Question

I have to generate a report, that displays info about one object ( so the input is only one bean ).

The first problem is – this bean should contain lists of sub-beans( for example, comments, with comment type and comment date ). So I can pass them to a sub-report.

The second problem is – there is an array of 4 sub-beans, that contains few fields. I can create a separate field for each sub-bean’s property ( firstSubBeanName, secondSubBeanName… ) , but it’s ugly :(. Ideally, there should be a way to access these beans in a such way :

$F{test}[0].name

Please help.

Answer 1

If your list have a name (ie is a property of the object), you have just to pass as Data Source Expression for the subreport this property

$F{subBeansList}

The subreport should be ready to receive such kind of data. If you are using struts, it is possible you should use this class:

org.apache.struts2.views.jasperreports.ValueStackDataSource

as intermediary on your list field to be passed to the subreport.

The second question, the easy way is to use a list, so you can use this expression:

$F{test}.thelist.get(0)