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https://issues.apache.org/jira/browse/TAP5-2099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Barry Books updated TAP5-2099:
------------------------------
    Attachment: 0001-TAP-2099-Add-set-method-that-does-nothing-so-Literal.patch

Override the AbstractBinding set method so Literal/Symbol bindings will not 
throw a read only exception when a parameter field is updated. This among other 
things allows a mixin to use BindParameter to override the default value of a 
component parameter.

> Update parameters bound to literal: or symbol: from a mixin
> -----------------------------------------------------------
>
>                 Key: TAP5-2099
>                 URL: https://issues.apache.org/jira/browse/TAP5-2099
>             Project: Tapestry 5
>          Issue Type: Improvement
>    Affects Versions: 5.3.6, 5.4
>            Reporter: Lance
>              Labels: patch
>         Attachments: 
> 0001-TAP-2099-Add-set-method-that-does-nothing-so-Literal.patch, 
> TAP52099-1.patch
>
>
> Currently, I cannot update a component component parameter that is 
> initialized with a literal: or symbol: binding from a mixin. If I try to 
> @BindParameter the param and change it's value, I get a "Binding %s is 
> read-only" exception (originating from AbstractBinding).
> I propose that literal and symbol bindings are sourced from a PerThreadValue 
> that can be updated by a mixin.
> My original need for this was to create a "SinglePage" mixin for the Grid 
> component which would set the rowsPerPage parameter to Integer.MAX_VALUE. I 
> can't currently do this because by default, the parameter is a symbol: 
> binding.



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