AOO410/main/comphelper/inc/comphelper/extract.hxx

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 * 
 * 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
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


#ifndef _COMPHELPER_EXTRACT_HXX_
#define _COMPHELPER_EXTRACT_HXX_

#include <com/sun/star/lang/IllegalArgumentException.hpp>
#include <com/sun/star/uno/XInterface.hpp>
#include <com/sun/star/uno/TypeClass.hpp>
#include <com/sun/star/uno/Type.hxx>
#include <com/sun/star/uno/Any.hxx>
#include "cppu/unotype.hxx"

namespace cppu
{

/**
 * Sets enum from int32 value.  This function does NOT check for valid enum values!
 *<BR>
 * @param nEnum			int32 enum value
 * @param rType			enum type
 * @return enum or emoty any.
 */
inline ::com::sun::star::uno::Any SAL_CALL int2enum(
	sal_Int32 nEnum, const ::com::sun::star::uno::Type & rType )
{
	if (rType.getTypeClass() == ::com::sun::star::uno::TypeClass_ENUM)
	{
		int nVal = nEnum;
		return ::com::sun::star::uno::Any( &nVal, rType );
	}
	return ::com::sun::star::uno::Any();
}

/**
 * Sets int32 from enum or int in any.
 *<BR>
 * @param rnEnum		[out] int32 enum value
 * @param rAny			enum or int
 * @param sal_True if enum or int value was set else sal_False.
 */
inline sal_Bool SAL_CALL enum2int( sal_Int32 & rnEnum, const ::com::sun::star::uno::Any & rAny )
{
	if (rAny.getValueTypeClass() == ::com::sun::star::uno::TypeClass_ENUM)
	{
		rnEnum = * reinterpret_cast< const int * >( rAny.getValue() );
		return sal_True;
	}

	return rAny >>= rnEnum;
}

/**
 * Sets int32 from enum or int in any with additional typecheck
 * <BR>
 * @param rAny			enum or int
 * @param eRet			the enum value as int. If there is not enum of the given type or
 *						a ::com::sun::star::lang::IllegalArgumentException is thrown
 */
template< typename E >
inline void SAL_CALL any2enum( E & eRet, const ::com::sun::star::uno::Any & rAny )
	throw( ::com::sun::star::lang::IllegalArgumentException )
{
	// check for type save enum
	if (! (rAny >>= eRet))
	{
		// if not enum, maybe integer?
		sal_Int32 nValue = 0;
		if (! (rAny >>= nValue))
			throw ::com::sun::star::lang::IllegalArgumentException();

		eRet = (E)nValue;
	}
}

/**
 * Template function to create an uno::Any from an enum
 *
 * @DEPRECATED : use makeAny< E >()
 *
 */
template< typename E >
inline ::com::sun::star::uno::Any SAL_CALL enum2any( E eEnum )
{
	return ::com::sun::star::uno::Any( &eEnum, ::cppu::UnoType< E >::get() );
}

/**
 * Extracts interface from an any.  If given any does not hold the demanded interface,
 * it will be queried for it.
 * If no interface is available, the out ref will be cleared.
 *<BR>
 * @param rxOut			[out] demanded interface
 * @param rAny			interface
 * @return sal_True if any reference (including the null ref) was retrieved from any else sal_False.
 */
template< class T >
inline sal_Bool SAL_CALL extractInterface(
	::com::sun::star::uno::Reference< T > & rxOut,
	const ::com::sun::star::uno::Any & rAny )
{
	rxOut.clear();
	return (rAny >>= rxOut);
}

/**
 * extracts a boolean either as a sal_Bool or an integer from
 * an any. If there is no sal_Bool or integer inside the any
 * a ::com::sun::star::lang::IllegalArgumentException is thrown
 *
 */
inline sal_Bool SAL_CALL any2bool( const ::com::sun::star::uno::Any & rAny )
	throw( ::com::sun::star::lang::IllegalArgumentException )
{
	if (rAny.getValueTypeClass() == ::com::sun::star::uno::TypeClass_BOOLEAN)
	{
		return *(sal_Bool *)rAny.getValue();
	}
	else
	{
		sal_Int32 nValue = 0;
		if (! (rAny >>= nValue))
			throw ::com::sun::star::lang::IllegalArgumentException();
		return nValue != 0;
	}
}

/**
 * Puts a boolean in an any.
 *
 * @DEPRECATED : use makeAny< sal_Bool >()
 *
 */
inline ::com::sun::star::uno::Any SAL_CALL bool2any( sal_Bool bBool )
{
	return ::com::sun::star::uno::Any( &bBool, ::getCppuBooleanType() );
}

}

#endif