// C++ informative line for the emacs editor: -*- C++ -*-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
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 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
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 * help@hdfgroup.org.                                                        *
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#ifndef H5AbstractDs_H
#define H5AbstractDs_H

namespace H5 {

class ArrayType;
class CompType;
class EnumType;
class FloatType;
class IntType;
class StrType;
class VarLenType;
class DataSpace;

/*! \class AbstractDs
    \brief AbstractDs is an abstract base class, inherited by Attribute
     and DataSet.

    It provides a collection of services that are common to both Attribute
    and DataSet.
*/
class H5_DLLCPP AbstractDs {
  public:
    // Gets a copy the datatype of that this abstract dataset uses.
    // Note that this datatype is a generic one and can only be accessed
    // via generic member functions, i.e., member functions belong
    // to DataType.  To get specific datatype, i.e. EnumType, FloatType,
    // etc..., use the specific functions, that follow, instead.
    DataType getDataType() const;

    // Gets a copy of the specific datatype of this abstract dataset.
    ArrayType  getArrayType() const;
    CompType   getCompType() const;
    EnumType   getEnumType() const;
    IntType    getIntType() const;
    FloatType  getFloatType() const;
    StrType    getStrType() const;
    VarLenType getVarLenType() const;

    ///\brief Gets the size in memory of this abstract dataset.
    virtual size_t getInMemDataSize() const = 0;

    ///\brief Gets the dataspace of this abstract dataset - pure virtual.
    virtual DataSpace getSpace() const = 0;

    // Gets the class of the datatype that is used by this abstract
    // dataset.
    H5T_class_t getTypeClass() const;

    ///\brief Returns the amount of storage size required - pure virtual.
    virtual hsize_t getStorageSize() const = 0;

    // Returns this class name - pure virtual.
    virtual H5std_string fromClass() const = 0;

    // Destructor
    virtual ~AbstractDs();

  protected:
    // Default constructor
    AbstractDs();

  private:
    // This member function is implemented by DataSet and Attribute - pure virtual.
    virtual hid_t p_get_type() const = 0;

}; // end of AbstractDs
} // namespace H5

#endif // H5AbstractDs_H
