org.apache.druid.segment

Class QueryableIndexSegment

java.lang.Object

org.apache.druid.segment.QueryableIndexSegment

All Implemented Interfaces:

Closeable, AutoCloseable, Segment

public class QueryableIndexSegment
extends Object
implements Segment

Constructor Summary

Constructors

Constructor and Description
QueryableIndexSegment(QueryableIndex index, SegmentId segmentId)

Method Summary

Modifier and Type	Method and Description
<T> T	as(Class<T> clazz) Request an implementation of a particular interface.
QueryableIndex	asQueryableIndex()
StorageAdapter	asStorageAdapter()
void	close()
org.joda.time.Interval	getDataInterval()
SegmentId	getId()

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryableIndexSegment

public QueryableIndexSegment(QueryableIndex index,
                             SegmentId segmentId)

Method Detail

getId

public SegmentId getId()

Specified by:

getId in interface Segment

getDataInterval

public org.joda.time.Interval getDataInterval()

Specified by:

getDataInterval in interface Segment

asQueryableIndex

public QueryableIndex asQueryableIndex()

Specified by:

asQueryableIndex in interface Segment

asStorageAdapter

public StorageAdapter asStorageAdapter()

Specified by:

asStorageAdapter in interface Segment

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

as

@Nullable
public <T> T as(@Nonnull
                          Class<T> clazz)

Description copied from interface: Segment

Request an implementation of a particular interface. If the passed-in interface is QueryableIndex or StorageAdapter, then this method behaves identically to Segment.asQueryableIndex() or Segment.asStorageAdapter(). Other interfaces are only expected to be requested by callers that have specific knowledge of extra features provided by specific segment types. For example, an extension might provide a custom Segment type that can offer both StorageAdapter and some new interface. That extension can also offer a Query that uses that new interface. Implementations which accept classes other than QueryableIndex or StorageAdapter are limited to using those classes within the extension. This means that one extension cannot rely on the `Segment.as` behavior of another extension.

Specified by:

as in interface Segment

Type Parameters:

T - desired interface

Parameters:

clazz - desired interface

Returns:

instance of clazz, or null if the interface is not supported by this segment