ValueStackDataSource implementation leads to class cast exceptions
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Key: WW-2333
URL: https://issues.apache.org/struts/browse/WW-2333
Project: Struts 2
Issue Type: Bug
Components: Plugin - JasperReports
Affects Versions: 2.0.11
Reporter: Thorsten Schäfer
Assume you have a class Foo that has a Collection of Bar's. Without using
Struts, the expected behavior of a report that takes Foo's as input is, that a
reference $F{bar} returns a java.util.Collection (of Bar's). However, this will
not be the case when using the ValueStackDataSource implementation; an instance
of ValueStackDataSource is returned instead of a collection. If the method
"getFieldValue" gets called, it checks if the field value is iteratable (which
is true for collections) and then returns a new ValueStackDataSource instead of
the field value itself. I assume that this behavior breaks many reports.
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