io.druid.granularity.DurationGranularity.java Source code

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Here is the source code for io.druid.granularity.DurationGranularity.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.granularity;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.primitives.Longs;
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(final long t) {
        final long duration = getDurationMillis();
        long offset = t % duration - origin % duration;
        if (offset < 0) {
            offset += duration;
        }
        return t - offset;
    }

    @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 + '}';
    }
}