net.windward.datasource

Class ChartDataImpl

java.lang.Object

net.windward.datasource.ChartDataImpl

public class ChartDataImpl
extends java.lang.Object

Uses existing DataSource calls to handle chart data requests.

Version:

4.0 Jul 15, 2005

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.log4j.Logger	log

Constructor Summary

Constructors

Constructor and Description
ChartDataImpl(DataSourceNode node, ChartTag tag, DataSourceNode[] nodeStack, java.util.Locale locale) Returns a set of data used to create a chart.

Method Summary

Modifier and Type	Method and Description
static java.lang.Object	convertSelect(DataSourceNode node, java.lang.String datasource, java.lang.String select, DataSourceNode[] stack, java.lang.String dataType, java.util.Locale locale) Processes a select for a scalar result.
ChartDataSet	getData() Returns a set of data used to create a chart.

Methods inherited from class java.lang.Object

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

Field Detail

log

public static org.apache.log4j.Logger log

Constructor Detail

ChartDataImpl

public ChartDataImpl(DataSourceNode node,
                     ChartTag tag,
                     DataSourceNode[] nodeStack,
                     java.util.Locale locale)
              throws DataSourceException

Returns a set of data used to create a chart. The structure of this is tied tightly to the chart package.

Parameters:

node - The datasource node on.

tag - The wr:chart tag with the select setting to use.

nodeStack - The stack of forEach loops in at this point. Node [0] is the root document node so this will always have length of at least 1.

locale - The locale used for formatting numbers, dates, etc.

Throws:

DataSourceException

Method Detail

getData

public ChartDataSet getData()
                     throws DataSourceException

Returns a set of data used to create a chart. The structure of this is tied tightly to the chart package.

Returns:

The data used by the charting functions to create the chart.

Throws:

DataSourceException

convertSelect

public static java.lang.Object convertSelect(DataSourceNode node,
                                             java.lang.String datasource,
                                             java.lang.String select,
                                             DataSourceNode[] stack,
                                             java.lang.String dataType,
                                             java.util.Locale locale)
                                      throws DataSourceException

Processes a select for a scalar result.

Parameters:

node - The node we're on.

datasource - The datasource name.

select - The select.

stack - The node stack.

dataType - The data type.

Returns:

The scalar result of the select.

Throws:

DataSourceException