/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
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#ifndef __COMPHELPER_UNOINTERFACETOUNIQUEIDENTIFIERMAPPER__
#define __COMPHELPER_UNOINTERFACETOUNIQUEIDENTIFIERMAPPER__

#include <map>
#include <rtl/ustring.hxx>
#include <com/sun/star/uno/XInterface.hpp>

namespace comphelper
{

typedef ::std::map< rtl::OUString, const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > > IdMap_t;

class UnoInterfaceToUniqueIdentifierMapper
{
public:
	UnoInterfaceToUniqueIdentifierMapper();

	/** returns a unique identifier for the given uno object. IF a uno object is 
		registered more than once, the returned identifier is always the same.
	*/
	const rtl::OUString& registerReference( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& rInterface );
	
	/** registers the given uno object with the given identifier.
	
		@returns
			false, if the given identifier already exists and is not associated with the given interface
	*/
	bool registerReference( const rtl::OUString& rIdentifier, const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& rInterface );

	/** @returns
			the identifier for the given uno object. If this uno object is not already
			registered, an empty string is returned
	*/
	const rtl::OUString& getIdentifier( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& rInterface ) const;
	
	/** @returns
		the uno object that is registered with the given identifier. If no uno object
		is registered with the given identifier, an empty reference is returned.
	*/
	const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& getReference( const rtl::OUString& rIdentifier ) const;

private:
	bool findReference( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& rInterface, IdMap_t::const_iterator& rIter ) const;
	bool findIdentifier( const rtl::OUString& rIdentifier, IdMap_t::const_iterator& rIter ) const;

	IdMap_t	maEntries;
	sal_Int32 mnNextId;	
};

}

#endif