[TAPESTRY-1429] Add getLink() to ICallback

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 4.0.2, 4.1.2, 4.2
• Fix Version/s: 4.2
• Component/s: Core Components
• Assignee: Unassigned
• Reporter: Geoff Callender
• Created: 25/Apr/07 13:21
• Updated: 24/Sep/07 10:42

Description

I'd like to see a getLink() method added to ICallback so we can do redirect-after-post with the callback.

public ILink getLink(IRequestCycle cycle);

The reason is that I like to keep a "callback stack" as I descend into the pages. A page can pop its calling page off the stack and often I'd like to redirect to it rather than just activate it.

Suggested implementation:

ExternalCallback.java
~~~~~~~~~~~~~~~~~

public ILink getLink(IRequestCycle cycle)
{
Defense.notNull(cycle, "cycle");

try

{ IEngineService service = cycle.getInfrastructure().getServiceMap().getService(Tapestry.EXTERNAL_SERVICE); ILink link = service.getLink(false, new ExternalServiceParameter(_pageName, _parameters)); return link; }

catch (ClassCastException ex)

{ throw new ApplicationRuntimeException(CallbackMessages.pageNotExternal(_pageName), ex); }
}


DirectCallback.java
~~~~~~~~~~~~~~~

public ILink getLink(IRequestCycle cycle)
{
Defense.notNull(cycle, "cycle");

IPage page = cycle.getPage(_pageName);
IComponent component = page.getNestedComponent(_componentIdPath);
IDirect direct = null;

try
{ direct = (IDirect) component; IEngineService service = cycle.getInfrastructure().getServiceMap().getService(Tapestry.DIRECT_SERVICE); ILink link = service.getLink(false, new DirectServiceParameter(direct, _parameters)); return link; }
catch (ClassCastException ex)
{ throw new ApplicationRuntimeException(CallbackMessages.componentNotDirect(component), component, null, ex); }
}


PageCallback.java
~~~~~~~~~~~~~~~

public ILink getLink(IRequestCycle cycle)
{
Defense.notNull(cycle, "cycle");

try { IEngineService service = cycle.getInfrastructure().getServiceMap().getService(Tapestry.PAGE_SERVICE); ILink link = service.getLink(false, _pageName); return link; }
catch (ClassCastException ex) { throw new ApplicationRuntimeException(CallbackMessages.pageNotExternal(_pageName), ex); }

}