X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.scenegraph.profile%2Fsrc%2Forg%2Fsimantics%2Fscenegraph%2Fprofile%2Fcommon%2FObserverGroupListener.java;fp=bundles%2Forg.simantics.scenegraph.profile%2Fsrc%2Forg%2Fsimantics%2Fscenegraph%2Fprofile%2Fcommon%2FObserverGroupListener.java;h=d9151fb4f56a5a3b5ae209fe1d023afc96d7c0e0;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.scenegraph.profile/src/org/simantics/scenegraph/profile/common/ObserverGroupListener.java b/bundles/org.simantics.scenegraph.profile/src/org/simantics/scenegraph/profile/common/ObserverGroupListener.java
new file mode 100644
index 000000000..d9151fb4f
--- /dev/null
+++ b/bundles/org.simantics.scenegraph.profile/src/org/simantics/scenegraph/profile/common/ObserverGroupListener.java
@@ -0,0 +1,105 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.scenegraph.profile.common;
+
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.simantics.db.Resource;
+import org.simantics.db.procedure.SetListener;
+import org.simantics.scenegraph.profile.Group;
+import org.simantics.scenegraph.profile.Observer;
+import org.simantics.scenegraph.profile.Style;
+
+public class ObserverGroupListener implements SetListener<Resource> {
+
+    final Map<Object, Object> items = new ConcurrentHashMap<Object, Object>();
+    final Map<Resource, Resource> entries = new ConcurrentHashMap<Resource, Resource>();
+
+    protected final Style style;
+    protected final Group group;
+    protected final Observer observer;
+    private boolean disposed = false;
+
+    public ObserverGroupListener(Style style, Group group, Observer observer) {
+        assert(style != null);
+        assert(group != null);
+        assert(observer != null);
+        this.style = style;
+        this.group = group;
+        this.observer = observer;
+    }
+
+    @Override
+    public void add(Resource item) {
+        //System.out.println("Add to group(" + this + "): " + item);
+        items.put(item, item);
+        observer.update();
+    }
+
+    @Override
+    public void remove(Resource item) {
+//        new Exception().printStackTrace();
+        //System.out.println("Remove from group(" + this + "): " + item);
+        items.remove(item);
+        observer.update();
+    }
+
+    @Override
+    public int hashCode() {
+        return observer.hashCode() + 31 * group.hashCode() + 41 * style.hashCode();
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (this == object)
+            return true;
+        else if (object == null)
+            return false;
+        else if (ObserverGroupListener.class != object.getClass())
+            return false;
+        ObserverGroupListener other = (ObserverGroupListener)object;
+        return observer.equals(other.observer) && group.equals(other.group) && style.equals(other.style);
+    }
+
+    public Set<Object> getItems() {
+        return items.keySet();
+    }
+
+    public void dispose() {
+        this.disposed = true;
+    }
+
+    @Override
+    public boolean isDisposed() {
+        return disposed || observer.isDisposed();
+    }
+
+    @Override
+    public void exception(Throwable throwable) {
+        observer.exception(throwable);
+    }
+
+    public void addEntry(Resource entry) {
+        entries.put(entry, entry);
+    }
+
+    public void removeEntry(Resource entry) {
+        entries.remove(entry);
+    }
+
+    public boolean hasEntries() {
+        return !entries.isEmpty();
+    }
+
+}