--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/visualizer/Data/src/com/sun/hotspot/igv/data/Group.java	Tue Feb 07 22:41:09 2012 +0100
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2008, 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.data;
+
+import java.util.*;
+
+/**
+ *
+ * @author Thomas Wuerthinger
+ */
+public class Group extends Properties.Entity implements ChangedEventProvider<Group>, Folder, FolderElement {
+
+    private final List<FolderElement> elements;
+    private final List<InputGraph> graphs;
+
+    private InputMethod method;
+    private transient ChangedEvent<Group> changedEvent;
+    private Folder parent;
+
+    public Group(Folder parent) {
+        elements = new ArrayList<>();
+        graphs = new ArrayList<>();
+        changedEvent = new ChangedEvent<>(this);
+        this.parent = parent;
+
+        // Ensure that name and type are never null
+        getProperties().setProperty("name", "");
+        getProperties().setProperty("type", "");
+    }
+
+    public void fireChangedEvent() {
+        changedEvent.fire();
+    }
+
+    public void setMethod(InputMethod method) {
+        this.method = method;
+    }
+
+    public InputMethod getMethod() {
+        return method;
+    }
+
+    @Override
+    public ChangedEvent<Group> getChangedEvent() {
+        return changedEvent;
+    }
+
+    @Override
+    public List<FolderElement> getElements() {
+        return Collections.unmodifiableList(elements);
+    }
+
+    public int getGraphsCount() {
+        return elements.size();
+    }
+    
+    @Override
+    public void addElement(FolderElement element) {
+        elements.add(element);
+        if (element instanceof InputGraph) {
+            graphs.add((InputGraph) element);
+        } else {
+            
+        }
+        element.setParent(this);
+        changedEvent.fire();
+    }
+
+    public Set<Integer> getAllNodes() {
+        Set<Integer> result = new HashSet<>();
+        for (FolderElement e : elements) {
+            if (e instanceof InputGraph) {
+                InputGraph g = (InputGraph) e;
+                result.addAll(g.getNodesAsSet());
+            }
+        }
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("Group ").append(getProperties()).append("\n");
+        for (FolderElement g : elements) {
+            sb.append(g.toString());
+            sb.append('\n');
+        }
+        return sb.toString();
+    }
+
+    @Override
+    public String getName() {
+        return getProperties().get("name");
+    }
+
+    public String getType() {
+        return getProperties().get("type");
+        
+    }
+
+    InputGraph getPrev(InputGraph graph) {
+        InputGraph lastGraph = null;
+        for (FolderElement e : elements) {
+            if (e == graph) {
+                return lastGraph;
+            }
+            if (e instanceof InputGraph) {
+                lastGraph = (InputGraph) e;
+            }
+        }
+        return null;
+    }
+
+    InputGraph getNext(InputGraph graph) {
+        boolean found = false;
+        for (FolderElement e : elements) {
+            if (e == graph) {
+                found = true;
+            } else if (found && e instanceof InputGraph) {
+                return (InputGraph) e;
+            }
+        }
+        return null;
+    }
+
+    public InputGraph getLastGraph() {
+        InputGraph lastGraph = null;
+        for (FolderElement e : elements) {
+            if (e instanceof InputGraph) {
+                lastGraph = (InputGraph) e;
+            }
+        }
+        return lastGraph;
+    }
+
+    @Override
+    public Folder getParent() {
+         return parent;
+    }
+
+    @Override
+    public void removeElement(FolderElement element) {
+        if (elements.remove(element)) {
+            if (element instanceof InputGraph) {
+                graphs.remove((InputGraph) element);
+            }
+            changedEvent.fire();
+        }
+    }
+
+    public List<InputGraph> getGraphs() {
+        return graphs;
+    }
+
+    @Override
+    public void setParent(Folder parent) {
+        this.parent = parent;
+    }
+}