001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/portal/portlet/enterprise/WMCUpdateServlet.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.portal.portlet.enterprise;
037
038 import java.io.IOException;
039 import java.net.URL;
040 import java.util.List;
041 import java.util.Map;
042
043 import javax.servlet.ServletException;
044 import javax.servlet.http.HttpServlet;
045 import javax.servlet.http.HttpServletRequest;
046 import javax.servlet.http.HttpServletResponse;
047
048 import org.deegree.framework.log.ILogger;
049 import org.deegree.framework.log.LoggerFactory;
050 import org.deegree.framework.util.KVP2Map;
051 import org.deegree.framework.util.StringPair;
052 import org.deegree.framework.util.StringTools;
053 import org.deegree.model.crs.CoordinateSystem;
054 import org.deegree.model.spatialschema.Envelope;
055 import org.deegree.model.spatialschema.GeometryFactory;
056 import org.deegree.model.spatialschema.Point;
057 import org.deegree.portal.PortalUtils;
058 import org.deegree.portal.context.ContextException;
059 import org.deegree.portal.context.Layer;
060 import org.deegree.portal.context.LayerList;
061 import org.deegree.portal.context.Node;
062 import org.deegree.portal.context.ViewContext;
063 import org.deegree.portal.portlet.modules.actions.IGeoPortalPortletPerform;
064
065 /**
066 * The servlet will be used to update a map model (Web Map Context) in the background (using an
067 * invisible iframe) from an iGeoPortal Portlet Edition
068 *
069 *
070 * @version $Revision: 18195 $
071 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
072 * @author last edited by: $Author: mschneider $
073 *
074 * @version 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
075 *
076 * @since 2.0
077 */
078 public class WMCUpdateServlet extends HttpServlet {
079
080 private static final long serialVersionUID = 2927537039728672671L;
081
082 private static final ILogger LOG = LoggerFactory.getLogger( WMCUpdateServlet.class );
083
084 @Override
085 public void init()
086 throws ServletException {
087 super.init();
088 }
089
090 @Override
091 protected void doGet( HttpServletRequest request, HttpServletResponse response )
092 throws ServletException, IOException {
093
094 doPost( request, response );
095 }
096
097 @Override
098 protected void doPost( HttpServletRequest request, HttpServletResponse response )
099 throws ServletException, IOException {
100
101 Map<String, String> parameter = KVP2Map.toMap( request );
102
103 String mm = parameter.get( "MAPPORTLET" );
104 String nodeValue = parameter.get( "NODE" );
105 String action = parameter.get( "ACTION" );
106
107 LOG.logDebug( "parameter: " + parameter );
108
109 IGeoPortalPortletPerform igeo = new IGeoPortalPortletPerform( request, null, getServletContext() );
110
111 try {
112 // Handle ajax/iframe requests.
113 // All arguments are passed via a parameter map, see the handelXxxXxx
114 // static methods for the accepted parameters.
115
116 // The parameter NODE identifies the affected node/layer:
117 // nodes are passed as 'node-xx' where xx is the number/id
118 // layers are passed as 'layername|serveraddress'
119 if ( action != null && mm != null && nodeValue != null ) {
120 ViewContext vc = igeo.getCurrentViewContext( mm );
121
122 // send parts of a layer tree
123 if ( action.equalsIgnoreCase( "TREEDATA" ) ) {
124 // writes into response stream
125 handleTreeData( parameter, vc, response );
126 return;
127 }
128
129 // handle actions on nodes/layers
130 boolean repaintMap = true;
131 if ( action.equalsIgnoreCase( "MOVENODE" ) ) {
132 repaintMap = handleMoveNode( parameter, vc );
133 } else if ( action.equalsIgnoreCase( "ADDNODE" ) ) {
134 String nextNodeID = handleAddNode( parameter, vc );
135 request.setAttribute( "NEXTNODEID", nextNodeID );
136 repaintMap = false;
137 } else if ( action.equalsIgnoreCase( "REMOVENODE" ) ) {
138 handleRemoveNode( parameter, vc );
139 } else if ( action.equalsIgnoreCase( "RENAMENODE" ) ) {
140 handleRenameNode( parameter, vc );
141 repaintMap = false;
142 } else if ( action.equalsIgnoreCase( "SETVISIBILITY" ) ) {
143 handleSetVisibility( parameter, vc );
144 }
145 if ( repaintMap ) {
146 // if the visible layers changed,
147 // send new baserequests to client ( see igeoportal/enterprise.jsp)
148 request.setAttribute( "UPDATE_BASEREQUESTS", true );
149 request.setAttribute( "VIEWCONTEXT", vc );
150 }
151 } else if ( mm != null ) {
152 // update bbox
153 ViewContext vc = igeo.getCurrentViewContext( mm );
154
155 String bbox = parameter.get( IGeoPortalPortletPerform.PARAM_BBOX );
156
157 if ( bbox != null && vc != null ) {
158 double[] coords = StringTools.toArrayDouble( bbox, "," );
159 CoordinateSystem crs = vc.getGeneral().getBoundingBox()[0].getCoordinateSystem();
160 Point[] pt = new Point[2];
161 pt[0] = GeometryFactory.createPoint( coords[0], coords[1], crs );
162 pt[1] = GeometryFactory.createPoint( coords[2], coords[3], crs );
163 try {
164 vc.getGeneral().setBoundingBox( pt );
165 } catch ( ContextException should_never_happen ) {
166 //nottin
167 }
168 List<Envelope> history = (List<Envelope>) request.getSession().getAttribute(
169 IGeoPortalPortletPerform.SESSION_HISTORY );
170 int p = (Integer) request.getSession().getAttribute(
171 IGeoPortalPortletPerform.SESSION_HISTORYPOSITION );
172 Envelope current = history.get( p );
173 Envelope env = GeometryFactory.createEnvelope( coords[0], coords[1], coords[2], coords[3], null );
174 if ( current == null || !current.equals( env ) ) {
175 p++;
176 history.add( p, env );
177 request.getSession().setAttribute( IGeoPortalPortletPerform.SESSION_HISTORYPOSITION, p );
178 }
179 }
180
181 if ( bbox != null && parameter.get( "LAYERS" ) != null ) {
182 // just change layerlist if the request contains a BBOX parameter
183 // and at least one layer because other wise it will be the initial call;
184 Layer[] layers = vc.getLayerList().getLayers();
185 String ly = parameter.get( "LAYERS" );
186 StringBuffer sb = new StringBuffer( 100 );
187 for ( int i = 0; i < layers.length; i++ ) {
188 sb.append( layers[i].getName() ).append( '|' );
189 sb.append( layers[i].getServer().getOnlineResource() );
190 if ( ly.indexOf( sb.toString() ) > -1 ) {
191 layers[i].setHidden( false );
192 } else {
193 layers[i].setHidden( true );
194 }
195 sb.delete( 0, sb.length() );
196 }
197 igeo.setCurrentMapContext( vc, mm );
198 }
199 } else {
200 System.out.println( "no mapmodel defined in request; ensure that parameter 'MAPPORTLET' is defined!" );
201 }
202 } catch ( Exception e ) {
203 e.printStackTrace();
204 LOG.logError( "could not update WMC: " + e.getMessage(), e );
205 }
206 request.setAttribute( "ACTION", getInitParameter( "ACTION" ) );
207
208 request.getRequestDispatcher( "igeoportal/enterprise.jsp" ).forward( request, response );
209 }
210
211 /**
212 * moves a node/layer to a new position used parameters: NODE, BEFORENODE, PARENTNODE
213 *
214 * @return true if moved layer/node was visible and a repaint is necessary
215 */
216 private static boolean handleMoveNode( Map<String, String> parameter, ViewContext vc ) {
217 int nodeID = getNodeID( parameter, "NODE" );
218 boolean visibleLayer;
219 if ( nodeID != -1 ) { // move a node
220 int beforeNodeID = getNodeID( parameter, "BEFORENODE" );
221 int parentNodeID = getNodeID( parameter, "PARENTNODE" );
222 vc.getLayerList().moveNodes( nodeID, beforeNodeID );
223 Node node = vc.getGeneral().getExtension().getLayerTreeRoot().getNode( nodeID );
224 Node parent;
225 if ( parentNodeID == -1 ) {
226 parent = vc.getGeneral().getExtension().getLayerTreeRoot();
227 } else {
228 parent = vc.getGeneral().getExtension().getLayerTreeRoot().getNode( parentNodeID );
229 }
230 node.getParent().removeNode( nodeID );
231 node.setParent( parent );
232 int beforeNodeIndex = parent.getIndex( beforeNodeID );
233 if ( beforeNodeIndex == -1 ) {
234 parent.appendNode( node );
235 } else {
236 parent.insertNode( node, beforeNodeIndex );
237 }
238 visibleLayer = PortalUtils.hasNodeVisibleLayers( vc, nodeID );
239 } else { // move a layer with layer/servername
240 StringPair layerName = getLayer( parameter, "NODE" );
241 StringPair beforeLayerName = getLayer( parameter, "BEFORENODE" );
242 int parentNodeId = getNodeID( parameter, "PARENTNODE" );
243 Layer layer = vc.getLayerList().getLayer( layerName.first, layerName.second );
244 layer.getExtension().setParentNodeId( parentNodeId );
245 Layer beforeLayer = null;
246 if ( beforeLayerName.second != "" ) {
247 beforeLayer = vc.getLayerList().getLayer( beforeLayerName.first, beforeLayerName.second );
248 }
249 vc.getLayerList().move( layer, beforeLayer );
250 visibleLayer = !layer.isHidden();
251 }
252 return visibleLayer;
253 }
254
255 /**
256 * rename a node used parameters: NODE and NODETITLE
257 */
258 private static void handleRenameNode( Map<String, String> parameter, ViewContext vc )
259 throws ContextException {
260 int nodeID = getNodeID( parameter, "NODE" );
261 String title = parameter.get( "NODETITLE" );
262 if ( title != null ) {
263 if ( nodeID != -1 ) {
264 vc.getGeneral().getExtension().getLayerTreeRoot().getNode( nodeID ).setTitle( title );
265 }
266 }
267 }
268
269 /**
270 * removes a layer/node. when a node is removed, all child nodes/layers will be removed too used
271 * parameters: NODE
272 */
273 private static void handleRemoveNode( Map<String, String> parameter, ViewContext vc ) {
274 int nodeID = getNodeID( parameter, "NODE" );
275 if ( nodeID != -1 ) {
276 vc.getLayerList().removeLayers( nodeID );
277 vc.getGeneral().getExtension().getLayerTreeRoot().removeNode( nodeID );
278 } else {
279 StringPair layer = getLayer( parameter, "NODE" );
280 vc.getLayerList().removeLayer( layer.first, layer.second );
281 }
282 }
283
284 /**
285 * adds a new node to the context used parameters: NODE, NODETITLE, PARENTNODE
286 *
287 * @return id for the next new node
288 */
289 private static String handleAddNode( Map<String, String> parameter, ViewContext vc )
290 throws ContextException {
291 int nodeID = getNodeID( parameter, "NODE" );
292 int parentNodeID = getNodeID( parameter, "PARENTNODE" );
293 String nodeTitle = parameter.get( "NODETITLE" );
294 if ( nodeTitle == null ) {
295 nodeTitle = "";
296 }
297 Node root = vc.getGeneral().getExtension().getLayerTreeRoot();
298 if ( parentNodeID != -1 ) {
299 root = root.getNode( parentNodeID );
300 }
301 Node newNode = new Node( nodeID, root, nodeTitle, true, true );
302 root.insertNode( newNode, 0 );
303 String nextNodeID = "node-" + ( root.getMaxNodeId() + 1 );
304 return nextNodeID;
305 }
306
307 /**
308 * sets visibility for layers or complete nodes used parameters: HIDDEN (boolean) and NODE
309 */
310 private static void handleSetVisibility( Map<String, String> parameter, ViewContext vc ) {
311 boolean hidden = Boolean.parseBoolean( parameter.get( "HIDDEN" ) );
312 int nodeID = getNodeID( parameter, "NODE" );
313 if ( nodeID != -1 ) { // change complete node
314 PortalUtils.setVisibility( vc, nodeID, hidden );
315 } else { // change single layer
316 StringPair layerName = getLayer( parameter, "NODE" );
317 Layer layer = vc.getLayerList().getLayer( layerName.first, layerName.second );
318 layer.setHidden( hidden );
319 }
320 }
321
322 /**
323 * sends layer/node data for requested node as JSON to response stream used parameters: NODE
324 */
325 private static void handleTreeData( Map<String, String> parameter, ViewContext vc, HttpServletResponse response )
326 throws IOException {
327 StringBuilder sb = new StringBuilder();
328 sb.append( '[' );
329
330 LayerList layerList = vc.getLayerList();
331 String nodeValue = parameter.get( "NODE" );
332 // root node
333 if ( nodeValue.equals( "/" ) ) {
334 // return all nodes for root
335 Node[] nodes = vc.getGeneral().getExtension().getLayerTreeRoot().getNodes();
336 for ( Node n : nodes ) {
337 boolean hidden = !PortalUtils.hasNodeVisibleLayers( vc, n.getId() );
338 sb.append( String.format( "{'text': '%s', 'iconCls': 'folder', 'id':'node-%s', "
339 + "'leaf': false, 'checked': %s, 'expanded': true},", n.getTitle(),
340 n.getId(), hidden ? "false" : "true" ) );
341 }
342 } else {
343 int nodeID = getNodeID( parameter, "NODE" );
344 if ( nodeID != -1 ) {
345 // first add the nodes...
346 Node[] nodes = vc.getGeneral().getExtension().getLayerTreeRoot().getNode( nodeID ).getNodes();
347 for ( Node n : nodes ) {
348 boolean hidden = !PortalUtils.hasNodeVisibleLayers( vc, n.getId() );
349 sb.append( String.format( "{'text': '%s', 'iconCls': 'folder', 'id':'node-%s', "
350 + "'leaf': false, 'checked': %s},", n.getTitle(), n.getId(),
351 hidden ? "false" : "true" ) );
352 }
353 // ...then all layers for this node
354 for ( Layer layer : layerList.getLayersByNodeId( nodeID ) ) {
355 if ( layer.getServer().getCapabilities() != null ) {
356 URL s = null;
357 if ( layer.getStyleList().getCurrentStyle().getLegendURL() != null ) {
358 s = layer.getStyleList().getCurrentStyle().getLegendURL().getOnlineResource();
359 }
360 sb.append( String.format(
361 "{'text': '%s', 'id':'%s', 'leaf': true, 'checked': %s, 'img': '%s'},",
362 layer.getTitle(), layer.getName() + '|'
363 + layer.getServer().getOnlineResource(),
364 layer.isHidden() ? "false" : "true", s ) );
365 }
366 }
367 }
368 }
369 sb.append( ']' );
370 String fixedDemoOutput = sb.toString();
371 response.setContentType( "application/json" );
372 response.setCharacterEncoding( "utf-8" );
373 response.getWriter().write( fixedDemoOutput );
374 }
375
376 /**
377 * extracts the numeric node id from the node id sting (eg. (String)node-42 -> (int)42)
378 *
379 * @param parameter
380 * the parameter map
381 * @param paramName
382 * key of the parameter
383 * @return the node id or -1, if not found
384 */
385 private static int getNodeID( Map<String, String> parameter, String paramName ) {
386 String paramValue = parameter.get( paramName.toUpperCase() );
387 int nodeID = -1;
388 if ( paramValue != null && paramValue.startsWith( "node-" ) ) {
389 nodeID = Integer.parseInt( paramValue.substring( paramValue.lastIndexOf( '-' ) + 1 ) );
390 }
391 return nodeID;
392 }
393
394 /**
395 * extracts the layer and servername from a node id
396 *
397 * @param parameter
398 * the parameter map
399 * @param paramName
400 * key of the parameter
401 * @return the layer (first) and servername (second)
402 */
403 private static StringPair getLayer( Map<String, String> parameter, String paramName ) {
404 String paramValue = parameter.get( paramName.toUpperCase() );
405 StringPair result = new StringPair();
406 if ( paramValue != null ) {
407 String[] values = paramValue.split( "\\|", 2 );
408 result.first = values[0];
409 if ( values.length == 2 ) {
410 result.second = values[1];
411 } else {
412 result.second = "";
413 }
414 }
415 return result;
416 }
417
418 }