dap4.dap4servlet

Class Dap4Servlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

dap4.dap4servlet.Dap4Servlet

All Implemented Interfaces:

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

public class Dap4Servlet
extends javax.servlet.http.HttpServlet

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Dap4Servlet()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addCommonHeaders(DapRequest drq)
protected CEConstraint	buildconstraint(DapRequest drq, String sce, DapDataset dmr) If the request has a constraint, then parse it else use the universal constraint
protected void	doCapabilities(DapRequest drq) Process a capabilities request.
protected void	doData(DapRequest drq, String datasetname) Process a DataDMR request.
protected void	doDMR(DapRequest drq, String datasetname) Process a DMR request.
protected void	doDSR(DapRequest drq, String datasetname) Process a DSR request.
protected void	doFavicon(DapRequest drq) Process a favicon request.
void	doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
void	init()

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

Dap4Servlet

public Dap4Servlet()

Method Detail

init

public void init()
          throws javax.servlet.ServletException

Overrides:

init in class javax.servlet.GenericServlet

Throws:

javax.servlet.ServletException

doGet

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

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException

doCapabilities

protected void doCapabilities(DapRequest drq)
                       throws IOException

Process a capabilities request. Currently, generate the front page.

Parameters:

drq - The merged dap state

Throws:

IOException

doFavicon

protected void doFavicon(DapRequest drq)
                  throws IOException

Process a favicon request.

Parameters:

drq - The merged dap state

Throws:

IOException

doDSR

protected void doDSR(DapRequest drq,
         String datasetname)
              throws IOException

Process a DSR request.

Parameters:

drq - The merged dap state

datasetname - The name of the dataset whose DSR is to be returned.

Throws:

IOException

doDMR

protected void doDMR(DapRequest drq,
         String datasetname)
              throws IOException

Process a DMR request.

Parameters:

drq - The merged dap state

datasetname - The name of the dataset whose DMR is to be returned.

Throws:

IOException

doData

protected void doData(DapRequest drq,
          String datasetname)
               throws IOException

Process a DataDMR request. Note that if this throws an exception, then it has not yet started to output a response. It a response had been initiated, then the exception would produce an error chunk.

Parameters:

drq - The merged dap state

datasetname - The name of the dataset whose DMR is to be returned.

Throws:

IOException

addCommonHeaders

protected void addCommonHeaders(DapRequest drq)
                         throws IOException

Throws:

IOException

buildconstraint

protected CEConstraint buildconstraint(DapRequest drq,
                           String sce,
                           DapDataset dmr)
                                throws IOException

If the request has a constraint, then parse it else use the universal constraint

Parameters:

drq -

sce - string of the constraint

Returns:

parsed constraint

Throws:

IOException