Package org.apache.struts2.views.jasperreports7

Class ValueStackDataSource

java.lang.Object

org.apache.struts2.views.jasperreports7.ValueStackDataSource

All Implemented Interfaces:

net.sf.jasperreports.engine.JRDataSource, net.sf.jasperreports.engine.JRRewindableDataSource

public class ValueStackDataSource
extends Object
implements net.sf.jasperreports.engine.JRRewindableDataSource

Ported to Struts.

Constructor Summary

Constructors

Constructor	Description
ValueStackDataSource(ValueStack valueStack, String dataSourceParam, boolean wrapField)	Create a value stack data source on the given iterable property

Method Summary

Modifier and Type	Method	Description
Object	getFieldValue(net.sf.jasperreports.engine.JRField field)	Get the value of a given field
void	moveFirst()	Move to the first item.
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 Details

ValueStackDataSource

public ValueStackDataSource(ValueStack valueStack,
 String dataSourceParam,
 boolean wrapField)

Create a value stack data source on the given iterable property

Parameters:

valueStack - The value stack to base the data source on

dataSourceParam - The property to iterate over for the report

Method Details

getFieldValue

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

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 ValueStackDataSource object if the field value evaluates to an object that can be iterated over.

moveFirst

public void moveFirst()

Move to the first item.

Specified by:

moveFirst in interface net.sf.jasperreports.engine.JRRewindableDataSource

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