/*************************************************************************

Copyright Rice University, 2004-2011.
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**************************************************************************/

#ifndef __RVL_LDCREDN
#define __RVL_LDCREDN

#include "localdata.hh"

namespace RVL {
  
  /** Local FOCE */
  template<typename DataType>
  class LocalConstEval {
  public:
    virtual ~LocalConstEval() {}
    /** Eval method for LDCs */    
    virtual void operator()(vector<LocalDataContainer<DataType> const *> & sources) = 0;
  };

  /** Unary Local FOCE with templated return type interface.  */
  template<typename DataType>
  class UnaryLocalConstEval
    : public LocalConstEval<DataType> {
  public:
    virtual ~UnaryLocalConstEval() {}

    /** Evaluation method for LDCs */
    virtual void operator()(LocalDataContainer<DataType> const & source) = 0;

    /** Generic evaluation method */
    void operator()(vector<LocalDataContainer<DataType> const *> & sources) {
      try {
	if (sources.size() != 1) {
	  RVLException e;
	  e<<"Error: UnaryLocalConstEval::opeartor() (generic)\n";
	  e<<"input length != 1\n";
	  throw e;
	}
	return (*this)(*(sources[0]));
      }
      catch (RVLException & e) {
	e<<"\ncalled from UnaryLocalConstEval::operator() (generic)\n";
	throw e;
      }
    }

  };

  /** Binary Local FOCE with templated return type interface.  */
  template<typename DataType>
  class BinaryLocalConstEval
    : public LocalConstEval<DataType>  {
  public:
    virtual ~BinaryLocalConstEval() {}

    /** Evaluation method for LDCs */
    virtual void operator () (LocalDataContainer<DataType> const & source1,
			      LocalDataContainer<DataType> const & source2) = 0;

    /** Generic evaluation method */
    void operator()(vector<LocalDataContainer<DataType> const *> & sources) {
      try {
	if (sources.size() != 2) {
	  RVLException e;
	  e<<"Error: BinaryLocalConstEval::opeartor() (generic)\n";
	  e<<"input length != 2\n";
	  throw e;
	}
	(*this)(*(sources[0]),*(sources[1]));
      }
      catch (RVLException & e) {
	e<<"\ncalled from BinaryLocalConstEval::operator() (generic)\n";
	throw e;
      }
    }
  };

  /** Ternary Local FOCE with templated return type interface.  */
  template<typename DataType, typename ValType = DataType>
  class TernaryLocalConstEval
    : public LocalConstEval<DataType> {
  public:
    virtual ~TernaryLocalConstEval() {}

    /** Evaluation method for LDCs */
    virtual void operator () (LocalDataContainer<DataType> const & source1,
			      LocalDataContainer<DataType> const & source2,
			      LocalDataContainer<DataType> const & source3) = 0;

    /** Generic evaluation method */
    void operator()(vector<LocalDataContainer<DataType> const *> & sources) {
      try {
	if (sources.size() != 3) {
	  RVLException e;
	  e<<"Error: TernaryLocalConstEval::operator() (generic)\n";
	  e<<"input length != 3\n";
	  throw e;
	}
	(*this)(*(sources[0]),*(sources[1]),*(sources[2]));
      }
      catch (RVLException & e) {
	e<<"\ncalled from TernaryLocalConstEval::operator() (generic)\n";
	throw e;
      }
    }

  };

  /** Quaternary Local FOCE with templated return type interface.  */
  template<typename DataType>
  class QuaternaryLocalConstEval
    : public LocalConstEval<DataType> {
  public:
    virtual ~QuaternaryLocalConstEval() {}

    /** Evaluation method for LDCs */
    virtual void operator () (LocalDataContainer<DataType> const & source1,
			      LocalDataContainer<DataType> const & source2,
			      LocalDataContainer<DataType> const & source3,
			      LocalDataContainer<DataType> const & source4) = 0;

    /** Generic evaluation method */
    void operator()(vector<LocalDataContainer<DataType> const *> & sources) {
      try {
	if (sources.size() != 4) {
	  RVLException e;
	  e<<"Error: QuaternaryLocalConstEval::opeartor() (generic)\n";
	  e<<"input length != 3\n";
	  throw e;
	}
	(*this)(*(sources[0]),*(sources[1]),*(sources[2]),*(sources[3]));
      }
      catch (RVLException & e) {
	e<<"\ncalled from QuaternaryLocalConstEval::operator() (generic)\n";
	throw e;
      }
    }
  };

  /** local const eval hierarchy. use for evaluations without
      templated reduction types - for example, when reduction target
      is external, accessed by reference. */

  template<typename DataType>
  class UnaryLocalFunctionObjectConstEval
    : public FunctionObjectConstEval, public UnaryLocalConstEval<DataType> {
  public:
    virtual ~UnaryLocalFunctionObjectConstEval() {}
  };

  template<typename DataType>
  class BinaryLocalFunctionObjectConstEval
    : public FunctionObjectConstEval, public BinaryLocalConstEval<DataType> {
  public:
    virtual ~BinaryLocalFunctionObjectConstEval() {}
  };

  template<typename DataType>
  class TernaryLocalFunctionObjectConstEval
    : public FunctionObjectConstEval, public TernaryLocalConstEval<DataType> {
  public:
    virtual ~TernaryLocalFunctionObjectConstEval() {}
  };

  template<typename DataType>
  class QuaternaryLocalFunctionObjectConstEval
    : public FunctionObjectConstEval, public QuaternaryLocalConstEval<DataType> {
  public:
    virtual ~QuaternaryLocalFunctionObjectConstEval() {}
  };

  /** local reduction function object hierarchy */

  template<typename DataType, typename ValType>
  class UnaryLocalFunctionObjectScalarRedn
    : public FunctionObjectScalarRedn<ValType>, public UnaryLocalConstEval<DataType> {
  private:
    UnaryLocalFunctionObjectScalarRedn();
  public:
    UnaryLocalFunctionObjectScalarRedn(ValType val)
      : FunctionObjectScalarRedn<ValType>(val) {}
    UnaryLocalFunctionObjectScalarRedn(UnaryLocalFunctionObjectScalarRedn<DataType,ValType> const & f) 
      : FunctionObjectScalarRedn<ValType>(f) {}
    virtual ~UnaryLocalFunctionObjectScalarRedn() {}
  };

  template<typename DataType, typename ValType>
  class BinaryLocalFunctionObjectScalarRedn
    : public FunctionObjectScalarRedn<ValType>, public BinaryLocalConstEval<DataType> {
  private:
    BinaryLocalFunctionObjectScalarRedn();
  public:
    BinaryLocalFunctionObjectScalarRedn(ValType val)
      : FunctionObjectScalarRedn<ValType>(val) {}
    BinaryLocalFunctionObjectScalarRedn(BinaryLocalFunctionObjectScalarRedn<DataType,ValType> const & f) 
      : FunctionObjectScalarRedn<ValType>(f) {}
    virtual ~BinaryLocalFunctionObjectScalarRedn() {}
  };

  template<typename DataType, typename ValType>
  class TernaryLocalFunctionObjectScalarRedn
    : public FunctionObjectScalarRedn<ValType>, public TernaryLocalConstEval<DataType> {
  private:
    TernaryLocalFunctionObjectScalarRedn();
  public:
    TernaryLocalFunctionObjectScalarRedn(ValType val)
      : FunctionObjectScalarRedn<ValType>(val) {}
    TernaryLocalFunctionObjectScalarRedn(TernaryLocalFunctionObjectScalarRedn<DataType,ValType> const & f) 
      : FunctionObjectScalarRedn<ValType>(f) {}
    virtual ~TernaryLocalFunctionObjectScalarRedn() {}
  };

  template<typename DataType, typename ValType>
  class QuaternaryLocalFunctionObjectScalarRedn
    : public FunctionObjectScalarRedn<ValType>, public QuaternaryLocalConstEval<DataType> {
  private:
    QuaternaryLocalFunctionObjectScalarRedn();
  public:
    QuaternaryLocalFunctionObjectScalarRedn(ValType val)
      : FunctionObjectScalarRedn<ValType>(val) {}
    QuaternaryLocalFunctionObjectScalarRedn(QuaternaryLocalFunctionObjectScalarRedn<DataType,ValType> const & f) 
      : FunctionObjectScalarRedn<ValType>(f) {}
    virtual ~QuaternaryLocalFunctionObjectScalarRedn() {}
  };

}

#endif