org.opennms.netmgt.charts
Class ChartUtils

java.lang.Object
  org.opennms.netmgt.charts.ChartUtils

public class ChartUtils
extends Object

ChartUtils class.

Version:

$Id: $

Author:

David Hustace

Constructor Summary

ChartUtils()

Method Summary

static org.jfree.chart.JFreeChart	getBarChart(String chartName) This method will returns a JFreeChart bar chart constructed based on XML configuration.
static void	getBarChart(String chartName, OutputStream out) Helper method that returns the JFreeChart to an output stream written in JPEG format.
static byte[]	getBarChartAsPNGByteArray(String chartName) Helper method that returns the JFreeChart as a PNG byte array.
static BarChart	getBarChartConfigByName(String chartName) Helper method used to retrieve the XML defined BarChart (castor class)
static void	getBarChartPNG(String chartName, OutputStream out) Helper method that returns the JFreeChart to an output stream written in JPEG format.
static BufferedImage	getChartAsBufferedImage(String chartName) Helper method used to return a JFreeChart as a buffered Image.
static Iterator<BarChart>	getChartCollectionIterator() Helper method used to fetch an Iterator for all defined Charts

Methods inherited from class java.lang.Object

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

Constructor Detail

ChartUtils

public ChartUtils()

Method Detail

getBarChart

public static org.jfree.chart.JFreeChart getBarChart(String chartName)
                                              throws org.exolab.castor.xml.MarshalException,
                                                     org.exolab.castor.xml.ValidationException,
                                                     IOException,
                                                     SQLException

This method will returns a JFreeChart bar chart constructed based on XML configuration.

Parameters:

chartName - Name specified in chart-configuration.xml

Returns:

JFreeChart constructed from the chartName

Throws:

org.exolab.castor.xml.MarshalException - if any.

org.exolab.castor.xml.ValidationException - if any.

IOException - if any.

SQLException - if any.

getBarChart

public static void getBarChart(String chartName,
                               OutputStream out)
                        throws org.exolab.castor.xml.MarshalException,
                               org.exolab.castor.xml.ValidationException,
                               IOException,
                               SQLException

Helper method that returns the JFreeChart to an output stream written in JPEG format.

Parameters:

chartName - a String object.

out - a OutputStream object.

Throws:

org.exolab.castor.xml.MarshalException - if any.

org.exolab.castor.xml.ValidationException - if any.

IOException - if any.

SQLException - if any.

getBarChartPNG

public static void getBarChartPNG(String chartName,
                                  OutputStream out)
                           throws org.exolab.castor.xml.MarshalException,
                                  org.exolab.castor.xml.ValidationException,
                                  IOException,
                                  SQLException

Helper method that returns the JFreeChart to an output stream written in JPEG format.

Parameters:

chartName - a String object.

out - a OutputStream object.

Throws:

org.exolab.castor.xml.MarshalException - if any.

org.exolab.castor.xml.ValidationException - if any.

IOException - if any.

SQLException - if any.

getBarChartAsPNGByteArray

public static byte[] getBarChartAsPNGByteArray(String chartName)
                                        throws org.exolab.castor.xml.MarshalException,
                                               org.exolab.castor.xml.ValidationException,
                                               IOException,
                                               SQLException

Helper method that returns the JFreeChart as a PNG byte array.

Parameters:

chartName - a String object.

Returns:

a byte array

Throws:

org.exolab.castor.xml.MarshalException - if any.

org.exolab.castor.xml.ValidationException - if any.

IOException - if any.

SQLException - if any.

getChartAsBufferedImage

public static BufferedImage getChartAsBufferedImage(String chartName)
                                             throws org.exolab.castor.xml.MarshalException,
                                                    org.exolab.castor.xml.ValidationException,
                                                    IOException,
                                                    SQLException

Helper method used to return a JFreeChart as a buffered Image.

Parameters:

chartName - a String object.

Returns:

a BufferedImage

Throws:

org.exolab.castor.xml.MarshalException - if any.

org.exolab.castor.xml.ValidationException - if any.

IOException - if any.

SQLException - if any.

getBarChartConfigByName

public static BarChart getBarChartConfigByName(String chartName)
                                        throws org.exolab.castor.xml.MarshalException,
                                               org.exolab.castor.xml.ValidationException,
                                               IOException

Helper method used to retrieve the XML defined BarChart (castor class)

Parameters:

chartName - a String object.

Returns:

a derived Castor class: BarChart

Throws:

org.exolab.castor.xml.MarshalException - if any.

org.exolab.castor.xml.ValidationException - if any.

IOException - if any.

getChartCollectionIterator

public static Iterator<BarChart> getChartCollectionIterator()
                                                     throws IOException,
                                                            org.exolab.castor.xml.MarshalException,
                                                            org.exolab.castor.xml.ValidationException

Helper method used to fetch an Iterator for all defined Charts

Returns:

BarChart Iterator

Throws:

IOException - if any.

org.exolab.castor.xml.MarshalException - if any.

org.exolab.castor.xml.ValidationException - if any.