org.araneaframework.backend.list.memorybased.expression
Class LazyExpression

java.lang.Object
  org.araneaframework.backend.list.memorybased.expression.LazyExpression

All Implemented Interfaces:

Expression, Serializable

public class LazyExpression

extends Object

implements Expression

Expression that is initialized lazily.

Since:

1.1

Author:

Rein Raudjärv

See Also:

Serialized Form

Constructor Summary

LazyExpression(ExpressionFactory factory)

Method Summary

Object	evaluate(VariableResolver resolver) Evaluates this Expression by returning its value.
Expression	getExpression()
ExpressionFactory	getFactory()

Methods inherited from class java.lang.Object

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

Constructor Detail

LazyExpression

public LazyExpression(ExpressionFactory factory)

Method Detail

getFactory

public ExpressionFactory getFactory()

getExpression

public Expression getExpression()

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.