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https://issues.apache.org/jira/browse/LUCENE-778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12477962
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Nicolas Lalevée commented on LUCENE-778:
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Note that I was talking about the future API, with some deprecated functions
removed. So the API will look like :
class IndexReader {
ReturnableDocument doc(int n);
}
class IndexWriter {
void addDocument(IndexableDocument doc);
}
1) it does matter from the user point of view : we cannot do anymore
writer.addDocument(reader.doc(10)).
2) Effectively I can implement a DecoratedDocument. But I cannot make Lucene
instanciating my own document, the reader will still return some
ReturnableDocument. Unless you want to allow the user to customize in Lucene
the instanciation of Document by providing a factory of Document ?
> Allow overriding a Document
> ---------------------------
>
> Key: LUCENE-778
> URL: https://issues.apache.org/jira/browse/LUCENE-778
> Project: Lucene - Java
> Issue Type: New Feature
> Affects Versions: 2.0.0
> Reporter: Nicolas Lalevée
> Priority: Trivial
>
> In our application, we have some kind of generic API that is handling how we
> are using Lucene. The different other applications are using this API with
> different semantics, and are using the Lucene fields quite differently. We
> wrote some usefull functions to do this mapping. Today, as the Document class
> cannot be overriden, we are obliged to make a document wrapper by
> application, ie some MyAppDocument and MyOtherAppDocument which have a
> property holding a real Lucene Document. Then, when MyApp or MyOtherApp want
> to use our generic lucene API, we have to "get out" the Lucene document, ie
> do some genericLuceneAPI.writeDoc(myAppDoc.getLuceneDocument()). This work
> fine, but it becomes quite tricky to use the other function of our generic
> API which is genericLuceneAPI.writeDocs(Collection<Document> docs).
> I don't know the rational behind making final Document, but removing it will
> allow more object-oriented code.
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