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

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

All Implemented Interfaces:

java.io.Serializable, Servlet, ServletConfig

public class ExportServlet

extends HttpServlet

Simple export servlet that takes the export data from the request and creates a file download for it.

See Also:

Serialized Form

Field Summary

static java.lang.String

PARAM_EXPORT_DATA

Constructor Summary

ExportServlet()
Calls the ExportServlet(String) constructor using PARAM_EXPORT_DATA as the parameter name.

ExportServlet(java.lang.String exportDataParameter)
Calls the ExportServlet(String,String) constructor using "image/png" as the contentType paramater.

ExportServlet(java.lang.String exportDataParameter, java.lang.String contentType)
Creates a new instance using the provided export data parameter to get the export data from the HttpServletRequest later in getExportDataInputStream(javax.servlet.http.HttpServletRequest) from.

Method Summary

protected void	doGet(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
protected void	doPost(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
java.lang.String	getContentType() Get the content type that will be used for the response header.
protected java.io.InputStream	getExportDataInputStream(HttpServletRequest httpServletRequest) Retrieves the input stream from the request to read the export data from.
void	setContentType(java.lang.String value) Set the content type that will be used for the response header.

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

Field Detail

PARAM_EXPORT_DATA

public static final java.lang.String PARAM_EXPORT_DATA

See Also:

Constant Field Values

Constructor Detail

ExportServlet

public ExportServlet()

Calls the ExportServlet(String) constructor using PARAM_EXPORT_DATA as the parameter name.

ExportServlet

public ExportServlet(java.lang.String exportDataParameter)

Calls the ExportServlet(String,String) constructor using "image/png" as the contentType paramater.

ExportServlet

public ExportServlet(java.lang.String exportDataParameter,
                     java.lang.String contentType)

Creates a new instance using the provided export data parameter to get the export data from the HttpServletRequest later in getExportDataInputStream(javax.servlet.http.HttpServletRequest) from.

Parameters:

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

contentType - The content type to use for the response header.

Method Detail

doGet

protected void doGet(HttpServletRequest httpServletRequest,
                     HttpServletResponse httpServletResponse)
              throws java.io.IOException

Throws:

java.io.IOException

getContentType

public java.lang.String getContentType()

Get the content type that will be used for the response header.

Depending on the servlet container configuration, the response content type might determine whether the servlet container sends a compressed response.

Returns:

A content MIME type. The default value is "image/png".

setContentType

public void setContentType(java.lang.String value)

Set the content type that will be used for the response header.

Parameters:

value - The content type string. The default is "image/png"..

getExportDataInputStream

protected java.io.InputStream getExportDataInputStream(HttpServletRequest httpServletRequest)
                                                throws java.io.IOException

Retrieves the input stream from the request to read the export data 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 used. A Base64InputStream is wrapped around the used input stream.

Parameters:

httpServletRequest - the request

Returns:

the stream to read the graph from.

Throws:

java.io.IOException - if something bad happened.

doPost

protected void doPost(HttpServletRequest httpServletRequest,
                      HttpServletResponse httpServletResponse)
               throws ServletException,
                      java.io.IOException

Throws:

ServletException

java.io.IOException