com.opensymphony.webwork.views.jasperreports
Class OgnlValueStackDataSource

java.lang.Object
  com.opensymphony.webwork.views.jasperreports.OgnlValueStackDataSource

All Implemented Interfaces:

net.sf.jasperreports.engine.JRDataSource

public class OgnlValueStackDataSource
extends Object
implements net.sf.jasperreports.engine.JRDataSource

Ported to WebWork2.

Version:

$Id$

Author:

<a href="hermanns@aixcept.de">Rainer Hermanns</a>

Constructor Summary

OgnlValueStackDataSource(com.opensymphony.xwork.util.OgnlValueStack valueStack, String dataSource)
Create a value stack data source on the given iterable property

Method Summary

Object	getFieldValue(net.sf.jasperreports.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

OgnlValueStackDataSource

public OgnlValueStackDataSource(com.opensymphony.xwork.util.OgnlValueStack valueStack,
                                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

getFieldValue

public Object getFieldValue(net.sf.jasperreports.engine.JRField field)
                     throws net.sf.jasperreports.engine.JRException

Get the value of a given field

Specified by:

getFieldValue in interface net.sf.jasperreports.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 OgnlValueStackDataSource object if the field value evaluates to an object that can be iterated over.

Throws:

net.sf.jasperreports.engine.JRException - if there is a problem obtaining the value

next

public boolean next()
             throws net.sf.jasperreports.engine.JRException

Is there any more data

Specified by:

next in interface net.sf.jasperreports.engine.JRDataSource

Returns:

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

Throws:

net.sf.jasperreports.engine.JRException - if there is a problem determining whether there is more data