edu.cmu.aura.service.query.expression
Class LeafOperator

java.lang.Object
  |
  +--edu.cmu.aura.service.query.expression.Operator
        |
        +--edu.cmu.aura.service.query.expression.LeafOperator

Direct Known Subclasses:

OpEqual, OpGT, OpGTEQ, OpLT, OpLTEQ, OpNotEqual

public abstract class LeafOperator

extends Operator

FIXME - get rid of Literal class.

Fields inherited from class edu.cmu.aura.service.query.expression.Operator

FALSE, TRUE, UNKNOWN

Constructor Summary

LeafOperator()

Method Summary

boolean	eval(Attribute attrib, Literal literal)
int	eval(Attribute attrib, Literal literal, java.util.ArrayList ncAttribs)
abstract boolean	eval(java.lang.Object val1, java.lang.Object val2)
boolean	isUnary()

Methods inherited from class edu.cmu.aura.service.query.expression.Operator

eval, eval, eval, eval, eval, eval, eval

Methods inherited from class java.lang.Object

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

Constructor Detail

LeafOperator

public LeafOperator()

Method Detail

eval

public int eval(Attribute attrib,
                Literal literal,
                java.util.ArrayList ncAttribs)
         throws EvaluationException

eval

public boolean eval(Attribute attrib,
                    Literal literal)
             throws EvaluationException

eval

public abstract boolean eval(java.lang.Object val1,
                             java.lang.Object val2)
                      throws EvaluationException

Overrides:

eval in class Operator

isUnary

public boolean isUnary()

Overrides:

isUnary in class Operator