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Date: Wed, 2 Apr 2008 01:30:24 -0700 (PDT)
From: =?utf-8?Q?C=C3=A9dric_Champeau_=28JIRA=29?= <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Created: (LUCENE-1257) Port to Java5
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Port to Java5
-------------

                 Key: LUCENE-1257
                 URL: https://issues.apache.org/jira/browse/LUCENE-1257
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Analysis, Examples, Index, Other, Query/Scoring, Quer=
yParser, Search, Store, Term Vectors
    Affects Versions: 2.3.1
            Reporter: C=C3=A9dric Champeau
         Attachments: java5.patch

For my needs I've updated Lucene so that it uses Java 5 constructs. I know =
Java 5 migration had been planned for 2.1 someday in the past, but don't kn=
ow when it is planned now. This patch against the trunk includes :

- most obvious generics usage (there are tons of usages of sets, ... Those =
which are commonly used have been generified)
- PriorityQueue generification
- replacement of indexed for loops with for each constructs
- removal of unnececessary unboxing

The code is to my opinion much more readable with those features (you actua=
lly *know* what is stored in collections reading the code, without the need=
 to lookup for field definitions everytime) and it simplifies many algorith=
ms.

Note that this patch also includes an interface for the Query class. This h=
as been done for my company's needs for building custom Query classes which=
 add some behaviour to the base Lucene queries. It prevents multiple unnnec=
essary casts. I know this introduction is not wanted by the team, but it re=
ally makes our developments easier to maintain. If you don't want to use th=
is, replace all /Queriable/ calls with standard /Query/.


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