org.apache.pulsar.sql.presto.PulsarHandleResolver Maven / Gradle / Ivy

/**
 * 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 com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;
import io.prestosql.spi.connector.ColumnHandle;
import io.prestosql.spi.connector.ConnectorHandleResolver;
import io.prestosql.spi.connector.ConnectorSplit;
import io.prestosql.spi.connector.ConnectorTableHandle;
import io.prestosql.spi.connector.ConnectorTableLayoutHandle;
import io.prestosql.spi.connector.ConnectorTransactionHandle;

/**
 * This class helps to resolve classes for the Presto connector.
 */
public class PulsarHandleResolver implements ConnectorHandleResolver {
    @Override
    public Class getTableHandleClass() {
        return PulsarTableHandle.class;
    }

    @Override
    public Class getTableLayoutHandleClass() {
        return PulsarTableLayoutHandle.class;
    }

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

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

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

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

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

    static PulsarTableLayoutHandle convertLayout(ConnectorTableLayoutHandle layout) {
        requireNonNull(layout, "layout is null");
        checkArgument(layout instanceof PulsarTableLayoutHandle, "layout is not an instance of "
            + "PulsarTableLayoutHandle");
        return (PulsarTableLayoutHandle) layout;
    }

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