com.ibm.wala.dataflow.graph
Class BooleanIdentity

java.lang.Object
  com.ibm.wala.fixpoint.AbstractOperator<T>
      com.ibm.wala.fixpoint.UnaryOperator<BooleanVariable>
          com.ibm.wala.dataflow.graph.BooleanIdentity

All Implemented Interfaces:

FixedPointConstants

public class BooleanIdentity
extends UnaryOperator<BooleanVariable>

Operator OUT = IN

Field Summary

Fields inherited from interface com.ibm.wala.fixpoint.FixedPointConstants

CHANGED, CHANGED_AND_FIXED, CHANGED_MASK, FIXED_MASK, NOT_CHANGED, NOT_CHANGED_AND_FIXED, SIDE_EFFECT_MASK

Method Summary

boolean	equals(java.lang.Object o)
byte	evaluate(BooleanVariable lhs, BooleanVariable rhs) Evaluate this equation, setting a new value for the left-hand side.
int	hashCode()
static BooleanIdentity	instance()
boolean	isIdentity()
java.lang.String	toString()

Methods inherited from class com.ibm.wala.fixpoint.UnaryOperator

evaluate, makeEquation

Methods inherited from class java.lang.Object

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

Method Detail

instance

public static BooleanIdentity instance()

evaluate

public byte evaluate(BooleanVariable lhs,
                     BooleanVariable rhs)
              throws java.lang.IllegalArgumentException

Description copied from class: UnaryOperator

Evaluate this equation, setting a new value for the left-hand side.

Specified by:

evaluate in class UnaryOperator<BooleanVariable>

Returns:

true if the lhs value changes. false otherwise.

Throws:

java.lang.IllegalArgumentException

toString

public java.lang.String toString()

Specified by:

toString in class AbstractOperator<BooleanVariable>

hashCode

public int hashCode()

Specified by:

hashCode in class AbstractOperator<BooleanVariable>

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in class AbstractOperator<BooleanVariable>

isIdentity

public boolean isIdentity()

Overrides:

isIdentity in class UnaryOperator<BooleanVariable>