org.springframework.webflow.engine

Class DecisionState

java.lang.Object

org.springframework.webflow.core.AnnotatedObject

org.springframework.webflow.engine.State

org.springframework.webflow.engine.TransitionableState

org.springframework.webflow.engine.DecisionState

All Implemented Interfaces:

Annotated, StateDefinition, TransitionableStateDefinition

public class DecisionState
extends TransitionableState

A simple transitionable state that when entered will execute the first transition whose matching criteria evaluates to true in the context of the current request.

A decision state is a convenient, simple way to encapsulate reusable state transition logic in one place.

Author:

Keith Donald

Field Summary

Fields inherited from class org.springframework.webflow.core.AnnotatedObject

CAPTION_PROPERTY, DESCRIPTION_PROPERTY

Constructor Summary

Constructors

Constructor and Description
DecisionState(Flow flow, String stateId) Creates a new decision state.

Method Summary

Methods inherited from class org.springframework.webflow.engine.TransitionableState

exit, getExitActionList, getRequiredTransition, getTransition, getTransitions, getTransitionSet, handleEvent

Methods inherited from class org.springframework.webflow.engine.State

enter, equals, getEntryActionList, getExceptionHandlerSet, getFlow, getId, getOwner, handleException, hashCode, isStartState, isViewState, toString

Methods inherited from class org.springframework.webflow.core.AnnotatedObject

getAttributes, getCaption, getDescription, setCaption, setDescription

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.springframework.webflow.definition.StateDefinition

getId, getOwner, isViewState

Methods inherited from interface org.springframework.webflow.core.Annotated

getAttributes, getCaption, getDescription

Constructor Detail

DecisionState

public DecisionState(Flow flow,
             String stateId)
              throws IllegalArgumentException

Creates a new decision state.

Parameters:

flow - the owning flow

stateId - the state identifier (must be unique to the flow)

Throws:

IllegalArgumentException - when this state cannot be added to given flow, e.g. because the id is not unique