Package org.kuali.rice.krms.framework.engine.expression

Class ExpressionBasedProposition

java.lang.Object

org.kuali.rice.krms.framework.engine.expression.ExpressionBasedProposition

All Implemented Interfaces:

Proposition

public class ExpressionBasedProposition
extends Object
implements Proposition

An implementation of Proposition which uses a given Expression<Boolean>

Author:

Kuali Rice Team (rice.collab@kuali.org)

Constructor Summary

Constructors

Constructor	Description
ExpressionBasedProposition(Expression<Boolean> expression)	Create an ExpressionBasedProposition with the given value

Method Summary

Modifier and Type	Method	Description
PropositionResult	evaluate(ExecutionEnvironment environment)	Evaluates this proposition -- and in the case of Propositions containing children, those children as well -- and returns the boolean result;
List<Proposition>	getChildren()	Returns the List of child Propositions that belong to this object.
boolean	isCompound()	Indicates whether this Proposition can have children.

Methods inherited from class java.lang.Object

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

Constructor Details

ExpressionBasedProposition

public ExpressionBasedProposition(Expression<Boolean> expression)

Create an ExpressionBasedProposition with the given value

Parameters:

expression - Expression to set the expression to

Method Details

evaluate

public PropositionResult evaluate(ExecutionEnvironment environment)

Description copied from interface: Proposition

Evaluates this proposition -- and in the case of Propositions containing children, those children as well -- and returns the boolean result;

Specified by:

evaluate in interface Proposition

Parameters:

environment - the ExecutionEnvironment that this Proposition is running in

Returns:

the boolean result of evaluation

getChildren

public List<Proposition> getChildren()

Description copied from interface: Proposition

Returns the List of child Propositions that belong to this object. If there are no children (e.g. for simple Proposition types), this must return an empty List.

Specified by:

getChildren in interface Proposition

Returns:

a List containing any child Propositions that belong to this object. Must never return null.

isCompound

public boolean isCompound()

Description copied from interface: Proposition

Indicates whether this Proposition can have children.

Specified by:

isCompound in interface Proposition

Returns:

true if this Proposition can contain child Propositions.