prajna.servlet

Class MapFeatureServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

prajna.servlet.MapFeatureServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class MapFeatureServlet
extends javax.servlet.http.HttpServlet

This servlet creates KML files from a set of ESRI shape files hosted on a web server. It can be used to overlay various ESRI shapes over a GoogleMaps map, Google Earth or other geographic displays which can display KML. The display parameters, such as color used for the shapes, are specified by the web.xml file which initializes this servlet.

Author:

Edward Swing

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MapFeatureServlet()

Method Summary

Methods

Modifier and Type	Method and Description
void	doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res) Create a KML file from a map layer.
void	init() Initialize the servlet state.

Methods inherited from class javax.servlet.http.HttpServlet

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

Methods inherited from class javax.servlet.GenericServlet

destroy, 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

Constructor Detail

MapFeatureServlet

public MapFeatureServlet()

Method Detail

doGet

public void doGet(javax.servlet.http.HttpServletRequest req,
         javax.servlet.http.HttpServletResponse res)
           throws javax.servlet.ServletException,
                  java.io.IOException

Create a KML file from a map layer. The locations parameter specifies which items within the geographic layer should be used. The shape names should match those in the DBF files. Multiple shape names are separated by |, the pipe character.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Parameters:

req - the request the client has made of the servlet

res - the response the servlet sends to the client

Throws:

javax.servlet.ServletException - if the request could not be handled

java.io.IOException - if an input or output error is detected when the servlet handles the request

init

public void init()

Initialize the servlet state. This method looks for initialization parameters for baseMapUrl and mapLayers, which determine the locations of the ESRI map files. The parameter color specifies the color that the map file is drawn with, while writerClass determines the FormatWriter used to write the data to the output stream.

Overrides:

init in class javax.servlet.GenericServlet