[Springframework-developer] Linked and identity maps

[<jue...@we...>]

Following the suggestion in
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http://opensource.atlassian.com/projects/spring/browse/SPR-352
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I've added a CollectionFactory helper to our core package, abstracting =
the creation of linked and identity maps (called by bean factory stuff, =
JdbcTemplate, HashMapCachingAdvisorChainFactory).
It primarily uses JDK 1.4 collections when available, checks for Commons =
Collection 3.x as secondary choice (on JDK <=3D 1.4), and falls back to =
standard JDK 1.3 collections else.
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This means that we can retain the insertion order of managed maps and =
use efficient method lookup in HashMapCachingAdvisorChainFactory on JDK =
1.3 too now, provided that Commons Collections 3.x is on the classpath. =
On plain JDK 1.3, we have no other choice as to fall back to the =
standard HashMap.
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Juergen