com.yworks.yfiles.server.graphml.servlets
Class SaveGraphServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          com.yworks.yfiles.server.graphml.servlets.SaveGraphServlet

All Implemented Interfaces:

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

public abstract class SaveGraphServlet

extends javax.servlet.http.HttpServlet

Simple abstract base servlet that can read a GraphML file from the client and write it to a stream. Subclasses need to override createSaveStream(javax.servlet.http.HttpServletRequest) to return a stream to which the data can be sent.

See Also:

Serialized Form

Constructor Summary

protected	SaveGraphServlet() Calls the SaveGraphServlet(String) constructor using AbstractGraphRoundtripSupport.PARAM_GRAPH as the parameter name.
protected	SaveGraphServlet(String graphParameter) Creates a new instance using the provided parameter to get the graphml string from the HttpServletRequest later in getGraphInputStream(javax.servlet.http.HttpServletRequest) from.

Method Summary

protected abstract OutputStream	createSaveStream(javax.servlet.http.HttpServletRequest httpServletRequest) Create a stream for the given request to which the data will be sent.
protected void	doGet(javax.servlet.http.HttpServletRequest httpServletRequest, javax.servlet.http.HttpServletResponse httpServletResponse)
protected void	doPost(javax.servlet.http.HttpServletRequest httpServletRequest, javax.servlet.http.HttpServletResponse httpServletResponse)
protected InputStream	getGraphInputStream(javax.servlet.http.HttpServletRequest httpServletRequest) Retrieves the input stream from the request to read the graphml from.

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

Constructor Detail

SaveGraphServlet

protected SaveGraphServlet()

Calls the SaveGraphServlet(String) constructor using AbstractGraphRoundtripSupport.PARAM_GRAPH as the parameter name.

SaveGraphServlet

protected SaveGraphServlet(String graphParameter)

Creates a new instance using the provided parameter to get the graphml string from the HttpServletRequest later in getGraphInputStream(javax.servlet.http.HttpServletRequest) from.

Parameters:

graphParameter - the name of the parameter of null if the ServletInputStream shall be used.

Method Detail

doPost

protected void doPost(javax.servlet.http.HttpServletRequest httpServletRequest,
                      javax.servlet.http.HttpServletResponse httpServletResponse)
               throws javax.servlet.ServletException,
                      IOException

Throws:

javax.servlet.ServletException

IOException

getGraphInputStream

protected InputStream getGraphInputStream(javax.servlet.http.HttpServletRequest httpServletRequest)
                                   throws IOException

Retrieves the input stream from the request to read the graphml from. This implementation uses the ServletRequest.getParameter(String) method using the parameter name specified in the constructor. If no parameter name has been specified the ServletInputStream is returned.

Parameters:

httpServletRequest - the request

Returns:

the stream to read the graph from.

Throws:

IOException - if something bad happened.

createSaveStream

protected abstract OutputStream createSaveStream(javax.servlet.http.HttpServletRequest httpServletRequest)
                                          throws IOException

Create a stream for the given request to which the data will be sent.

Parameters:

httpServletRequest - the request that was used by the client.

Returns:

a stream

Throws:

IOException - if something goes wrong

doGet

protected void doGet(javax.servlet.http.HttpServletRequest httpServletRequest,
                     javax.servlet.http.HttpServletResponse httpServletResponse)
              throws javax.servlet.ServletException,
                     IOException

Throws:

javax.servlet.ServletException

IOException