Teuchos_ConstNonconstObjectContainer.hpp

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00003 // 
00004 //                    Teuchos: Common Tools Package
00005 //                 Copyright (2004) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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00011 // it under the terms of the GNU Lesser General Public License as
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00028 
00029 #ifndef TEUCHOS_CONST_NONCONST_OBJECT_CONTAINER_HPP
00030 #define TEUCHOS_CONST_NONCONST_OBJECT_CONTAINER_HPP
00031 
00032 #include "Teuchos_RefCountPtr.hpp"
00033 
00034 namespace Teuchos {
00035 
00047 template<class ObjType>
00048 class ConstNonconstObjectContainer {
00049 public:
00051   ConstNonconstObjectContainer()
00052     :constObj_(null),isConst_(true) {}
00054   ConstNonconstObjectContainer( const RefCountPtr<ObjType> &obj )
00055     { initialize(obj); }
00057   ConstNonconstObjectContainer( const RefCountPtr<const ObjType> &obj )
00058     { initialize(obj); }
00061   void initialize( const RefCountPtr<ObjType> &obj )
00062     { TEST_FOR_EXCEPT(!obj.get()); constObj_=obj; isConst_=false; }
00065   void initialize( const RefCountPtr<const ObjType> &obj )
00066     { TEST_FOR_EXCEPT(!obj.get()); constObj_=obj; isConst_=true; }
00068   void uninitialize()
00069     { constObj_=null; isConst_=true; }
00071   bool isConst() const
00072     { return isConst_; }
00086   RefCountPtr<ObjType> getNonconstObj()
00087     {
00088       TEST_FOR_EXCEPTION(
00089         constObj_.get() && isConst_, std::logic_error
00090         ,"Error, the object of reference type \""<<typeid(ObjType).name()<<"\" was given "
00091         "as a const-only object and non-const access is not allowed."
00092         );
00093       return rcp_const_cast<ObjType>(constObj_);
00094     }
00100   RefCountPtr<const ObjType> getConstObj() const
00101     { return constObj_; }
00103   RefCountPtr<const ObjType> operator()() const
00104     { return getConstObj(); }
00105   
00106 private:
00107   RefCountPtr<const ObjType>   constObj_;
00108   bool                         isConst_;
00109 };
00110 
00111 } // namespace Teuchos
00112 
00113 
00114 #endif // TEUCHOS_CONST_NONCONST_OBJECT_CONTAINER_HPP

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