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From "Digy (JIRA)" <>
Subject [Lucene.Net] [jira] [Commented] (LUCENENET-417) implement streams as field values
Date Wed, 15 Jun 2011 17:33:47 GMT


Digy commented on LUCENENET-417:

OK, File System Indexer is a good example.
Have you tested your code, since I see some codes like
            if (fieldsData is System.IO.Stream)
                var streamReader = new System.IO.BinaryReader((System.IO.Stream)fieldsData);
                byte[] data = new byte[streamReader.BaseStream.Length]; // <----
                streamReader.Read(data, 0, data.Length);

                return data;
            if (fieldsData is Lucene.Net.Util.InternalStreamReader)
                using (var reader = ((Lucene.Net.Util.InternalStreamReader)fieldsData))
                    reader.BaseStream.Seek(0, SeekOrigin.Begin);
                    fieldsData = reader.ReadToEnd();  // <----

Wouldn't they be costly in terms of mem usage?


PS: I still think there should be other solutions(outside of Lucene.Net) to handle these type
of problems. 

> implement streams as field values
> ---------------------------------
>                 Key: LUCENENET-417
>                 URL:
>             Project: Lucene.Net
>          Issue Type: New Feature
>          Components: Lucene.Net Core
>            Reporter: Christopher Currens
>         Attachments: StreamValues.patch
> Adding binary values to a field is an expensive operation, as the whole binary data must
be loaded into memory and then written to the index.  Adding the ability to use a stream instead
of a byte array could not only speed up the indexing process, but reducing the memory footprint
as well.
> -Java lucene has the ability to use a TextReader the both analyze and store text in the
index.-  Lucene.NET lacks the ability to store string data in the index via streams. This
should be a feature added into Lucene .NET as well.  My thoughts are to add another Field
constructor, that is Field(string name, System.IO.Stream stream, System.Text.Encoding encoding),
that will allow the text to be analyzed and stored into the index.
> Comments about this approach are greatly appreciated.

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