com.jrefinery.chart.demo.servlet
Class ImageDemoPie
java.lang.Object
|
+--javax.servlet.GenericServlet
|
+--javax.servlet.http.HttpServlet
|
+--com.jrefinery.chart.demo.servlet.BaseImageServlet
|
+--com.jrefinery.chart.demo.servlet.ImageDemoPie
- All Implemented Interfaces:
- Constants, java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig
- public class ImageDemoPie
- extends BaseImageServlet
A generic image producer. The servlet takes an sql string from the request and generates an
image based upon this. The sql query should return results in the form
catagory_1, series_1_y_value
catagory_2, series_1_y_value
catagory_3, series_1_y_value
catagory_4, series_1_y_value
catagory_5, series_1_y_value
The supplied sql should not include the word select as this is added at the commencement.
- See Also:
- Serialized Form
Fields inherited from class com.jrefinery.chart.demo.servlet.BaseImageServlet |
chartTitle, dbSchema, debug, defaultChartType, df, IMAGE_CACHE_DELETE, IMAGE_CACHE_NO_DELETE, IMAGE_DYNAMIC_IMAGEMAP, IMAGE_DYNAMIC_NO_IMAGEMAP, IMAGE_TEMP_URL, servletName, sqlServerType, xAxisTitle, yAxisTitle |
Fields inherited from interface com.jrefinery.chart.demo.servlet.Constants |
CAUTION_FILE, CONTENT_TYPE, DB_CONNECTION, DB_DRIVER, DB_PASSWORD, DB_SCHEMA, DB_SERVER, DB_URL, DB_USER, DEBUG, FOOTER, FOOTER_FILE, FOOTER_URL, HEADER, HEADER_FILE, HEADER_URL, IMAGE_URL, MYSQL, ORACLE, ORGANISATION, REPLACE_SCHEMA, RESPONSE_HTML, RESPONSE_JPEG, RESPONSE_PDF, RESPONSE_PNG, RESPONSE_PS, RESPONSE_SVG, SHARED_DB, SHARED_DB_OPENER, SHARED_VOYAGES, SHARED_VOYAGES_TIME, TEMP_DIR, TEMP_URL |
Method Summary |
protected java.lang.String |
generateSQL(javax.servlet.http.HttpServletRequest request)
Generate the sql from the request passed to it. |
void |
init(javax.servlet.ServletConfig config)
Override init() to set up data used by invocations of this servlet. |
void |
modifyChart(JFreeChart chart,
javax.servlet.http.HttpServletRequest request)
Modify a chart based on request parameters
Override this method if you would like to modify the generated chart,
Generally for chart look and feel. |
Methods inherited from class com.jrefinery.chart.demo.servlet.BaseImageServlet |
createCategoryChart, createChart, createPieChart, createXYChart, destroy, doCache, doErrorPage, doGet, doHtml, doImage, doPost, existsURL, getColor, getImageOutputType, getImageSize, includeFile, includeUrl, openConnection, statusMessage, testConnection, writeChart |
Methods inherited from class javax.servlet.http.HttpServlet |
doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service |
Methods inherited from class javax.servlet.GenericServlet |
getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ImageDemoPie
public ImageDemoPie()
init
public void init(javax.servlet.ServletConfig config)
throws javax.servlet.ServletException
- Override init() to set up data used by invocations of this servlet.
- Overrides:
init
in class BaseImageServlet
- Parameters:
config
- Description of the Parameter- Throws:
javax.servlet.ServletException
- Description of the Exception
generateSQL
protected java.lang.String generateSQL(javax.servlet.http.HttpServletRequest request)
- Generate the sql from the request passed to it. Only one servlet request parameter is parsed
sql. Select is prepended as a simple security constraint to prevent update attempts.
- Overrides:
generateSQL
in class BaseImageServlet
- Parameters:
request
- The html servlet request- Returns:
- The generated sql
modifyChart
public void modifyChart(JFreeChart chart,
javax.servlet.http.HttpServletRequest request)
- Description copied from class:
BaseImageServlet
- Modify a chart based on request parameters
Override this method if you would like to modify the generated chart,
Generally for chart look and feel.
- Overrides:
modifyChart
in class BaseImageServlet
- Following copied from class:
com.jrefinery.chart.demo.servlet.BaseImageServlet
- Parameters:
chart
- The Chart