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

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

All Implemented Interfaces:

EventListener, WebListener

public class ContextSwitchListener
extends AbstractContextListener

This class handles switch of map contexts. The basic logic is (1) receiving an rpc request with a context name (xml) and, possibly, a bounding box, (2) transforming this xml using a provided xsl, and (3) forwarding the result back to the browser.
Most of the action takes place in doTransformContext, and is delegated to the ContextTransformer.
In order to perform the transformation from a context xml to a html, a xslt is provided. This is per default called context2HTML.xsl (see the class member DEFAULT_CTXT2HTML) and should be put under ${context-home}/WEB-INF/xml/.

Version:

$Revision: 21693 $, $Date: 2010-01-03 15:07:54 +0100 (So, 03. Jan 2010) $

Author:

Ugo Taddei, Andreas Poth, last edited by: $Author: apoth $

Field Summary

protected URL	ctxt2html A String defining the name of the xsl file that defines the transformation from a context to html.
static String	NEW_CONTEXT_HTML A String used as a key value for the new html (of the client).
protected static String	WEBMAPCTXT2HTML script to transform a standard WMC document into a deegree WMC

Fields inherited from class org.deegree.portal.standard.context.control.AbstractContextListener

userDir

Constructor Summary

ContextSwitchListener()

Method Summary

void	actionPerformed(FormEvent event)
protected String	doTransformContext(XMLFragment xml) Transforms the context pointed to by xml into html using xsl
protected XMLFragment	getContext(String context, Envelope bbox, String sessionID) returns the context to be used as a String
protected void	writeContextToSession(String context, String sessionID) writes the context the user choosed to the users session.

Methods inherited from class org.deegree.portal.standard.context.control.AbstractContextListener

changeBBox, changeLayerList, extractBBox, extractBBox, extractRPCParameters, extractRPCStruct, getContextList, getUserName, getUserPassword, getUsersStartContext, readSessionID, transformToHtmlMapContext

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

Field Detail

NEW_CONTEXT_HTML

public static final String NEW_CONTEXT_HTML

A String used as a key value for the new html (of the client). This key is used in the JSP which output the new(-ly transformed html.

See Also:

Constant Field Values

ctxt2html

protected URL ctxt2html

A String defining the name of the xsl file that defines the transformation from a context to html. This must be placed, together with the map context xml and helper xsl files, under ${context-home}/WEB-INF/conf/igeoportal/.

WEBMAPCTXT2HTML

protected static final String WEBMAPCTXT2HTML

script to transform a standard WMC document into a deegree WMC

See Also:

Constant Field Values

Constructor Detail

ContextSwitchListener

public ContextSwitchListener()

Method Detail

actionPerformed

public void actionPerformed(FormEvent event)

Specified by:

actionPerformed in interface WebListener

Specified by:

actionPerformed in class AbstractListener

writeContextToSession

protected void writeContextToSession(String context,
                                     String sessionID)
                              throws Exception

writes the context the user choosed to the users session. It can be accessed using Constants.CURRENTMAPCONTEXT key value

Parameters:

context -

sessionID -

Throws:

Exception

getContext

protected XMLFragment getContext(String context,
                                 Envelope bbox,
                                 String sessionID)
                          throws Exception

returns the context to be used as a String

Parameters:

context -

bbox -

sessionID -

Returns:

the context as String

Throws:

Exception

doTransformContext

protected String doTransformContext(XMLFragment xml)

Transforms the context pointed to by xml into html using xsl

Parameters:

xml - the context xml

Returns:

the transformed context