--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/visualizer/Data/src/com/sun/hotspot/igv/data/InputEdge.java	Tue Feb 07 22:41:09 2012 +0100
@@ -0,0 +1,138 @@
+/*
+ * 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.Comparator;
+
+/**
+ *
+ * @author Thomas Wuerthinger
+ */
+public class InputEdge {
+
+    public enum State {
+
+        SAME,
+        NEW,
+        DELETED
+    }
+    
+    public static final Comparator<InputEdge> OUTGOING_COMPARATOR = new Comparator<InputEdge>(){
+
+        @Override
+            public int compare(InputEdge o1, InputEdge o2) {
+                if(o1.getFromIndex() == o2.getFromIndex()) {
+                    return o1.getTo() - o2.getTo();
+                }
+                return o1.getFromIndex() - o2.getFromIndex();
+            }
+    };
+    
+    
+    public static final Comparator<InputEdge> INGOING_COMPARATOR = new Comparator<InputEdge>(){
+
+        @Override
+            public int compare(InputEdge o1, InputEdge o2) {
+                if(o1.getToIndex() == o2.getToIndex()) {
+                    return o1.getFrom() - o2.getFrom();
+                }
+                return o1.getToIndex() - o2.getToIndex();
+            }
+    };
+
+    private char toIndex;
+    private char fromIndex;
+    private int from;
+    private int to;
+    private State state;
+    private String label;
+
+    public InputEdge(char toIndex, int from, int to) {
+        this((char) 0, toIndex, from, to, null);
+    }
+
+    public InputEdge(char fromIndex, char toIndex, int from, int to) {
+        this(fromIndex, toIndex, from, to, null);
+    }
+
+    public InputEdge(char fromIndex, char toIndex, int from, int to, String label) {
+        this.toIndex = toIndex;
+        this.fromIndex = fromIndex;
+        this.from = from;
+        this.to = to;
+        this.state = State.SAME;
+        this.label = label;
+    }
+
+    public State getState() {
+        return state;
+    }
+
+    public void setState(State x) {
+        this.state = x;
+    }
+
+    public char getToIndex() {
+        return toIndex;
+    }
+    
+    public char getFromIndex() {
+        return fromIndex;
+    }
+
+    public String getName() {
+        return "in" + toIndex;
+    }
+
+    public int getFrom() {
+        return from;
+    }
+
+    public int getTo() {
+        return to;
+    }
+
+    public String getLabel() {
+        return label;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (o == null || !(o instanceof InputEdge)) {
+            return false;
+        }
+        InputEdge conn2 = (InputEdge) o;
+        return conn2.fromIndex == fromIndex && conn2.toIndex == toIndex && conn2.from == from && conn2.to == to;
+    }
+
+    @Override
+    public String toString() {
+        return "Edge from " + from + " to " + to + "(" + (int) fromIndex + ", " + (int) toIndex + ") ";
+    }
+
+    @Override
+    public int hashCode() {
+        return (from << 20 | to << 8 | toIndex << 4 | fromIndex);
+    }
+}