io.prestosql.plugin.kafka.KafkaHandleResolver Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of presto-kafka Show documentation
Presto - Kafka Connector
There is a newer version: 350
/*
 * 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.
 */
package io.prestosql.plugin.kafka;

import io.prestosql.spi.connector.ColumnHandle;
import io.prestosql.spi.connector.ConnectorHandleResolver;
import io.prestosql.spi.connector.ConnectorInsertTableHandle;
import io.prestosql.spi.connector.ConnectorSplit;
import io.prestosql.spi.connector.ConnectorTableHandle;
import io.prestosql.spi.connector.ConnectorTransactionHandle;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;

public class KafkaHandleResolver
        implements ConnectorHandleResolver
{
    @Override
    public Class getTableHandleClass()
    {
        return KafkaTableHandle.class;
    }

    @Override
    public Class getColumnHandleClass()
    {
        return KafkaColumnHandle.class;
    }

    @Override
    public Class getInsertTableHandleClass()
    {
        return KafkaTableHandle.class;
    }

    @Override
    public Class getSplitClass()
    {
        return KafkaSplit.class;
    }

    @Override
    public Class getTransactionHandleClass()
    {
        return KafkaTransactionHandle.class;
    }

    static KafkaTableHandle convertTableHandle(ConnectorTableHandle tableHandle)
    {
        requireNonNull(tableHandle, "tableHandle is null");
        checkArgument(tableHandle instanceof KafkaTableHandle, "tableHandle is not an instance of KafkaTableHandle");
        return (KafkaTableHandle) tableHandle;
    }

    static KafkaColumnHandle convertColumnHandle(ColumnHandle columnHandle)
    {
        requireNonNull(columnHandle, "columnHandle is null");
        checkArgument(columnHandle instanceof KafkaColumnHandle, "columnHandle is not an instance of KafkaColumnHandle");
        return (KafkaColumnHandle) columnHandle;
    }

    static KafkaSplit convertSplit(ConnectorSplit split)
    {
        requireNonNull(split, "split is null");
        checkArgument(split instanceof KafkaSplit, "split is not an instance of KafkaSplit");
        return (KafkaSplit) split;
    }
}