Package org.apache.druid.frame.processor

Class FrameProcessors

java.lang.Object

org.apache.druid.frame.processor.FrameProcessors

public class FrameProcessors
extends Object

Method Summary

Modifier and Type	Method	Description
static void	closeAll(List<ReadableFrameChannel> readableFrameChannels, List<WritableFrameChannel> writableFrameChannels, Closeable... otherCloseables)	Helper method for implementing FrameProcessor.cleanup().
static FrameCursor	makeCursor(Frame frame, FrameReader frameReader)	Returns a FrameCursor for the provided Frame, allowing both sequential and random access.
static FrameCursor	makeCursor(Frame frame, FrameReader frameReader, VirtualColumns virtualColumns)	Returns a FrameCursor for the provided Frame and VirtualColumns, allowing both sequential and random access.
static it.unimi.dsi.fastutil.ints.IntSortedSet	rangeSet(int size)	Creates a mutable sorted set from 0 to "size" (exclusive).
static int	selectRandom(it.unimi.dsi.fastutil.ints.IntSet ints)	Selects a random element from a set of ints.
static <T> FrameProcessor<T>	withBaggage(FrameProcessor<T> processor, Closeable baggage)

Methods inherited from class java.lang.Object

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

Method Detail

withBaggage

public static <T> FrameProcessor<T> withBaggage(FrameProcessor<T> processor,
                                                Closeable baggage)

makeCursor

public static FrameCursor makeCursor(Frame frame,
                                     FrameReader frameReader)

Returns a FrameCursor for the provided Frame, allowing both sequential and random access.

makeCursor

public static FrameCursor makeCursor(Frame frame,
                                     FrameReader frameReader,
                                     VirtualColumns virtualColumns)

Returns a FrameCursor for the provided Frame and VirtualColumns, allowing both sequential and random access.

rangeSet

public static it.unimi.dsi.fastutil.ints.IntSortedSet rangeSet(int size)

Creates a mutable sorted set from 0 to "size" (exclusive).

Throws:

IllegalArgumentException - if size is negative

selectRandom

public static int selectRandom(it.unimi.dsi.fastutil.ints.IntSet ints)

Selects a random element from a set of ints.

closeAll

public static void closeAll(List<ReadableFrameChannel> readableFrameChannels,
                            List<WritableFrameChannel> writableFrameChannels,
                            Closeable... otherCloseables)
                     throws IOException

Helper method for implementing FrameProcessor.cleanup(). The objects are closed in the order provided.

Throws:

IOException