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add implicit Successible and Predecessible for Timestamp #530

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Jul 4, 2014
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add implicit Successible and Predecessible for Timestamp #530

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2ef8cf8
add implicit Successible and Predecessible for Timestamp
tsdeng Jul 3, 2014
1e9a317
add boundary checking, fix import
tsdeng Jul 3, 2014
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13 changes: 11 additions & 2 deletions summingbird-batch/src/main/scala/com/twitter/summingbird/batch/TimeStamp.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ limitations under the License.

package com.twitter.summingbird.batch

import com.twitter.algebird.Monoid
import com.twitter.algebird.{ Monoid, Predecessible, Successible }
import com.twitter.bijection.Bijection
import java.util.Date
import com.twitter.scalding.RichDate
Expand Down Expand Up @@ -53,4 +53,13 @@ object Timestamp {
implicit val timestamp2Long: Bijection[Timestamp, Long] =
Bijection.build[Timestamp, Long] { _.milliSinceEpoch } { Timestamp(_) }

}
implicit val timestampSuccessible: Successible[Timestamp] = new Successible[Timestamp] {
def next(old: Timestamp) = if (old.milliSinceEpoch != Long.MaxValue) Some(old.next) else None
def ordering: Ordering[Timestamp] = Timestamp.orderingOnTimestamp
}

implicit val timestampPredecessible: Predecessible[Timestamp] = new Predecessible[Timestamp] {
def prev(old: Timestamp) = if (old.milliSinceEpoch != Long.MinValue) Some(old.prev) else None
def ordering: Ordering[Timestamp] = Timestamp.orderingOnTimestamp
}
}