[ http://issues.apache.org/jira/browse/LUCENE-301?page=all ]
Michael McCandless resolved LUCENE-301.
---------------------------------------
Fix Version/s: 2.1
Resolution: Fixed
OK I've added the new constructors for IndexWriter. Thank you Dan and sorry
for the long delay!
> Index Writer constructor flags unclear - and annoying in certain cases
> ----------------------------------------------------------------------
>
> Key: LUCENE-301
> URL: http://issues.apache.org/jira/browse/LUCENE-301
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 1.4
> Environment: Operating System: other
> Platform: Other
> Reporter: Dan Armbrust
> Assigned To: Michael McCandless
> Priority: Minor
> Fix For: 2.1
>
>
> Wouldn't it make more sense if the constructor for the IndexWriter always
> created an index if it doesn't exist - and the boolean parameter should be
> "clear" (instead of "create")
> So instead of this (from javadoc):
> IndexWriter
> public IndexWriter(Directory d,
> Analyzer a,
> boolean create)
> throws IOException
> Constructs an IndexWriter for the index in d. Text will be analyzed with
> a.
> If create is true, then a new, empty index will be created in d, replacing the
> index already there, if any.
> Parameters:
> d - the index directory
> a - the analyzer to use
> create - true to create the index or overwrite the existing one; false to
> append to the existing index
> Throws:
> IOException - if the directory cannot be read/written to, or if it does
> not
> exist, and create is false
> We would have this:
> IndexWriter
> public IndexWriter(Directory d,
> Analyzer a,
> boolean clear)
> throws IOException
> Constructs an IndexWriter for the index in d. Text will be analyzed with
> a.
> If clear is true, and a index exists at location d, then it will be erased,
> and
> a new, empty index will be created in d.
> Parameters:
> d - the index directory
> a - the analyzer to use
> clear - true to overwrite the existing one; false to append to the
> existing
> index
> Throws:
> IOException - if the directory cannot be read/written to, or if it does
> not
> exist.
> Its current behavior is kind of annoying, because I have an app that should
> never clear an existing index, it should always append. So I want create set
> to
> false. But when I am starting a brand new index, then I have to change the
> create flag to keep it from throwing an exception... I guess for now I will
> have to write code to check if a index actually has content yet, and if it
> doesn't, change the flag on the fly.
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