org.apache.hadoop.hbase.codec.prefixtree
Class PrefixTreeCodec

java.lang.Object
  org.apache.hadoop.hbase.codec.prefixtree.PrefixTreeCodec

All Implemented Interfaces:

DataBlockEncoder

@InterfaceAudience.Private
public class PrefixTreeCodec
extends Object
implements DataBlockEncoder

This class is created via reflection in DataBlockEncoding enum. Update the enum if class name or package changes.

PrefixTreeDataBlockEncoder implementation of DataBlockEncoder. This is the primary entry point for PrefixTree encoding and decoding. Encoding is delegated to instances of PrefixTreeEncoder, and decoding is delegated to instances of CellSearcher. Encoder and decoder instances are created and recycled by static PtEncoderFactory and PtDecoderFactory.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.io.encoding.DataBlockEncoder

DataBlockEncoder.EncodedSeeker

Constructor Summary

PrefixTreeCodec()
no-arg constructor for reflection

Method Summary

DataBlockEncoder.EncodedSeeker	createSeeker(KeyValue.KVComparator comparator, HFileBlockDecodingContext decodingCtx) Is this the correct handling of an illegal comparator? How to prevent that from getting all the way to this point.
ByteBuffer	decodeKeyValues(DataInputStream source, HFileBlockDecodingContext decodingCtx)
ByteBuffer	decodeKeyValues(DataInputStream source, int allocateHeaderLength, int skipLastBytes, HFileBlockDecodingContext decodingCtx) I don't think this method is called during normal HBase operation, so efficiency is not important.
void	encodeKeyValues(ByteBuffer in, HFileBlockEncodingContext blkEncodingCtx) Copied from BufferedDataBlockEncoder.
ByteBuffer	getFirstKeyInBlock(ByteBuffer block)
HFileBlockDecodingContext	newDataBlockDecodingContext(HFileContext meta)
HFileBlockEncodingContext	newDataBlockEncodingContext(DataBlockEncoding encoding, byte[] header, HFileContext meta)

Methods inherited from class java.lang.Object

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

Constructor Detail

PrefixTreeCodec

public PrefixTreeCodec()

no-arg constructor for reflection

Method Detail

encodeKeyValues

public void encodeKeyValues(ByteBuffer in,
                            HFileBlockEncodingContext blkEncodingCtx)
                     throws IOException

Copied from BufferedDataBlockEncoder. Almost definitely can be improved, but i'm not familiar enough with the concept of the HFileBlockEncodingContext.

Specified by:

encodeKeyValues in interface DataBlockEncoder

Throws:

IOException

decodeKeyValues

public ByteBuffer decodeKeyValues(DataInputStream source,
                                  HFileBlockDecodingContext decodingCtx)
                           throws IOException

Specified by:

decodeKeyValues in interface DataBlockEncoder

Throws:

IOException

decodeKeyValues

public ByteBuffer decodeKeyValues(DataInputStream source,
                                  int allocateHeaderLength,
                                  int skipLastBytes,
                                  HFileBlockDecodingContext decodingCtx)
                           throws IOException

I don't think this method is called during normal HBase operation, so efficiency is not important.

Throws:

IOException

getFirstKeyInBlock

public ByteBuffer getFirstKeyInBlock(ByteBuffer block)

Specified by:

getFirstKeyInBlock in interface DataBlockEncoder

newDataBlockEncodingContext

public HFileBlockEncodingContext newDataBlockEncodingContext(DataBlockEncoding encoding,
                                                             byte[] header,
                                                             HFileContext meta)

Specified by:

newDataBlockEncodingContext in interface DataBlockEncoder

newDataBlockDecodingContext

public HFileBlockDecodingContext newDataBlockDecodingContext(HFileContext meta)

Specified by:

newDataBlockDecodingContext in interface DataBlockEncoder

createSeeker

public DataBlockEncoder.EncodedSeeker createSeeker(KeyValue.KVComparator comparator,
                                                   HFileBlockDecodingContext decodingCtx)

Is this the correct handling of an illegal comparator? How to prevent that from getting all the way to this point.

Specified by:

createSeeker in interface DataBlockEncoder