--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/org/msgpack/unpacker/BigIntegerAccept.java	Sat Oct 18 15:06:15 2014 +0900
@@ -0,0 +1,76 @@
+//
+// MessagePack for Java
+//
+// Copyright (C) 2009 - 2013 FURUHASHI Sadayuki
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//        http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+//
+package org.msgpack.unpacker;
+
+import java.math.BigInteger;
+
+final class BigIntegerAccept extends Accept {
+    BigInteger value;
+
+    BigIntegerAccept() {
+        super("integer");
+    }
+
+    @Override
+    void acceptInteger(byte v) {
+        this.value = BigInteger.valueOf((long) v);
+    }
+
+    @Override
+    void acceptInteger(short v) {
+        this.value = BigInteger.valueOf((long) v);
+    }
+
+    @Override
+    void acceptInteger(int v) {
+        this.value = BigInteger.valueOf((long) v);
+    }
+
+    @Override
+    void acceptInteger(long v) {
+        this.value = BigInteger.valueOf(v);
+    }
+
+    @Override
+    void acceptUnsignedInteger(byte v) {
+        this.value = BigInteger.valueOf((long) (v & 0xff));
+    }
+
+    @Override
+    void acceptUnsignedInteger(short v) {
+        this.value = BigInteger.valueOf((long) (v & 0xffff));
+    }
+
+    @Override
+    void acceptUnsignedInteger(int v) {
+        if (v < 0) {
+            this.value = BigInteger.valueOf((long) (v & 0x7fffffff) + 0x80000000L);
+        } else {
+            this.value = BigInteger.valueOf((long) v);
+        }
+    }
+
+    @Override
+    void acceptUnsignedInteger(long v) {
+        if (v < 0L) {
+            this.value = BigInteger.valueOf(v + Long.MAX_VALUE + 1L).setBit(63);
+        } else {
+            this.value = BigInteger.valueOf(v);
+        }
+    }
+}