//
// EntityReference.h
//
// $Id: //poco/Main/XML/include/DOM/EntityReference.h#5 $
//
// Definition of the DOM EntityReference class.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef DOM_EntityReference_INCLUDED
#define DOM_EntityReference_INCLUDED


#ifndef XML_XML_INCLUDED
#include "XML/XML.h"
#endif
#ifndef DOM_AbstractNode_INCLUDED
#include "DOM/AbstractNode.h"
#endif
#ifndef XML_XMLString_INCLUDED
#include "XML/XMLString.h"
#endif


XML_BEGIN


class XML_API EntityReference: public AbstractNode
	/// EntityReference objects may be inserted into the structure model when an
	/// entity reference is in the source document, or when the user wishes to insert
	/// an entity reference. Note that character references and references to predefined
	/// entities are considered to be expanded by the HTML or XML processor so that
	/// characters are represented by their Unicode equivalent rather than by an
	/// entity reference. Moreover, the XML processor may completely expand references
	/// to entities while building the structure model, instead of providing EntityReference
	/// objects. If it does provide such objects, then for a given EntityReference
	/// node, it may be that there is no Entity node representing the referenced
	/// entity. If such an Entity exists, then the child list of the EntityReference
	/// node is the same as that of the Entity node.
	/// 
	/// As for Entity nodes, EntityReference nodes and all their descendants are
	/// readonly.
	/// 
	/// The resolution of the children of the EntityReference (the replacement value
	/// of the referenced Entity) may be lazily evaluated; actions by the user (such
	/// as calling the childNodes method on the EntityReference node) are assumed
	/// to trigger the evaluation.
{
public:
	// Node
	const XMLString& nodeName() const;
	unsigned short nodeType() const;

protected:
	EntityReference(Document* pOwnerDocument, const XMLString& name);
	EntityReference(Document* pOwnerDocument, const EntityReference& ref);
	~EntityReference();

	Node* copyNode(bool deep, Document* pOwnerDocument) const;

private:
	XMLString _name;
	
	friend class Document;
};


XML_END


#endif // DOM_EntityReference_INCLUDED