java: edit MessagePack.java for TemplateProvider

java/src/main/java/org/msgpack/MessagePack.java

@@ -156,7 +156,17 @@ public class MessagePack {
 		//} else if(Collection.isAssignableFrom(target)) {
 		//} else if(BigInteger.isAssignableFrom(target)) {
 		} else {
-			tmpl = DynamicTemplate.create(target);
+			if (MessagePackTemplateProvider.class.isAssignableFrom(target)) {
+				try {
+					tmpl = ((MessagePackTemplateProvider) target.newInstance()).getTemplate();
+				} catch (InstantiationException e) {
+					throw new RuntimeException(e);
+				} catch (IllegalAccessException e) {
+					throw new RuntimeException(e);
+				}
+			} else {
+				tmpl = DynamicTemplate.create(target);
+			}
 		}
 
 		CustomPacker.register(target, tmpl);

java/src/main/java/org/msgpack/MessagePackTemplateProvider.java

@@ -0,0 +1,23 @@
+//
+// 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;
+
+public interface MessagePackTemplateProvider {
+
+	Template getTemplate();
+}