io.druid.segment.indexing.granularity.ArbitraryGranularitySpec.java Source code

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Here is the source code for io.druid.segment.indexing.granularity.ArbitraryGranularitySpec.java

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group Inc.
 *
 * 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.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.Iterators;
import com.google.common.collect.Lists;
import com.google.common.collect.PeekingIterator;
import com.google.common.collect.Sets;
import com.metamx.common.Granularity;
import com.metamx.common.guava.Comparators;
import io.druid.common.utils.JodaUtils;
import io.druid.granularity.QueryGranularity;
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 QueryGranularity queryGranularity;

    @JsonCreator
    public ArbitraryGranularitySpec(@JsonProperty("queryGranularity") QueryGranularity queryGranularity,
            @JsonProperty("intervals") List<Interval> inputIntervals) {
        this.queryGranularity = queryGranularity;
        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 IllegalArgumentException(
                            String.format("Overlapping intervals: %s, %s", currentInterval, nextInterval));
                }
            }
        }
    }

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

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

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

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

    @Override
    @JsonProperty("queryGranularity")
    public QueryGranularity 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;
        }
        return !(queryGranularity != null ? !queryGranularity.equals(that.queryGranularity)
                : that.queryGranularity != null);

    }

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