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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