org.araneaframework.backend.list.memorybased.expression.compare
Class EqualsExpression

java.lang.Object
  org.araneaframework.backend.list.memorybased.expression.compare.EqualsExpression

All Implemented Interfaces:

CompositeExpression, Expression, Serializable

public class EqualsExpression

extends Object

implements CompositeExpression

See Also:

Serialized Form

Field Summary

protected Expression	expr1
protected Expression	expr2

Constructor Summary

EqualsExpression(Expression expr1, Expression expr2)

Method Summary

Object	evaluate(VariableResolver resolver) Evaluates this Expression by returning its value.
Expression[]	getChildren()

Methods inherited from class java.lang.Object

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

Field Detail

expr1

protected Expression expr1

expr2

protected Expression expr2

Constructor Detail

EqualsExpression

public EqualsExpression(Expression expr1,
                        Expression expr2)

Method Detail

evaluate

public Object evaluate(VariableResolver resolver)
                throws ExpressionEvaluationException

Description copied from interface: Expression

Evaluates this Expression by returning its value. The returned value may also be null.

Specified by:

evaluate in interface Expression

Parameters:

resolver - Resolver that is used to evalute Variables.

Returns:

the value of this Expression.

Throws:

ExpressionEvaluationException - when the evaluating fails.

getChildren

public Expression[] getChildren()

Specified by:

getChildren in interface CompositeExpression