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From "Howard M. Lewis Ship (JIRA)" <...@tapestry.apache.org>
Subject [jira] Closed: (TAPESTRY-1776) Component classes may be loaded by different class loaders, causing type coercion issues when a component has a parameter whose type is a component class
Date Wed, 02 Jan 2008 19:55:34 GMT

     [ https://issues.apache.org/jira/browse/TAPESTRY-1776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Howard M. Lewis Ship closed TAPESTRY-1776.
------------------------------------------

    Resolution: Duplicate
      Assignee: Howard M. Lewis Ship

Duplicate of TAPESTRY-2005.

> Component classes may be loaded by different class loaders, causing type coercion issues
when a component has a parameter whose type is a component class
> ---------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: TAPESTRY-1776
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-1776
>             Project: Tapestry
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.0.5
>         Environment: Mac OS X, Eclipse 3.3, Jetty Launcher, Jetty 5
>            Reporter: Ognen Ivanovski
>            Assignee: Howard M. Lewis Ship
>         Attachments: log.txt
>
>
> I get the following exception:
> java.lang.IllegalArgumentException: Could not find a coercion from type com.telekurs.pass.online.permissiongui.components.CheckboxGroup
to type com.telekurs.pass.online.permissiongui.components.CheckboxGroup.  Available coercions:...
(full trace attached)
> Note that it says "cannot find a coercion from A to A". I did some debugging and indeed
the class CheckboxGroup was represented by two different objects. 
> Tapestry should not allow for a component class to be loaded differently than in the
modified version. 
> More details: 
>  - CheckBoxGroup is a component very similar to RadioGroup (80% code similar) it is used
to group render a set of checkboxes with the same name. 
> - BulkSelect is a js component that i used for "select all" and "select none" operations
in connection to the CheckBoxGroup. It has a  
>   @Parameter(required = true, defaultPrefix="component")
>   private CheckboxGroup checkboxes;
> They are used in the following way:
> 	<t:BulkSelect checkboxes="permissionSelections" select="true" />
> 	<t:CheckboxGroup t:id="permissionSelections"
> 	  value="selected" encoder="permissionValueEncoder" disabled="disabled">
>            <!-- ...-->
>         </t:CheckboxGroup>

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