com.amazonaws.athena.connector.lambda.serde.SchemaSerializer 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.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
import org.apache.arrow.vector.types.pojo.Schema;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
* Used to enhance Jackson's stock ObjectMapper with the ability to serialize Apache Arrow Schema objects.
*
* @deprecated {@link com.amazonaws.athena.connector.lambda.serde.v3.SchemaSerDeV3} should be used instead
*/
@Deprecated
public class SchemaSerializer
extends StdSerializer
{
public static final String SCHEMA_FIELD_NAME = "schema";
private final com.amazonaws.athena.connector.lambda.data.SchemaSerDe serDe = new com.amazonaws.athena.connector.lambda.data.SchemaSerDe();
public SchemaSerializer()
{
super(Schema.class);
}
@Override
public void serialize(Schema schema, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
throws IOException
{
jsonGenerator.writeStartObject();
ByteArrayOutputStream out = new ByteArrayOutputStream();
serDe.serialize(schema, out);
jsonGenerator.writeBinaryField(SCHEMA_FIELD_NAME, out.toByteArray());
jsonGenerator.writeEndObject();
}
}