JavaEWAH 1.2.3 · com.googlecode.javaewah.IteratorUtil

Access	Constructor and Description
private	IteratorUtil() Private constructor to prevent instantiation

Method Summary

Modifier and Type	Method and Description
public static int	Returns: the cardinality (number of set bits) corresponding to the iterator cardinality(final IteratingRLW iterator we wish to iterate over i)
public static void	materialize(final IteratingRLW iterator we wish to materialize i, final BitmapStorage where we write c) Generate a bitmap from an iterator.
public static long	Returns: how many words were actually materialized materialize(final IteratingRLW iterator we wish to materialize i, final BitmapStorage where we write c, long maximum number of words we wish to materialize max) Turn an iterator into a bitmap.
public static EWAHCompressedBitmap	Returns: materialized version of the iterator materialize(final IteratingRLW iterator we wish to materialize i) Turn an iterator into a bitmap.
public static IteratingRLW[]	Returns: an array of iterators corresponding to the array of bitmaps toIterators(final EWAHCompressedBitmap... set of bitmaps x)
public static IntIterator	Returns: an iterator over the set bits corresponding to the iterator toSetBitsIntIterator(final IteratingRLW iterator we wish to iterate over i)
public static Iterator<Integer>	Returns: an iterator over the set bits corresponding to the iterator toSetBitsIterator(final IteratingRLW iterator we wish to iterate over i)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

IteratorUtil	back to summary
private IteratorUtil() Private constructor to prevent instantiation

Method Detail

cardinality	back to summary
public static int cardinality(final IteratingRLW i) Parameters i:IteratingRLW iterator we wish to iterate over Returns:int the cardinality (number of set bits) corresponding to the iterator

materialize	back to summary
public static void materialize(final IteratingRLW i, final BitmapStorage c) Generate a bitmap from an iterator. Parameters i:IteratingRLW iterator we wish to materialize c:BitmapStorage where we write

materialize

back to summary

public static void materialize(final IteratingRLW i, final BitmapStorage c)

Generate a bitmap from an iterator.

Parameters

i:IteratingRLW: iterator we wish to materialize
c:BitmapStorage: where we write

materialize	back to summary
public static long materialize(final IteratingRLW i, final BitmapStorage c, long max) Turn an iterator into a bitmap. Parameters i:IteratingRLW iterator we wish to materialize c:BitmapStorage where we write max:long maximum number of words we wish to materialize Returns:long how many words were actually materialized

materialize

back to summary

public static long materialize(final IteratingRLW i, final BitmapStorage c, long max)

Turn an iterator into a bitmap.

Parameters

i:IteratingRLW: iterator we wish to materialize
c:BitmapStorage: where we write
max:long: maximum number of words we wish to materialize

Returns:long

how many words were actually materialized

materialize back to summary

materialize	back to summary
public static EWAHCompressedBitmap materialize(final IteratingRLW i) Turn an iterator into a bitmap. This can be used to effectively clone a bitmap in the following manner: `EWAHCompressedBitmap n = IteratorUtil.materialize(bitmap.getIteratingRLW())); n.setSizeInBitsWithinLastWord(bitmap.sizeInBits());` Parameters i:IteratingRLW iterator we wish to materialize Returns:EWAHCompressedBitmap materialized version of the iterator

public static EWAHCompressedBitmap materialize(final IteratingRLW i)

Turn an iterator into a bitmap. This can be used to effectively clone a bitmap in the following manner: EWAHCompressedBitmap n = IteratorUtil.materialize(bitmap.getIteratingRLW())); n.setSizeInBitsWithinLastWord(bitmap.sizeInBits());

Parameters

i:IteratingRLW: iterator we wish to materialize

Returns:EWAHCompressedBitmap

materialized version of the iterator

toIterators	back to summary
public static IteratingRLW[] toIterators(final EWAHCompressedBitmap... x) Parameters x:EWAHCompressedBitmap[] set of bitmaps Returns:IteratingRLW[] an array of iterators corresponding to the array of bitmaps

toSetBitsIntIterator	back to summary
public static IntIterator toSetBitsIntIterator(final IteratingRLW i) Parameters i:IteratingRLW iterator we wish to iterate over Returns:IntIterator an iterator over the set bits corresponding to the iterator

toSetBitsIterator	back to summary
public static Iterator<Integer> toSetBitsIterator(final IteratingRLW i) Parameters i:IteratingRLW iterator we wish to iterate over Returns:Iterator<Integer> an iterator over the set bits corresponding to the iterator

public final Class IteratorUtil

Constructor Summary

Method Summary

Constructor Detail

Method Detail