DynamicBlock

[Ashish Raniwala <ar...@gmail.com>]

Guys,
I am getting NullPointer in using Table and Tree component while loading 
these components with DynamicBlock.
Components work fine when I don't use DynamicBlock and just add those 
components in page template.

For both of these components (Table/Tree) I notice that the default value of 
some parameter is not being set which later gives NullPointer. Obviously 
NULL check is not there in code as component expect property to be not null 
as default value is supplied in template.

For table component spec is:
<parameter name="tableSessionStoreManager"
        type="org.apache.tapestry.contrib.table.model.ITableSessionStoreManager"
        required="no"
        direction="auto"
        default-value="null">
        <description>
            The manager defining where the session data will be stored.
        </description>
    </parameter>

And for tree component spec is:
 <parameter name="nodeOffsetPixel" type="java.lang.Integer" 
direction="custom" required="no" default-value="15"/>

I get NullPointers as when DynamicBlock component adds these components to 
page these properties are not set as default value.

What could be the reason and how to resolve it.

Thanks,
Ashish 


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Re: DynamicBlock

[Michael Henderson <mh...@mac.com>]

Hi,

Others have indicated that Table components do not work inside 
DynamicBlock. the code is programmatically creating a Block containing 
your table and adding it to the component list of the DynamicBlock when 
the componentName is resolved.

There may be a problem with the parameter initialization during this 
process.

Perhaps it might work if you create a separate component which contains 
your table or tree which do not require parameters and use DynamicBlock 
to insert this component


Mike

PS It might help to post the HTML and the spec where you use 
DynamicBlock


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