java: adds ByteBufferTemplate

java/src/main/java/org/msgpack/template/ByteBufferTemplate.java

@@ -0,0 +1,60 @@
+//
+// MessagePack for Java
+//
+// Copyright (C) 2009-2010 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.template;
+
+import java.nio.ByteBuffer;
+import java.io.IOException;
+import org.msgpack.*;
+
+public class ByteBufferTemplate implements Template {
+	private ByteBufferTemplate() { }
+
+	public void pack(Packer pk, Object target) throws IOException {
+		byte[] bytes = byteBufferToByteArray((ByteBuffer)target);
+		pk.packByteArray(bytes);
+	}
+
+	private static byte[] byteBufferToByteArray(ByteBuffer b) {
+		if (b.hasArray() && b.position() == 0 && b.arrayOffset() == 0
+				&& b.remaining() == b.capacity()) {
+			return b.array();
+		} else {
+			int size = b.remaining();
+			byte[] bytes = new byte[size];
+			System.arraycopy(b.array(), b.arrayOffset() + b.position(), bytes, 0, size);
+			return bytes;
+		}
+	}
+
+	public Object unpack(Unpacker pac) throws IOException, MessageTypeException {
+		byte[] bytes = pac.unpackByteArray();
+		return ByteBuffer.wrap(bytes);
+	}
+
+	public Object convert(MessagePackObject from) throws MessageTypeException {
+		byte[] bytes = from.asByteArray();
+		return ByteBuffer.wrap(bytes);
+	}
+
+	static public ByteBufferTemplate getInstance() {
+		return instance;
+	}
+
+	static final ByteBufferTemplate instance = new ByteBufferTemplate();
+}
+