org.openmrs.web.servlet

Class ShowGraphServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

org.openmrs.web.servlet.ShowGraphServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class ShowGraphServlet
extends javax.servlet.http.HttpServlet

This servlet returns an image graphing the numeric values for given concept(s).

This servlet is currently mapped to a /showGraphServlet url in web.xml

For an example of usage, see WEB-INF/view/portlets/patientGraphs.jsp

The only url parameters that are required are "patientId" and "conceptId".

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static long	serialVersionUID

Constructor Summary

Constructors

Constructor and Description
ShowGraphServlet()

Method Summary

Modifier and Type	Method and Description
protected void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
protected void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) There are no post actions.
protected org.jfree.chart.JFreeChart	getChart(javax.servlet.http.HttpServletRequest request) The main method for this class.
protected Date	getFromDate(String dateFromRequest) Get the FromDate object from the given string that is the time in milliseconds.
protected Date	getToDate(String dateFromRequest) Get the toDate object from the given string that is the time in milliseconds.

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

ShowGraphServlet

public ShowGraphServlet()

Method Detail

doGet

protected void doGet(javax.servlet.http.HttpServletRequest request,
                     javax.servlet.http.HttpServletResponse response)
              throws javax.servlet.ServletException,
                     IOException

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException

See Also:

HttpServlet.doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)

getChart

protected org.jfree.chart.JFreeChart getChart(javax.servlet.http.HttpServletRequest request)

The main method for this class. It will create a JFreeChart object to be written to the response.

Parameters:

request - the current request will all the parameters needed

Returns:

JFreeChart object to be rendered

Should:

set value axis label to given units, set value axis label to concept numeric units if given units is null

getFromDate

protected Date getFromDate(String dateFromRequest)

Get the FromDate object from the given string that is the time in milliseconds. If dateFromRequest is null, return 1 year ago from today.

Parameters:

dateFromRequest - String that was passed into this servlet

Returns:

Date parsed from dateFromRequest string

Should:

return one year previous to today if parameter is null, return same date as given string parameter

getToDate

protected Date getToDate(String dateFromRequest)

Get the toDate object from the given string that is the time in milliseconds. If dateFromRequest is null, return tomorrow's date.

Parameters:

dateFromRequest - String that was passed into this servlet

Returns:

Date parsed from dateFromRequest string

Should:

return next months date if parameter is null, return date one day after given string date, set hour minute and second to zero

doPost

protected void doPost(javax.servlet.http.HttpServletRequest request,
                      javax.servlet.http.HttpServletResponse response)
               throws javax.servlet.ServletException,
                      IOException

There are no post actions. Ignore this method.

Overrides:

doPost in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException