comphelper/source/misc/querydeep.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_comphelper.hxx"
  33 #include <comphelper/querydeep.hxx>
  34 #include <typelib/typedescription.h>
  35
  36 //__________________________________________________________________________________________________
  37
  38 sal_Bool comphelper::isDerivedFrom(
  39     const ::com::sun::star::uno::Type & rBaseType,
  40     const ::com::sun::star::uno::Type & rType )
  41 {
  42     using namespace ::com::sun::star::uno;
  43
  44     TypeClass eClass = rBaseType.getTypeClass();
  45
  46     if (eClass != TypeClass_INTERFACE)
  47         return sal_False;
  48
  49     // supported TypeClass - do the types match ?
  50     if (eClass != rType.getTypeClass())
  51         return sal_False;
  52
  53     sal_Bool bRet;
  54
  55     // shortcut for simple case
  56     if (rBaseType == ::getCppuType(static_cast<const Reference< XInterface > *>(0)))
  57     {
  58         bRet = sal_True;
  59     }
  60     else
  61     {
  62         // now ask in cppu (aka typelib)
  63         ::typelib_TypeDescription *pBaseTD = 0, *pTD = 0;
  64
  65         rBaseType.      getDescription(&pBaseTD);
  66         rType.          getDescription(&pTD);
  67
  68         // interfaces are assignable to a base
  69         bRet = ::typelib_typedescription_isAssignableFrom(pBaseTD, pTD);
  70
  71         ::typelib_typedescription_release(pBaseTD);
  72         ::typelib_typedescription_release(pTD);
  73     }
  74
  75     return bRet;
  76 }
  77
  78
  79