io.prestosql.operator.aggregation.multimapagg.MultimapAggregationStateFactory Maven / Gradle / Ivy

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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.prestosql.operator.aggregation.multimapagg;

import io.prestosql.spi.function.AccumulatorStateFactory;
import io.prestosql.spi.type.Type;

import static java.util.Objects.requireNonNull;

public class MultimapAggregationStateFactory
        implements AccumulatorStateFactory
{
    private final Type keyType;
    private final Type valueType;

    public MultimapAggregationStateFactory(Type keyType, Type valueType)
    {
        this.keyType = requireNonNull(keyType);
        this.valueType = requireNonNull(valueType);
    }

    @Override
    public MultimapAggregationState createSingleState()
    {
        return new SingleMultimapAggregationState(keyType, valueType);
    }

    @Override
    public Class getSingleStateClass()
    {
        return SingleMultimapAggregationState.class;
    }

    @Override
    public MultimapAggregationState createGroupedState()
    {
        return new GroupedMultimapAggregationState(keyType, valueType);
    }

    @Override
    public Class getGroupedStateClass()
    {
        return GroupedMultimapAggregationState.class;
    }
}