io.trino.plugin.hive.aws.athena.projection.IntegerProjection Maven / Gradle / Ivy

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This is a Databricks build of Trino's Hive plugin which includes support for HTTP based transport for it's Hive metastore thrift interface.

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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.hive.aws.athena.projection;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableList.Builder;
import io.trino.spi.predicate.Domain;
import io.trino.spi.type.BigintType;
import io.trino.spi.type.IntegerType;
import io.trino.spi.type.Type;
import io.trino.spi.type.VarcharType;

import java.util.List;
import java.util.Optional;

import static io.airlift.slice.Slices.utf8Slice;
import static io.trino.spi.predicate.Domain.singleValue;
import static java.util.Objects.requireNonNull;

public class IntegerProjection
        extends Projection
{
    private final int leftBound;
    private final int rightBound;
    private final int interval;
    private final Optional digits;

    public IntegerProjection(String columnName, int leftBound, int rightBound, int interval, Optional digits)
    {
        super(columnName);
        this.leftBound = leftBound;
        this.rightBound = rightBound;
        this.interval = interval;
        this.digits = requireNonNull(digits, "digits is null");
    }

    @Override
    public List getProjectedValues(Optional partitionValueFilter)
    {
        Builder builder = ImmutableList.builder();
        int current = leftBound;
        while (current <= rightBound) {
            int currentValue = current;
            String currentValueFormatted = digits
                    .map(digits -> String.format("%0" + digits + "d", currentValue))
                    .orElseGet(() -> Integer.toString(currentValue));
            if (isValueInDomain(partitionValueFilter, current, currentValueFormatted)) {
                builder.add(currentValueFormatted);
            }
            current += interval;
        }
        return builder.build();
    }

    private boolean isValueInDomain(Optional valueDomain, int value, String formattedValue)
    {
        if (valueDomain.isEmpty() || valueDomain.get().isAll()) {
            return true;
        }
        Domain domain = valueDomain.get();
        Type type = domain.getType();
        if (type instanceof VarcharType) {
            return domain.contains(singleValue(type, utf8Slice(formattedValue)));
        }
        if (type instanceof IntegerType || type instanceof BigintType) {
            return domain.contains(singleValue(type, Long.valueOf(value)));
        }
        throw unsupportedProjectionColumnTypeException(type);
    }
}