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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef COMPHELPER_UNWRAPARGS_HXX_INCLUDED
21 : #define COMPHELPER_UNWRAPARGS_HXX_INCLUDED
22 :
23 : #include "rtl/ustrbuf.hxx"
24 : #include "com/sun/star/uno/Sequence.hxx"
25 : #include "com/sun/star/lang/IllegalArgumentException.hpp"
26 : #include "boost/optional.hpp"
27 : #include "boost/preprocessor/cat.hpp"
28 : #include "boost/preprocessor/repetition.hpp"
29 : #include "boost/preprocessor/arithmetic/add.hpp"
30 : #include "cppu/unotype.hxx"
31 :
32 : namespace comphelper {
33 :
34 : //
35 : // generating helper functions to unwrap the service's argument sequence:
36 : //
37 :
38 : /// @internal
39 : namespace detail {
40 :
41 : template <typename T>
42 0 : inline void extract(
43 : ::com::sun::star::uno::Sequence< ::com::sun::star::uno::Any> const& seq,
44 : sal_Int32 nArg, T & v,
45 : ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>
46 : const& xErrorContext )
47 : {
48 0 : if (nArg >= seq.getLength()) {
49 : throw ::com::sun::star::lang::IllegalArgumentException(
50 : ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
51 : "No such argument available!") ),
52 0 : xErrorContext, static_cast<sal_Int16>(nArg) );
53 : }
54 0 : if (! (seq[nArg] >>= v)) {
55 0 : ::rtl::OUStringBuffer buf;
56 0 : buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("Cannot extract ANY { ") );
57 0 : buf.append( seq[nArg].getValueType().getTypeName() );
58 0 : buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" } to ") );
59 0 : buf.append( ::cppu::UnoType<T>::get().getTypeName() );
60 0 : buf.append( static_cast<sal_Unicode>('!') );
61 : throw ::com::sun::star::lang::IllegalArgumentException(
62 : buf.makeStringAndClear(), xErrorContext,
63 0 : static_cast<sal_Int16>(nArg) );
64 : }
65 0 : }
66 :
67 : template <typename T>
68 0 : inline void extract(
69 : ::com::sun::star::uno::Sequence< ::com::sun::star::uno::Any> const& seq,
70 : sal_Int32 nArg, ::boost::optional<T> & v,
71 : ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>
72 : const& xErrorContext )
73 : {
74 0 : if (nArg < seq.getLength()) {
75 0 : T t;
76 0 : extract( seq, nArg, t, xErrorContext );
77 0 : v.reset( t );
78 : }
79 0 : }
80 :
81 : } // namespace detail
82 :
83 : #define COMPHELPER_UNWRAPARGS_extract(z_, n_, unused_) \
84 : detail::extract( seq, n_, BOOST_PP_CAT(v, n_), xErrorContext );
85 : #define COMPHELPER_UNWRAPARGS_args(z_, n_, unused_) \
86 : BOOST_PP_CAT(T, n_) & BOOST_PP_CAT(v, n_)
87 :
88 : /** The following preprocessor repetitions generate functions like
89 :
90 : <pre>
91 : template <typename T0, typename T1, ...>
92 : inline void unwrapArgs(
93 : uno::Sequence<uno::Any> const& seq,
94 : T0 & v0, T1 & v1, ...,
95 : css::uno::Reference<css::uno::XInterface> const& xErrorContext =
96 : css::uno::Reference<css::uno::XInterface>() );
97 : </pre>
98 : (full namespace qualification ::com::sun::star has been omitted
99 : for brevity)
100 :
101 : which unwraps the passed sequence's elements, assigning them to the
102 : referenced values. Specify optional arguments as boost::optional<T>.
103 : If the length of the sequence is greater than the count of arguments,
104 : then the latter sequence elements are ignored.
105 : If too few arguments are given in the sequence and a missing argument is
106 : no boost::optional<T>, then an lang::IllegalArgumentException is thrown
107 : with the specified xErrorContext (defaults to null-ref).
108 :
109 : The maximum number of service declarations can be set by defining
110 : COMPHELPER_UNWRAPARGS_MAX_ARGS; its default is 12.
111 : */
112 : #define COMPHELPER_UNWRAPARGS_make(z_, n_, unused_) \
113 : template < BOOST_PP_ENUM_PARAMS( BOOST_PP_ADD(n_, 1), typename T) > \
114 : inline void unwrapArgs( \
115 : ::com::sun::star::uno::Sequence< ::com::sun::star::uno::Any > const& seq, \
116 : BOOST_PP_ENUM(BOOST_PP_ADD(n_, 1), COMPHELPER_UNWRAPARGS_args, ~), \
117 : ::com::sun::star::uno::Reference< \
118 : ::com::sun::star::uno::XInterface> const& xErrorContext = \
119 : ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>() ) \
120 : { \
121 : BOOST_PP_REPEAT(BOOST_PP_ADD(n_, 1), COMPHELPER_UNWRAPARGS_extract, ~) \
122 : }
123 :
124 : #ifndef COMPHELPER_UNWRAPARGS_MAX_ARGS
125 : #define COMPHELPER_UNWRAPARGS_MAX_ARGS 12
126 : #endif
127 :
128 0 : BOOST_PP_REPEAT(COMPHELPER_UNWRAPARGS_MAX_ARGS, COMPHELPER_UNWRAPARGS_make, ~)
129 :
130 : #undef COMPHELPER_UNWRAPARGS_MAX_ARGS
131 : #undef COMPHELPER_UNWRAPARGS_make
132 : #undef COMPHELPER_UNWRAPARGS_args
133 : #undef COMPHELPER_UNWRAPARGS_extract
134 :
135 : } // namespace comphelper
136 :
137 : #endif // ! defined(COMPHELPER_UNWRAPARGS_HXX_INCLUDED)
138 :
139 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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