com.googlecode.javaewah32
Class IteratingBufferedRunningLengthWord32

java.lang.Object
  com.googlecode.javaewah32.IteratingBufferedRunningLengthWord32

public final class IteratingBufferedRunningLengthWord32
extends Object

Mostly for internal use. Similar to BufferedRunningLengthWord32, but automatically advances to the next BufferedRunningLengthWord32 as words are discarded.

Since:

0.5.0

Author:

Daniel Lemire and David McIntosh

Constructor Summary

IteratingBufferedRunningLengthWord32(EWAHCompressedBitmap32 bitmap)
Instantiates a new iterating buffered running length word.

IteratingBufferedRunningLengthWord32(EWAHIterator32 iterator)
Instantiates a new iterating buffered running length word.

Method Summary

void	discardFirstWords(int x) Discard first words, iterating to the next running length word if needed.
void	discharge(BitmapStorage32 container) Write out the remaining words
int	discharge(BitmapStorage32 container, int max) Write out up to max words, returns how many were written
protected static void	discharge(BufferedRunningLengthWord32 initialWord, EWAHIterator32 iterator, BitmapStorage32 container) For internal use.
void	dischargeAsEmpty(BitmapStorage32 container) Write out the remain words, transforming them to zeroes.
int	dischargeNegated(BitmapStorage32 container, int max) Write out up to max words (negated), returns how many were written
int	getLiteralWordAt(int index) Get the nth literal word for the current running length word
int	getNumberOfLiteralWords() Gets the number of literal words for the current running length word.
boolean	getRunningBit() Gets the running bit.
int	getRunningLength() Gets the running length.
int	size() Size in uncompressed words of the current running length word.
void	writeLiteralWords(int numWords, BitmapStorage32 container) write the first N literal words to the target bitmap.
void	writeNegatedLiteralWords(int numWords, BitmapStorage32 container) write the first N literal words (negated) to the target bitmap.

Methods inherited from class java.lang.Object

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

Constructor Detail

IteratingBufferedRunningLengthWord32

public IteratingBufferedRunningLengthWord32(EWAHIterator32 iterator)

Instantiates a new iterating buffered running length word.

Parameters:

iterator - iterator

IteratingBufferedRunningLengthWord32

public IteratingBufferedRunningLengthWord32(EWAHCompressedBitmap32 bitmap)

Instantiates a new iterating buffered running length word.

Parameters:

iterator - iterator

Method Detail

discardFirstWords

public void discardFirstWords(int x)

Discard first words, iterating to the next running length word if needed.

Parameters:

x - the x

discharge

public int discharge(BitmapStorage32 container,
                     int max)

Write out up to max words, returns how many were written

Parameters:

container - target for writes

max - maximal number of writes

Returns:

how many written

dischargeNegated

public int dischargeNegated(BitmapStorage32 container,
                            int max)

Write out up to max words (negated), returns how many were written

Parameters:

container - target for writes

max - maximal number of writes

Returns:

how many written

dischargeAsEmpty

public void dischargeAsEmpty(BitmapStorage32 container)

Write out the remain words, transforming them to zeroes.

Parameters:

container - target for writes

discharge

public void discharge(BitmapStorage32 container)

Write out the remaining words

Parameters:

container - target for writes

getLiteralWordAt

public int getLiteralWordAt(int index)

Get the nth literal word for the current running length word

Parameters:

index - zero based index

Returns:

the literal word

getNumberOfLiteralWords

public int getNumberOfLiteralWords()

Gets the number of literal words for the current running length word.

Returns:

the number of literal words

getRunningBit

public boolean getRunningBit()

Gets the running bit.

Returns:

the running bit

getRunningLength

public int getRunningLength()

Gets the running length.

Returns:

the running length

size

public int size()

Size in uncompressed words of the current running length word.

Returns:

the int

writeLiteralWords

public void writeLiteralWords(int numWords,
                              BitmapStorage32 container)

write the first N literal words to the target bitmap. Does not discard the words or perform iteration.

Parameters:

numWords -

container -

writeNegatedLiteralWords

public void writeNegatedLiteralWords(int numWords,
                                     BitmapStorage32 container)

write the first N literal words (negated) to the target bitmap. Does not discard the words or perform iteration.

Parameters:

numWords -

container -

discharge

protected static void discharge(BufferedRunningLengthWord32 initialWord,
                                EWAHIterator32 iterator,
                                BitmapStorage32 container)

For internal use.

Parameters:

initialWord - the initial word

iterator - the iterator

container - the container