Examples with Bean collection and reflection

[2002 JI Open Discussion]

By: Olivier - opoppon

Examples with Bean collection and reflection

2003-11-21 08:12

Hi,

 

I have just discovered jasper and iReport.

I've gone through different sites, forums...but it seems that there aren't much examples of using jasper with bean collection.

Basically I have trouble creating parameter/fields of anything else but the default type (ex: Employee), and then access the properties of this bean using reflection.

Something like $P{employee}.getName()

 

Has anyone come across such examples ?

 

Thanks,

 

Olivier

 

 

 

 

By: Gregory A. Swarthout - gswarthout

RE: Examples with Bean collection and reflect

2003-11-21 11:15

If you are using an object of a custom bean class, you will have to pass it in as a java.lang.Object and then cast it to its correct type when you use it. ie:

 

((Employee)$P{employee}).getName()

 

 

 

 

By: Olivier - opoppon

RE: Examples with Bean collection and reflection

2003-11-24 00:08

Thanks. worked fine.

 

 

 

 

 

By: Olivier - opoppon

RE: Examples with Bean collection and reflection

2003-11-24 02:25

I managed to display the value of the field for this object that I passed as a parameter.

 

Now, I would like to do the same, for a collection of Employee.

 

This is how I try to do things :

in the java file:

list = new Vector();

list.add( new Employee("Doe1", new Integer(1)));

list.add( new Employee("Doe2", new Integer(2)));

 

JasperManager.fillReport( jasperReport, parameters, new JRBeanCollectionDataSource( list));

 

in the xml file : (trying to guess how it should be here)

 

<field name="employee" class="java.lang.Object"/>

<variable name="name" class="java.lang.String" ....>

<variable expression>((Employee)$F{employee}).getNom()</></>

 

<group name="employeeList" ...>

<groupExpression>null</groupExpression>

</group>

....

<detail>

...

<textFieldExpression class="java.lang.String">$V{name}</textFieldExpression>

</detail>

 

I would like to know if my understanding is more or less correct.

 

Thanks,

 

Olivier

 

 

 

 

 

 

 

By: Gregory A. Swarthout - gswarthout

RE: Examples with Bean collection and reflect

2003-11-24 11:35

>I would like to know if my understanding is more or less correct.

 

Less, I'm afraid. In this case I'm going to admonish you to RTFM.