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

java.lang.Object
  edu.washington.cs.knowitall.rule.constraint.Constraint
      edu.washington.cs.knowitall.rule.constraint.CaptureConstraint
          edu.washington.cs.knowitall.rule.constraint.AbstractPatternConstraint
              edu.washington.cs.knowitall.rule.constraint.PatternConstraint
                  edu.washington.cs.knowitall.rule.constraint.SequenceConstraint

public class SequenceConstraint
extends PatternConstraint

Constrains based on a sequence of adjacent TermConstraints.

Author:

schmmd

Field Summary

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

expression

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

part

Constructor Summary

SequenceConstraint(org.jdom.Element e)

SequenceConstraint(ExtractionPart part, Collection<TermConstraint> constraints)

Method Summary

protected edu.washington.cs.knowitall.commonlib.ArraySet<TermConstraint>	buildConstraints(org.jdom.Element e)
String	deserializePattern(org.jdom.Element e) Constructs a pattern expression from an element.
boolean	equals(Object other) Force subclasses to avoid pointer-based comparison.
List<Constraint>	generalize() Simplify this constraint one step.
int	hashCode() Force subclasses to avoid pointer-based comparison.
Constraint	simplify() Returns null if there are no constraints.
int	size() The size of a constraint is the count of subconstraints.
List<TermConstraint>	subconstraints() Return an ordered list of the subconstraints that make up this sequence constraint.
String	toString() Provides a base constraint representation.
org.jdom.Element	toXmlElement()

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

check, getString, value

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, subsumes, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SequenceConstraint

public SequenceConstraint(org.jdom.Element e)

SequenceConstraint

public SequenceConstraint(ExtractionPart part,
                          Collection<TermConstraint> constraints)

Method Detail

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.

Overrides:

size in class PatternConstraint

Returns:

equals

public boolean equals(Object other)

Description copied from class: Constraint

Force subclasses to avoid pointer-based comparison.

Overrides:

equals in class PatternConstraint

toString

public String toString()

Description copied from class: Constraint

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

Overrides:

toString in class Constraint

hashCode

public int hashCode()

Description copied from class: Constraint

Force subclasses to avoid pointer-based comparison.

Overrides:

hashCode in class Constraint

simplify

public Constraint simplify()

Returns null if there are no constraints. Otherwise, simplify each term constraint.

Overrides:

simplify in class Constraint

Returns:

the simplified constraint

subconstraints

public List<TermConstraint> subconstraints()

Return an ordered list of the subconstraints that make up this sequence constraint.

Returns:

generalize

public List<Constraint> generalize()

Simplify this constraint one step. A SequenceConstraint is generalized by removing a term constraint from the beginning or end, or by simplifying a single term constraint.

Overrides:

generalize in class PatternConstraint

Returns:

buildConstraints

protected edu.washington.cs.knowitall.commonlib.ArraySet<TermConstraint> buildConstraints(org.jdom.Element e)

deserializePattern

public String deserializePattern(org.jdom.Element e)

Description copied from class: AbstractPatternConstraint

Constructs a pattern expression from an element.

Overrides:

deserializePattern in class AbstractPatternConstraint

Returns:

toXmlElement

public org.jdom.Element toXmlElement()

Overrides:

toXmlElement in class PatternConstraint