--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/tools/IdealGraphVisualizer/Graph/src/com/sun/hotspot/igv/graph/Block.java	Wed Apr 29 08:31:28 2015 +0200
@@ -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.graph;
+
+import com.sun.hotspot.igv.data.InputBlock;
+import com.sun.hotspot.igv.layout.Cluster;
+import java.awt.Rectangle;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ *
+ * @author Thomas Wuerthinger
+ */
+public class Block implements Cluster {
+
+    private InputBlock inputBlock;
+    private Rectangle bounds;
+    private Diagram diagram;
+
+    public Block(InputBlock inputBlock, Diagram diagram) {
+        this.inputBlock = inputBlock;
+        this.diagram = diagram;
+    }
+
+    public Cluster getOuter() {
+        return null;
+    }
+
+    public InputBlock getInputBlock() {
+        return inputBlock;
+    }
+
+    public Set<? extends Cluster> getSuccessors() {
+        Set<Block> succs = new HashSet<Block>();
+        for (InputBlock b : inputBlock.getSuccessors()) {
+            succs.add(diagram.getBlock(b));
+        }
+        return succs;
+    }
+
+    public void setBounds(Rectangle r) {
+        this.bounds = r;
+    }
+
+    public Rectangle getBounds() {
+        return bounds;
+    }
+
+    public int compareTo(Cluster o) {
+        return toString().compareTo(o.toString());
+    }
+
+    @Override
+    public String toString() {
+        return inputBlock.getName();
+    }
+}
+