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The Athena Query Federation SDK defines a set of interfaces and wire protocols that you can implement to enable Athena to delegate portions of it's query execution plan to code that you deploy/write.

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/*-
 * #%L
 * Amazon Athena Query Federation SDK
 * %%
 * Copyright (C) 2019 - 2021 Amazon Web Services
 * %%
 * 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.
 * #L%
 */
package com.amazonaws.athena.connector.lambda.serde;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.SerializerProvider;

import java.io.IOException;

public interface VersionedSerDe
{
    interface Serializer
    {
        void doSerialize(T value, JsonGenerator jgen, SerializerProvider provider)
                throws IOException;

        void serialize(T value, JsonGenerator jgen, SerializerProvider provider)
                throws IOException;
    }

    interface Deserializer
    {
        T deserialize(JsonParser jparser, DeserializationContext ctxt)
                throws IOException;

        T doDeserialize(JsonParser jparser, DeserializationContext ctxt)
                throws IOException;
    }
}