io.starter.formats.LEO

Class BlockByteReader

java.lang.Object

io.starter.formats.LEO.BlockByteReader

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

Storage

public class BlockByteReader
extends Object
implements Serializable

Provide a translation layer between the block vector and a byte array. A record (Storage, XLSRecord) can retrieve bytes from Scattered blocks transparently. The BlockByteReader Allocates a ByteBuffer containing only byte references contained within Blocs assigned to the implementation class. A Class using this reader will either subclass the reader and manage its blocks, or interact with a shared reader. In the case of a shared reader,

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BlockByteReader()
	BlockByteReader(List blokz, int len)

Method Summary

Modifier and Type	Method and Description
static ByteBuffer	allocate(int arg0)
static ByteBuffer	allocateDirect(int arg0)
byte[]	array()
int	arrayOffset()
CharBuffer	asCharBuffer()
DoubleBuffer	asDoubleBuffer()
FloatBuffer	asFloatBuffer()
IntBuffer	asIntBuffer()
LongBuffer	asLongBuffer()
ByteBuffer	asReadOnlyBuffer()
ShortBuffer	asShortBuffer()
int	capacity()
Buffer	clear()
ByteBuffer	compact()
ByteBuffer	duplicate()
boolean	equals(Object arg0)
Buffer	flip()
byte	get()
byte	get(BlockByteConsumer rec, int startpos)
byte[]	get(BlockByteConsumer rec, int startpos, int len)
ByteBuffer	get(byte[] arg0)
ByteBuffer	get(byte[] arg0, int arg1, int arg2)
boolean	getApplyRelativePosition()
ByteBuffer	getBackingByteBuffer()
List	getBlockmap() For whatever reason, get the blockmap
char	getChar()
char	getChar(int arg0)
double	getDouble()
double	getDouble(int arg0)
int[]	getFileOffsets(int start, int size) Gets the mapping from stream offsets to file offsets over the given range.
String	getFileOffsetString(int start, int size)
float	getFloat()
float	getFloat(int arg0)
byte[]	getHeaderBytes(int startpos) Allows for getting of header bytes without setting blocks on a rec
int	getInt()
int	getInt(int arg0)
int	getLength()
long	getLong()
long	getLong(int arg0)
int[]	getReadPositions(int startpos, int len) Gets the list of blocks needed to read the given sequence.
static int[]	getReadPositions(int startpos, int len, boolean BIGBLOCKSTORAGE) returns the lengths of the two byte
short	getShort()
short	getShort(int arg0)
boolean	hasArray()
int	hashCode()
boolean	hasRemaining()
boolean	isDirect()
boolean	isReadOnly()
int	limit()
Buffer	limit(int arg0)
Buffer	mark()
ByteOrder	order()
ByteBuffer	order(ByteOrder arg0)
int	position()
Buffer	position(int arg0)
ByteBuffer	put(byte arg0)
ByteBuffer	put(byte[] arg0)
ByteBuffer	put(byte[] arg0, int arg1, int arg2)
ByteBuffer	put(ByteBuffer arg0)
ByteBuffer	put(int arg0, byte arg1)
ByteBuffer	putChar(char arg0)
ByteBuffer	putChar(int arg0, char arg1)
ByteBuffer	putDouble(double arg0)
ByteBuffer	putDouble(int arg0, double arg1)
ByteBuffer	putFloat(float arg0)
ByteBuffer	putFloat(int arg0, float arg1)
ByteBuffer	putInt(int arg0)
ByteBuffer	putInt(int arg0, int arg1)
ByteBuffer	putLong(int arg0, long arg1)
ByteBuffer	putLong(long arg0)
ByteBuffer	putShort(int arg0, short arg1)
ByteBuffer	putShort(short arg0)
int	remaining()
Buffer	reset()
Buffer	rewind()
void	setApplyRelativePosition(boolean b) Only add the offset when we are fetching data from 'within' a record, ie: rkdata.get(i) as opposed to when we are traversing the entire collection of bytes as in WorkBookFactory.parse()...
void	setBackingByteBuffer(ByteBuffer buffer)
void	setBlockmap(AbstractList list) Set the map of Blocks contained in this reader
void	setLength(int i)
ByteBuffer	slice()
String	toString()
static ByteBuffer	wrap(byte[] arg0)
static ByteBuffer	wrap(byte[] arg0, int arg1, int arg2)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

BlockByteReader

protected BlockByteReader()

BlockByteReader

public BlockByteReader(List blokz,
                       int len)

Method Detail

isReadOnly

public boolean isReadOnly()

getHeaderBytes

public byte[] getHeaderBytes(int startpos)

Allows for getting of header bytes without setting blocks on a rec

Parameters:

startpos -

Returns:

get

public byte get(BlockByteConsumer rec,
                int startpos)

get

public byte[] get(BlockByteConsumer rec,
                  int startpos,
                  int len)

getReadPositions

public static int[] getReadPositions(int startpos,
                                     int len,
                                     boolean BIGBLOCKSTORAGE)

returns the lengths of the two byte

 ie: start 10 len 8
 blk0 = 10-18
 0,10,18
 
 ie: start 514 len 1
 blk1 = 2-3
 1,2,3
 
 ie: start 480 len 1124
 
  blk0 = 480-512
  blk1 = 512-1024
  blk2 = 1024-1536
  blk3 = 1536-1604
 
 [0, 480, 512,1, 0, 512, 2, 0, 512, 3, 0, 68]
 
 8139, 693
 

Parameters:

startpos -

Returns:

getReadPositions

public int[] getReadPositions(int startpos,
                              int len)

Gets the list of blocks needed to read the given sequence.

getFileOffsets

public int[] getFileOffsets(int start,
                            int size)

Gets the mapping from stream offsets to file offsets over the given range. This returns an array of integers arranged in pairs. The first value of each pair is an offset from start and the second is the corresponding offset in the source file.

getFileOffsetString

public String getFileOffsetString(int start,
                                  int size)

getBlockmap

public List getBlockmap()

For whatever reason, get the blockmap

Returns:

the map of blocks

setBlockmap

public void setBlockmap(AbstractList list)

Set the map of Blocks contained in this reader

Parameters:

list - the map of blocks

getLength

public int getLength()

Returns:

setLength

public void setLength(int i)

Parameters:

i -

allocate

public static ByteBuffer allocate(int arg0)

Parameters:

arg0 -

Returns:

allocateDirect

public static ByteBuffer allocateDirect(int arg0)

Parameters:

arg0 -

Returns:

wrap

public static final ByteBuffer wrap(byte[] arg0)

Parameters:

arg0 -

Returns:

wrap

public static final ByteBuffer wrap(byte[] arg0,
                                    int arg1,
                                    int arg2)

Parameters:

arg0 -

arg1 -

arg2 -

Returns:

array

public byte[] array()

Returns:

arrayOffset

public int arrayOffset()

Returns:

asCharBuffer

public CharBuffer asCharBuffer()

Returns:

asDoubleBuffer

public DoubleBuffer asDoubleBuffer()

Returns:

asFloatBuffer

public FloatBuffer asFloatBuffer()

Returns:

asIntBuffer

public IntBuffer asIntBuffer()

Returns:

asLongBuffer

public LongBuffer asLongBuffer()

Returns:

asReadOnlyBuffer

public ByteBuffer asReadOnlyBuffer()

Returns:

asShortBuffer

public ShortBuffer asShortBuffer()

Returns:

capacity

public int capacity()

Returns:

clear

public Buffer clear()

Returns:

compact

public ByteBuffer compact()

Returns:

duplicate

public ByteBuffer duplicate()

Returns:

equals

public boolean equals(Object arg0)

Overrides:

equals in class Object

flip

public Buffer flip()

Returns:

get

public byte get()

Returns:

get

public ByteBuffer get(byte[] arg0)

Parameters:

arg0 -

Returns:

get

public ByteBuffer get(byte[] arg0,
                      int arg1,
                      int arg2)

Parameters:

arg0 -

arg1 -

arg2 -

Returns:

getChar

public char getChar()

Returns:

getChar

public char getChar(int arg0)

Parameters:

arg0 -

Returns:

getDouble

public double getDouble()

Returns:

getDouble

public double getDouble(int arg0)

Parameters:

arg0 -

Returns:

getFloat

public float getFloat()

Returns:

getFloat

public float getFloat(int arg0)

Parameters:

arg0 -

Returns:

getInt

public int getInt()

Returns:

getInt

public int getInt(int arg0)

Parameters:

arg0 -

Returns:

getLong

public long getLong()

Returns:

getLong

public long getLong(int arg0)

Parameters:

arg0 -

Returns:

getShort

public short getShort()

Returns:

getShort

public short getShort(int arg0)

Parameters:

arg0 -

Returns:

hasArray

public boolean hasArray()

Returns:

hashCode

public int hashCode()

Overrides:

hashCode in class Object

hasRemaining

public boolean hasRemaining()

Returns:

isDirect

public boolean isDirect()

Returns:

limit

public int limit()

Returns:

limit

public Buffer limit(int arg0)

Parameters:

arg0 -

Returns:

mark

public Buffer mark()

Returns:

order

public ByteOrder order()

Returns:

order

public ByteBuffer order(ByteOrder arg0)

Parameters:

arg0 -

Returns:

position

public int position()

Returns:

position

public Buffer position(int arg0)

Parameters:

arg0 -

Returns:

put

public ByteBuffer put(byte arg0)

Parameters:

arg0 -

Returns:

put

public ByteBuffer put(byte[] arg0)

Parameters:

arg0 -

Returns:

put

public ByteBuffer put(byte[] arg0,
                      int arg1,
                      int arg2)

Parameters:

arg0 -

arg1 -

arg2 -

Returns:

put

public ByteBuffer put(int arg0,
                      byte arg1)

Parameters:

arg0 -

arg1 -

Returns:

put

public ByteBuffer put(ByteBuffer arg0)

Parameters:

arg0 -

Returns:

putChar

public ByteBuffer putChar(char arg0)

Parameters:

arg0 -

Returns:

putChar

public ByteBuffer putChar(int arg0,
                          char arg1)

Parameters:

arg0 -

arg1 -

Returns:

putDouble

public ByteBuffer putDouble(double arg0)

Parameters:

arg0 -

Returns:

putDouble

public ByteBuffer putDouble(int arg0,
                            double arg1)

Parameters:

arg0 -

arg1 -

Returns:

putFloat

public ByteBuffer putFloat(float arg0)

Parameters:

arg0 -

Returns:

putFloat

public ByteBuffer putFloat(int arg0,
                           float arg1)

Parameters:

arg0 -

arg1 -

Returns:

putInt

public ByteBuffer putInt(int arg0)

Parameters:

arg0 -

Returns:

putInt

public ByteBuffer putInt(int arg0,
                         int arg1)

Parameters:

arg0 -

arg1 -

Returns:

putLong

public ByteBuffer putLong(int arg0,
                          long arg1)

Parameters:

arg0 -

arg1 -

Returns:

putLong

public ByteBuffer putLong(long arg0)

Parameters:

arg0 -

Returns:

putShort

public ByteBuffer putShort(int arg0,
                           short arg1)

Parameters:

arg0 -

arg1 -

Returns:

putShort

public ByteBuffer putShort(short arg0)

Parameters:

arg0 -

Returns:

remaining

public int remaining()

Returns:

reset

public Buffer reset()

Returns:

rewind

public Buffer rewind()

Returns:

slice

public ByteBuffer slice()

Returns:

toString

public String toString()

Overrides:

toString in class Object

getBackingByteBuffer

public ByteBuffer getBackingByteBuffer()

Returns:

setBackingByteBuffer

public void setBackingByteBuffer(ByteBuffer buffer)

Parameters:

buffer -

getApplyRelativePosition

public boolean getApplyRelativePosition()

Returns:

setApplyRelativePosition

public void setApplyRelativePosition(boolean b)

Only add the offset when we are fetching data from 'within' a record, ie: rkdata.get(i) as opposed to when we are traversing the entire collection of bytes as in WorkBookFactory.parse()... * @param b