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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
#ifndef COMPHELPER_UNWRAPARGS_HXX_INCLUDED
#define COMPHELPER_UNWRAPARGS_HXX_INCLUDED
#include "rtl/ustrbuf.hxx"
#include "com/sun/star/uno/Sequence.hxx"
#include "com/sun/star/lang/IllegalArgumentException.hpp"
#include "boost/optional.hpp"
#include "boost/preprocessor/cat.hpp"
#include "boost/preprocessor/repetition.hpp"
#include "boost/preprocessor/arithmetic/add.hpp"
#include "cppu/unotype.hxx"
namespace comphelper {
//
// generating helper functions to unwrap the service's argument sequence:
//
/// @internal
namespace detail {
template <typename T>
inline void extract(
::com::sun::star::uno::Sequence< ::com::sun::star::uno::Any> const& seq,
sal_Int32 nArg, T & v,
::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>
const& xErrorContext )
{
if (nArg >= seq.getLength()) {
throw ::com::sun::star::lang::IllegalArgumentException(
OUString( "No such argument available!"),
xErrorContext, static_cast<sal_Int16>(nArg) );
}
if (! (seq[nArg] >>= v)) {
OUStringBuffer buf;
buf.append( "Cannot extract ANY { " );
buf.append( seq[nArg].getValueType().getTypeName() );
buf.append( " } to " );
buf.append( ::cppu::UnoType<T>::get().getTypeName() );
buf.append( static_cast<sal_Unicode>('!') );
throw ::com::sun::star::lang::IllegalArgumentException(
buf.makeStringAndClear(), xErrorContext,
static_cast<sal_Int16>(nArg) );
}
}
template <typename T>
inline void extract(
::com::sun::star::uno::Sequence< ::com::sun::star::uno::Any> const& seq,
sal_Int32 nArg, ::boost::optional<T> & v,
::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>
const& xErrorContext )
{
if (nArg < seq.getLength()) {
T t;
extract( seq, nArg, t, xErrorContext );
v.reset( t );
}
}
} // namespace detail
#define COMPHELPER_UNWRAPARGS_extract(z_, n_, unused_) \
detail::extract( seq, n_, BOOST_PP_CAT(v, n_), xErrorContext );
#define COMPHELPER_UNWRAPARGS_args(z_, n_, unused_) \
BOOST_PP_CAT(T, n_) & BOOST_PP_CAT(v, n_)
/** The following preprocessor repetitions generate functions like
<pre>
template <typename T0, typename T1, ...>
inline void unwrapArgs(
uno::Sequence<uno::Any> const& seq,
T0 & v0, T1 & v1, ...,
css::uno::Reference<css::uno::XInterface> const& xErrorContext =
css::uno::Reference<css::uno::XInterface>() );
</pre>
(full namespace qualification ::com::sun::star has been omitted
for brevity)
which unwraps the passed sequence's elements, assigning them to the
referenced values. Specify optional arguments as boost::optional<T>.
If the length of the sequence is greater than the count of arguments,
then the latter sequence elements are ignored.
If too few arguments are given in the sequence and a missing argument is
no boost::optional<T>, then an lang::IllegalArgumentException is thrown
with the specified xErrorContext (defaults to null-ref).
The maximum number of service declarations can be set by defining
COMPHELPER_UNWRAPARGS_MAX_ARGS; its default is 12.
*/
#define COMPHELPER_UNWRAPARGS_make(z_, n_, unused_) \
template < BOOST_PP_ENUM_PARAMS( BOOST_PP_ADD(n_, 1), typename T) > \
inline void unwrapArgs( \
::com::sun::star::uno::Sequence< ::com::sun::star::uno::Any > const& seq, \
BOOST_PP_ENUM(BOOST_PP_ADD(n_, 1), COMPHELPER_UNWRAPARGS_args, ~), \
::com::sun::star::uno::Reference< \
::com::sun::star::uno::XInterface> const& xErrorContext = \
::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>() ) \
{ \
BOOST_PP_REPEAT(BOOST_PP_ADD(n_, 1), COMPHELPER_UNWRAPARGS_extract, ~) \
}
#ifndef COMPHELPER_UNWRAPARGS_MAX_ARGS
#define COMPHELPER_UNWRAPARGS_MAX_ARGS 12
#endif
BOOST_PP_REPEAT(COMPHELPER_UNWRAPARGS_MAX_ARGS, COMPHELPER_UNWRAPARGS_make, ~)
#undef COMPHELPER_UNWRAPARGS_MAX_ARGS
#undef COMPHELPER_UNWRAPARGS_make
#undef COMPHELPER_UNWRAPARGS_args
#undef COMPHELPER_UNWRAPARGS_extract
} // namespace comphelper
#endif // ! defined(COMPHELPER_UNWRAPARGS_HXX_INCLUDED)
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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