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From "Kay Kay (JIRA)" <>
Subject [jira] Commented: (LUCENE-1257) Port to Java5
Date Wed, 11 Nov 2009 00:02:27 GMT


Kay Kay commented on LUCENE-1257:

I am not sure what the consensus w.r.t warnings are - but as much as possible leaving out
SuppressWarnings would be better so that it is transparent in the future to address should
the dependent library change. 

> Port to Java5
> -------------
>                 Key: LUCENE-1257
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Analysis, Examples, Index, Other, Query/Scoring, QueryParser, Search,
Store, Term Vectors
>    Affects Versions: 3.0
>            Reporter: C├ędric Champeau
>            Assignee: Uwe Schindler
>            Priority: Minor
>             Fix For: 3.0
>         Attachments: instantiated_fieldable.patch, LUCENE-1257-BooleanQuery.patch, LUCENE-1257-BooleanScorer_2.patch,
LUCENE-1257-BufferedDeletes_DocumentsWriter.patch, LUCENE-1257-CheckIndex.patch, LUCENE-1257-CloseableThreadLocal.patch,
LUCENE-1257-CompoundFileReaderWriter.patch, LUCENE-1257-ConcurrentMergeScheduler.patch, LUCENE-1257-DirectoryReader.patch,
LUCENE-1257-DisjunctionMaxQuery-more_type_safety.patch, LUCENE-1257-DocFieldProcessorPerThread.patch,
LUCENE-1257-Document.patch, LUCENE-1257-FieldCacheImpl.patch, LUCENE-1257-FieldCacheRangeFilter.patch,
LUCENE-1257-IndexDeleter.patch, LUCENE-1257-IndexDeletionPolicy_IndexFileDeleter.patch, LUCENE-1257-iw.patch,
LUCENE-1257-MTQWF.patch, LUCENE-1257-NormalizeCharMap.patch, LUCENE-1257-o.a.l.util.patch,
LUCENE-1257-org_apache_lucene_document.patch, LUCENE-1257-org_apache_lucene_document.patch,
LUCENE-1257-org_apache_lucene_document.patch, LUCENE-1257-SegmentInfos.patch, LUCENE-1257-StringBuffer.patch,
LUCENE-1257-StringBuffer.patch, LUCENE-1257-StringBuffer.patch, LUCENE-1257-TopDocsCollector.patch,
LUCENE-1257-WordListLoader.patch, LUCENE-1257_analysis.patch, LUCENE-1257_BooleanFilter_Generics.patch,
LUCENE-1257_contrib_benchmark.patch, LUCENE-1257_contrib_benchmark_2.patch, LUCENE-1257_contrib_highlighting.patch,
LUCENE-1257_contrib_memory.patch, LUCENE-1257_contrib_misc.patch, LUCENE-1257_contrib_smartcn.patch,
LUCENE-1257_javacc_upgrade.patch, LUCENE-1257_lucil.patch, LUCENE-1257_lucli.patch, LUCENE-1257_messages.patch,
LUCENE-1257_more_unnecessary_casts.patch, LUCENE-1257_MultiFieldQueryParser.patch, LUCENE-1257_o.a.l.queryParser.patch,, LUCENE-1257_o_a_l_demo.patch, LUCENE-1257_o_a_l_index_test.patch,
LUCENE-1257_o_a_l_index_test.patch, LUCENE-1257_o_a_l_search.patch, LUCENE-1257_o_a_l_search_spans.patch,
LUCENE-1257_org_apache_lucene_index.patch, LUCENE-1257_org_apache_lucene_index.patch, LUCENE-1257_precendence_parser.patch,
LUCENE-1257_queryParser_jj.patch, LUCENE-1257_swing_wikipedia_wordnet_xmlqp.patch, LUCENE-1257_unnecessary_casts.patch,
LUCENE-1257_unnnecessary_casts_2.patch, lucene1257surround1.patch, lucene1257surround1.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 know 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 actually *know*
what is stored in collections reading the code, without the need to lookup for field definitions
everytime) and it simplifies many algorithms.
> Note that this patch also includes an interface for the Query class. This has been done
for my company's needs for building custom Query classes which add some behaviour to the base
Lucene queries. It prevents multiple unnnecessary casts. I know this introduction is not wanted
by the team, but it really makes our developments easier to maintain. If you don't want to
use this, replace all /Queriable/ calls with standard /Query/.

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