localdata.hh

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#ifndef __RVL_LDC
#define __RVL_LDC

#include "data.hh"

namespace RVL {

  template<class DataType>
  class LocalEvaluation;

  template<class DataType>
  class LocalConstEval;

  template<class DataType>
  class LocalDataContainer: public DataContainer {

  public:

    LocalDataContainer() {}
    LocalDataContainer(const LocalDataContainer<DataType> & D) {}
    virtual ~LocalDataContainer() {}
  
    virtual size_t getSize() const = 0;

    virtual DataType * getData() = 0;

    virtual DataType const * getData() const = 0;

    void eval(FunctionObject & f,
          vector<DataContainer const *> & x) {
      try {
    vector<LocalDataContainer<DataType> const *> lx(x.size());
    for (size_t i=0;i<x.size();i++) {
      if (!(lx[i] = dynamic_cast<LocalDataContainer<DataType> const *>(x[i]))) {
        RVLException e;
        e<<"Error: LocalDataContainer::eval(FO,...)\n";
        e<<"at least one of the input DCs is not an LDC\n";
        throw e;
      }
    }
    LocalEvaluation<DataType> & lf 
      = dynamic_cast<LocalEvaluation<DataType> &>(f);
    lf(*this,lx);
      }
      catch (bad_cast) {
    RVLException e;
    e<<"Error: LocalDataContainer::eval(FO,...)\n";
    e<<"FO is not an LFO\n";
    throw e;
      } 
      catch (RVLException & e) {
    e<<"\ncalled from LocalDataContainer::eval\n";
    throw e;
      }
    }

    void eval(FunctionObjectConstEval & f,
          vector<DataContainer const *> & x) const {
      try {
    vector<LocalDataContainer<DataType> const *> ex(x.size()+1);
    ex[0]=this;
    for (size_t i=0;i<x.size();i++) {
      if (!(ex[i+1] = dynamic_cast<LocalDataContainer<DataType> const *>(x[i]))) {
        RVLException e;
        e<<"Error: LocalDataContainer::eval(FO,...)\n";
        e<<"at least one of the input DCs is not an LDC\n";
        throw e;
      }
    }
    LocalConstEval<DataType> & lf 
      = dynamic_cast<LocalConstEval<DataType> &>(f);
    lf(ex);
      }
      catch (RVLException & e) {
    e<<"\ncalled from LocalDataContainer::eval(...) const\n";
    throw e;
      }
    }
  };

  template<class DataType>
  class LocalDataContainerFactory: public DataContainerFactory {

  public:

    LocalDataContainerFactory() {}
    LocalDataContainerFactory( LocalDataContainerFactory<DataType> &) {}
    virtual ~LocalDataContainerFactory() {}

    virtual LocalDataContainer<DataType> * buildLocal() const = 0;

    DataContainer * build() const { return buildLocal(); }

    virtual size_t getSize() const = 0;

  };


  template<class DataType>
  class LocalDataContainerSection: public LocalDataContainer<DataType> {

  private:
    LocalDataContainer<DataType> & src;
    size_t begin;
    size_t length;

    LocalDataContainerSection() {}

  public:
    LocalDataContainerSection(const LocalDataContainerSection<DataType> & D)
      :src(D.src), begin(D.begin), length(D.length) {}
    LocalDataContainerSection(LocalDataContainer<DataType> & _src,
                  size_t _begin,
                  size_t _length)
      : src(_src), begin(_begin), length(_length) {
      if (begin+length>src.getSize()) {
    RVLException e;
    e<<"Error: LocalDataContainerSection constructor\n";
    e<<"section overruns end of source LDC\n";
    e<<"length of source LDC = "<<src.getSize()<<"\n";
    e<<"begin index = "<<begin<<" length of section = "<<length<<"\n";
    throw e;
      } 
    }
    virtual ~LocalDataContainerSection() {}
  
    size_t getSize() const { return length; }
    DataType * getData() { return &((src.getData())[begin]); }
    DataType const * getData() const { return &((src.getData())[begin]); }

    ostream & write(ostream & str) const {
      str<<"LocalDataContainerSection object\n";
      str<<"LDC view of section beginning at "<<begin<<" of length "<<length<<" of\n";
      str<<"elements:\n";
      for (size_t i=0;i<length;i++) {
    str<<"index = "<<i<<" value = "<<getData()[i]<<"\n";
      }
      return str;
    }
  };
  
}

#endif

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