com.palantir.atlasdb.keyvalue.cassandra.sweep.CellWithTimestamps Maven / Gradle / Ivy

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/*
 * (c) Copyright 2018 Palantir Technologies Inc. All rights reserved.
 *
 * 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 com.palantir.atlasdb.keyvalue.cassandra.sweep;

import com.palantir.atlasdb.keyvalue.api.CandidateCellForSweeping;
import com.palantir.atlasdb.keyvalue.api.Cell;
import com.palantir.atlasdb.keyvalue.api.ImmutableCandidateCellForSweeping;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import org.immutables.value.Value;

@Value.Immutable
public interface CellWithTimestamps {

    Cell cell();

    List sortedTimestamps();

    static CellWithTimestamps of(Cell cell, List unsortedTimestamps) {
        List sortedTimestamps = new ArrayList<>(unsortedTimestamps);
        Collections.sort(sortedTimestamps);
        return ImmutableCellWithTimestamps.builder()
                .cell(cell)
                .sortedTimestamps(sortedTimestamps)
                .build();
    }

    default CandidateCellForSweeping toSweepCandidate(
            Predicate shouldSweepTimestampPredicate, boolean latestValueEmpty) {
        List filteredTimestamps = sortedTimestamps().stream()
                .filter(shouldSweepTimestampPredicate)
                .collect(Collectors.toList());
        return ImmutableCandidateCellForSweeping.builder()
                .cell(cell())
                .sortedTimestamps(filteredTimestamps)
                .isLatestValueEmpty(latestValueEmpty)
                .build();
    }
}