diff --git a/java/src/main/java/org/msgpack/annotation/Ignore.java b/java/src/main/java/org/msgpack/annotation/Ignore.java
new file mode 100644
index 0000000..dfe9f7e
--- /dev/null
+++ b/java/src/main/java/org/msgpack/annotation/Ignore.java
@@ -0,0 +1,28 @@
+//
+// 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.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.FIELD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Ignore {
+}
diff --git a/java/src/main/java/org/msgpack/annotation/Index.java b/java/src/main/java/org/msgpack/annotation/Index.java
new file mode 100644
index 0000000..b567012
--- /dev/null
+++ b/java/src/main/java/org/msgpack/annotation/Index.java
@@ -0,0 +1,29 @@
+//
+// 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.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.FIELD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Index {
+	int value();
+}
diff --git a/java/src/main/java/org/msgpack/annotation/Required.java b/java/src/main/java/org/msgpack/annotation/Required.java
new file mode 100644
index 0000000..00d4ecb
--- /dev/null
+++ b/java/src/main/java/org/msgpack/annotation/Required.java
@@ -0,0 +1,28 @@
+//
+// 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.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.FIELD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Required {
+}
diff --git a/java/src/main/java/org/msgpack/template/FieldList.java b/java/src/main/java/org/msgpack/template/FieldList.java
new file mode 100644
index 0000000..8d6f28f
--- /dev/null
+++ b/java/src/main/java/org/msgpack/template/FieldList.java
@@ -0,0 +1,96 @@
+//
+// 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.util.List;
+import java.util.ArrayList;
+
+public class FieldList {
+	public static class Entry {
+		public Entry() {
+			this.name = null;
+			this.option = null;
+		}
+
+		public Entry(String name, FieldOption option) {
+			this.name = name;
+			this.option = option;
+		}
+
+		private String name;
+		private FieldOption option;
+
+		public String getName() {
+			return name;
+		}
+
+		public FieldOption getOption() {
+			return option;
+		}
+
+		boolean isAvailable() {
+			return this.name != null;
+		}
+
+		boolean isRequired() {
+			return this.option == FieldOption.REQUIRED;
+		}
+
+		boolean isOptional() {
+			return this.option == FieldOption.OPTIONAL;
+		}
+
+		boolean isNullable() {
+			return this.option == FieldOption.NULLABLE;
+		}
+	}
+
+	private ArrayList<Entry> list;
+
+	public FieldList() {
+		list = new ArrayList<Entry>();
+	}
+
+	public void add(final String name) {
+		add(name, FieldOption.REQUIRED);
+	}
+
+	public void add(final String name, final FieldOption option) {
+		list.add(new Entry(name, option));
+	}
+
+	public void put(int index, final String name) {
+		put(index, name, FieldOption.REQUIRED);
+	}
+
+	public void put(int index, final String name, final FieldOption option) {
+		if(list.size() < index) {
+			do {
+				list.add(new Entry());
+			} while(list.size() < index);
+			list.add(new Entry(name, option));
+		} else {
+			list.set(index, new Entry(name, option));
+		}
+	}
+
+	List<Entry> getList() {
+		return list;
+	}
+}
+
diff --git a/java/src/main/java/org/msgpack/template/FieldOption.java b/java/src/main/java/org/msgpack/template/FieldOption.java
new file mode 100644
index 0000000..41f152f
--- /dev/null
+++ b/java/src/main/java/org/msgpack/template/FieldOption.java
@@ -0,0 +1,27 @@
+//
+// 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;
+
+public enum FieldOption {
+	IGNORE,
+	REQUIRED,
+	OPTIONAL,
+	NULLABLE,
+	DEFAULT;
+}
+