--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/lambdaShapes/org/openjdk/tests/shapegen/TTShape.java	Tue Nov 20 09:58:55 2012 -0800
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2012, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 org.openjdk.tests.shapegen;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ *
+ * @author Robert Field
+ */
+public class TTShape {
+
+    private final TTNode root;
+    private final TTNode[] nodes;
+
+    TTShape(TTNode root) {
+        this.root = root;
+        Set<TTNode> subs = new HashSet<>();
+        root.collectAllSubtypes(subs);
+        nodes = subs.toArray(new TTNode[subs.size()]);
+    }
+
+    private List<ClassCase> toCases(boolean includeClasses) {
+        List<ClassCase> ccs = new ArrayList<>();
+        root.start(includeClasses);
+        int i;
+        outer:
+        while (true) {
+            if (root.isValid()) {
+                ClassCase cc = root.genCase();
+                //System.out.println(cc);
+                ccs.add(cc);
+            }
+
+            i = 0;
+            do {
+                if (i >= nodes.length) {
+                    break outer;
+                }
+            } while(!nodes[i++].next());
+        }
+        return ccs;
+    }
+
+   public static List<ClassCase> allCases(boolean includeClasses) {
+        List<ClassCase> ccs = new ArrayList<>();
+        for (TTShape shape : SHAPES) {
+            ccs.addAll(shape.toCases(includeClasses));
+        }
+        return ccs;
+    }
+
+    public static TTShape parse(String s) {
+        return new TTShape(new TTParser(s).parse());
+    }
+
+    public static final TTShape[] SHAPES = new TTShape[] {
+        parse("a"),
+        parse("a(b)"),
+        parse("A(bb)"),
+        parse("A(B(d)c(d))"),
+        parse("A(b(c))"),
+        parse("A(B(cd)d)"),
+        parse("A(B(c)c)"),
+        parse("A(B(Ce)d(e))"),
+        parse("A(B(C)d(e))"),
+        parse("A(Bc(d))"),
+        parse("A(B(d)dc)"),
+        parse("A(B(dc)dc)"),
+        parse("A(B(c(d))d)"),
+        parse("A(B(C(d))d)"),
+        parse("A(B(C(e)d(e))e)"),
+        parse("A(B(c(d))c)"),
+        parse("A(B(dc(d))c)"),
+        parse("A(B(C(d))d)"),
+    };
+
+}