Maybe this deserves its own quick specific section in the t4/t5 docs. I seem to remember wondering "wtf does 'volatile' mean anyway?" a couple times a long time ago. Maybe it'll help shed more light on the importance of using efficient squeezers/key converters/etc...
On 2/25/07, Howard Lewis Ship <[EMAIL PROTECTED]> wrote:
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 > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: [EMAIL PROTECTED] > >> For additional commands, e-mail: [EMAIL PROTECTED] > >> > >> > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- 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 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
-- Jesse Kuhnert Tapestry/Dojo team member/developer Open source based consulting work centered around dojo/tapestry/tacos/hivemind. http://blog.opencomponentry.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
