+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.scenegraph.profile.common;\r
+\r
+import java.util.Map;\r
+import java.util.Set;\r
+import java.util.concurrent.ConcurrentHashMap;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.procedure.SetListener;\r
+import org.simantics.scenegraph.profile.Group;\r
+import org.simantics.scenegraph.profile.Observer;\r
+import org.simantics.scenegraph.profile.Style;\r
+\r
+public class ObserverGroupListener implements SetListener<Resource> {\r
+\r
+ final Map<Object, Object> items = new ConcurrentHashMap<Object, Object>();\r
+ final Map<Resource, Resource> entries = new ConcurrentHashMap<Resource, Resource>();\r
+\r
+ protected final Style style;\r
+ protected final Group group;\r
+ protected final Observer observer;\r
+ private boolean disposed = false;\r
+\r
+ public ObserverGroupListener(Style style, Group group, Observer observer) {\r
+ assert(style != null);\r
+ assert(group != null);\r
+ assert(observer != null);\r
+ this.style = style;\r
+ this.group = group;\r
+ this.observer = observer;\r
+ }\r
+\r
+ @Override\r
+ public void add(Resource item) {\r
+ //System.out.println("Add to group(" + this + "): " + item);\r
+ items.put(item, item);\r
+ observer.update();\r
+ }\r
+\r
+ @Override\r
+ public void remove(Resource item) {\r
+// new Exception().printStackTrace();\r
+ //System.out.println("Remove from group(" + this + "): " + item);\r
+ items.remove(item);\r
+ observer.update();\r
+ }\r
+\r
+ @Override\r
+ public int hashCode() {\r
+ return observer.hashCode() + 31 * group.hashCode() + 41 * style.hashCode();\r
+ }\r
+\r
+ @Override\r
+ public boolean equals(Object object) {\r
+ if (this == object)\r
+ return true;\r
+ else if (object == null)\r
+ return false;\r
+ else if (ObserverGroupListener.class != object.getClass())\r
+ return false;\r
+ ObserverGroupListener other = (ObserverGroupListener)object;\r
+ return observer.equals(other.observer) && group.equals(other.group) && style.equals(other.style);\r
+ }\r
+\r
+ public Set<Object> getItems() {\r
+ return items.keySet();\r
+ }\r
+\r
+ public void dispose() {\r
+ this.disposed = true;\r
+ }\r
+\r
+ @Override\r
+ public boolean isDisposed() {\r
+ return disposed || observer.isDisposed();\r
+ }\r
+\r
+ @Override\r
+ public void exception(Throwable throwable) {\r
+ observer.exception(throwable);\r
+ }\r
+\r
+ public void addEntry(Resource entry) {\r
+ entries.put(entry, entry);\r
+ }\r
+\r
+ public void removeEntry(Resource entry) {\r
+ entries.remove(entry);\r
+ }\r
+\r
+ public boolean hasEntries() {\r
+ return !entries.isEmpty();\r
+ }\r
+\r
+}\r