/*
* uDig - User Friendly Desktop Internet GIS client
* http://udig.refractions.net
* (C) 2012, Refractions Research Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD
* License v1.0 (http://udig.refractions.net/files/bsd3-v10.html).
*/
package org.locationtech.udig.project.ui;
import java.util.HashMap;
import java.util.List;
import java.util.logging.Logger;
import org.locationtech.udig.core.internal.ExtensionPointList;
import org.locationtech.udig.project.geoselection.IGeoSelectionChangedListener;
import org.locationtech.udig.project.geoselection.IGeoSelectionManager;
import org.locationtech.udig.project.geoselection.IGeoSelectionService;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.InvalidRegistryObjectException;
/**
* Default UDIG implementation of IGeoSelectionService with a platform selection manager
* working for the currently active MapEditor.
* <p>
*
* @author Vitalus
*
*/
final public class GeoSelectionService implements IGeoSelectionService {
/**
* Logger.
*/
public static Logger LOGGER = Logger.getLogger("org.locationtech.udig.project.geoselection"); //$NON-NLS-1$
/**
* An ID of extension point to add static listeners declaratively.
*/
public static final String EXTENSION_POINT_ID = "org.locationtech.udig.project.geoselection"; //$NON-NLS-1$
private static GeoSelectionService instance;
private IGeoSelectionManager platformSelectionManager = null;
private HashMap<String, IGeoSelectionManager> registeredManagers = new HashMap<String, IGeoSelectionManager>();
private GeoSelectionService() {
platformSelectionManager = new PlatformGeoSelectionManager();
registerSelectionManager(PlatformGeoSelectionManager.ID, platformSelectionManager);
try{
processExtensionPoint();
}catch(Throwable t){
t.printStackTrace();
}
}
/**
* @return
*/
public IGeoSelectionManager getPlatformSelectionManager() {
// if (platformSelectionManager == null) {
// platformSelectionManager = new PlatformGeoSelectionManager();
// registerSelectionManager(PLATFORM_SELECTION_MANAGER_ID, platformSelectionManager);
// }
return platformSelectionManager;
}
public static GeoSelectionService getDefault() {
if (instance == null) {
instance = new GeoSelectionService();
}
return instance;
}
/**
* @param selectionManager
*/
public void registerSelectionManager(String id, IGeoSelectionManager selectionManager ) {
if(registeredManagers.containsKey(id))
throw new IllegalArgumentException("The IGeoSelectionManager instance with id= "+id+" is already registered");
registeredManagers.put(id, selectionManager);
}
/**
* @param selectionManager
*/
public void unregisterSelectionManager(String id ) {
registeredManagers.remove(id);
}
public IGeoSelectionManager getSelectionManager(String id){
return registeredManagers.get(id);
}
private void processExtensionPoint(){
List<IConfigurationElement> extensionList = ExtensionPointList
.getExtensionPointList(EXTENSION_POINT_ID);
for( IConfigurationElement element : extensionList ) {
// IExtension extension = element.getDeclaringExtension();
String type = element.getName();
if(type.equals("geoSelectionListener")){
try {
String id = element.getAttribute("id");
String managerId = element.getAttribute("managerId");
Object listenerObj = element.createExecutableExtension("class");
IGeoSelectionChangedListener listener = (IGeoSelectionChangedListener)listenerObj;
IGeoSelectionManager manager = getSelectionManager(managerId);
if(manager != null){
manager.addListener(listener);
}
} catch (InvalidRegistryObjectException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (CoreException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}