org.egothor.query.runner
Class AndRunner

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

Direct Known Subclasses:

AndRunner

public class AndRunner
extends Runner

The AndRunner object represents a binary form of the boolean AND formula. For example, the user may wish to view documents containing the words BASS and GUITAR. The form of this query would be given as:

BASS&&GUITAR.

Author:

Leo Galambos

Field Summary

Runner	a Description of the Field
Runner	b Description of the Field

Constructor Summary

AndRunner(Runner a, Runner b)
Constructor for the AndRunner object.

Method Summary

int	evaluate(long uid) Return the calculated similarity between this query and 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 Runner a

Description of the Field

b

public Runner b

Description of the Field

Constructor Detail

AndRunner

public AndRunner(Runner a,
                 Runner b)

Constructor for the AndRunner object.

Parameters:

a - the Runner for the first query

b - the Runner for the second query

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 calculated similarity between this query and the document with the given unique ID. When any of the formula variables returns a non-positive value, then the evaluation is 0.

Specified by:

evaluate in class Runner

Parameters:

uid - the unique id of the document

Returns:

0 if a variable is less than 0, or an integer resulting from the formula described in the code