MapSerializer.java

/*
 * Copyright 2016 The Lannister Project
 * 
 * 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 net.anyflow.lannister.serialization;

import java.io.IOException;
import java.util.stream.Collectors;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.SerializerProvider;

import net.anyflow.lannister.cluster.Map;

public final class MapSerializer<K, V> extends com.fasterxml.jackson.databind.JsonSerializer<Map<K, V>> {
	@Override
	public void serialize(Map<K, V> value, JsonGenerator gen, SerializerProvider serializers)
			throws IOException, JsonProcessingException {
		gen.writeObject(value.keySet().stream().map(key -> value.get(key)).collect(Collectors.toList()));
	}
}