akjoshi / nxparser Goto Github PK

The project source code contains three licenses: license-full, license-lite and 
MLP-1.1. Why is that so? What is the "real" license?

I have a .nt file where some of the language tags are upper-case, like this:

<http://www.sorbaioli.org/2009/02/23/wordpress-plugin-for-identica/> 
<http://creativecommons.org/ns#attributionName> "Graziano Sorbaioli"@EN .

I'm not exactly sure if this according to spec or not, but in any case NxParser 
issues a warning when parsing this line:

WARNING: Something wrong with the literal-backing string. The parsing regex 
pattern didn't match. Check the string for correct N3 syntax. The malicious 
string is: "Graziano Sorbaioli"@EN

However, parseNodes() still returns Node objects, but when I try to call 
toString() I get an NPE:

java.lang.NullPointerException
    at org.semanticweb.yars.nx.util.NxUtil.unescape(NxUtil.java:178)
    at org.semanticweb.yars.nx.util.NxUtil.unescape(NxUtil.java:164)
    at org.semanticweb.yars.nx.Literal.toString(Literal.java:235)
    at edu.kit.aifb.ats.triples.test.NxParserTest.test(NxParserTest.java:15)

I'd expect NxParser to fail at parsing time with an exception (or to just 
ignore the line) and not sometime later with an NPE. getData() returns null, 
which is also not great, but would at least be manageable.

Here is the code to reproduce:

    @Test
    public void test() throws ParseException {
        Node[] nx = NxParser.parseNodes("<http://www.sorbaioli.org/2009/02/23/wordpress-plugin-for-identica/> <http://creativecommons.org/ns#attributionName> \"Graziano Sorbaioli\"@EN .");
        System.out.println(nx[2].toString());
    }

Cheers,
Günter

What steps will reproduce the problem?
1. NxParser.parseNodes("<  http://subject/> \"predicate\" \"object\" .");

What is the expected output? What do you see instead?
Expected a ParseException..


What version of the product are you using? On what operating system?
1.2.2

Please provide any additional information below.
I've attached a patch that fixes the issue + simple unit test.  I hope I've 
fixed more problems that I've introduced.

What steps will reproduce the problem?
1. Download file 
http://downloads.dbpedia.org/3.8/en/interlanguage_links_en.ttl.bz2
2. Try to parse it
3. NxParser hangs and does not read anything

What is the expected output? What do you see instead?
Normal n-triple based parsing 

What version of the product are you using? On what operating system?
1.2.2

What steps will reproduce the problem?
1. Feed NxParser with a .nt file containing a "# comment goes here" line
2. Put the kettle on, feed the cats, come back to realise its not processed 
anything

What is the expected output? What do you see instead?

I'd expect it to handle comment lines gracefully, and ignore them.

What version of the product are you using? On what operating system?

1.2.2

Please provide any additional information below.

While processing dumps from the dbpedia-extraction-framework I noticed that my 
import job (using NxParser) was stalled. I attached a debugged and spotted it 
was stuck in while loop in the function loadNext().

I pulled the latest source from SVN (r93) and added a simple workaround.

While I'm not sure that .nt files should have "# comment goes here" comment 
lines; it makes sense to handle them gracefully anyway.

Attached is my simple one-liner fix.

The nodeID of generated Bnodes (here in subject position) can be invalid 
according to the spec because of the star at its end.

E.g.:
_:httpx3Ax2Fx2Fbnbx2Edatax2Eblx2Eukx2Fdocx2Fresourcex2F006893251x2Erdfx3Fx5Fmeta
datax3Dallx2Cviewsx2Cformatsx2Cex78ecutionx2Cbindingsxxtermx5F* 
<http://purl.org/linked-data/api/vocab#label> "*" 
<http://bnb.data.bl.uk/doc/resource/006893251.rdf?_metadata=all,views,formats,ex
ecution,bindings> .

The production rule in the N-Triples spec is:
[A-Za-z][A-Za-z0-9]*

see: http://www.w3.org/TR/rdf-testcases/#name

What steps will reproduce the problem?
1. try parse this url http://www.ingegneriarchitettura.unibo.it/it/bacheca/RSS

What is the expected output? What do you see instead?
it hangs :(

logcat: 
a lot of: 09-10 15:31:47.347: W/System.err(1108):   at 
org.semanticweb.yars.nx.parser.NxParser.loadNext(NxParser.java:113)

What version of the product are you using? On what operating system?
nxparser-1.2.3.jar   (not lite)
on android API 16

thank you anyway!
matteo

See NxUtil test cases.

In RDF 1.1, there are changes to the N-Triples spec. Consider them in the code.

Just wondering if the htmlparser.jar library is needed? Where did it come out 
of? (I know commons-cli is used for parsing command line in the CLI.)

What steps will reproduce the problem?

    public void testParse() throws Exception {
        Node[] nx = new Node[] { new Resource("http://example.org/ b") };

        ByteArrayInputStream bais = new ByteArrayInputStream(Nodes.toN3(nx).getBytes());

        NxParser nxp = new NxParser(bais);
        while (nxp.hasNext()) {
            System.out.println(nxp.next());
        }
    }

What is the expected output? What do you see instead?

The parser should not hang.

Hi guys,

the jar seems to be compiled with Java7?
is that really needed?
would it be possible to provide a Java6 or Java5?

I encounter a 
"java.lang.UnsupportedClassVersionError: org/semanticweb/yars/nx/Resource : 
Unsupported major.minor version 51.0"

exception.

Thanks!
Daniel

What steps will reproduce the problem?

URIHandler.getPLD("http://localhost/")

What is the expected output? What do you see instead?

I would expect an exception (TldManagerException, say).

Instead I see log output, which I do not want to see.

Hi guys,

Since I already posted from my wishlist, here is another wish:
How about providing a maven artefact/repo?

Thanks,
Daniel

What steps will reproduce the problem?
1. Parse "http://ja.dbpedia.org/resource/マンチェスター・シティFC" 
with RdfXmlParser
2. Gives warning.

What is the expected output? What do you see instead?

rapper says the file is ok:

$ rapper "http://ja.dbpedia.org/resource/マンチェスター・シティFC" -c
rapper: Parsing URI 
http://ja.dbpedia.org/resource/マンチェスター・シティFC with parser 
rdfxml
rapper: Parsing returned 996 triples
$

Instead I get (with 2.1-SNAPSHOT):

WARNING: class org.semanticweb.yars.nx.parser.ParseException: 
org.xml.sax.SAXParseException; lineNumber: 882; columnNumber: 19; Element type 
"prop-ja:使用チーム" must be followed by either attribute specifications, 
">" or "/>"., http://ja.dbpedia.org/data/マンチェスター・シティFC.xml
org.semanticweb.yars.nx.parser.ParseException: org.xml.sax.SAXParseException; 
lineNumber: 882; columnNumber: 19; Element type "prop-ja:使用チーム" must 
be followed by either attribute specifications, ">" or "/>".
    at org.semanticweb.yars.rdfxml.RdfXmlParser.parse(RdfXmlParser.java:138)