report an attribute type declaration.
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///
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/// Only the effective (first) declaration for an attribute will be reported.
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/// The type will be one of the strings "CDATA", "ID", "IDREF", "IDREFS",
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/// "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES", a parenthesized token group
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/// with the separator "|" and all whitespace removed, or the word "NOTATION"
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/// followed by a space followed by a parenthesized token group with all whitespace
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/// removed.
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///
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/// The value will be the value as reported to applications, appropriately normalized
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/// and with entity and character references expanded.
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virtual void elementDecl(const XMLString& name, const XMLString& model) = 0;
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/// Report an element type declaration.
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///
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/// The content model will consist of the string "EMPTY", the string "ANY", or a
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/// parenthesised group, optionally followed by an occurrence indicator. The model
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/// will be normalized so that all parameter entities are fully resolved and all
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/// whitespace is removed,and will include the enclosing parentheses. Other
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/// normalization (such as removing redundant parentheses or simplifying occurrence
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/// indicators) is at the discretion of the parser.
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virtual void externalEntityDecl(const XMLString& name, const XMLString* publicId, const XMLString& systemId) = 0;
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/// Report an external entity declaration.
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///
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/// Only the effective (first) declaration for each entity will be reported.
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///
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/// If the system identifier is a URL, the parser must resolve it fully before
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/// passing it to the application.
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virtual void internalEntityDecl(const XMLString& name, const XMLString& value) = 0;
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/// Report an internal entity declaration.
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///
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/// Only the effective (first) declaration for each entity will be reported. All
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/// parameter entities in the value will be expanded, but general entities will not.
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protected:
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virtual ~DeclHandler();
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};
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} } // namespace Poco::XML
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#endif // SAX_DeclHandler_INCLUDED
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