org.apache.druid.segment.indexing.granularity

Class BaseGranularitySpec.LookupIntervalBuckets

java.lang.Object

org.apache.druid.segment.indexing.granularity.BaseGranularitySpec.LookupIntervalBuckets

Enclosing class:

BaseGranularitySpec

protected static class BaseGranularitySpec.LookupIntervalBuckets
extends Object

This is a helper class to facilitate sharing the code for sortedBucketIntervals among the various GranularitySpec implementations. In particular, the UniformGranularitySpec needs to avoid materializing the intervals when the need to traverse them arises.

Constructor Summary

Constructors

Constructor and Description
LookupIntervalBuckets(Iterable<org.joda.time.Interval> intervalIterable)

Method Summary

Modifier and Type	Method and Description
com.google.common.base.Optional<org.joda.time.Interval>	bucketInterval(org.joda.time.DateTime dt) Returns a bucket interval using a fast lookup into an efficient data structure where all the intervals have been materialized
Iterator<org.joda.time.Interval>	iterator()
TreeSet<org.joda.time.Interval>	materializedIntervals() Helper method to avoid collecting the intervals from the iterator

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LookupIntervalBuckets

public LookupIntervalBuckets(Iterable<org.joda.time.Interval> intervalIterable)

Parameters:

intervalIterable - The intervals to materialize

Method Detail

bucketInterval

public com.google.common.base.Optional<org.joda.time.Interval> bucketInterval(org.joda.time.DateTime dt)

Returns a bucket interval using a fast lookup into an efficient data structure where all the intervals have been materialized

Parameters:

dt - The date time to lookup

Returns:

An Optional containing the interval for the given DateTime if it exists

iterator

public Iterator<org.joda.time.Interval> iterator()

Returns:

An iterator to traverse the materialized intervals. The traversal will be done in order as dictated by Comparators.intervalsByStartThenEnd()

materializedIntervals

public TreeSet<org.joda.time.Interval> materializedIntervals()

Helper method to avoid collecting the intervals from the iterator

Returns:

The TreeSet of materialized intervals