class HParamObj: public TNamed

_HADES_CLASS_DESCRIPTION


  HParamObj

  Class for parameters stored in binary format in Oracle and used as list
  elements in HParamList::paramList.

  The overloaded constructors and fill-functions accept single values or arrays of type
    UChar_t, Int_t, UInt_t, Float_t, Double_t, char_t, Text_t.
  The arguments for arrays are
      the name of the parameter
      the pointer to the array
      the length of the array
  The data are automatically converted to an UChar_t array.
  For classes also the class version is stored, for ROOT classes also the TStreamerInfo.

  The input and output data format of UInt_t variables or arrays is HEX format
    with leadings zeros, for example 0x0000ffff.



  HParamList

  Class for the generic Oracle and ASCII interface for parameter containers
  derived from HParCond

  The class contains a list to stores objects of type HParamObj
  The list objects store the name, the value, the parameter type and some
  additional information depending for the object type.

  All add/addObject functions add an initialized parameter to the list for
  writing. The functions create a new list element and copy the data into
  this object.
  Add functions:
    1. accepted basic types: Int_t, UInt_t, Float_t, Double_t, UChar_t
    2. accepted ROOT arrays: TArrayI, TArrayF, TArrayD, TArrayC
    3. accepted string: Text_t*
       This can be any text, for example also numbers in hexadecimal or
       scientific format. The number of characters must be specified (default 1).
  AddObject function:
    Accepts classes derived from TObject.
    The persistent data elements are streamed into an UChar_t array using the
    class streamer. For ROOT classes, for example histograms, the ROOT streamer
    info is stored in an additional binary array.

  All fill/fillObject functions convert the data in the list element back
  to the type of the parameter and copy them into the data element in the
  initialization process.
    1. Single parameters of basic type:
       The functions return kFALSE, if the parameter is not in the list.
    2. Arrays:
      a) If the array size is specified (return code Bool_t), the functions return
         kFALSE, if the number of data elements in the list objects is not the same.
      b) If the array size is not specified (return code Int_t), the array is
         recreated with the size of the number of data elements in the list object.
         The functions return the number of data elements or 0, if the parameter
         was not found.
    3. Classes:
       The class version is checked and a warning printed, if it is not identical
       with the current version (typically class version of list object higher than
       version in the actual parameter container). The class streamer takes care
       for backward compatibility. A warning is printed, if the ROOT version is
       different from the current version.
       The function returns the number of bytes in the list object or 0, if the
       parameter was not found in the list.