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

Class BlockSourceBzip2

java.lang.Object

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

All Implemented Interfaces:

org.aksw.commons.io.block.api.BlockSource

public class BlockSourceBzip2
extends Object
implements org.aksw.commons.io.block.api.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<org.aksw.commons.io.block.api.Block>>	blockContentCache
protected com.google.common.cache.LoadingCache<Long,org.aksw.commons.io.hadoop.binseach.bz2.BlockSourceBzip2.Neighbour>	blockTopologyCache
static Pattern	bwdMagicPattern
protected long	cachedBlockSize
protected long	cachedLastBlockSize
static String	COMPRESSED_MAGIC_STR
static Pattern	fwdMagicPattern
static 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 org.aksw.commons.io.seekable.api.SeekableSource	seekableSource
static long	UNKNOWN

Constructor Summary

Constructors

Constructor	Description
BlockSourceBzip2(org.aksw.commons.io.seekable.api.SeekableSource seekableSource, org.aksw.commons.io.deprecated.MatcherFactory fwdBlockStartMatcherFactory, org.aksw.commons.io.deprecated.MatcherFactory bwdBlockStartMatcherFactory)

Method Summary

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

Methods inherited from class java.lang.Object

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

Field Detail

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 org.aksw.commons.io.seekable.api.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<org.aksw.commons.io.block.api.Block>> blockContentCache

cachedBlockSize

protected long cachedBlockSize

cachedLastBlockSize

protected long cachedLastBlockSize

Constructor Detail

BlockSourceBzip2

public BlockSourceBzip2(org.aksw.commons.io.seekable.api.SeekableSource seekableSource,
                        org.aksw.commons.io.deprecated.MatcherFactory fwdBlockStartMatcherFactory,
                        org.aksw.commons.io.deprecated.MatcherFactory bwdBlockStartMatcherFactory)

Method Detail

create

public static org.aksw.commons.io.block.api.BlockSource create(org.aksw.commons.io.seekable.api.SeekableSource seekableSource)

loadBlock

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

Throws:

IOException

findBlockAtOrBeforeCached

public long findBlockAtOrBeforeCached(org.aksw.commons.io.seekable.api.Seekable seekable)
                               throws IOException

Throws:

IOException

findBlockAtOrBefore

public long findBlockAtOrBefore(org.aksw.commons.io.seekable.api.Seekable seekable)
                         throws IOException

Throws:

IOException

contentAtOrBefore

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

Specified by:

contentAtOrBefore in interface org.aksw.commons.io.block.api.BlockSource

Throws:

IOException

findBlockAtOrAfterCached

public long findBlockAtOrAfterCached(org.aksw.commons.io.seekable.api.Seekable seekable)
                              throws IOException

Throws:

IOException

findBlockAtOrAfter

public long findBlockAtOrAfter(org.aksw.commons.io.seekable.api.Seekable seekable)
                        throws IOException

Throws:

IOException

contentAtOrAfter

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

Specified by:

contentAtOrAfter in interface org.aksw.commons.io.block.api.BlockSource

Throws:

IOException

hasBlockAfter

public boolean hasBlockAfter(long pos)
                      throws IOException

Specified by:

hasBlockAfter in interface org.aksw.commons.io.block.api.BlockSource

Throws:

IOException

hasBlockBefore

public boolean hasBlockBefore(long pos)
                       throws IOException

Specified by:

hasBlockBefore in interface org.aksw.commons.io.block.api.BlockSource

Throws:

IOException

size

public long size()
          throws IOException

Specified by:

size in interface org.aksw.commons.io.block.api.BlockSource

Throws:

IOException

cache

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

Throws:

IOException

getSizeOfBlock

public long getSizeOfBlock(long pos)
                    throws IOException

Specified by:

getSizeOfBlock in interface org.aksw.commons.io.block.api.BlockSource

Throws:

IOException

getSizeOfBlockCached

public long getSizeOfBlockCached(long pos)
                          throws IOException

Throws:

IOException

loadBlock

protected long loadBlock(long pos)
                  throws IOException

Throws:

IOException