commons-collections/RELEASE-NOTES.html

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<title>RELEASE NOTES: COLLECTIONS 3.1</title>

<center><h2>RELEASE NOTES: COLLECTIONS 3.1</h2></center>

<p>
This release focusses on bug fixes and minor enhancements.
No interface changes, or deprecations have occurred.

<hr />

<center><h3>NEW CLASSES</h3></center>
<ul>
<li>SingletonMap - fully featured singleton Map implementation</li>
<li>TransformedPredicate - A predicate where the input object is transformed [26946]</li>
<li>ObjectGraphIterator - An iterator that can iterate over a graph of objects</li>
<li>AbstractReferenceMap - New base class for reference maps [26503]</li>
</ul>

<center><h3>ENHANCEMENTS</h3></center>
<ul>
<li>ReferenceMap - Changed to extend AbstractReferenceMap, thus gaining a mapIterator() and subclassability [26503]</li>
<li>Fast3Map - Add clone() method</li>
<li>MultiKey - Add getKey(index) and size() methods and make constructor public</li>
<li>MultiHashMap - Add five methods to improve the API</li>
<li>AbstractHashedMap,AbstractLinkedMap - Add methods to access entry methods when protected scope blocks</li>
<li>Functors - Add get methods to retrieve internal state [27515]</li>
<li>Functors - Add additional getInstance() methods for consistency [27856,27857]</li>
<li>CollectionUtils - get(Object,int) method now supports primitive arrays</li>
<li>CollectionUtils - Add size(Object) method to find the size of various collection-like objects [27909]</li>
<li>SingletonIterator - make remove() functionality optional</li>
</ul>

<h4>Made Serializable</h4>
<ul>
<li>Fast3Map [27946]</li>
<li>FixedSizeMap/SortedMap [18815]</li>
<li>LazyMap/SortedMap [18815]</li>
<li>ListOrderedMap [18815]</li>
<li>PredicatedMap/SortedMap [18815]</li>
<li>TransformedMap/SortedMap [18815]</li>
<li>TypedMap/SortedMap [18815]</li>
<li>UnmodifiableMap/SortedMap/OrderedMap [18815]</li>
<li>TiedMapEntry</li>
</ul>

<center><h3>BUG FIXES</h3></center>
<ul>
<li>Map/BidiMap implementations only checked key and not value in entry set contains(Object) and remove(Object)</li>
<li>AbstractHashedMap subclasses failed to clone() correctly [27159]</li>
<li>ExtendedProperties - Close input stream in constructor [27737]</li>
<li>Flat3Map - Handle infinite loops in toString</li>
</ul>

<center><h3>JAVADOC</h3></center>
<ul>
<li>TreeBidiMap - Add javadoc about requiring Comparable entries [26470]</li>
<li>MultiKey - Add extra explanatations, examples and warnings</li>
<li>MultiMap,MultiHashMap - Add extra documentation to clarify the interface and implementation</li>
<li>XxxUtils - Clarify the internal workings of the predicated decorator classes [28115]</li>
</ul>