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

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

Direct Known Subclasses:

PatternConstraint, TermConstraint

public abstract class AbstractPatternConstraint
extends CaptureConstraint

] Parent class that contains common functionality for a constraint that is expressible using a token-based pattern.

Author:

schmmd

Field Summary

protected edu.washington.cs.knowitall.commonlib.regex.RegularExpression<Token>

expression

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

part

Constructor Summary

	AbstractPatternConstraint(org.jdom.Element e)
protected	AbstractPatternConstraint(org.jdom.Element e, ExtractionPart part)
	AbstractPatternConstraint(ExtractionPart part, String pattern)

Method Summary

protected Boolean	check(TokenSequence extraction) Evaluates this constraint against a token sequence using the underlying token-based regular expression.
protected String	deserializePattern(org.jdom.Element e) Constructs a pattern expression from an element.
boolean	equals(Object other) Force subclasses to avoid pointer-based comparison.
protected String	getString(TokenSequence extraction)
protected String	value(TokenSequence extraction) Evaluates this constraint against a token sequence using the underlying token-based regular expression.

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, generalize, getConstraintClass, hashCode, simplify, size, subsumes, toString, toString, toString, toXmlElement

Methods inherited from class java.lang.Object

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

Field Detail

expression

protected final edu.washington.cs.knowitall.commonlib.regex.RegularExpression<Token> expression

Constructor Detail

AbstractPatternConstraint

public AbstractPatternConstraint(org.jdom.Element e)

AbstractPatternConstraint

public AbstractPatternConstraint(ExtractionPart part,
                                 String pattern)

AbstractPatternConstraint

protected AbstractPatternConstraint(org.jdom.Element e,
                                    ExtractionPart part)

Method Detail

equals

public boolean equals(Object other)

Description copied from class: Constraint

Force subclasses to avoid pointer-based comparison.

Overrides:

equals in class Constraint

deserializePattern

protected String deserializePattern(org.jdom.Element e)

Constructs a pattern expression from an element.

Parameters:

e -

Returns:

check

protected Boolean check(TokenSequence extraction)

Evaluates this constraint against a token sequence using the underlying token-based regular expression.

Specified by:

check in class Constraint

Returns:

true if the pattern matches

value

protected String value(TokenSequence extraction)

Evaluates this constraint against a token sequence using the underlying token-based regular expression.

Specified by:

value in class CaptureConstraint

Returns:

the matching string, or null

getString

protected String getString(TokenSequence extraction)

Parameters:

extraction -

Returns:

the string to match the pattern against