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https://issues.apache.org/jira/browse/LUCENE-129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12462579
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wolfgang hoschek commented on LUCENE-129:
-----------------------------------------
Just to clarify: The empty finalize() method body in MemoryIndex measurabley
improves performance of this class and it does not harm correctness because
MemoryIndex does not require the superclass semantics wrt. concurrency.
> Finalizers are non-canonical
> ----------------------------
>
> Key: LUCENE-129
> URL: https://issues.apache.org/jira/browse/LUCENE-129
> Project: Lucene - Java
> Issue Type: Bug
> Components: Other
> Affects Versions: unspecified
> Environment: Operating System: other
> Platform: All
> Reporter: Esmond Pitt
> Assigned To: Michael McCandless
> Priority: Minor
> Fix For: 2.1
>
>
> The canonical form of a Java finalizer is:
> protected void finalize() throws Throwable()
> {
> try
> {
> // ... local code to finalize this class
> }
> catch (Throwable t)
> {
> }
> super.finalize(); // finalize base class.
> }
> The finalizers in IndexReader, IndexWriter, and FSDirectory don't conform.
> This
> is probably minor or null in effect, but the principle is important.
> As a matter of fact FSDirectory.finaliz() is entirely redundant and could be
> removed, as it doesn't do anything that RandomAccessFile.finalize would do
> automatically.
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