com.jidesoft.chart.servlet
Class DefaultHttpChartFactory

java.lang.Object
  com.jidesoft.chart.servlet.DefaultHttpChartFactory

All Implemented Interfaces:

HttpComponentFactory<Chart>

public class DefaultHttpChartFactory
extends Object
implements HttpComponentFactory<Chart>

The base URL causes a chart servlet to be called and the chart servlet delegates control to this class to create a suitable chart object from the URL and its parameters. The base URL might be something like:

http://localhost:8080/Charts/chart?

After that, there follows a series of key-value pairs, where each key is expected to use a particular syntax for the information that it provides. A lot of information needs to be packed into a small number of characters, but it's not as bad as it sounds and it should be possible to start generating charts from the servlet within the space of a few minutes.

The parameters are as follows:

size

The width and height of the chart in pixels. For example, for a chart 600 pixels wide and 400 pixels high, use

size=600x400

axes

A list of semi-colon separated axes and their ranges

xyd

A list of XY points. The x and y points of a pair are separated by a comma and the pairs are separated by a semi-colon. The whole list is enclosed in brackets [].

Constructor Summary

DefaultHttpChartFactory()
Default Constructor

Method Summary

Chart

getInstance(HttpServletRequest request) The main factory method

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultHttpChartFactory

public DefaultHttpChartFactory()

Default Constructor

Method Detail

getInstance

public Chart getInstance(HttpServletRequest request)

The main factory method

Specified by:

getInstance in interface HttpComponentFactory<Chart>

Parameters:

request - the HTTP request

Returns:

an instance of a Component