org.nfis.gdas.v091
Class GdasServlet091

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.nfis.util.NfisServlet
              org.nfis.gdas.v091.GdasServlet091

All Implemented Interfaces:

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

public class GdasServlet091
extends org.nfis.util.NfisServlet

This class is responsible for listening for GDAS 0.9.1 requests and replying with the appropriate return XML documents. The main task is to extract the correct parameters out of the request and get them in a format to send to DataHandler.getData(String, String, String, String, String, String, String, String, OutputStream)

Implementation follows the Open GIS Consortium Inc. Geolinked Data Access Service (GDAS) 0.9.1 specification. Specification is available at:

GDAS Specifications Document Version 0.9.1.

Version:

1.0 - Sep 15, 2004 - 2:08:34 PM

Author:

emurphy emurphy@pfc.cfs.nrcan.gc.ca

See Also:

Serialized Form

Field Summary

static java.lang.String	TYPE_OF_XML_REQUEST The name of the request attribute that contains the string 'GetCapabilities' or 'GetData'.
static java.lang.String	XML_REQUEST_DOC The name of a GetData XML request stored in the request.

Fields inherited from class org.nfis.util.NfisServlet

DEFAULT_MAX_IN_MEMORY, DEFAULT_MAX_SIZE, FILE_TO_LARGE_ERROR, FILE_UPOAD_ERROR, MAX_IN_MEMORY, MAX_SIZE, NULL_PARAM_ERROR, TEMP_DIRECTORY, UNKNOWN_SIZE_ERROR

Constructor Summary

GdasServlet091()

Method Summary

protected void	doGet(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) OGC specification requires the GDAS server to respond to an HTTP 'GET' call for its various services.
protected void	doPost(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Field requests as defined in the GDAS 0.9.1 specification.
void	init() Retrieve the GetCapabilities document and stuff it into a byte array for quick return to clients.

Methods inherited from class org.nfis.util.NfisServlet

forwardTo, getCommand, getFileItem, getFileItems, getLanguageFromSession, getParameter, setPropertyFile, writeOutXml

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, log, log

Methods inherited from class java.lang.Object

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

Field Detail

XML_REQUEST_DOC

public static final java.lang.String XML_REQUEST_DOC

The name of a GetData XML request stored in the request.

See Also:

Constant Field Values

TYPE_OF_XML_REQUEST

public static final java.lang.String TYPE_OF_XML_REQUEST

The name of the request attribute that contains the string 'GetCapabilities' or 'GetData'.

See Also:

Constant Field Values

Constructor Detail

GdasServlet091

public GdasServlet091()

Method Detail

doGet

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

OGC specification requires the GDAS server to respond to an HTTP 'GET' call for its various services. Post implementation is optional.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

java.io.IOException

See Also:

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

init

public void init()
          throws javax.servlet.ServletException

Retrieve the GetCapabilities document and stuff it into a byte array for quick return to clients. Then instantiate the single instance of DataHandler used by all instances of this class.

Overrides:

init in class org.nfis.util.NfisServlet

Throws:

javax.servlet.ServletException

doPost

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

Field requests as defined in the GDAS 0.9.1 specification. This implementation returns only the 0.9.1 GetCapabilities.

Overrides:

doPost in class javax.servlet.http.HttpServlet

Throws:

java.io.IOException

See Also:

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