org.deegree.portal.standard.context.control
Class DownloadListener

java.lang.Object
  org.deegree.enterprise.control.AbstractListener
      org.deegree.portal.standard.context.control.DownloadListener

All Implemented Interfaces:

EventListener, WebListener

public class DownloadListener
extends AbstractListener

This Listener is used when a user likes to download the WFS data behind a WMS layer.

Version:

$Revision: 20891 $ $Date: 2009-11-19 14:13:56 +0100 (Do, 19. Nov 2009) $

Author:

Andreas Poth, last edited by: $Author: jmays $

Nested Class Summary

protected class

DownloadListener.FeatureTemplate little helper class to store association between IDs and bounding boxes

Constructor Summary

DownloadListener()

Method Summary

void	actionPerformed(FormEvent event)
protected ArrayList<DownloadListener.FeatureTemplate>	createFeatureTemplates(RPCWebEvent event) performs the access to the data marked at the shopping card
protected GetFeature	createGetFeatureRequest(DownloadListener.FeatureTemplate ft, String version, QualifiedName ftName, QualifiedName gtName, GetFeature.RESULT_TYPE resultType) creates a GetFeature request considering the feature type (ID) and the bounding box encapsulated in the passed FeatureTemplate
protected Envelope	extractBBox(RPCStruct bboxStruct) Convenience method to extract the boundig box from an rpc fragment.
protected String	getUserName(String sessionId) gets the user name assigned to the passed session ID from a authentification service.
protected org.deegree.portal.standard.context.control.DownloadListener.RequestBean	getWFSGetFeatureCalls(DownloadListener.FeatureTemplate layer, ViewContext vc) returns the call to be used to perform a GetFeature request for the passed feature template.

Methods inherited from class org.deegree.enterprise.control.AbstractListener

getAlternativeNextPage, getHomePath, getInitParameter, getInitParameterList, getNextPage, getRequest, getReturnValue, gotoErrorPage, handle, setAlternativeNextPage, setDefaultAlternativeNextPage, setDefaultNextPage, setNextPage, setReturnValue, toModel

Methods inherited from class java.lang.Object

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

Constructor Detail

DownloadListener

public DownloadListener()

Method Detail

actionPerformed

public void actionPerformed(FormEvent event)

Specified by:

actionPerformed in interface WebListener

Specified by:

actionPerformed in class AbstractListener

getUserName

protected String getUserName(String sessionId)
                      throws XMLParsingException,
                             IOException,
                             SAXException

gets the user name assigned to the passed session ID from a authentification service. If no user is assigned to the session ID null will be returned. If the session is closed or expired an exception will be thrown

Parameters:

sessionId -

Returns:

name of the user assigned to the passed session ID

Throws:

XMLParsingException

IOException

SAXException

extractBBox

protected Envelope extractBBox(RPCStruct bboxStruct)

Convenience method to extract the boundig box from an rpc fragment.

Parameters:

bboxStruct - the RPCStruct containing the bounding box. For example, <member><name>boundingBox</name>etc....

Returns:

an envelope with the boundaries defined in the rpc structure

createFeatureTemplates

protected ArrayList<DownloadListener.FeatureTemplate> createFeatureTemplates(RPCWebEvent event)
                                                                      throws PortalException,
                                                                             Exception

performs the access to the data marked at the shopping card

Throws:

PortalException

Exception

getWFSGetFeatureCalls

protected org.deegree.portal.standard.context.control.DownloadListener.RequestBean getWFSGetFeatureCalls(DownloadListener.FeatureTemplate layer,
                                                                                                         ViewContext vc)
                                                                                                  throws PortalException

returns the call to be used to perform a GetFeature request for the passed feature template.

Parameters:

layer - used

ft - feature template to find the serving WFS

vc -

Returns:

the call to be used to perform a GetFeature request for the passed feature template

Throws:

PortalException

createGetFeatureRequest

protected GetFeature createGetFeatureRequest(DownloadListener.FeatureTemplate ft,
                                             String version,
                                             QualifiedName ftName,
                                             QualifiedName gtName,
                                             GetFeature.RESULT_TYPE resultType)
                                      throws PortalException

creates a GetFeature request considering the feature type (ID) and the bounding box encapsulated in the passed FeatureTemplate

Parameters:

ft - FeatureTemplate

ftName - a Qualified Name representing the feature type name of the requested feature, ex: app:ZipCodes

gtName - a Qualified Name representing the geometry type name of the requested feature, ex: app:geometry

resultType - the type of result (GetFeature.RESULT_TYPE.HITS or GetFeature.RESULT_TYPE.RESULTS)

Returns:

Throws:

PortalException