diff -r 32653a09f0db -r 77f7135b6eb1 javap/src/main/java/org/apidesign/javap/StackMapTableData.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/javap/src/main/java/org/apidesign/javap/StackMapTableData.java	Fri Nov 16 08:08:36 2012 +0100
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2005, 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.apidesign.javap;
+
+import java.io.*;
+
+import static org.apidesign.javap.RuntimeConstants.*;
+
+/* represents one entry of StackMapTable attribute
+ */
+class StackMapTableData {
+    final int frameType;
+    int offsetDelta;
+
+    StackMapTableData(int frameType) {
+        this.frameType = frameType;
+    }
+
+    static class SameFrame extends StackMapTableData {
+        SameFrame(int frameType, int offsetDelta) {
+            super(frameType);
+            this.offsetDelta = offsetDelta;
+        }
+    }
+
+    static class SameLocals1StackItem extends StackMapTableData {
+        final int[] stack;
+        SameLocals1StackItem(int frameType, int offsetDelta, int[] stack) {
+            super(frameType);
+            this.offsetDelta = offsetDelta;
+            this.stack = stack;
+        }
+    }
+
+    static class ChopFrame extends StackMapTableData {
+        ChopFrame(int frameType, int offsetDelta) {
+            super(frameType);
+            this.offsetDelta = offsetDelta;
+        }
+    }
+
+    static class AppendFrame extends StackMapTableData {
+        final int[] locals;
+        AppendFrame(int frameType, int offsetDelta, int[] locals) {
+            super(frameType);
+            this.offsetDelta = offsetDelta;
+            this.locals = locals;
+        }
+    }
+
+    static class FullFrame extends StackMapTableData {
+        final int[] locals;
+        final int[] stack;
+        FullFrame(int offsetDelta, int[] locals, int[] stack) {
+            super(FULL_FRAME);
+            this.offsetDelta = offsetDelta;
+            this.locals = locals;
+            this.stack = stack;
+        }
+    }
+
+    static StackMapTableData getInstance(DataInputStream in, MethodData method)
+                  throws IOException {
+        int frameType = in.readUnsignedByte();
+
+        if (frameType < SAME_FRAME_BOUND) {
+            // same_frame
+            return new SameFrame(frameType, frameType);
+        } else if (SAME_FRAME_BOUND <= frameType && frameType < SAME_LOCALS_1_STACK_ITEM_BOUND) {
+            // same_locals_1_stack_item_frame
+            // read additional single stack element
+            return new SameLocals1StackItem(frameType,
+                                            (frameType - SAME_FRAME_BOUND),
+                                            StackMapData.readTypeArray(in, 1, method));
+        } else if (frameType == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
+            // same_locals_1_stack_item_extended
+            return new SameLocals1StackItem(frameType,
+                                            in.readUnsignedShort(),
+                                            StackMapData.readTypeArray(in, 1, method));
+        } else if (SAME_LOCALS_1_STACK_ITEM_EXTENDED < frameType  && frameType < SAME_FRAME_EXTENDED) {
+            // chop_frame or same_frame_extended
+            return new ChopFrame(frameType, in.readUnsignedShort());
+        } else if (frameType == SAME_FRAME_EXTENDED) {
+            // chop_frame or same_frame_extended
+            return new SameFrame(frameType, in.readUnsignedShort());
+        } else if (SAME_FRAME_EXTENDED < frameType  && frameType < FULL_FRAME) {
+            // append_frame
+            return new AppendFrame(frameType, in.readUnsignedShort(),
+                                   StackMapData.readTypeArray(in, frameType - SAME_FRAME_EXTENDED, method));
+        } else if (frameType == FULL_FRAME) {
+            // full_frame
+            int offsetDelta = in.readUnsignedShort();
+            int locals_size = in.readUnsignedShort();
+            int[] locals = StackMapData.readTypeArray(in, locals_size, method);
+            int stack_size = in.readUnsignedShort();
+            int[] stack = StackMapData.readTypeArray(in, stack_size, method);
+            return new FullFrame(offsetDelta, locals, stack);
+        } else {
+            throw new ClassFormatError("unrecognized frame_type in StackMapTable");
+        }
+    }
+}