Class BlockSourceBzip2

java.lang.Object

org.aksw.commons.io.hadoop.binseach.bz2.BlockSourceBzip2

All Implemented Interfaces:

BlockSource

public class BlockSourceBzip2
extends Object
implements BlockSource

Field Summary

Fields

Modifier and Type	Field	Description
static long	ABSENT
protected com.google.common.cache.Cache<Long, org.aksw.commons.util.ref.Ref<Block>>	blockContentCache
protected com.google.common.cache.LoadingCache<Long, org.aksw.commons.io.hadoop.binseach.bz2.BlockSourceBzip2.Neighbour>	blockTopologyCache
static final Pattern	bwdMagicPattern
protected long	cachedBlockSize
protected long	cachedLastBlockSize
static final String	COMPRESSED_MAGIC_STR
static final Pattern	fwdMagicPattern
static final int	MAX_SEARCH_RANGE	The maximum number of bytes that may be scanned in order to find a block start Bzip blocks are typically 900K uncompressed; unfortunately the CBZip2InputStream API does not give access to the actual block size used.
protected SeekableSource	seekableSource
static long	UNKNOWN

Constructor Summary

Constructors

Constructor	Description
BlockSourceBzip2(SeekableSource seekableSource, MatcherFactory fwdBlockStartMatcherFactory, MatcherFactory bwdBlockStartMatcherFactory)

Method Summary

Modifier and Type	Method	Description
org.aksw.commons.util.ref.Ref<Block>	cache(long blockStart, Seekable seekable)
org.aksw.commons.util.ref.Ref<Block>	contentAtOrAfter(long requestPos, boolean inclusive)
org.aksw.commons.util.ref.Ref<Block>	contentAtOrBefore(long requestPos, boolean inclusive)
static BlockSource	create(SeekableSource seekableSource)
long	findBlockAtOrAfter(Seekable seekable)
long	findBlockAtOrAfterCached(Seekable seekable)
long	findBlockAtOrBefore(Seekable seekable)
long	findBlockAtOrBeforeCached(Seekable seekable)
long	getSizeOfBlock(long pos)
long	getSizeOfBlockCached(long pos)
boolean	hasBlockAfter(long pos)
boolean	hasBlockBefore(long pos)
protected long	loadBlock(long pos)
protected org.aksw.commons.util.ref.Ref<Block>	loadBlock(Seekable seekable)
long	size()

Methods inherited from class Object

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

Field Details

COMPRESSED_MAGIC_STR

public static final String COMPRESSED_MAGIC_STR

See Also:

• Constant Field Values

fwdMagicPattern

public static final Pattern fwdMagicPattern

bwdMagicPattern

public static final Pattern bwdMagicPattern

MAX_SEARCH_RANGE

public static final int MAX_SEARCH_RANGE

The maximum number of bytes that may be scanned in order to find a block start Bzip blocks are typically 900K uncompressed; unfortunately the CBZip2InputStream API does not give access to the actual block size used.

See Also:

• Constant Field Values

seekableSource

protected SeekableSource seekableSource

ABSENT

public static long ABSENT

UNKNOWN

public static long UNKNOWN

blockTopologyCache

protected com.google.common.cache.LoadingCache<Long, org.aksw.commons.io.hadoop.binseach.bz2.BlockSourceBzip2.Neighbour> blockTopologyCache

blockContentCache

protected com.google.common.cache.Cache<Long, org.aksw.commons.util.ref.Ref<Block>> blockContentCache

cachedBlockSize

protected long cachedBlockSize

cachedLastBlockSize

protected long cachedLastBlockSize

Constructor Details

BlockSourceBzip2

public BlockSourceBzip2(SeekableSource seekableSource,
 MatcherFactory fwdBlockStartMatcherFactory,
 MatcherFactory bwdBlockStartMatcherFactory)

Method Details

create

public static BlockSource create(SeekableSource seekableSource)

loadBlock

protected org.aksw.commons.util.ref.Ref<Block> loadBlock(Seekable seekable)
                                                  throws IOException

Throws:

IOException

findBlockAtOrBeforeCached

public long findBlockAtOrBeforeCached(Seekable seekable)
                               throws IOException

Throws:

IOException

findBlockAtOrBefore

public long findBlockAtOrBefore(Seekable seekable)
                         throws IOException

Throws:

IOException

contentAtOrBefore

public org.aksw.commons.util.ref.Ref<Block> contentAtOrBefore(long requestPos,
 boolean inclusive)
                                                       throws IOException

Specified by:

contentAtOrBefore in interface BlockSource

Throws:

IOException

findBlockAtOrAfterCached

public long findBlockAtOrAfterCached(Seekable seekable)
                              throws IOException

Throws:

IOException

findBlockAtOrAfter

public long findBlockAtOrAfter(Seekable seekable)
                        throws IOException

Throws:

IOException

contentAtOrAfter

public org.aksw.commons.util.ref.Ref<Block> contentAtOrAfter(long requestPos,
 boolean inclusive)
                                                      throws IOException

Specified by:

contentAtOrAfter in interface BlockSource

Throws:

IOException

hasBlockAfter

public boolean hasBlockAfter(long pos)
                      throws IOException

Specified by:

hasBlockAfter in interface BlockSource

Throws:

IOException

hasBlockBefore

public boolean hasBlockBefore(long pos)
                       throws IOException

Specified by:

hasBlockBefore in interface BlockSource

Throws:

IOException

size

public long size()
          throws IOException

Specified by:

size in interface BlockSource

Throws:

IOException

cache

public org.aksw.commons.util.ref.Ref<Block> cache(long blockStart,
 Seekable seekable)
                                           throws IOException

Throws:

IOException

getSizeOfBlock

public long getSizeOfBlock(long pos)
                    throws IOException

Specified by:

getSizeOfBlock in interface BlockSource

Throws:

IOException

getSizeOfBlockCached

public long getSizeOfBlockCached(long pos)
                          throws IOException

Throws:

IOException

loadBlock

protected long loadBlock(long pos)
                  throws IOException

Throws:

IOException