org.egothor.query.runner
Class ProxRunner

java.lang.Object
  org.egothor.core.query.Runner
      org.egothor.query.runner.ProxRunner

Direct Known Subclasses:

ProxRunner

public class ProxRunner
extends Runner

The ProxRunner class is used when a user wishes to make a query involving two terms where the 2^nd term must lie within n words of the 1^st . For example, a user might wish to view documents where BASS lies within 2 words of GUITAR. This query would be given in the form:

(BASS 2 GUITAR) (the parentheses are required).

Author:

Leo Galambos

Field Summary

TermRunner	a Description of the Field
TermRunner	b Description of the Field
int	diff Description of the Field
int[]	prox_a Description of the Field
int[]	prox_b Description of the Field

Constructor Summary

ProxRunner(TermRunner a, TermRunner b, int diff)
Constructor for the ProxRunner object

Method Summary

int	evaluate(long uid) Return the similarity of this object to the document with the given unique ID.
java.lang.String	invalidReason() Return an explanation as to why this search is invalid.
int	terms() Description of the Method

Methods inherited from class org.egothor.core.query.Runner

run

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

a

public TermRunner a

Description of the Field

b

public TermRunner b

Description of the Field

diff

public int diff

Description of the Field

prox_a

public int[] prox_a

Description of the Field

prox_b

public int[] prox_b

Description of the Field

Constructor Detail

ProxRunner

public ProxRunner(TermRunner a,
                  TermRunner b,
                  int diff)

Constructor for the ProxRunner object

Parameters:

a - the Runner for the first term

b - the Runner for the second term

diff - Description of the Parameter

Method Detail

terms

public int terms()

Description of the Method

Specified by:

terms in class Runner

Returns:

Description of the Return Value

invalidReason

public java.lang.String invalidReason()

Return an explanation as to why this search is invalid.

Specified by:

invalidReason in class Runner

Returns:

a String containing an explanation

evaluate

public int evaluate(long uid)

Return the similarity of this object to the document with the given unique ID. When any of formula variables returns non-positive value, then the evaluation is 0.

Specified by:

evaluate in class Runner

Parameters:

uid - the document in question

Returns:

the similarity