CQueryNormalizer Class Reference

#include <CQueryNormalizer.h>

Inheritance diagram for CQueryNormalizer:

List of all members.

Public Member Functions
	CQueryNormalizer (const CAcInvertedFile *inAccessor=0)
void	setAccessor (const CAcInvertedFile *inAccessor)
virtual void	reset ()
virtual double	getValue () const
	Translating the information into a normalizing value in the end.
virtual void	considerQueryFeature (const CWeightingFunction &inFeature)
	Considers a feature.
virtual CQueryNormalizer *	clone () const
Protected Attributes
double	mValue
const CAcInvertedFile *	mAccessor

---

Detailed Description

For normalizing weights like in Salton/Buckley we need to now all the features in the query or all the features in a document. This base class is supposed to handle both.

For getting additional information it needs to know the accessor.

Definition at line 55 of file CQueryNormalizer.h.

---

Constructor & Destructor Documentation

CQueryNormalizer::CQueryNormalizer

(

const CAcInvertedFile *

inAccessor = 0

)

Definition at line 53 of file CQueryNormalizer.cc.

References reset().

                                                                   :
  mAccessor(inAccessor){
    reset();
};

---

Member Function Documentation

void CQueryNormalizer::setAccessor

(

const CAcInvertedFile *

inAccessor

)

Definition at line 72 of file CQueryNormalizer.cc.

References mAccessor.

Referenced by CWeighter::setAccessor().

                                                                   {
  mAccessor=
    inAccessor;
};

void CQueryNormalizer::reset

(

)

[virtual]

Definition at line 90 of file CQueryNormalizer.cc.

References mValue.

Referenced by CQueryNormalizer().

                            {
  mValue=0;
}

double CQueryNormalizer::getValue

(

)

const [virtual]

Translating the information into a normalizing value in the end.

Reimplemented in CQNNoNormalization.

Definition at line 107 of file CQueryNormalizer.cc.

References mValue.

Referenced by CWeightingFunction::applyOnThis(), and CWFBestFullyWeighted::subApply().

                                      {
  return mValue;
}

void CQueryNormalizer::considerQueryFeature

(

const CWeightingFunction &

inFeature

)

[virtual]

Considers a feature.

Reimplemented in CQNBestFullyWeighted, CQNEuclideanLengthSquare, CQNMaxDocumentFrequency, CQNNoNormalization, and CQNSquareDFLogICFSum.

Definition at line 124 of file CQueryNormalizer.cc.

References THIS_SHOULD_NEVER_BE_CALLED.

Referenced by CQInvertedFile::buildNormalizedQueryHash().

                        {
#define THIS_SHOULD_NEVER_BE_CALLED 0
  assert(THIS_SHOULD_NEVER_BE_CALLED);
};

CQueryNormalizer * CQueryNormalizer::clone

(

)

const [virtual]

clone: This permits us to store completely preconfiguered normalizers and use them when needed

modification history

Reimplemented in CQNBestFullyWeighted, CQNEuclideanLengthSquare, CQNMaxDocumentFrequency, CQNNoNormalization, and CQNSquareDFLogICFSum.

Definition at line 95 of file CQNBestFullyWeighted.cc.

Referenced by CWeighter::clone().

                                                  {
    return new CQNBestFullyWeighted(*this);
}

---

Member Data Documentation

double CQueryNormalizer::mValue [protected]

Definition at line 65 of file CQueryNormalizer.h.

Referenced by CQNSquareDFLogICFSum::considerQueryFeature(), CQNMaxDocumentFrequency::considerQueryFeature(), CQNEuclideanLengthSquare::considerQueryFeature(), CQNBestFullyWeighted::considerQueryFeature(), getValue(), and reset().

const CAcInvertedFile* CQueryNormalizer::mAccessor [protected]

Definition at line 72 of file CQueryNormalizer.h.

Referenced by CQNSquareDFLogICFSum::considerQueryFeature(), and setAccessor().

---

The documentation for this class was generated from the following files:

• gift/libGIFTQuInvertedFile/include/CQueryNormalizer.h
• gift/libGIFTQuInvertedFile/cc/CQNBestFullyWeighted.cc
• gift/libGIFTQuInvertedFile/cc/CQueryNormalizer.cc