webwork.view.jasperreports
Class ValueStackDataSource

java.lang.Object
  webwork.view.jasperreports.ValueStackDataSource

All Implemented Interfaces:

dori.jasper.engine.JRDataSource

public class ValueStackDataSource

extends java.lang.Object

implements dori.jasper.engine.JRDataSource

Constructor Summary

ValueStackDataSource(ValueStack valueStack, java.lang.String dataSource)
Create a value stack data source on the given iterable property

Method Summary

java.lang.Object	getFieldValue(dori.jasper.engine.JRField field) Get the value of a given field
boolean	next() Is there any more data

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ValueStackDataSource

public ValueStackDataSource(ValueStack valueStack,
                            java.lang.String dataSource)

Create a value stack data source on the given iterable property

Parameters:

valueStack - The value stack to base the data source on

dataSource - The property to iterate over for the report

Method Detail

next

public boolean next()
             throws dori.jasper.engine.JRException

Is there any more data

Specified by:

next in interface dori.jasper.engine.JRDataSource

Returns:

true if there are more elements to iterate over and false otherwise

Throws:

dori.jasper.engine.JRException - if there is a problem determining whether there is more data

getFieldValue

public java.lang.Object getFieldValue(dori.jasper.engine.JRField field)
                               throws dori.jasper.engine.JRException

Get the value of a given field

Specified by:

getFieldValue in interface dori.jasper.engine.JRDataSource

Parameters:

field - The field to get the value for. The expression language to get the value of the field is either taken from the description property or from the name of the field if the description is null.

Returns:

an Object containing the field value or a new ValueStackDataSource object if the field value evaluates to an object that can be iterated over.

Throws:

dori.jasper.engine.JRException - if there is a problem obtaining the value