parsing atom 1.0 document is incomplete

[Richard Jones-22]

Hi Folks,

I'm brand new to Rome, so apologies if this is a newbie question.

I'm trying to read an ATOM 1.0 document into the atom Feed object, but
while it is partially successful, it does not appear to get all of the
relevant parts of the document.  I am unsure whether this is because
there is a problem with the source document or a problem with the way
that I have read it in.  I am reading and interrogating the document as
follows:

// "is" is a passed FileInputStream for the document on-disk
XmlReader reader = new XmlReader(is);
SyndFeedInput input = new SyndFeedInput();
SyndFeed feed = input.build(reader);
Feed atom = (Feed) feed.createWireFeed();

// mine the atom feed
URI uri_a = new URI(atom.getId());
String title = atom.getTitle();
List<Person> authors = atom.getAuthors();
List<Link> otherLinks = atom.getOtherLinks();
List<Category> categories = atom.getCategories();
Date updated = atom.getUpdated();
Generator generator = atom.getGenerator();
String rights = atom.getRights();

Of all these variables, "categories", "otherLinks" and "generator" are
null.  I did some debugging, and it appears that further to this all the
atom entries are also null although I haven't yet tried to extract them
through the API.

The short atom document I am parsing is as follows; it definitely has
categories, a generator, a number of Other Links, and two entries:

<?xml version="1.0"?>
  <atom:feed xmlns:atom="http://www.w3.org/2005/Atom"
xmlns:ore="http://www.openarchives.org/ore/terms/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:dcterms="http://purl.org/dc/terms/" \
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:c3fn="http://www.cheshire3.org/ns/xsl/"
xmlns:mesur="http://www.mesur.org/schemas/2007-01/mesur#">

   
<atom:id>http://foresite.cheshire3.org/jstor/j100000/i201523/3082143/ore/</atom:id>
    <atom:title>A Title</atom:title>
    <atom:author>
      <atom:name>An Author</atom:name>
    </atom:author>
    <atom:link rel="related" href="http://localhost/stable/view/3082143"/>
    <atom:category scheme="http://www.openarchives.org/ore/terms/"
term="http://www.openarchives.org/ore/terms/Aggregation"
label="Aggregation"/>
    <atom:category scheme="http://purl.org/eprint/type/"
term="http://purl.org/eprint/type/JournalItem" label="Misc Journal Item"/>

    <rdf:Description about="http://localhost/j100000/i201523/3082143/ore/">
     
<ore:isAggregatedBy>http://localhost/j100000/i201523//ore/</ore:isAggregatedBy>
      <dcterms:created>2001-01-005T00:00:00Z</dcterms:created>
    </rdf:Description>

    <atom:link rel="self" type="application/atom+xml"
href="http://localhost/j100000/i201523/3082143/ore/atom.xml"/>
    <atom:updated>2008-04-21T18:21:09Z</atom:updated>
    <atom:generator uri="http://localhost/xsl/">XSLT
Stylesheet</atom:generator>
    <atom:rights>This resource map has unknown rights</atom:rights>

    <rdf:Description
about="http://localhost/j100000/i201523/3082143/ore/atom.xml">
      <dcterms:created>2008-04-18T17:30:00Z</dcterms:created>
    </rdf:Description>

    <atom:entries>

      <atom:entry>
       
<atom:id>http://localhost/j100000/i201523/3082143/ore/proxy/pdf</atom:id>
        <atom:title>the title (PDF)</atom:title>
        <atom:updated>2008-04-21T18:21:09Z</atom:updated>
        <atom:link rel="alternate" type="application/pdf"
href="http://localhost/3082143.pdf"/>
        <atom:category scheme="http://purl.org/dc/dcmitype/"
term="http://purl.org/dc/dcmitype/Text" label="Document"/>
      </atom:entry>

      <atom:entry>
       
<atom:id>http://localhost/j100000/i201523/3082143/ore/proxy/page/1</atom:id>
        <atom:title>Page 1 of 'the title'</atom:title>
        <atom:updated>2008-04-21T18:21:09Z</atom:updated>
        <atom:link rel="alternate" href="http://localhost/3082143?seq=1"/>
        <atom:category scheme="http://purl.org/dc/dcmitype/"
term="http://purl.org/dc/dcmitype/Image" label="Image"/>
      </atom:entry>

    </atom:entries>

  </atom:feed>

Any clues as to where my problems lie would be gratefully received.

Cheers,

Richard

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[Jeff Carty]

I can't answer your question directly, because I simply use the SyndFeed object.  I have no problem getting to title, authors, links, categories, and the rest, on that object.

One other point: I wrap the InputStream in something more basic like InputStreamReader/BufferedReader, not in XmlReader.   But then again, people tell me my codee has problems handling special characters ;-)

Hope this helps!

Jeff

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[Richard Jones-22]

Hi Jeff,

> I can't answer your question directly, because I simply use the SyndFeed object.  I have no problem getting to title, authors, links, categories, and the rest, on that object.
>  

I've put some debug on this object as well, and it is certain that the
SyndFeed that I get back here:

SyndFeedInput input = new SyndFeedInput();
SyndFeed feed = input.build(reader);

is lacking in all the details as well, so nothing is being lost in
conversion to the atom wirefeed.

Should I perhaps be configuring the SyndFeedInput class in some way in
advance?  It seems to correctly detect an atom 1.0 feed.
> One other point: I wrap the InputStream in something more basic like InputStreamReader/BufferedReader, not in XmlReader.   But then again, people tell me my codee has problems handling special characters ;-)
>  
:)

I tried switching to using an InputStreamReader, but it didn't make any
difference.

I have now stripped all the actual content which is recognised from my
atom source document, so I am just trying to parse the following:

<?xml version="1.0"?>
<atom:feed xmlns:atom="http://www.w3.org/2005/Atom"
xmlns:ore="http://www.openarchives.org/ore/terms/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:dcterms="http://purl.org/dc/terms/"
xmlns:dc="http://purl.org/dc/elements/1.1/">

    <atom:link rel="related" href="http://localhost/3082143"/>
    <atom:category scheme="http://www.openarchives.org/ore/terms/"
term="http://www.openarchives.org/ore/terms/Aggregation"
label="Aggregation"/>
    <atom:category scheme="http://purl.org/eprint/type/"
term="http://purl.org/eprint/type/JournalItem" label="Misc Journal Item"/>
    <atom:link rel="self" type="application/atom+xml"
href="http://localhost/j100000/i201523/3082143/ore/atom.xml"/>
    <atom:generator uri="http://localhost/xsl/">XSLT
Stylesheet</atom:generator>

    <atom:entries>

      <atom:entry>
       
<atom:id>http://localhost/j100000/i201523/3082143/ore/proxy/pdf</atom:id>
        <atom:title>The Title (PDF)</atom:title>
        <atom:updated>2008-04-21T18:21:09Z</atom:updated>
        <atom:link rel="alternate" type="application/pdf"
href="http://localhost/3082143.pdf"/>
        <atom:category scheme="http://purl.org/dc/dcmitype/"
term="http://purl.org/dc/dcmitype/Text" label="Document"/>
      </atom:entry>

      <atom:entry>
       
<atom:id>http://localhost/j100000/i201523/3082143/ore/proxy/page/1</atom:id>
        <atom:title>Page 1 of 'The Title'</atom:title>
        <atom:updated>2008-04-21T18:21:09Z</atom:updated>
        <atom:link rel="alternate" href="http://localhost/3082143?seq=1"/>
        <atom:category scheme="http://purl.org/dc/dcmitype/"
term="http://purl.org/dc/dcmitype/Image" label="Image"/>
      </atom:entry>

    </atom:entries>

</atom:feed>

I ran .toString() on both the SyndFeed and the atom Feed objects, with
the following results

SyndFeed:

SyndFeedImpl.contributors=null
SyndFeedImpl.link=null
SyndFeedImpl.foreignMarkup=[]
SyndFeedImpl.image=null
SyndFeedImpl.links=null
SyndFeedImpl.copyright=null
SyndFeedImpl.interface=interface com.sun.syndication.feed.synd.SyndFeed
SyndFeedImpl.descriptionEx=null
SyndFeedImpl.supportedFeedTypes[0]=rss_0.91N
SyndFeedImpl.supportedFeedTypes[1]=rss_0.93
SyndFeedImpl.supportedFeedTypes[2]=rss_0.92
SyndFeedImpl.supportedFeedTypes[3]=rss_1.0
SyndFeedImpl.supportedFeedTypes[4]=rss_0.94
SyndFeedImpl.supportedFeedTypes[5]=rss_2.0
SyndFeedImpl.supportedFeedTypes[6]=rss_0.91U
SyndFeedImpl.supportedFeedTypes[7]=rss_0.9
SyndFeedImpl.supportedFeedTypes[8]=atom_1.0
SyndFeedImpl.supportedFeedTypes[9]=atom_0.3
SyndFeedImpl.uri=null
SyndFeedImpl.titleEx=null
SyndFeedImpl.author=null
SyndFeedImpl.authors=null
SyndFeedImpl.title=null
SyndFeedImpl.feedType=atom_1.0
SyndFeedImpl.description=null
SyndFeedImpl.encoding=null
SyndFeedImpl.entries=[]
SyndFeedImpl.categories=[]
SyndFeedImpl.publishedDate=null
SyndFeedImpl.language=null
SyndFeedImpl.modules[0].publishers=[]
SyndFeedImpl.modules[0].subjects=[]
SyndFeedImpl.modules[0].identifiers=[]
SyndFeedImpl.modules[0].coverages=[]
SyndFeedImpl.modules[0].subject=null
SyndFeedImpl.modules[0].rights=null
SyndFeedImpl.modules[0].date=null
SyndFeedImpl.modules[0].type=null
SyndFeedImpl.modules[0].descriptions=[]
SyndFeedImpl.modules[0].sources=[]
SyndFeedImpl.modules[0].creator=null
SyndFeedImpl.modules[0].formats=[]
SyndFeedImpl.modules[0].publisher=null
SyndFeedImpl.modules[0].languages=[]
SyndFeedImpl.modules[0].title=null
SyndFeedImpl.modules[0].dates=[]
SyndFeedImpl.modules[0].description=null
SyndFeedImpl.modules[0].contributor=null
SyndFeedImpl.modules[0].types=[]
SyndFeedImpl.modules[0].contributors=[]
SyndFeedImpl.modules[0].relation=null
SyndFeedImpl.modules[0].format=null
SyndFeedImpl.modules[0].interface=interface
com.sun.syndication.feed.module.DCModule
SyndFeedImpl.modules[0].uri=http://purl.org/dc/elements/1.1/
SyndFeedImpl.modules[0].creators=[]
SyndFeedImpl.modules[0].source=null
SyndFeedImpl.modules[0].coverage=null
SyndFeedImpl.modules[0].relations=[]
SyndFeedImpl.modules[0].rightsList=[]
SyndFeedImpl.modules[0].titles=[]
SyndFeedImpl.modules[0].language=null
SyndFeedImpl.modules[0].identifier=null


Atom Feed:

Feed.rights=null
Feed.alternateLinks=[]
Feed.xmlBase=null
Feed.titleEx=null
Feed.info=null
Feed.id=null
Feed.authors=[]
Feed.title=null
Feed.updated=null
Feed.encoding=null
Feed.generator=null
Feed.entries=[]
Feed.icon=null
Feed.logo=null
Feed.contributors=[]
Feed.otherLinks=[]
Feed.foreignMarkup=[]
Feed.copyright=null
Feed.modified=null
Feed.feedType=atom_1.0
Feed.subtitle=null
Feed.categories=null
Feed.language=null
Feed.modules[0].publishers=[]
Feed.modules[0].subjects=[]
Feed.modules[0].identifiers=[]
Feed.modules[0].coverages=[]
Feed.modules[0].subject=null
Feed.modules[0].rights=null
Feed.modules[0].date=null
Feed.modules[0].type=null
Feed.modules[0].descriptions=[]
Feed.modules[0].sources=[]
Feed.modules[0].creator=null
Feed.modules[0].formats=[]
Feed.modules[0].publisher=null
Feed.modules[0].languages=[]
Feed.modules[0].title=null
Feed.modules[0].dates=[]
Feed.modules[0].description=null
Feed.modules[0].contributor=null
Feed.modules[0].types=[]
Feed.modules[0].contributors=[]
Feed.modules[0].relation=null
Feed.modules[0].format=null
Feed.modules[0].interface=interface com.sun.syndication.feed.module.DCModule
Feed.modules[0].uri=http://purl.org/dc/elements/1.1/
Feed.modules[0].creators=[]
Feed.modules[0].source=null
Feed.modules[0].coverage=null
Feed.modules[0].relations=[]
Feed.modules[0].rightsList=[]
Feed.modules[0].titles=[]
Feed.modules[0].language=null
Feed.modules[0].identifier=null
Feed.tagline=null

I'm totally stumped :)  Any other ideas?

Cheers,

Richard

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[Richard Jones-22]

Hi Jeff,

I have found my answer, which is to read in the InputStream like this
instead:

XmlReader reader = new XmlReader(is);
WireFeedInput input = new WireFeedInput();
Feed atom = (Feed) input.build(reader);

in addition, there was an unnecessary/illegal <entities> tag which was
further messing things up!

Thanks for your help,

Richard

> Hi Jeff,
>
>  
>> I can't answer your question directly, because I simply use the SyndFeed object.  I have no problem getting to title, authors, links, categories, and the rest, on that object.
>>
>>    
>
> I've put some debug on this object as well, and it is certain that the
> SyndFeed that I get back here:
>
> SyndFeedInput input = new SyndFeedInput();
> SyndFeed feed = input.build(reader);
>
> is lacking in all the details as well, so nothing is being lost in
> conversion to the atom wirefeed.
>
> Should I perhaps be configuring the SyndFeedInput class in some way in
> advance?  It seems to correctly detect an atom 1.0 feed.
>  
>> One other point: I wrap the InputStream in something more basic like InputStreamReader/BufferedReader, not in XmlReader.   But then again, people tell me my codee has problems handling special characters ;-)
>>
>>    
> :)
>
> I tried switching to using an InputStreamReader, but it didn't make any
> difference.
>
> I have now stripped all the actual content which is recognised from my
> atom source document, so I am just trying to parse the following:
>
> <?xml version="1.0"?>
> <atom:feed xmlns:atom="http://www.w3.org/2005/Atom"
> xmlns:ore="http://www.openarchives.org/ore/terms/"
> xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
> xmlns:dcterms="http://purl.org/dc/terms/"
> xmlns:dc="http://purl.org/dc/elements/1.1/">
>
>     <atom:link rel="related" href="http://localhost/3082143"/>
>     <atom:category scheme="http://www.openarchives.org/ore/terms/"
> term="http://www.openarchives.org/ore/terms/Aggregation"
> label="Aggregation"/>
>     <atom:category scheme="http://purl.org/eprint/type/"
> term="http://purl.org/eprint/type/JournalItem" label="Misc Journal Item"/>
>     <atom:link rel="self" type="application/atom+xml"
> href="http://localhost/j100000/i201523/3082143/ore/atom.xml"/>
>     <atom:generator uri="http://localhost/xsl/">XSLT
> Stylesheet</atom:generator>
>
>     <atom:entries>
>
>       <atom:entry>
>
> <atom:id>http://localhost/j100000/i201523/3082143/ore/proxy/pdf</atom:id>
>         <atom:title>The Title (PDF)</atom:title>
>         <atom:updated>2008-04-21T18:21:09Z</atom:updated>
>         <atom:link rel="alternate" type="application/pdf"
> href="http://localhost/3082143.pdf"/>
>         <atom:category scheme="http://purl.org/dc/dcmitype/"
> term="http://purl.org/dc/dcmitype/Text" label="Document"/>
>       </atom:entry>
>
>       <atom:entry>
>
> <atom:id>http://localhost/j100000/i201523/3082143/ore/proxy/page/1</atom:id>
>         <atom:title>Page 1 of 'The Title'</atom:title>
>         <atom:updated>2008-04-21T18:21:09Z</atom:updated>
>         <atom:link rel="alternate" href="http://localhost/3082143?seq=1"/>
>         <atom:category scheme="http://purl.org/dc/dcmitype/"
> term="http://purl.org/dc/dcmitype/Image" label="Image"/>
>       </atom:entry>
>
>     </atom:entries>
>
> </atom:feed>
>
> I ran .toString() on both the SyndFeed and the atom Feed objects, with
> the following results
>
> SyndFeed:
>
> SyndFeedImpl.contributors=null
> SyndFeedImpl.link=null
> SyndFeedImpl.foreignMarkup=[]
> SyndFeedImpl.image=null
> SyndFeedImpl.links=null
> SyndFeedImpl.copyright=null
> SyndFeedImpl.interface=interface com.sun.syndication.feed.synd.SyndFeed
> SyndFeedImpl.descriptionEx=null
> SyndFeedImpl.supportedFeedTypes[0]=rss_0.91N
> SyndFeedImpl.supportedFeedTypes[1]=rss_0.93
> SyndFeedImpl.supportedFeedTypes[2]=rss_0.92
> SyndFeedImpl.supportedFeedTypes[3]=rss_1.0
> SyndFeedImpl.supportedFeedTypes[4]=rss_0.94
> SyndFeedImpl.supportedFeedTypes[5]=rss_2.0
> SyndFeedImpl.supportedFeedTypes[6]=rss_0.91U
> SyndFeedImpl.supportedFeedTypes[7]=rss_0.9
> SyndFeedImpl.supportedFeedTypes[8]=atom_1.0
> SyndFeedImpl.supportedFeedTypes[9]=atom_0.3
> SyndFeedImpl.uri=null
> SyndFeedImpl.titleEx=null
> SyndFeedImpl.author=null
> SyndFeedImpl.authors=null
> SyndFeedImpl.title=null
> SyndFeedImpl.feedType=atom_1.0
> SyndFeedImpl.description=null
> SyndFeedImpl.encoding=null
> SyndFeedImpl.entries=[]
> SyndFeedImpl.categories=[]
> SyndFeedImpl.publishedDate=null
> SyndFeedImpl.language=null
> SyndFeedImpl.modules[0].publishers=[]
> SyndFeedImpl.modules[0].subjects=[]
> SyndFeedImpl.modules[0].identifiers=[]
> SyndFeedImpl.modules[0].coverages=[]
> SyndFeedImpl.modules[0].subject=null
> SyndFeedImpl.modules[0].rights=null
> SyndFeedImpl.modules[0].date=null
> SyndFeedImpl.modules[0].type=null
> SyndFeedImpl.modules[0].descriptions=[]
> SyndFeedImpl.modules[0].sources=[]
> SyndFeedImpl.modules[0].creator=null
> SyndFeedImpl.modules[0].formats=[]
> SyndFeedImpl.modules[0].publisher=null
> SyndFeedImpl.modules[0].languages=[]
> SyndFeedImpl.modules[0].title=null
> SyndFeedImpl.modules[0].dates=[]
> SyndFeedImpl.modules[0].description=null
> SyndFeedImpl.modules[0].contributor=null
> SyndFeedImpl.modules[0].types=[]
> SyndFeedImpl.modules[0].contributors=[]
> SyndFeedImpl.modules[0].relation=null
> SyndFeedImpl.modules[0].format=null
> SyndFeedImpl.modules[0].interface=interface
> com.sun.syndication.feed.module.DCModule
> SyndFeedImpl.modules[0].uri=http://purl.org/dc/elements/1.1/
> SyndFeedImpl.modules[0].creators=[]
> SyndFeedImpl.modules[0].source=null
> SyndFeedImpl.modules[0].coverage=null
> SyndFeedImpl.modules[0].relations=[]
> SyndFeedImpl.modules[0].rightsList=[]
> SyndFeedImpl.modules[0].titles=[]
> SyndFeedImpl.modules[0].language=null
> SyndFeedImpl.modules[0].identifier=null
>
>
> Atom Feed:
>
> Feed.rights=null
> Feed.alternateLinks=[]
> Feed.xmlBase=null
> Feed.titleEx=null
> Feed.info=null
> Feed.id=null
> Feed.authors=[]
> Feed.title=null
> Feed.updated=null
> Feed.encoding=null
> Feed.generator=null
> Feed.entries=[]
> Feed.icon=null
> Feed.logo=null
> Feed.contributors=[]
> Feed.otherLinks=[]
> Feed.foreignMarkup=[]
> Feed.copyright=null
> Feed.modified=null
> Feed.feedType=atom_1.0
> Feed.subtitle=null
> Feed.categories=null
> Feed.language=null
> Feed.modules[0].publishers=[]
> Feed.modules[0].subjects=[]
> Feed.modules[0].identifiers=[]
> Feed.modules[0].coverages=[]
> Feed.modules[0].subject=null
> Feed.modules[0].rights=null
> Feed.modules[0].date=null
> Feed.modules[0].type=null
> Feed.modules[0].descriptions=[]
> Feed.modules[0].sources=[]
> Feed.modules[0].creator=null
> Feed.modules[0].formats=[]
> Feed.modules[0].publisher=null
> Feed.modules[0].languages=[]
> Feed.modules[0].title=null
> Feed.modules[0].dates=[]
> Feed.modules[0].description=null
> Feed.modules[0].contributor=null
> Feed.modules[0].types=[]
> Feed.modules[0].contributors=[]
> Feed.modules[0].relation=null
> Feed.modules[0].format=null
> Feed.modules[0].interface=interface com.sun.syndication.feed.module.DCModule
> Feed.modules[0].uri=http://purl.org/dc/elements/1.1/
> Feed.modules[0].creators=[]
> Feed.modules[0].source=null
> Feed.modules[0].coverage=null
> Feed.modules[0].relations=[]
> Feed.modules[0].rightsList=[]
> Feed.modules[0].titles=[]
> Feed.modules[0].language=null
> Feed.modules[0].identifier=null
> Feed.tagline=null
>
> I'm totally stumped :)  Any other ideas?
>
> Cheers,
>
> Richard
>
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>
>
>  

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[club_lowlow]

I see the same problem concerning Atom 1.0 feeds using the Rome Fetcher subproject, any ideas on how I can get the Atom 1.0 feeds to populate the SyndEntry items correctly?

>I have found my answer, which is to read in the InputStream like this
>instead:
>
>XmlReader reader = new XmlReader(is);
>WireFeedInput input = new WireFeedInput();
>Feed atom = (Feed) input.build(reader);

[Richard Jones-22]

Hi,

> I see the same problem concerning Atom 1.0 feeds using the Rome Fetcher
> subproject, any ideas on how I can get the Atom 1.0 feeds to populate the
> SyndEntry items correctly?
>  

I haven't been able to get Rome to ever correctly construct SyndFeeds.
The only mechanism that seems to work is to use the WireFeed method
below. There seems to be a problem during serialisation too, see
upcoming email ...

>  
>> I have found my answer, which is to read in the InputStream like this
>> instead:
>>
>> XmlReader reader = new XmlReader(is);
>> WireFeedInput input = new WireFeedInput();
>> Feed atom = (Feed) input.build(reader);
>>    
>
>
> --
> View this message in context: http://www.nabble.com/parsing-atom-1.0-document-is-incomplete-tp16963850p18222880.html
> Sent from the Rome - Users mailing list archive at Nabble.com.
>
>
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>
>  

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=======================================================================
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eml: richard.d.jones@...       -------------------------------------
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