uk.ac.ed.epcc.webapp.forms.result

Class ViewTransitionResult<T,K>

java.lang.Object

uk.ac.ed.epcc.webapp.forms.result.ChainedTransitionResult<T,K>

uk.ac.ed.epcc.webapp.forms.result.ViewTransitionResult<T,K>

Type Parameters:

T -

K -

All Implemented Interfaces:

FormResult

Direct Known Subclasses:

AbstractViewTransitionFactory.ViewResult, MailViewResult, ViewTableResult, ViewXMLTargetResult

public class ViewTransitionResult<T,K>
extends ChainedTransitionResult<T,K>

A Form result generating a View Transition. This is essentially a ChainedTransitionResult with a null key but with the destination a "bookmarkable" location so in HTML it uses a redirect not a forward. The TransitionServlet will convert this to a plain ChainedTransitionResult before processing. In non web contexts the two representations are identical.

Constructor Summary

Constructors

Constructor and Description
ViewTransitionResult(AppContext conn, java.lang.Class<? extends ViewTransitionFactory> template, java.lang.String tag, T target) Alternate constructor that performs a lookup of the ViewTransitionFactory This is preferable if an instance is not already available as it can utilise any cached copy.
ViewTransitionResult(ViewTransitionFactory<K,T> provider, T target)

Method Summary

Modifier and Type	Method and Description
boolean	useURL() Is this a transition to a bookmarkable location.

Methods inherited from class uk.ac.ed.epcc.webapp.forms.result.ChainedTransitionResult

accept, equals, getProvider, getTarget, getTransition, hashCode

Methods inherited from class java.lang.Object

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

Constructor Detail

ViewTransitionResult

public ViewTransitionResult(ViewTransitionFactory<K,T> provider,
                            T target)

ViewTransitionResult

public ViewTransitionResult(AppContext conn,
                            java.lang.Class<? extends ViewTransitionFactory> template,
                            java.lang.String tag,
                            T target)

Alternate constructor that performs a lookup of the ViewTransitionFactory This is preferable if an instance is not already available as it can utilise any cached copy.

Parameters:

conn -

template -

tag -

target -

Method Detail

useURL

public boolean useURL()

Description copied from class: ChainedTransitionResult

Is this a transition to a bookmarkable location. In web implementations if this method returns true then we redirect to the URL instead of just forwarding to logic. This means the page is at a URL that can be bookmarked. It is also useful for results from state changing operations as this prevents the back button from re-submitting the operation.

Overrides:

useURL in class ChainedTransitionResult<T,K>

Returns:

true if URL needed