edu.washington.cs.knowitall.rule.constraint
Class PartConstraint

java.lang.Object
  edu.washington.cs.knowitall.rule.constraint.Constraint
      edu.washington.cs.knowitall.rule.constraint.CaptureConstraint
          edu.washington.cs.knowitall.rule.constraint.PartConstraint

public class PartConstraint
extends CaptureConstraint

While not strictly a constraint because the condition is always true, this constraint captures the specified extraction part. Thus it is useful as an argument constraint.

Author:

schmmd

Field Summary

Fields inherited from class edu.washington.cs.knowitall.rule.constraint.Constraint

part

Constructor Summary

PartConstraint(org.jdom.Element e)

PartConstraint(ExtractionPart part)

Method Summary

protected Boolean	check(TokenSequence extraction)
boolean	equals(Object other) Force subclasses to avoid pointer-based comparison.
List<Constraint>	generalize() Creates a list of constraints with constraint size reduced by exactly one.
int	hashCode() Force subclasses to avoid pointer-based comparison.
int	size() The size of a constraint is the count of subconstraints.
String	toString() Provides a base constraint representation.
org.jdom.Element	toXmlElement()
protected String	value(TokenSequence extraction)

Methods inherited from class edu.washington.cs.knowitall.rule.constraint.CaptureConstraint

value

Methods inherited from class edu.washington.cs.knowitall.rule.constraint.Constraint

check, create, create, create, fromXmlElement, getConstraintClass, simplify, subsumes, toString, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

PartConstraint

public PartConstraint(org.jdom.Element e)

PartConstraint

public PartConstraint(ExtractionPart part)

Method Detail

toString

public String toString()

Description copied from class: Constraint

Provides a base constraint representation. Constraint(part=LEFT)

Overrides:

toString in class Constraint

equals

public boolean equals(Object other)

Description copied from class: Constraint

Force subclasses to avoid pointer-based comparison.

Overrides:

equals in class Constraint

hashCode

public int hashCode()

Description copied from class: Constraint

Force subclasses to avoid pointer-based comparison.

Overrides:

hashCode in class Constraint

check

protected Boolean check(TokenSequence extraction)

Specified by:

check in class Constraint

Returns:

true if the constraint passes

value

protected String value(TokenSequence extraction)

Specified by:

value in class CaptureConstraint

Returns:

the matching string, or null

toXmlElement

public org.jdom.Element toXmlElement()

Overrides:

toXmlElement in class Constraint

generalize

public List<Constraint> generalize()

Description copied from class: Constraint

Creates a list of constraints with constraint size reduced by exactly one.

Specified by:

generalize in class Constraint

Returns:

size

public int size()

Description copied from class: Constraint

The size of a constraint is the count of subconstraints. Most constraints will have a size of one. However TermConstraint for example has a size equal to the number of restrictions it has.

Specified by:

size in class Constraint

Returns: