include/comphelper/unwrapargs.hxx

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  19
  20 #ifndef INCLUDED_COMPHELPER_UNWRAPARGS_HXX
  21 #define INCLUDED_COMPHELPER_UNWRAPARGS_HXX
  22
  23 #include <rtl/ustrbuf.hxx>
  24 #include <com/sun/star/uno/Sequence.hxx>
  25 #include <com/sun/star/uno/XInterface.hpp>
  26 #include <com/sun/star/lang/IllegalArgumentException.hpp>
  27 #include <cppu/unotype.hxx>
  28 #include <boost/optional.hpp>
  29
  30 namespace comphelper {
  31
  32 /// @internal
  33 namespace detail {
  34     inline void unwrapArgsError(
  35         const OUString& str, sal_Int32 nArg,
  36         const css::uno::Reference< css::uno::XInterface >& xErrorContext =
  37           css::uno::Reference< css::uno::XInterface >() )
  38     {
  39         throw css::lang::IllegalArgumentException(
  40             str, xErrorContext, static_cast< sal_Int16 >( nArg ) );
  41     }
  42
  43     template< typename T, typename... Args >
  44     inline void unwrapArgsError( const OUString& str, sal_Int32 nArg, T&, Args&... args )
  45     {
  46         return unwrapArgsError( str, nArg, args... );
  47     }
  48
  49     inline void unwrapArgs(
  50         const css::uno::Sequence< css::uno::Any >&,
  51         sal_Int32,
  52         const css::uno::Reference< css::uno::XInterface >& )
  53     {
  54         return;
  55     }
  56
  57     inline void unwrapArgs(
  58         const css::uno::Sequence< css::uno::Any >&,
  59         sal_Int32 )
  60     {
  61         return;
  62     }
  63
  64     template< typename T, typename... Args >
  65     inline void unwrapArgs(
  66         const css::uno::Sequence< css::uno::Any >& seq,
  67         sal_Int32 nArg, ::boost::optional< T >& v, Args&... args );
  68
  69     template< typename T, typename... Args >
  70     inline void unwrapArgs(
  71         const css::uno::Sequence< css::uno::Any >& seq,
  72         sal_Int32 nArg, T& v, Args&... args )
  73     {
  74         if( seq.getLength() <= nArg )
  75         {
  76             return unwrapArgsError( OUString( "No such argument available!"),
  77                                      nArg, args... );
  78         }
  79         if( !fromAny( seq[nArg], &v ) )
  80         {
  81             OUStringBuffer buf;
  82             buf.append( "Cannot extract ANY { " );
  83             buf.append( seq[nArg].getValueType().getTypeName() );
  84             buf.append( " } to " );
  85             buf.append( ::cppu::UnoType<T>::get().getTypeName() );
  86             buf.append( u'!' );
  87             return unwrapArgsError( buf.makeStringAndClear(), nArg, args... );
  88         }
  89         return unwrapArgs( seq, ++nArg, args... );
  90     }
  91
  92     template< typename T, typename... Args >
  93     inline void unwrapArgs(
  94         const css::uno::Sequence< css::uno::Any >& seq,
  95         sal_Int32 nArg, ::boost::optional< T >& v, Args&... args )
  96     {
  97         if( nArg < seq.getLength() )
  98         {
  99             T t;
 100             unwrapArgs( seq, nArg, t, args... );
 101             v = t;
 102         } else {
 103             unwrapArgs( seq, ++nArg, args... );
 104         }
 105     }
 106 }
 107
 108 template< typename... Args >
 109 inline void unwrapArgs(
 110     const css::uno::Sequence< css::uno::Any >& seq,
 111     Args&... args )
 112 {
 113     return detail::unwrapArgs( seq, 0, args... );
 114 }
 115
 116 } // namespace comphelper
 117
 118 #endif //  ! defined( INCLUDED_COMPHELPER_UNWRAPARGS_HXX)
 119
 120 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */