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Pulsar SQL - Pulsar Presto Connector
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.pulsar.sql.presto;
import static java.lang.String.format;
import com.google.inject.Inject;
import io.airlift.log.Logger;
import io.trino.decoder.DecoderColumnHandle;
import io.trino.spi.connector.ColumnMetadata;
import io.trino.spi.type.TypeManager;
import java.util.List;
import java.util.Set;
import org.apache.pulsar.common.naming.TopicName;
import org.apache.pulsar.common.schema.SchemaInfo;
import org.apache.pulsar.common.schema.SchemaType;
import org.apache.pulsar.sql.presto.decoder.avro.PulsarAvroRowDecoderFactory;
import org.apache.pulsar.sql.presto.decoder.json.PulsarJsonRowDecoderFactory;
import org.apache.pulsar.sql.presto.decoder.primitive.PulsarPrimitiveRowDecoderFactory;
import org.apache.pulsar.sql.presto.decoder.protobufnative.PulsarProtobufNativeRowDecoderFactory;
/**
* dispatcher RowDecoderFactory for {@link org.apache.pulsar.common.schema.SchemaType}.
*/
public class PulsarDispatchingRowDecoderFactory {
private static final Logger log = Logger.get(PulsarDispatchingRowDecoderFactory.class);
private TypeManager typeManager;
@Inject
public PulsarDispatchingRowDecoderFactory(TypeManager typeManager) {
this.typeManager = typeManager;
}
public PulsarRowDecoder createRowDecoder(TopicName topicName, SchemaInfo schemaInfo,
Set columns) {
PulsarRowDecoderFactory rowDecoderFactory = createDecoderFactory(schemaInfo);
return rowDecoderFactory.createRowDecoder(topicName, schemaInfo, columns);
}
public List extractColumnMetadata(TopicName topicName, SchemaInfo schemaInfo,
PulsarColumnHandle.HandleKeyValueType handleKeyValueType) {
PulsarRowDecoderFactory rowDecoderFactory = createDecoderFactory(schemaInfo);
return rowDecoderFactory.extractColumnMetadata(topicName, schemaInfo, handleKeyValueType);
}
private PulsarRowDecoderFactory createDecoderFactory(SchemaInfo schemaInfo) {
if (SchemaType.AVRO.equals(schemaInfo.getType())) {
return new PulsarAvroRowDecoderFactory(typeManager);
} else if (SchemaType.JSON.equals(schemaInfo.getType())) {
return new PulsarJsonRowDecoderFactory(typeManager);
} else if (SchemaType.PROTOBUF_NATIVE.equals(schemaInfo.getType())) {
return new PulsarProtobufNativeRowDecoderFactory(typeManager);
} else if (schemaInfo.getType().isPrimitive()) {
return new PulsarPrimitiveRowDecoderFactory();
} else {
throw new RuntimeException(format("'%s' is unsupported type '%s'", schemaInfo.getName(),
schemaInfo.getType()));
}
}
public TypeManager getTypeManager() {
return typeManager;
}
}