File: CHANGELOG

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libjavaewah-java 0.7.9-1
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version 0.7.9 (November 12th 2013)
 - Spelled out the license in the source code to avoid any confusion

version 0.7.8 (October 1st 2013)
 - Resolved an issue with addStream... methods.

version 0.7.7 (October 1st 2013)
 - Resolved an issue with 32-bit EWAH caused by a partial update in version 0.7.6.

version 0.7.6 (September 30th 2013)
 - Fixed a memory leak 

version 0.7.5 (September 7th 2013)
 - Fixed recently introduced "Get" method. Better unit testing.

version 0.7.4 (September 7th 2013)
 - Added a convenience method that allows you to query for the value of a bit (based on code by @zhenjl)

version 0.7.3 (August 8th 2013)
 - Fixed bug that could sometimes arise with the new iterator-based processing (O. Kaser)


version 0.7.2 (July 25th 2013)
 - Clarifying the difference between setSizeInBits(int) and
   setSizeInBits(int,boolean). Some code that worked previously
   (but was potentially unsafe) might throw an exception when
   using setSizeInBits(int). The fix is to call setSizeInBits(int,false)
   which will be equivalent, but safer. 

version 0.7.1 (July 16th 2013)
 - From now on, we require java 6 or better: in practice this means
 that we are starting to use annotations such as @Override. 
 - We revert to the pre-0.7 behavior by setting the "sizeInBits" 
 of the bitmaps according to the max of the input bitmaps (issue 27).


version 0.7.0 (July 16th 2013)
 - Performance improvements when aggregating several bitmaps
 - Introduction of an iterator-based approach

version 0.6.12 (May 21st 2013)
 - Fixed bug with addStreamOfNegatedDirtyWords (Vicent Marti)
 - Removed some unnecessary recursion

version 0.6.11 (March 29, 2013)
 - fixed issue 26: Inconsistent iterators after using "setSizeInBits"	

version 0.6.10 (March 14, 2013) 
 - replaced private methods by renamed public methods to enhance extensibility
 - fixed bug in and-aggregation (Gabriel Magniez)

version 0.6.9 (March 8, 2013)
 - Using maven-bundle-plugin (for JGIT, as per Alexander Riss's request)
 - Minor: Fixed a typo in example.java

version 0.6.8 (February 21, 2013)
 - Fixed an issue with hasNext in iterator (issue 22). 
 - Added corresponding unit test.


version 0.6.7 (February 15, 2013)
 - Fixed an issue with setSizeInBits (issue 21). 
 - Added corresponding unit test.


version 0.6.6 (December 12, 2012)
 - Fixed an off-by-one bug in setSizeInBits(final int size, final boolean defaultvalue). 
 - Added corresponding unit test.

version 0.6.5 (November 26, 2012)
 - Fixed a bug in IteratingBufferedRunningLengthWord.discharge
 that might cause "and" to return spurious values in some cases (issue #19 reported by  Gregory Ssi-Yan-Kai)
 - added a unit test so that this sort of bug will be caught in the future


version 0.6.4 (November 16, 2012)
 - Fixed a bug in IteratingBufferedRunningLengthWord.discardFirstWords
 that might cause "and" to return the empty set when there is actually 
 a result (issue #18 reported by  Bilal Tayara)
 - added a unit test so that this sort of bug will be caught in the future

version 0.6.3 (October 31, 2012)
 - Fixed a design issue in NonEmptyVirtualStorage32 and NonEmptyVirtualStorage
 that might cause "equals" to give the wrong answer.

version 0.6.2 (October 19, 2012)
 - Cleaned up "andNot" and "xor" so that the implementation is simpler
 - Minor refactoring

version 0.6.1 (October 18, 2012)
 - Optimized the logical and operation and rewrote the logical or operation
 - Sometimes we used the term "literal" and sometimes "dirty". We now use only the term "literal".

version 0.6.0 (October 15, 2012)
 - Moved packages from javaewah to com.googlecode.javaewah (request by Eclipse)

version 0.5.6 (October 5, 2012)
 - Improve performance of the IntIterator implementation (Colby Ranger)
 - Fixed copyright notice (Google Inc. via Colby Ranger)

version 0.5.5 (October 5, 2012)
 - Fixed bug with new hashCode (from previous version), added unit test (Colby Ranger)
 - better example.java
 - new "bitmapOf" method (Colby Ranger)


version 0.5.4 (October 5, 2012)
 - Changed the semantics of "equals" to be more consistent with BitSet from the Java API. (Colby Ranger)


version 0.5.3 (August 7, 2012)
 - Correct a bug where the intersects method was returning false positives. The bug occurs when we attempt to add zero set bits to the stream of dirty words. Fixed / tested for 64 bit and 32 bit variants, also testing every flow through the and() method when called from intersects method.
 - Re-enable the testOrCardinality for the 64 bit variant.
 - Change behavior of NonEmptyException so we only throw the Exception if the number of dirty words is positive (and thus we are trying to set none).
 - Fix documentation in 32 bit impl.
 - remove unneeded returns in 64 bit implementation.

version 0.5.2 (July 9, 2012)
- Now being explicit about range of allowed set values, throws exceptions when out of range.


version 0.5.1 (May 28, 2012)
- Fixed minor performance regression.


version 0.5.0 (May 23, 2012)
- Added a 32-bit version of the compression scheme.


version 0.4.5 (May 21, 2012)
- Introduced the toArray method to retrieve set bits.


version 0.4.4 (May 21, 2012)
- Perf. boost when decoding bitmaps.

version 0.4.3 (April 9, 2012)

- fast aggregation through logical AND of many bitmaps using a new method 
- fixed a rarely occuring bug in the set method due to faulty bitmap size extension

version 0.4.2 (April 5, 2012)

* Fixed a bug with intersects method

version 0.4.1 (Mar 20, 2012)

* Resolved "EWAHCompressedBitmap.iterator() does not follow Java's contract for the Iterator interface"
* some performance enhancements for multi or.  array iteration is performing better than list iteration.
* documentation update


version 0.4.0 (Mar 5, 2012)

Several optimizations and (minor) API changes by David McIntosh. We expect
that the API is backward compatible, howerver serialization won't be
compatible with previous versions.

1) slight tweak to serialization to use the actualsizeinwords to set the buffer size when deserializing so it doesn't allocate more memory than it really needs.
2) added an orCardinality method that is a shortcut for bitmap1.or(bitmap2).cardinality() but doesn't need to create an intermediate bitmap.
3) added static or and orCardinality methods that can handle N number of bitmaps.  For example, bitmap1.or(bitmap2).or(bitmap3) could be done as EWAHCompressedBitmap.or(bitmap1, bitmap2, bitmap3).  It can be slower when N is small but avoids having to create N-2 intermediate bitmaps.
4) Long.bitCount is much faster when counting bits in the cardinality() method.

version 0.3.3 (Mar 2, 2012)

Correcting bug in intersect method (Robert Becho).

version 0.3.2 (Jan 16, 2012)

Better documentation and introduction 
of a few methods (intersects).

version 0.3.1 (Jan 2, 2012)

The code is now built using maven.

version 0.3 (Jun 21, 2011)

The code was optimized slightly for speed. 
You may a gain of about 20% on some operations, 
and no gain on other operations.


version 0.2 (Mar 4, 2011)

In this release, there is a minor change to the 
API: the getPositions method now returns an ArrayList 
instead of a Vector.

version 0.1 : was never released publicly.