uk.co.strangeskies.expression

Class ConditionalExpression<O>

java.lang.Object

uk.co.strangeskies.expression.PassiveExpression<R>

uk.co.strangeskies.expression.TrinaryExpression<java.lang.Boolean,O,O,O>

uk.co.strangeskies.expression.ConditionalExpression<O>

Type Parameters:

O - The type of the expression.

All Implemented Interfaces:

Expression<O>

public class ConditionalExpression<O>
extends TrinaryExpression<java.lang.Boolean,O,O,O>

An Expression whose primary dependency is conditional on a Boolean Expression dependency. The primary dependency, in this instance, provides the value of this Expression directly.

Constructor Summary

Constructors

Constructor and Description
ConditionalExpression(Expression<? extends java.lang.Boolean> condition, Expression<? extends O> expressionWhenFulfilled, Expression<? extends O> expressionWhenUnfulfilled)

Method Summary

Modifier and Type	Method and Description
Expression<? extends java.lang.Boolean>	getCondition()
Expression<? extends O>	getExpressionWhenFulfilled()
Expression<? extends O>	getExpressionWhenUnfulfilled()

Methods inherited from class uk.co.strangeskies.expression.TrinaryExpression

evaluate, getFirstOperand, getOperation, getSecondOperand, getThirdOperand

Methods inherited from class uk.co.strangeskies.expression.PassiveExpression

getValue, invalidations

Methods inherited from class java.lang.Object

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

Methods inherited from interface uk.co.strangeskies.expression.Expression

anonymize, decoupleValue, immutable, over, over

Constructor Detail

ConditionalExpression

public ConditionalExpression(Expression<? extends java.lang.Boolean> condition,
                             Expression<? extends O> expressionWhenFulfilled,
                             Expression<? extends O> expressionWhenUnfulfilled)

Parameters:

condition - The condition to switch between primary dependencies.

expressionWhenFulfilled - The Expression to set as primary dependency when the given condition is fulfilled.

expressionWhenUnfulfilled - The Expression to set as primary dependency when the given condition is unfulfilled.

Method Detail

getCondition

public final Expression<? extends java.lang.Boolean> getCondition()

Returns:

The condition to switch between primary dependencies.

getExpressionWhenFulfilled

public final Expression<? extends O> getExpressionWhenFulfilled()

Returns:

The Expression which behaves as primary dependency when the given condition is fulfilled.

getExpressionWhenUnfulfilled

public final Expression<? extends O> getExpressionWhenUnfulfilled()

Returns:

The Expression which behaves as primary dependency when the given condition is unfulfilled.