uk.ac.ed.epcc.webapp.forms.transition

Interface DefaultingTransitionFactory<K,T>

Type Parameters:

K -

T -

All Superinterfaces:

Contexed, TransitionFactory<K,T>

All Known Implementing Classes:

CodeAuthTransitionProvider

public interface DefaultingTransitionFactory<K,T>
extends TransitionFactory<K,T>

TransitionProvider that can generate a default transition for a target if no other transition is specified. Like ViewTransitionFactory this defines the operation if no transition is specified for a target. If both interfaces are implemented the default transition is taken if one is returned but a view transition is considered if getDefaultTransition(Object) returns null.

An default transition should usually not modify state. Consider having the key implement ViewTransitionKey if this is not the case.

See Also:

IndexTransitionFactory

Method Summary

Modifier and Type	Method and Description
K	getDefaultTransition(T target) Get the key for the default transition.

Methods inherited from interface uk.ac.ed.epcc.webapp.forms.transition.TransitionFactory

accept, allowTransition, getSummaryContent, getTargetName, getTransition, getTransitions, lookupTransition

Methods inherited from interface uk.ac.ed.epcc.webapp.Contexed

getContext

Method Detail

getDefaultTransition

K getDefaultTransition(T target)

Get the key for the default transition. This method can return null if a sub-class wants to suppress the default transition, if there is no valid default for the target or if a view transition is to be used. Note that the target msut be non-null. To implement a default transition with no target use IndexTransitionFactory

Parameters:

target -

Returns:

transition key