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