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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1724) Analysis package calls Java 1.5 API
Date Tue, 30 Jun 2009 11:44:47 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12725585#action_12725585
] 

Uwe Schindler commented on LUCENE-1724:
---------------------------------------

The problem is, some contribs must be build with 1.5. So you need to use at least 1.5 for
the whole build. The core and anaylsis javac are parametrized with -source and -target to
1.4 which generates 1.4 java classes out of only 1.4 compatible source code.

The problem here is, that the java compiler has no possibility to check if a *method/class*
is available in 1.4, as it only knows his own rt.jar (normally it could e.g. use the @since
javadoc tag, but this is not includedin the rt.jar and an annotation is not available). This
is a well known problem to all java developers.

> Analysis package calls Java 1.5 API
> -----------------------------------
>
>                 Key: LUCENE-1724
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1724
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Analysis
>            Reporter: Simon Willnauer
>            Assignee: Michael McCandless
>             Fix For: 2.9
>
>         Attachments: CharacterCache.patch
>
>
> I found compile errors when I tried to compile trunk with 1.4 JVM.
> org.apache.lucene.analysis.NormalizeCharMap
> org.apache.lucene.analysis.MappingCharFilter
> uses Character.valueOf() which has been added in 1.5.
> I added a CharacterCache (+ testcase) with a valueOf method as a replacement for that
quite useful method.
> org.apache.lucene.analysis.BaseTokenTestCase
> uses StringBuilder instead of the synchronized version StringBuffer (available in 1.4)
> I will attach a patch shortly.

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