com.amazonaws.athena.connector.lambda.serde.v4.GetDataSourceCapabilitiesResponseSerDeV4 Maven / Gradle / Ivy

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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 - 2022 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.
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package com.amazonaws.athena.connector.lambda.serde.v4;

import com.amazonaws.athena.connector.lambda.metadata.GetDataSourceCapabilitiesResponse;
import com.amazonaws.athena.connector.lambda.metadata.optimizations.OptimizationSubType;
import com.amazonaws.athena.connector.lambda.request.FederationResponse;
import com.amazonaws.athena.connector.lambda.serde.TypedDeserializer;
import com.amazonaws.athena.connector.lambda.serde.TypedSerializer;
import com.amazonaws.athena.connector.lambda.serde.VersionedSerDe;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;

import java.io.IOException;
import java.util.List;
import java.util.Map;

public class GetDataSourceCapabilitiesResponseSerDeV4
{
    private static final String CATALOG_NAME_FIELD = "catalogName";
    private static final String CAPABILITIES_NAME_FIELD = "capabilities";

    private GetDataSourceCapabilitiesResponseSerDeV4() {}

    public static final class Serializer extends TypedSerializer implements VersionedSerDe.Serializer
    {
        private final VersionedSerDe.Serializer optimizationSubTypeSerializer;

        public Serializer(VersionedSerDe.Serializer optimizationSubTypeSerializer)
        {
            super(FederationResponse.class, GetDataSourceCapabilitiesResponse.class);
            this.optimizationSubTypeSerializer = optimizationSubTypeSerializer;
        }

        @Override
        protected void doTypedSerialize(FederationResponse federationResponse, JsonGenerator jgen, SerializerProvider provider)
                throws IOException
        {
            GetDataSourceCapabilitiesResponse getDataSourceCapabilitiesResponse = (GetDataSourceCapabilitiesResponse) federationResponse;

            jgen.writeStringField(CATALOG_NAME_FIELD, getDataSourceCapabilitiesResponse.getCatalogName());

            jgen.writeObjectFieldStart(CAPABILITIES_NAME_FIELD);
            for (Map.Entry> entry : getDataSourceCapabilitiesResponse.getCapabilities().entrySet()) {
                jgen.writeArrayFieldStart(entry.getKey());
                for (OptimizationSubType optimizationSubType : entry.getValue()) {
                    optimizationSubTypeSerializer.serialize(optimizationSubType, jgen, provider);
                }
                jgen.writeEndArray();
            }
            jgen.writeEndObject();
        }
    }

    public static final class Deserializer extends TypedDeserializer implements VersionedSerDe.Deserializer
    {
        private final VersionedSerDe.Deserializer optimizationSubTypeDeserializer;

        public Deserializer(VersionedSerDe.Deserializer optimizationSubTypeDeserializer)
        {
            super(FederationResponse.class, GetDataSourceCapabilitiesResponse.class);
            this.optimizationSubTypeDeserializer = optimizationSubTypeDeserializer;
        }

        @Override
        protected FederationResponse doTypedDeserialize(JsonParser jparser, DeserializationContext ctxt)
                throws IOException
        {
            String catalogName = getNextStringField(jparser, CATALOG_NAME_FIELD);

            assertFieldName(jparser, CAPABILITIES_NAME_FIELD);
            jparser.nextToken();

            ImmutableMap.Builder> capabilities = ImmutableMap.builder();
            while (jparser.nextToken() != JsonToken.END_OBJECT) {
                String field = jparser.getCurrentName();
                jparser.nextToken();
                ImmutableList.Builder optimizationSubType = ImmutableList.builder();
                while (jparser.nextToken() != JsonToken.END_ARRAY) {
                    validateObjectStart(jparser.getCurrentToken());
                    optimizationSubType.add(optimizationSubTypeDeserializer.doDeserialize(jparser, ctxt));
                    validateObjectEnd(jparser);
                }
                capabilities.put(field, optimizationSubType.build());
            }

            return new GetDataSourceCapabilitiesResponse(catalogName, capabilities.build());
        }
    }
}