io.druid.java.util.common.granularity.DurationGranularity.java Source code

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Here is the source code for io.druid.java.util.common.granularity.DurationGranularity.java

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.java.util.common.granularity;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Preconditions;
import com.google.common.primitives.Longs;
import io.druid.java.util.common.DateTimes;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormatter;

import java.nio.ByteBuffer;

/**
 * DurationGranularity buckets data based on the length of a duration
 */
public class DurationGranularity extends Granularity {
    private final long duration;
    private final long origin;

    @JsonCreator
    public DurationGranularity(@JsonProperty("duration") long duration, @JsonProperty("origin") DateTime origin) {
        this(duration, origin == null ? 0 : origin.getMillis());
    }

    public DurationGranularity(long duration, long origin) {
        Preconditions.checkArgument(duration > 0, "duration should be greater than 0!");
        this.duration = duration;
        this.origin = origin % duration;
    }

    @JsonProperty("duration")
    public long getDuration() {
        return duration;
    }

    @JsonProperty("origin")
    public DateTime getOrigin() {
        return DateTimes.utc(origin);
    }

    public long getOriginMillis() {
        return origin;
    }

    @Override
    public DateTimeFormatter getFormatter(Formatter type) {
        throw new UnsupportedOperationException("This method should not be invoked for this granularity type");
    }

    @Override
    public DateTime increment(DateTime time) {
        return time.plus(getDuration());
    }

    @Override
    public DateTime decrement(DateTime time) {
        return time.minus(getDuration());
    }

    @Override
    public DateTime bucketStart(DateTime time) {
        long t = time.getMillis();
        final long duration = getDurationMillis();
        long offset = t % duration - origin;
        if (offset < 0) {
            offset += duration;
        }
        return new DateTime(t - offset, time.getChronology());
    }

    @Override
    public DateTime toDate(String filePath, Formatter formatter) {
        throw new UnsupportedOperationException("This method should not be invoked for this granularity type");
    }

    @Override
    public byte[] getCacheKey() {
        return ByteBuffer.allocate(2 * Longs.BYTES).putLong(duration).putLong(origin).array();
    }

    public long getDurationMillis() {
        return duration;
    }

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

        DurationGranularity that = (DurationGranularity) o;

        if (duration != that.duration) {
            return false;
        }
        if (origin != that.origin) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = (int) (duration ^ (duration >>> 32));
        result = 31 * result + (int) (origin ^ (origin >>> 32));
        return result;
    }

    @Override
    public String toString() {
        return "DurationGranularity{" + "duration=" + duration + ", origin=" + origin + '}';
    }
}