--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/visualizer/Data/src/com/sun/hotspot/igv/data/InputBlockEdge.java	Tue Feb 07 22:41:09 2012 +0100
@@ -0,0 +1,80 @@
+/*
+ * 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;
+
+/**
+ *
+ * @author Thomas Wuerthinger
+ */
+public class InputBlockEdge {
+
+    public enum State {
+        SAME,
+        NEW,
+        DELETED
+    }
+
+    private InputBlock from;
+    private InputBlock to;
+    private State state = State.SAME;
+
+    public InputBlockEdge(InputBlock from, InputBlock to) {
+        assert from != null;
+        assert to != null;
+        this.from = from;
+        this.to = to;
+    }
+
+    public InputBlock getFrom() {
+        return from;
+    }
+
+    public InputBlock getTo() {
+        return to;
+    }
+
+    public State getState() {
+        return state;
+    }
+
+    public void setState(State state) {
+        this.state = state;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj != null && obj instanceof InputBlockEdge) {
+            InputBlockEdge e = (InputBlockEdge) obj;
+            return e.from.equals(from) && e.to.equals(to);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = from.hashCode();
+        hash = 59 * hash + to.hashCode();
+        return hash;
+    }
+}