[ http://issues.apache.org/jira/browse/NUTCH-139?page=all ]
Chris A. Mattmann updated NUTCH-139:
------------------------------------
Attachment: NUTCH-139.Mattmann.patch.txt
Okay Folks,
Here's the patch file. Phew. Spent the whole day working on this today.
Finally got all the unit tests passing :-) It was pretty difficult to figure
out all the different places that the metadata properties were being used, but
I think I nailed it. I'd be happy to hear from anybody that finds differently
of course. So, yeah, please test this in your environments, and let me know
what you guys think. I didn't test extensively, just made sure the unit tests
passed.
The biggest changes were to the protocol and parsing layer, but overall I
also had to update the index-more plugin. This patch also includes several
removals of unused imports in Nutch classes (good ol' Eclipse, I love it how it
tells you that ;) ). Also, I fixed a bug that I just reported in the parse-rtf
plugin where the ParseImpl was not being constructed correctly (or maybe I had
an old version?). Anyways, check it out and let me know what you think.
Thanks Guys!
Cheers,
Chris
> Standard metadata property names in the ParseData metadata
> ----------------------------------------------------------
>
> Key: NUTCH-139
> URL: http://issues.apache.org/jira/browse/NUTCH-139
> Project: Nutch
> Type: Improvement
> Components: fetcher
> Versions: 0.7.1, 0.7, 0.6, 0.7.2-dev, 0.8-dev
> Environment: Power Mac OS X 10.4, Dual Processor G5 2.0 Ghz, 1.5 GB RAM,
> although bug is independent of environment
> Reporter: Chris A. Mattmann
> Assignee: Chris A. Mattmann
> Priority: Minor
> Fix For: 0.7.2-dev, 0.8-dev, 0.7.1, 0.7, 0.6
> Attachments: NUTCH-139.Mattmann.patch.txt
>
> Currently, people are free to name their string-based properties anything
> that they want, such as having names of "Content-type", "content-TyPe",
> "CONTENT_TYPE" all having the same meaning. Stefan G. I believe proposed a
> solution in which all property names be converted to lower case, but in
> essence this really only fixes half the problem right (the case of
> identifying that "CONTENT_TYPE"
> and "conTeNT_TyPE" and all the permutations are really the same). What about
> if I named it "Content Type", or "ContentType"?
> I propose that a way to correct this would be to create a standard set of
> named Strings in the ParseData class that the protocol framework and the
> parsing framework could use to identify common properties such as
> "Content-type", "Creator", "Language", etc.
> The properties would be defined at the top of the ParseData class, something
> like:
> public class ParseData{
> .....
> public static final String CONTENT_TYPE = "content-type";
> public static final String CREATOR = "creator";
> ....
> }
> In this fashion, users could at least know what the name of the standard
> properties that they can obtain from the ParseData are, for example by making
> a call to ParseData.getMetadata().get(ParseData.CONTENT_TYPE) to get the
> content type or a call to ParseData.getMetadata().set(ParseData.CONTENT_TYPE,
> "text/xml"); Of course, this wouldn't preclude users from doing what they are
> currently doing, it would just provide a standard method of obtaining some of
> the more common, critical metadata without pouring over the code base to
> figure out what they are named.
> I'll contribute a patch near the end of the this week, or beg. of next week
> that addresses this issue.
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