org.apache.druid.java.util.common

Class JodaUtils

java.lang.Object

org.apache.druid.java.util.common.JodaUtils

public class JodaUtils
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static long	MAX_INSTANT
static long	MIN_INSTANT

Constructor Summary

Constructors

Constructor and Description
JodaUtils()

Method Summary

Modifier and Type	Method and Description
static Iterator<org.joda.time.Interval>	condensedIntervalsIterator(Iterator<org.joda.time.Interval> sortedIntervals) Condense the provided intervals such that the returned list has no abutting intervals, no overlapping intervals, and no zero-length intervals.
static List<org.joda.time.Interval>	condenseIntervals(Iterable<org.joda.time.Interval> intervals) Condense the provided intervals such that the returned list has no abutting intervals, no overlapping intervals, and no zero-length intervals.
static org.joda.time.DateTime	maxDateTime(org.joda.time.DateTime... times)
static org.joda.time.DateTime	minDateTime(org.joda.time.DateTime... times)
static org.joda.time.Interval	umbrellaInterval(Iterable<org.joda.time.Interval> intervals)

Methods inherited from class java.lang.Object

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

Field Detail

MAX_INSTANT

public static final long MAX_INSTANT

See Also:

Constant Field Values

MIN_INSTANT

public static final long MIN_INSTANT

See Also:

Constant Field Values

Constructor Detail

JodaUtils

public JodaUtils()

Method Detail

condenseIntervals

public static List<org.joda.time.Interval> condenseIntervals(Iterable<org.joda.time.Interval> intervals)

Condense the provided intervals such that the returned list has no abutting intervals, no overlapping intervals, and no zero-length intervals.

This method is most efficient if the input intervals are in a SortedSet whose comparator is Comparators.intervalsByStartThenEnd().

Parameters:

intervals - The Iterable object containing the intervals to condense

Returns:

The condensed intervals

condensedIntervalsIterator

public static Iterator<org.joda.time.Interval> condensedIntervalsIterator(Iterator<org.joda.time.Interval> sortedIntervals)

Condense the provided intervals such that the returned list has no abutting intervals, no overlapping intervals, and no zero-length intervals.

The provided intervals must be sorted in ascending order using Comparators.intervalsByStartThenEnd(). Otherwise, results are undefined.

The method avoids materialization by incrementally condensing the intervals by starting from the first and looking for "adjacent" intervals. This is possible since intervals in the Iterator are in ascending order (as guaranteed by the caller).

Parameters:

sortedIntervals - The iterator object containing the intervals to condense

Returns:

An iterator for the condensed intervals. By construction the condensed intervals are sorted in ascending order and contain no repeated elements. The iterator can contain nulls, they will be skipped if it does.

Throws:

IAE - if an element is null or if sortedIntervals is not sorted in ascending order

umbrellaInterval

public static org.joda.time.Interval umbrellaInterval(Iterable<org.joda.time.Interval> intervals)

minDateTime

public static org.joda.time.DateTime minDateTime(org.joda.time.DateTime... times)

maxDateTime

public static org.joda.time.DateTime maxDateTime(org.joda.time.DateTime... times)