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From "Erick Erickson" <erickerick...@gmail.com>
Subject Re: can Lucene index different amount of attributes to one document?
Date Tue, 09 Jan 2007 13:50:06 GMT
But do be aware that, as one should expect, you can get a null result from
doc.get("a") if field "a" isn't in the document. You can use
doc.getFieldsto test ahead of the fetch if you need to.

Erick

On 1/9/07, Otis Gospodnetic <otis_gospodnetic@yahoo.com> wrote:
>
> Yes, documents can have different fields.  One document can have fields A
> and B, and another document can have fields C and D.
>
> Otis
>
> ----- Original Message ----
> From: David <zhouchengly@gmail.com>
> To: java-user@lucene.apache.org
> Sent: Tuesday, January 9, 2007 5:55:28 AM
> Subject: can Lucene index different amount of attributes to one document?
>
> Hi all:
>     I know that we can use doc.add(attr, value) to add attributes to the
> document, can we add different amount of attributes to one document?
> for example, can this pseudo code  runnable?
>
> public static Document Document(MyObject o)
> {
>     Document doc = new Document();
>
>     for(i=0; i<o.attribute_len(); i++)
>        if(o.attributes(i).value != "") //only if the attribute exist, we
> index it.
>               doc.add(new Field(o.attrbute(i).name, o.attrbute(i).value)
> ....);
>     }
>     return doc;
> }
>
> if we can do this, are there any special steps when search the on these
> attributes?
>
> Appreciate your help!
>
>
>
> --
> David
>
>
>
>
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