comphelper/source/misc/querydeep.cxx

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  27
  28 // MARKER(update_precomp.py): autogen include statement, do not remove
  29 #include "precompiled_comphelper.hxx"
  30 #include <comphelper/querydeep.hxx>
  31 #include <typelib/typedescription.h>
  32
  33 //__________________________________________________________________________________________________
  34
  35 sal_Bool comphelper::isDerivedFrom(
  36     const ::com::sun::star::uno::Type & rBaseType,
  37     const ::com::sun::star::uno::Type & rType )
  38 {
  39     using namespace ::com::sun::star::uno;
  40
  41     TypeClass eClass = rBaseType.getTypeClass();
  42
  43     if (eClass != TypeClass_INTERFACE)
  44         return sal_False;
  45
  46     // supported TypeClass - do the types match ?
  47     if (eClass != rType.getTypeClass())
  48         return sal_False;
  49
  50     sal_Bool bRet;
  51
  52     // shortcut for simple case
  53     if (rBaseType == ::getCppuType(static_cast<const Reference< XInterface > *>(0)))
  54     {
  55         bRet = sal_True;
  56     }
  57     else
  58     {
  59         // now ask in cppu (aka typelib)
  60         ::typelib_TypeDescription *pBaseTD = 0, *pTD = 0;
  61
  62         rBaseType.  getDescription(&pBaseTD);
  63         rType.      getDescription(&pTD);
  64
  65         // interfaces are assignable to a base
  66         bRet = ::typelib_typedescription_isAssignableFrom(pBaseTD, pTD);
  67
  68         ::typelib_typedescription_release(pBaseTD);
  69         ::typelib_typedescription_release(pTD);
  70     }
  71
  72     return bRet;
  73 }
  74
  75
  76