CollectionPackerTemplate.java

//
// 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.template;

import java.io.IOException;
import java.util.Collection;
import org.msgpack.packer.Packer;
import org.msgpack.MessageTypeException;

public class CollectionPackerTemplate<E> extends
		AbstractPackerTemplate<Collection<E>> {
	private PackerTemplate<E> elementPackerTemplate;

	public CollectionPackerTemplate(PackerTemplate<E> elementPackerTemplate) {
		this.elementPackerTemplate = elementPackerTemplate;
	}

	public void write(Packer pk, Collection<E> target, boolean required)
			throws IOException {
		if (target == null) {
			if (required) {
				throw new MessageTypeException("Attempted to write null");
			}
			pk.writeNil();
			return;
		}
		Collection<E> col = target;
		pk.writeArrayHeader(col.size());
		for (E e : col) {
			elementPackerTemplate.write(pk, e);
		}
	}
}