net.sf.jasperreports.data.cache
Class ColumnValuesDataSource

java.lang.Object
  net.sf.jasperreports.data.cache.ColumnValuesDataSource

All Implemented Interfaces:

IndexedDataSource, JRDataSource, JRRewindableDataSource

public class ColumnValuesDataSource
extends java.lang.Object
implements JRRewindableDataSource, IndexedDataSource

Version:

$Id: ColumnValuesDataSource.java 5206 2012-04-02 07:54:19Z lucianc $

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Constructor Summary

ColumnValuesDataSource(java.lang.String[] fieldNames, int size, ColumnValues[] values)

Method Summary

java.lang.Object	getFieldValue(JRField field) Gets the field value for the current position.
int	getRecordIndex() Returns the index of the current record in the data source.
void	moveFirst() Moves back to the first element in the data source.
boolean	next() Tries to position the cursor on the next element in the data source.

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnValuesDataSource

public ColumnValuesDataSource(java.lang.String[] fieldNames,
                              int size,
                              ColumnValues[] values)

Method Detail

next

public boolean next()
             throws JRException

Description copied from interface: JRDataSource

Tries to position the cursor on the next element in the data source.

Specified by:

next in interface JRDataSource

Returns:

true if there is a next record, false otherwise

Throws:

JRException - if any error occurs while trying to move to the next element

getFieldValue

public java.lang.Object getFieldValue(JRField field)
                               throws DataSnapshotException

Description copied from interface: JRDataSource

Gets the field value for the current position.

Specified by:

getFieldValue in interface JRDataSource

Returns:

an object containing the field value. The object type must be the field object type.

Throws:

DataSnapshotException

moveFirst

public void moveFirst()

Description copied from interface: JRRewindableDataSource

Moves back to the first element in the data source.

Specified by:

moveFirst in interface JRRewindableDataSource

getRecordIndex

public int getRecordIndex()

Description copied from interface: IndexedDataSource

Returns the index of the current record in the data source. Note that this would not necessarily be the same as the index of the record in the order in which the data appears in the report, as after sorting or filtering a data source the original index of the record will be returned.

Specified by:

getRecordIndex in interface IndexedDataSource

Returns:

the index of the current record