--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/visualizer/SelectionCoordinator/src/com/sun/hotspot/igv/selectioncoordinator/SelectionCoordinator.java	Tue Feb 07 22:41:09 2012 +0100
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package com.sun.hotspot.igv.selectioncoordinator;
+
+import com.sun.hotspot.igv.data.ChangedEvent;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ *
+ * @author Thomas
+ */
+public class SelectionCoordinator {
+
+    private static SelectionCoordinator singleInstance = new SelectionCoordinator();
+    private Set<Object> selectedObjects;
+    private Set<Object> highlightedObjects;
+    private ChangedEvent<SelectionCoordinator> selectedChangedEvent;
+    private ChangedEvent<SelectionCoordinator> highlightedChangedEvent;
+
+    public static SelectionCoordinator getInstance() {
+        return singleInstance;
+    }
+
+    private SelectionCoordinator() {
+        selectedChangedEvent = new ChangedEvent<>(this);
+        highlightedChangedEvent = new ChangedEvent<>(this);
+        selectedObjects = new HashSet<>();
+        highlightedObjects = new HashSet<>();
+    }
+
+    public Set<Object> getSelectedObjects() {
+        return Collections.unmodifiableSet(selectedObjects);
+    }
+
+    public Set<Object> getHighlightedObjects() {
+        return Collections.unmodifiableSet(highlightedObjects);
+    }
+
+    public ChangedEvent<SelectionCoordinator> getHighlightedChangedEvent() {
+        return highlightedChangedEvent;
+    }
+
+    public ChangedEvent<SelectionCoordinator> getSelectedChangedEvent() {
+        return selectedChangedEvent;
+    }
+
+    public void addHighlighted(Object o) {
+        if (!highlightedObjects.contains(o)) {
+            highlightedObjects.add(o);
+            highlightedObjectsChanged();
+        }
+    }
+
+    public void removeHighlighted(Object o) {
+        if (highlightedObjects.contains(o)) {
+            highlightedObjects.remove(o);
+            highlightedObjectsChanged();
+        }
+    }
+
+    public void addAllHighlighted(Set<? extends Object> s) {
+        int oldSize = highlightedObjects.size();
+        highlightedObjects.addAll(s);
+        if (oldSize != highlightedObjects.size()) {
+            highlightedObjectsChanged();
+        }
+    }
+
+    public void removeAllHighlighted(Set<? extends Object> s) {
+        int oldSize = highlightedObjects.size();
+        highlightedObjects.removeAll(s);
+        if (oldSize != highlightedObjects.size()) {
+            highlightedObjectsChanged();
+        }
+    }
+
+    private void highlightedObjectsChanged() {
+        highlightedChangedEvent.fire();
+    }
+
+    public void addAllSelected(Set<? extends Object> s) {
+        int oldSize = selectedObjects.size();
+        selectedObjects.addAll(s);
+        if (oldSize != selectedObjects.size()) {
+            selectedObjectsChanged();
+        }
+    }
+
+    public void removeAllSelected(Set<? extends Object> s) {
+        int oldSize = selectedObjects.size();
+        selectedObjects.removeAll(s);
+        if (oldSize != selectedObjects.size()) {
+            selectedObjectsChanged();
+        }
+    }
+
+    public void setSelectedObjects(Set<? extends Object> s) {
+        assert s != null;
+        selectedObjects.clear();
+        selectedObjects.addAll(s);
+        selectedObjectsChanged();
+    }
+
+    private void selectedObjectsChanged() {
+        selectedChangedEvent.fire();
+    }
+
+    public void setHighlightedObjects(Set<? extends Object> s) {
+        assert s != null;
+        this.highlightedObjects.clear();
+        this.highlightedObjects.addAll(s);
+        highlightedObjectsChanged();
+    }
+}