com.amazonaws.athena.connector.lambda.serde.ObjectMapperFactory Maven / Gradle / Ivy
package com.amazonaws.athena.connector.lambda.serde;
/*-
* #%L
* Amazon Athena Query Federation SDK
* %%
* Copyright (C) 2019 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%
*/
import com.amazonaws.athena.connector.lambda.data.Block;
import com.amazonaws.athena.connector.lambda.data.BlockAllocator;
import com.amazonaws.athena.connector.lambda.serde.v2.ObjectMapperFactoryV2;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import org.apache.arrow.vector.types.pojo.Schema;
/**
* Used to construct an ObjectMapper instead that is capable of handling some of our special objects (Apache Arrow Block,
* and Schema).
*
* @deprecated replaced with {@link ObjectMapperFactoryV2}
*/
@Deprecated
public class ObjectMapperFactory
{
private ObjectMapperFactory()
{
}
public static ObjectMapper create(BlockAllocator allocator)
{
ObjectMapper objectMapper = new ObjectMapper();
SimpleModule module = new SimpleModule();
module.addSerializer(Schema.class, new SchemaSerializer());
module.addDeserializer(Schema.class, new SchemaDeserializer());
module.addDeserializer(Block.class, new BlockDeserializer(allocator));
module.addSerializer(Block.class, new BlockSerializer());
//todo provide a block serializer instead of batch serializer but only serialize the batch not the schema.
objectMapper.registerModule(module)
.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)
.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
return objectMapper;
}
}