EntityIdSerializer.java

/*
 * Copyright 2021 Global Crop Diversity Trust
 *
 * 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.genesys.blocks.util;

import java.io.IOException;

import org.genesys.blocks.model.EntityId;

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

/**
 * Serializes {@link EntityId} types only by their `getId()`.
 */
public class EntityIdSerializer extends JsonSerializer<EntityId> {

	@Override
	public void serialize(EntityId value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
		if (value == null) {
			gen.writeNull();
		} else {
			gen.writeNumber(value.getId());
		}
	}

}