io.druid.segment

Class CompressedVSizeIndexedV3Supplier

java.lang.Object

io.druid.segment.CompressedVSizeIndexedV3Supplier

All Implemented Interfaces:

com.google.common.base.Supplier<IndexedMultivalue<IndexedInts>>, WritableSupplier<IndexedMultivalue<IndexedInts>>

public class CompressedVSizeIndexedV3Supplier
extends Object
implements WritableSupplier<IndexedMultivalue<IndexedInts>>

The format is mostly the same with CompressedVSizeIndexedSupplier(which has version 0x2, so we call it V2), the only difference is V3's offsets is not VSize encoded, it's just compressed. The reason we provide this is we can streams the data out in the binary format with CompressedVSizeIndexedV3Writer. If we want to streams VSizeInts, we must know the max value in the value sets. It's easy to know the max id of values(like dimension cardinality while encoding dimension), but difficult to known the max id of offsets.

Field Summary

Fields

Modifier and Type	Field and Description
static byte	VERSION

Method Summary

Modifier and Type	Method and Description
static CompressedVSizeIndexedV3Supplier	fromByteBuffer(ByteBuffer buffer, ByteOrder order, SmooshedFileMapper fileMapper)
static CompressedVSizeIndexedV3Supplier	fromIterable(Iterable<IndexedInts> objectsIterable, int offsetChunkFactor, int maxValue, ByteOrder byteOrder, CompressedObjectStrategy.CompressionStrategy compression)
IndexedMultivalue<IndexedInts>	get()
long	getSerializedSize()
void	writeToChannel(WritableByteChannel channel)

Methods inherited from class java.lang.Object

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

Field Detail

VERSION

public static final byte VERSION

See Also:

Constant Field Values

Method Detail

fromByteBuffer

public static CompressedVSizeIndexedV3Supplier fromByteBuffer(ByteBuffer buffer,
                                                              ByteOrder order,
                                                              SmooshedFileMapper fileMapper)

fromIterable

public static CompressedVSizeIndexedV3Supplier fromIterable(Iterable<IndexedInts> objectsIterable,
                                                            int offsetChunkFactor,
                                                            int maxValue,
                                                            ByteOrder byteOrder,
                                                            CompressedObjectStrategy.CompressionStrategy compression)

getSerializedSize

public long getSerializedSize()

Specified by:

getSerializedSize in interface WritableSupplier<IndexedMultivalue<IndexedInts>>

writeToChannel

public void writeToChannel(WritableByteChannel channel)
                    throws IOException

Specified by:

writeToChannel in interface WritableSupplier<IndexedMultivalue<IndexedInts>>

Throws:

IOException

get

public IndexedMultivalue<IndexedInts> get()

Specified by:

get in interface com.google.common.base.Supplier<IndexedMultivalue<IndexedInts>>