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Trino - Delta Lake connector
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/*
 * 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.trino.plugin.deltalake;

import com.google.common.collect.ImmutableList;
import io.trino.plugin.deltalake.transactionlog.DeltaLakeSchemaSupport.ColumnMappingMode;
import io.trino.plugin.deltalake.transactionlog.ProtocolEntry;
import io.trino.spi.connector.ConnectorOutputTableHandle;

import java.util.List;
import java.util.Optional;
import java.util.OptionalInt;
import java.util.OptionalLong;

import static com.google.common.collect.ImmutableList.toImmutableList;
import static io.trino.plugin.deltalake.DeltaLakeColumnType.PARTITION_KEY;
import static java.util.Objects.requireNonNull;

public record DeltaLakeOutputTableHandle(
        String schemaName,
        String tableName,
        List inputColumns,
        String location,
        Optional checkpointInterval,
        boolean external,
        Optional comment,
        Optional changeDataFeedEnabled,
        String schemaString,
        ColumnMappingMode columnMappingMode,
        OptionalInt maxColumnId,
        boolean replace,
        OptionalLong readVersion,
        ProtocolEntry protocolEntry)
        implements ConnectorOutputTableHandle
{
    public DeltaLakeOutputTableHandle
    {
        requireNonNull(schemaName, "schemaName is null");
        requireNonNull(tableName, "tableName is null");
        inputColumns = ImmutableList.copyOf(requireNonNull(inputColumns, "inputColumns is null"));
        requireNonNull(location, "location is null");
        requireNonNull(checkpointInterval, "checkpointInterval is null");
        requireNonNull(comment, "comment is null");
        requireNonNull(changeDataFeedEnabled, "changeDataFeedEnabled is null");
        requireNonNull(schemaString, "schemaString is null");
        requireNonNull(columnMappingMode, "columnMappingMode is null");
        requireNonNull(maxColumnId, "maxColumnId is null");
        requireNonNull(readVersion, "readVersion is null");
        requireNonNull(protocolEntry, "protocolEntry is null");
    }

    public List partitionedBy()
    {
        return inputColumns().stream()
                .filter(column -> column.getColumnType() == PARTITION_KEY)
                .map(DeltaLakeColumnHandle::getColumnName)
                .collect(toImmutableList());
    }
}