diff --git a/java/src/main/java/org/msgpack/template/NullableTemplate.java b/java/src/main/java/org/msgpack/template/NullableTemplate.java new file mode 100644 index 00000000..d34d36e2 --- /dev/null +++ b/java/src/main/java/org/msgpack/template/NullableTemplate.java @@ -0,0 +1,56 @@ +// +// 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.io.IOException; +import org.msgpack.*; + +public class NullableTemplate implements Template { + private Template elementTemplate; + + public NullableTemplate(Template elementTemplate) { + this.elementTemplate = elementTemplate; + } + + public Template getElementTemplate() { + return elementTemplate; + } + + public void pack(Packer pk, Object target) throws IOException { + if(target == null) { + pk.packNil(); + } else { + elementTemplate.pack(pk, target); + } + } + + public Object unpack(Unpacker pac) throws IOException, MessageTypeException { + if(pac.tryUnpackNull()) { + return null; + } + return elementTemplate.unpack(pac); + } + + public Object convert(MessagePackObject from) throws MessageTypeException { + if(from.isNil()) { + return null; + } + return elementTemplate.convert(from); + } +} +