That's what the Loop's volatile parameter is for, that is, for turning
off that "record state into the form" behavior.
On 2/24/07, Jean-Philippe Bouchard
<[EMAIL PROTECTED]> wrote:
Hi Howard,
I don't need to squeeze it. I just happen to iterate a list ContextAsset
in a "For" component rendered in a form. Tapestry tries to squeeze it by
adding it to a form hidden component. When the component is not used in
a form, it works perfectly.
This is the HTML page for the component:
<span jwcid="@Any" title="ognl:model.rating">
<span jwcid="@For" source="ognl:model.stars" value="ognl:star"
><img border="0" jwcid="@Image" image="ognl:star"
alt="star"/></span>
</span>
mode.stars is an array of IAsset objects which are taken from the jwc.
This is the jwc:
<component-specification allow-body="no" allow-informal-parameters="no">
<asset name="star" path="images/pink-star.gif"/>
<asset name="stardimmed" path="images/pink-star-dim.gif"/>
<asset name="starhalf" path="images/pink-star-half.gif"/>
<property name="star"/>
</component-specification>
Howard Lewis Ship wrote:
> This is not a bug per-se, it could be an enhancement. There's nothing
> in the description of ContextAsset to indicate that it is supposed to
> be serializable and, generally, only serializable objects can be
> "squeezed" into a URL.
>
> It's possible to extend the DataSqueezer, via HiveMind contributions,
> to inform it about how to squeeze additonal types of objects, so you
> could get it to squeeze assets (with just a bit of work).
>
> I do wonder why you needed to squeeze it? At most, you should be
> squeezing the asset's id.
>
> On 2/22/07, Jean-Philippe Bouchard
> <[EMAIL PROTECTED]> wrote:
>> Hi,
>>
>> I have a component which iterates over an array of context assets
>> (images) using the "For" component. This component works fine, except
>> when put it in a form.
>>
>> In a form, it fails with "java.lang.IllegalArgumentException: Could not
>> find a strategy instance for class
>> org.apache.tapestry.asset.ContextAsset". The problem seems to be that
>> when The ForBean renders, its StoreSourceDataIterator.next() is trying
>> to insert a hidden value in the form. The method called is
>> ForBean.getStringRepFromValue() which fails on DataSqueezer.squeeze()
>> method with the exception previously mentioned. The reason for the
>> failure is that no squeeze strategy can be found for the ContextAsset
>> object.
>>
>> Here is the relevant part of the stackstrace:
>>
>> Caused by: java.lang.IllegalArgumentException: Could not find a strategy
>> instance for class org.apache.tapestry.asset.ContextAsset.
>> at
>>
org.apache.hivemind.lib.util.StrategyRegistryImpl.searchForAdaptor(StrategyRegistryImpl.java:176)
>>
>> at
>>
org.apache.hivemind.lib.util.StrategyRegistryImpl.getStrategy(StrategyRegistryImpl.java:74)
>>
>> at
>>
org.apache.tapestry.util.io.DataSqueezerImpl.squeeze(DataSqueezerImpl.java:125)
>>
>> at
>> $DataSqueezer_110eadc1cb3.squeeze($DataSqueezer_110eadc1cb3.java)
>> at
>>
org.apache.tapestry.components.ForBean.getStringRepFromValue(ForBean.java:397)
>>
>> at
>>
org.apache.tapestry.components.ForBean$StoreSourceDataIterator.next(ForBean.java:365)
>>
>> at
>> org.apache.tapestry.components.ForBean.renderComponent(ForBean.java:125)
>>
>> I'm not sure where the problem lies but I "fixed" it by unrolling my for
>> loop (there are only and always 5 elements in it).
>>
>> Ciao
>> JPB
>>
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>>
>>
>
>
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--
Howard M. Lewis Ship
TWD Consulting, Inc.
Independent J2EE / Open-Source Java Consultant
Creator and PMC Chair, Apache Tapestry
Creator, Apache HiveMind
Professional Tapestry training, mentoring, support
and project work. http://howardlewisship.com
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