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From "Robert Muir (JIRA)" <>
Subject [jira] Commented: (LUCENE-1257) Port to Java5
Date Fri, 13 Nov 2009 11:02:39 GMT


Robert Muir commented on LUCENE-1257:

bq. If we find further Java5 conversions after release of 3.0, we can open new issues.
Uwe, I agree, I think you should close the issue.

> 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_ant.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_heavy.patch, LUCENE-1257_heavy.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, shinglematrixfilter_generified.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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