org.apache.hudi.io.hfile

Class HFileRootIndexBlock

java.lang.Object

org.apache.hudi.io.hfile.HFileBlock

org.apache.hudi.io.hfile.HFileIndexBlock

org.apache.hudi.io.hfile.HFileRootIndexBlock

public class HFileRootIndexBlock
extends HFileIndexBlock

Represents a HFileBlockType.ROOT_INDEX block.

Field Summary

Fields inherited from class org.apache.hudi.io.hfile.HFileIndexBlock

blockDataSize, entries

Fields inherited from class org.apache.hudi.io.hfile.HFileBlock

byteBuff, bytesPerChecksum, compressedByteBuff, context, HFILEBLOCK_HEADER_SIZE, HFILEBLOCK_HEADER_SIZE_NO_CHECKSUM, onDiskSizeWithoutHeader, sizeCheckSum, startOffsetInBuff, startOffsetInCompressedBuff, uncompressedEndOffset, uncompressedSizeWithoutHeader

Constructor Summary

Constructors

Constructor and Description
HFileRootIndexBlock(HFileContext context, byte[] byteBuff, int startOffsetInBuff)

Method Summary

Modifier and Type	Method and Description
static HFileRootIndexBlock	createRootIndexBlockToWrite(HFileContext context)
ByteBuffer	getUncompressedBlockDataToWrite() Returns serialized "data" part of the block.
TreeMap<Key,BlockIndexEntry>	readBlockIndex(int numEntries, boolean contentKeyOnly) Reads the index block and returns the block index entry to an in-memory TreeMap for searches.
List<BlockIndexEntry>	readBlockIndexEntry(int numEntries, boolean contentKeyOnly) Returns the block index entries contained in the root index block.

Methods inherited from class org.apache.hudi.io.hfile.HFileIndexBlock

add, getNumOfEntries, isEmpty

Methods inherited from class org.apache.hudi.io.hfile.HFileBlock

allocateBufferForUnpacking, getBlockType, getByteBuff, getOnDiskSizeWithHeader, getStartOffsetInBuffForWrite, parse, serialize, setStartOffsetInBuffForWrite, unpack

Methods inherited from class java.lang.Object

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

Constructor Detail

HFileRootIndexBlock

public HFileRootIndexBlock(HFileContext context,
                           byte[] byteBuff,
                           int startOffsetInBuff)

Method Detail

createRootIndexBlockToWrite

public static HFileRootIndexBlock createRootIndexBlockToWrite(HFileContext context)

readBlockIndex

public TreeMap<Key,BlockIndexEntry> readBlockIndex(int numEntries,
                                                   boolean contentKeyOnly)

Reads the index block and returns the block index entry to an in-memory TreeMap for searches.

Parameters:

numEntries - the number of entries in the block

contentKeyOnly - whether the key part contains content only

Returns:

a TreeMap of block index entries

readBlockIndexEntry

public List<BlockIndexEntry> readBlockIndexEntry(int numEntries,
                                                 boolean contentKeyOnly)

Returns the block index entries contained in the root index block.

Parameters:

numEntries - the number of entries in the block

contentKeyOnly - whether the key part contains content only

Returns:

a List of block index entries

getUncompressedBlockDataToWrite

public ByteBuffer getUncompressedBlockDataToWrite()
                                           throws IOException

Description copied from class: HFileBlock

Returns serialized "data" part of the block. This function must be implemented by each block type separately.

Specified by:

getUncompressedBlockDataToWrite in class HFileBlock

Throws:

IOException