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// 
// EntityResolverImpl.h 
// 
// Library: XML 
// Package: SAX 
// Module:  SAX 
// 
// An implementation of EntityResolver. 
// 
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. 
// and Contributors. 
// 
// SPDX-License-Identifier:	BSL-1.0 
// 
 
 
#ifndef SAX_EntityResolverImpl_INCLUDED 
#define SAX_EntityResolverImpl_INCLUDED 
 
 
#include "Poco/XML/XML.h" 
#include "Poco/XML/XMLString.h" 
#include "Poco/SAX/EntityResolver.h" 
#include "Poco/URIStreamOpener.h" 
 
 
namespace Poco { 
namespace XML { 
 
 
class XML_API EntityResolverImpl: public EntityResolver 
	/// A default implementation of the EntityResolver interface. 
	/// 
	/// The system ID is first interpreted as an URI and the 
	/// URIStreamOpener is used to create and open an istream 
	/// for an InputSource. 
	/// 
	/// If the system ID is not a valid URI, it is 
	/// interpreted as a filesystem path and a Poco::FileInputStream 
	/// is opened for it. 
{ 
public: 
	EntityResolverImpl(); 
		/// Creates an EntityResolverImpl that uses the default 
		/// URIStreamOpener. 
		 
	EntityResolverImpl(const Poco::URIStreamOpener& opener); 
		/// Creates an EntityResolverImpl that uses the given 
		/// URIStreamOpener. 
		 
	~EntityResolverImpl(); 
		/// Destroys the EntityResolverImpl. 
	 
	InputSource* resolveEntity(const XMLString* publicId, const XMLString& systemId); 
		/// Tries to use the URIStreamOpener to create and open an istream 
		/// for the given systemId, which is interpreted as an URI. 
		/// 
		/// If the systemId is not a valid URI, it is interpreted as 
		/// a local filesystem path and a Poco::FileInputStream is opened for it. 
		 
	void releaseInputSource(InputSource* pSource); 
		/// Deletes the InputSource's stream. 
	 
protected: 
	std::istream* resolveSystemId(const XMLString& systemId);	 
	 
private: 
	EntityResolverImpl(const EntityResolverImpl&); 
	EntityResolverImpl& operator = (const EntityResolverImpl&); 
	 
	const Poco::URIStreamOpener& _opener; 
}; 
 
 
} } // namespace Poco::XML 
 
 
#endif // SAX_EntityResolverImpl_INCLUDED