Package org.apache.druid.query

Class SegmentDescriptor

java.lang.Object

org.apache.druid.query.SegmentDescriptor

public class SegmentDescriptor
extends Object

This class is a pointer to a time range of a segment to be queried. The three pieces of this class (interval, version, and partition number) are typically passed to VersionedIntervalTimeline.findChunk(org.joda.time.Interval, VersionType, int) to retrieve an actual queryable object. Like SegmentId, instances of this class reference a segment. However, there are two major differences: 1) The getInterval() of this class may be narrower than the SegmentId.getInterval() of the segment being referenced. This happens when this class is being used to reference a specific time range of a segment, rather than the entire segment. 2) The SegmentId.getDataSource() field is absent from this class. Whenever this class is used, the datasource is known from some out-of-band information, such as the DataSource object of a query. Omitting the datasource, and abbreviating JSON field names, helps limit the serialized size of this class.

Constructor Summary

Constructors

Constructor	Description
SegmentDescriptor(org.joda.time.Interval interval, String version, int partitionNumber)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
org.joda.time.Interval	getInterval()
int	getPartitionNumber()
String	getVersion()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

SegmentDescriptor

public SegmentDescriptor(org.joda.time.Interval interval,
 String version,
 int partitionNumber)

Method Details

getInterval

public org.joda.time.Interval getInterval()

getVersion

public String getVersion()

getPartitionNumber

public int getPartitionNumber()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object