vector_view_space.hxx

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00001 #pragma once
00002 #ifndef OPENGM_VECTOR_VIEW_SPACE_HXX
00003 #define OPENGM_VECTOR_VIEW_SPACE_HXX
00004 
00006 
00007 #include <vector>
00008 #include <limits>
00009 
00010 #include "opengm/opengm.hxx"
00011 #include "opengm/graphicalmodel/space/space_base.hxx"
00012 
00013 namespace opengm {
00014 
00018 template<class I = std::size_t, class L = std::size_t>
00019 class VectorViewSpace
00020 : public SpaceBase<VectorViewSpace<I,L>,I,L>
00021 {
00022 public:
00023    typedef I IndexType;
00024    typedef L LabelType;
00025 
00026    VectorViewSpace();
00027    VectorViewSpace(const std::vector<LabelType>&);
00028    IndexType addVariable(const LabelType);
00029    IndexType numberOfVariables() const;
00030    LabelType numberOfLabels(const IndexType) const;
00031 
00032 private:
00033    std::vector<LabelType> const* numbersOfLabels_;
00034 };
00035 
00036 template<class I, class L>
00037 inline
00038 VectorViewSpace<I, L>::VectorViewSpace()
00039 :  numbersOfLabels_(NULL)
00040 {}
00041 
00042 template<class I, class L>
00043 inline
00044 VectorViewSpace<I, L>::VectorViewSpace
00045 (
00046    const std::vector<LabelType>& spaceVector
00047 )
00048 :  numbersOfLabels_(&spaceVector)
00049 {
00050    OPENGM_ASSERT(numbersOfLabels_->size()>0);
00051 }
00052 
00053 template<class I, class L>
00054 inline typename VectorViewSpace<I, L>::IndexType
00055 VectorViewSpace<I, L>::addVariable(
00056    const LabelType numberOfLabels
00057 ) {
00058    throw opengm::RuntimeError("attempt to add a variable to VectorViewSpace");
00059 }
00060 
00061 template<class I, class L>
00062 inline typename VectorViewSpace<I, L>::IndexType
00063 VectorViewSpace<I, L>::numberOfVariables() const
00064 {
00065    return static_cast<IndexType>(numbersOfLabels_->size());
00066 }
00067 
00068 template<class I, class L>
00069 inline typename VectorViewSpace<I, L>::LabelType
00070 VectorViewSpace<I, L>::numberOfLabels(
00071    const IndexType dimension
00072 ) const
00073 {
00074    OPENGM_ASSERT(dimension<numbersOfLabels_->size());
00075    return numbersOfLabels_->operator[](dimension);
00076 }
00077 
00078 } // namespace opengm
00079 
00081 
00082 #endif // #ifndef OPENGM_VECTOR_VIEW_SPACE_HXX