com.metamx.druid.DurationGranularity.java Source code

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Here is the source code for com.metamx.druid.DurationGranularity.java

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/*
 * Druid - a distributed column store.
 * Copyright (C) 2012  Metamarkets Group Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package com.metamx.druid;

import com.google.common.primitives.Longs;
import org.codehaus.jackson.annotate.JsonCreator;
import org.codehaus.jackson.annotate.JsonProperty;
import org.joda.time.DateTime;

import java.nio.ByteBuffer;

public class DurationGranularity extends BaseQueryGranularity {
    private final long length;
    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 millis, long origin) {
        this.length = millis;
        this.origin = origin % length;
    }

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

    @JsonProperty("origin")
    public DateTime getOrigin() {
        return new DateTime(origin);
    }

    public long getOriginMillis() {
        return origin;
    }

    @Override
    public long next(long t) {
        return t + getDurationMillis();
    }

    @Override
    public long truncate(long t) {
        final long duration = getDurationMillis();
        return t - t % duration + origin;
    }

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

    public long getDurationMillis() {
        return length;
    }

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

        DurationGranularity that = (DurationGranularity) o;

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

        return true;
    }

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

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