org.apache.druid.segment.indexing.granularity.ArbitraryGranularitySpec.java Source code

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/*
 * 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.druid.segment.indexing.granularity;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterators;
import com.google.common.collect.Lists;
import com.google.common.collect.PeekingIterator;
import com.google.common.collect.Sets;
import org.apache.druid.java.util.common.DateTimes;
import org.apache.druid.java.util.common.IAE;
import org.apache.druid.java.util.common.granularity.Granularities;
import org.apache.druid.java.util.common.granularity.Granularity;
import org.apache.druid.java.util.common.guava.Comparators;
import org.joda.time.DateTime;
import org.joda.time.Interval;

import java.util.List;
import java.util.SortedSet;
import java.util.TreeSet;

public class ArbitraryGranularitySpec implements GranularitySpec {
    private final TreeSet<Interval> intervals;
    private final Granularity queryGranularity;
    private final Boolean rollup;

    @JsonCreator
    public ArbitraryGranularitySpec(@JsonProperty("queryGranularity") Granularity queryGranularity,
            @JsonProperty("rollup") Boolean rollup, @JsonProperty("intervals") List<Interval> inputIntervals) {
        this.queryGranularity = queryGranularity == null ? Granularities.NONE : queryGranularity;
        this.rollup = rollup == null ? Boolean.TRUE : rollup;
        this.intervals = Sets.newTreeSet(Comparators.intervalsByStartThenEnd());

        if (inputIntervals == null) {
            inputIntervals = Lists.newArrayList();
        }

        // Insert all intervals
        for (final Interval inputInterval : inputIntervals) {
            intervals.add(inputInterval);
        }

        // Ensure intervals are non-overlapping (but they may abut each other)
        final PeekingIterator<Interval> intervalIterator = Iterators.peekingIterator(intervals.iterator());
        while (intervalIterator.hasNext()) {
            final Interval currentInterval = intervalIterator.next();

            if (intervalIterator.hasNext()) {
                final Interval nextInterval = intervalIterator.peek();
                if (currentInterval.overlaps(nextInterval)) {
                    throw new IAE("Overlapping intervals: %s, %s", currentInterval, nextInterval);
                }
            }
        }
    }

    public ArbitraryGranularitySpec(Granularity queryGranularity, List<Interval> inputIntervals) {
        this(queryGranularity, true, inputIntervals);
    }

    @Override
    @JsonProperty("intervals")
    public Optional<SortedSet<Interval>> bucketIntervals() {
        return Optional.of(intervals);
    }

    @Override
    public List<Interval> inputIntervals() {
        return ImmutableList.copyOf(intervals);
    }

    @Override
    public Optional<Interval> bucketInterval(DateTime dt) {
        // First interval with start time  dt
        final Interval interval = intervals.floor(new Interval(dt, DateTimes.MAX));

        if (interval != null && interval.contains(dt)) {
            return Optional.of(interval);
        } else {
            return Optional.absent();
        }
    }

    @Override
    public Granularity getSegmentGranularity() {
        throw new UnsupportedOperationException();
    }

    @Override
    @JsonProperty("rollup")
    public boolean isRollup() {
        return rollup;
    }

    @Override
    @JsonProperty("queryGranularity")
    public Granularity getQueryGranularity() {
        return queryGranularity;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        ArbitraryGranularitySpec that = (ArbitraryGranularitySpec) o;

        if (!intervals.equals(that.intervals)) {
            return false;
        }
        if (!rollup.equals(that.rollup)) {
            return false;
        }

        return !(queryGranularity != null ? !queryGranularity.equals(that.queryGranularity)
                : that.queryGranularity != null);

    }

    @Override
    public int hashCode() {
        int result = intervals.hashCode();
        result = 31 * result + rollup.hashCode();
        result = 31 * result + (queryGranularity != null ? queryGranularity.hashCode() : 0);
        return result;
    }

    @Override
    public String toString() {
        return "ArbitraryGranularitySpec{" + "intervals=" + intervals + ", queryGranularity=" + queryGranularity
                + ", rollup=" + rollup + '}';
    }

    @Override
    public GranularitySpec withIntervals(List<Interval> inputIntervals) {
        return new ArbitraryGranularitySpec(queryGranularity, rollup, inputIntervals);
    }
}