Package com.ibm.wala.fixpoint

Class AbstractOperator<T extends IVariable<T>>

java.lang.Object

com.ibm.wala.fixpoint.AbstractOperator<T>

All Implemented Interfaces:

FixedPointConstants

Direct Known Subclasses:

AbstractMeetOperator, NullaryOperator, TypeInference.PrimitivePropagateOperator, UnaryOperator

public abstract class AbstractOperator<T extends IVariable<T>>
extends Object
implements FixedPointConstants

operator for a step in an iterative solver

This is an abstract class and not an interface in order to force subclasses to re-implement equals(), hashCode(), and toString()

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

Constructor Summary

Constructors

Constructor	Description
AbstractOperator()

Method Summary

Modifier and Type	Method	Description
abstract boolean	equals(Object o)
abstract byte	evaluate(T lhs, T[] rhs)	Evaluate this equation, setting a new value for the left-hand side.
abstract int	hashCode()
abstract String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

AbstractOperator

public AbstractOperator()

Method Details

evaluate

public abstract byte evaluate(T lhs,
 T[] rhs)

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

Returns:

a code that indicates: 1) has the lhs value changed? 2) has this equation reached a fixed-point, in that we never have to evaluate the equation again, even if rhs operands change?

hashCode

public abstract int hashCode()

Overrides:

hashCode in class Object

equals

public abstract boolean equals(Object o)

Overrides:

equals in class Object

toString

public abstract String toString()

Overrides:

toString in class Object