Re: How to solve RiotNotFoundException ?

[Julien Plu]

Hi !

I made as I said a little class which solve the errors from the Freebase
Turtle. I put this class in attachment, it's certainly not perfect but it
seems working. If you have any comments on it I will be happy to listen
them.

I will send an email too on the Freebase mailing list to list the three
errors that I met.

Best.

Julien.


2014-02-13 17:15 GMT+01:00 Julien Plu julien@redaction-developpez.com:

 Ok, I will try to create a little class tool which try to do this job, and
 send a mail to the mailing list to warm them of these issues.

 Best.

 Julien.


 2014-02-13 15:38 GMT+01:00 Chris_Dollin ehog.he...@gmail.com:

 On Thursday, February 13, 2014 01:42:33 PM Andy Seaborne wrote:
  On 13/02/14 12:59, Julien Plu wrote:
   Ok I found, it was the  characters. But now there is another bad
 syntax
   which is for example :
  
   ns:type.object.key ns:authority.nndb.854$002F000160374;
  
  
   so problem come from the $002F which means certainly /, by what
   is-it possible to replace this ? Have I to recreate all the URI myself
   ?
 
  If you look in the Turtle spec, you'll see that (RDF 1.1) lots of
  characters are legal in prefix names though they may need to be escaped.
Check it out.
 
  Your higher level decision is whether to correct the intention of the
  URIs or whether to keep the character published.
 
  Feeding all this back to the Freebase people would help.  They could fix
  the data.

 It's their custom key-escape format

   http://wiki.freebase.com/wiki/Weblink

 Quite why it's escaped into their Turtle I don't know.

 Chris

Re: How to solve RiotNotFoundException ?

[Julien Plu]

Thanks for the Java hints !

The line which goes wrong is :

ns:common.topic.description\u05e0\u05e2\u05de\u05d9
\u05de\u05dc\u05d0\u05e0\u05d9 \u05d4\u05d0\u05e8\u05d9\u05e1
\u05d4\u05d9\u05d0 \u05e9\u05d7\u05e7\u05e0\u05d9\u05ea
\u05e7\u05d5\u05dc\u05e0\u05d5\u05e2 \u05d0\u05e0\u05d2\u05dc\u05d9\u05d4,
\u05de\u05d5\u05db\u05e8\u05ea \u05d1\u05d6\u05db\u05d5\u05ea
\u05ea\u05e4\u05e7\u05d9\u05d3\u05d4 \u05db\u05d8\u05d9\u05d4
\u05d3\u05d0\u05dc\u05de\u05d4 \u05d1\u05e1\u05d3\u05e8\u05ea
\u05e1\u05e8\u05d8\u05d9 \[[u]]05e9\u05d5\u05d3\u05d3\u05d9
\u05d4\u05e7\u05d0\u05e8\u05d9\u05d1\u05d9\u05d9\u05dd.@iw;

I highlighted in blue surrounded by two brackets the character which throw
the exception.

Best.

Julien.


2014-02-13 10:41 GMT+01:00 Andy Seaborne a...@apache.org:

 On 13/02/14 09:10, Julien Plu wrote:

 I changed a bit my code to add your advice but I still have an error :

 org.apache.jena.riot.RiotException: [line: 39, col: 467] Unknown char:
 \(92;0x005C)


 Problem with the conversion.

 Print out the converted string to see what the problem is.



 Here the new code :

 try {
URL serviceURL = new URL(
 https://www.googleapis.com/freebase/v1/rdf/m/020c55;);
URLConnection connection = serviceURL.openConnection();
Model model = ModelFactory.createDefaultModel();
BufferedReader bf = new BufferedReader(new
 InputStreamReader(connection.getInputStream()));
String readline;
StringBuilder sb = new StringBuilder();
while ((readline = bf.readLine()) != null) {
sb.append(readline.replaceAll(x, u00)+\n);
}
InputStream in = new ByteArrayInputStream(sb.
 toString().getBytes());


 BAD

 Never use getBytes() for web data.

 1/ Use a StringReader
 2/ If you must convert to bytes, set the charset to be UTF-8 (or ideally
 the charset for the ressponse).


 model.read(in, null, TTL);
  } catch (Exception ex) {
ex.printStackTrace();
  }

 Best

 Julien.


 2014-02-12 19:58 GMT+01:00 Andy Seaborne a...@apache.org:

  On 12/02/14 13:21, Julien Plu wrote:

  Yes I saw my error to lately sorry for disturbing you for nothing :-(

 By the way I can't pass immediately the URL to the model because the
 Turtle
 provided by this URI (and all the others from Freebase) have unicode
 characters encoded with \x so it's not valid Turtle, it's why I try to
 translate (or convert) these characher in \u.

 But my method doesn't works, any idea of how to do this in Java ?


 Best I can see is to get as string, fixup in Java (string replace), then
 use a StringReader.  It's not too big.

 At a wild untested guess, replace all \x with \u00.

 You need to tell it the syntax is TTL but you'd need to do that anyway
 because the HTTP response is Content-Type: text/plain; charset=UTF-8

HTTP/1.1 200 OK
Expires: Wed, 12 Feb 2014 18:50:21 GMT
Date: Wed, 12 Feb 2014 18:50:21 GMT
Cache-Control: private, max-age=0, must-revalidate, no-transform
ETag: 1CZZiDfFArqsKpzUgFQB2V9yilI/MW2d6bfo-oO8n5ovC7d5nFY2_AQ
Content-Type: text/plain; charset=UTF-8
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Content-Length: 32404
Server: GSE
Alternate-Protocol: 443:quic

  Andy



  Best.

 Julien.


 2014-02-12 14:06 GMT+01:00 Rob Vesse rve...@dotnetrdf.org:

   You are trying to read from the downloaded contents of the file
 directly

 which is not going to work.  The model.read() API takes in a name of a
 file/URI to read or it takes in an InputStream.

 Simply pass your input stream directly to the read() call, or even
 simpler
 pass your URI to the read() call and let Jena handle the HTTP request
 for
 you.

 Rob

 On 12/02/2014 12:28, Julien Plu julien@redaction-developpez.com
 
 wrote:

   Hi,


 In getting the Turtle RDF from this URI :
 https://www.googleapis.com/freebase/v1/rdf/m/020c55

 A RiotNotFoundException is thrown :

 org.apache.jena.riot.RiotNotFoundException: Not found: @prefix key: 
 http://rdf.freebase.com/key/.
 @prefix ns: http://rdf.freebase.com/ns/.
 @prefix owl: http://www.w3.org/2002/07/owl#.
 @prefix rdfs: http://www.w3.org/2000/01/rdf-schema#.
 @prefix xsd: http://www.w3.org/2001/XMLSchema#.
 .
 .
 at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:831)
  at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:813)
  at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.
 java:684)
  at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:208)
  at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:181)
  at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:119)
  at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:110)
  at
 org.apache.jena.riot.adapters.RDFReaderRIOT.read(
 RDFReaderRIOT.java:77)
  at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.
 java:259)
  at freebase.Test.main(Test.java:61)

 Here my code :

Re: How to solve RiotNotFoundException ?

[Andy Seaborne]

On 13/02/14 10:29, Julien Plu wrote:

Thanks for the Java hints !

The line which goes wrong is :

ns:common.topic.description\u05e0\u05e2\u05de\u05d9
\u05de\u05dc\u05d0\u05e0\u05d9 \u05d4\u05d0\u05e8\u05d9\u05e1
\u05d4\u05d9\u05d0 \u05e9\u05d7\u05e7\u05e0\u05d9\u05ea
\u05e7\u05d5\u05dc\u05e0\u05d5\u05e2 \u05d0\u05e0\u05d2\u05dc\u05d9\u05d4,
\u05de\u05d5\u05db\u05e8\u05ea \u05d1\u05d6\u05db\u05d5\u05ea
\u05ea\u05e4\u05e7\u05d9\u05d3\u05d4 \u05db\u05d8\u05d9\u05d4
\u05d3\u05d0\u05dc\u05de\u05d4 \u05d1\u05e1\u05d3\u05e8\u05ea
\u05e1\u05e8\u05d8\u05d9 \[[u]]05e9\u05d5\u05d3\u05d3\u05d9
\u05d4\u05e7\u05d0\u05e8\u05d9\u05d1\u05d9\u05d9\u05dd.@iw;

I highlighted in blue surrounded by two brackets the character which throw
the exception.


Step 1: Decide what the problem is.

If you don't understand the syntax error, take the output and chop it 
down to a simple test case.


Step 2: Fix it!

Having found out why the syntax is broken, add code to fix it.

Andy



Best.

Julien.


2014-02-13 10:41 GMT+01:00 Andy Seaborne a...@apache.org:


On 13/02/14 09:10, Julien Plu wrote:


I changed a bit my code to add your advice but I still have an error :

org.apache.jena.riot.RiotException: [line: 39, col: 467] Unknown char:
\(92;0x005C)



Problem with the conversion.

Print out the converted string to see what the problem is.




Here the new code :

try {
URL serviceURL = new URL(
https://www.googleapis.com/freebase/v1/rdf/m/020c55;);
URLConnection connection = serviceURL.openConnection();
Model model = ModelFactory.createDefaultModel();
BufferedReader bf = new BufferedReader(new
InputStreamReader(connection.getInputStream()));
String readline;
StringBuilder sb = new StringBuilder();
while ((readline = bf.readLine()) != null) {
sb.append(readline.replaceAll(x, u00)+\n);
}
InputStream in = new ByteArrayInputStream(sb.
toString().getBytes());



BAD

Never use getBytes() for web data.

1/ Use a StringReader
2/ If you must convert to bytes, set the charset to be UTF-8 (or ideally
the charset for the ressponse).


 model.read(in, null, TTL);

  } catch (Exception ex) {
ex.printStackTrace();
  }

Best

Julien.


2014-02-12 19:58 GMT+01:00 Andy Seaborne a...@apache.org:

  On 12/02/14 13:21, Julien Plu wrote:


  Yes I saw my error to lately sorry for disturbing you for nothing :-(


By the way I can't pass immediately the URL to the model because the
Turtle
provided by this URI (and all the others from Freebase) have unicode
characters encoded with \x so it's not valid Turtle, it's why I try to
translate (or convert) these characher in \u.

But my method doesn't works, any idea of how to do this in Java ?



Best I can see is to get as string, fixup in Java (string replace), then
use a StringReader.  It's not too big.

At a wild untested guess, replace all \x with \u00.

You need to tell it the syntax is TTL but you'd need to do that anyway
because the HTTP response is Content-Type: text/plain; charset=UTF-8

HTTP/1.1 200 OK
Expires: Wed, 12 Feb 2014 18:50:21 GMT
Date: Wed, 12 Feb 2014 18:50:21 GMT
Cache-Control: private, max-age=0, must-revalidate, no-transform
ETag: 1CZZiDfFArqsKpzUgFQB2V9yilI/MW2d6bfo-oO8n5ovC7d5nFY2_AQ
Content-Type: text/plain; charset=UTF-8
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
Content-Length: 32404
Server: GSE
Alternate-Protocol: 443:quic

  Andy



  Best.


Julien.


2014-02-12 14:06 GMT+01:00 Rob Vesse rve...@dotnetrdf.org:

   You are trying to read from the downloaded contents of the file
directly


which is not going to work.  The model.read() API takes in a name of a
file/URI to read or it takes in an InputStream.

Simply pass your input stream directly to the read() call, or even
simpler
pass your URI to the read() call and let Jena handle the HTTP request
for
you.

Rob

On 12/02/2014 12:28, Julien Plu julien@redaction-developpez.com



wrote:

   Hi,



In getting the Turtle RDF from this URI :
https://www.googleapis.com/freebase/v1/rdf/m/020c55

A RiotNotFoundException is thrown :

org.apache.jena.riot.RiotNotFoundException: Not found: @prefix key: 
http://rdf.freebase.com/key/.
@prefix ns: http://rdf.freebase.com/ns/.
@prefix owl: http://www.w3.org/2002/07/owl#.
@prefix rdfs: http://www.w3.org/2000/01/rdf-schema#.
@prefix xsd: http://www.w3.org/2001/XMLSchema#.
.
.
at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:831)
  at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:813)
  at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.
java:684)
  at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:208)
  at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:181)
  at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:119)
  at 

Re: How to solve RiotNotFoundException ?

[Julien Plu]

Ok I found, it was the  characters. But now there is another bad syntax
which is for example :

ns:type.object.key ns:authority.nndb.854$002F000160374;


so problem come from the $002F which means certainly /, by what
is-it possible to replace this ? Have I to recreate all the URI myself
?

Thanks.



2014-02-13 12:23 GMT+01:00 Andy Seaborne a...@apache.org:

 On 13/02/14 10:29, Julien Plu wrote:

 Thanks for the Java hints !

 The line which goes wrong is :

 ns:common.topic.description\u05e0\u05e2\u05de\u05d9
 \u05de\u05dc\u05d0\u05e0\u05d9 \u05d4\u05d0\u05e8\u05d9\u05e1
 \u05d4\u05d9\u05d0 \u05e9\u05d7\u05e7\u05e0\u05d9\u05ea
 \u05e7\u05d5\u05dc\u05e0\u05d5\u05e2 \u05d0\u05e0\u05d2\u05dc\
 u05d9\u05d4,
 \u05de\u05d5\u05db\u05e8\u05ea \u05d1\u05d6\u05db\u05d5\u05ea
 \u05ea\u05e4\u05e7\u05d9\u05d3\u05d4 \u05db\u05d8\u05d9\u05d4
 \u05d3\u05d0\u05dc\u05de\u05d4 \u05d1\u05e1\u05d3\u05e8\u05ea
 \u05e1\u05e8\u05d8\u05d9 \[[u]]05e9\u05d5\u05d3\u05d3\u05d9
 \u05d4\u05e7\u05d0\u05e8\u05d9\u05d1\u05d9\u05d9\u05dd.@iw;

 I highlighted in blue surrounded by two brackets the character which throw
 the exception.


 Step 1: Decide what the problem is.

 If you don't understand the syntax error, take the output and chop it down
 to a simple test case.

 Step 2: Fix it!

 Having found out why the syntax is broken, add code to fix it.

 Andy



 Best.

 Julien.


 2014-02-13 10:41 GMT+01:00 Andy Seaborne a...@apache.org:

  On 13/02/14 09:10, Julien Plu wrote:

  I changed a bit my code to add your advice but I still have an error :

 org.apache.jena.riot.RiotException: [line: 39, col: 467] Unknown char:
 \(92;0x005C)


 Problem with the conversion.

 Print out the converted string to see what the problem is.



  Here the new code :

 try {
 URL serviceURL = new URL(
 https://www.googleapis.com/freebase/v1/rdf/m/020c55;);
 URLConnection connection = serviceURL.openConnection();
 Model model = ModelFactory.createDefaultModel();
 BufferedReader bf = new BufferedReader(new
 InputStreamReader(connection.getInputStream()));
 String readline;
 StringBuilder sb = new StringBuilder();
 while ((readline = bf.readLine()) != null) {
 sb.append(readline.replaceAll(x, u00)+\n);
 }
 InputStream in = new ByteArrayInputStream(sb.
 toString().getBytes());


 BAD

 Never use getBytes() for web data.

 1/ Use a StringReader
 2/ If you must convert to bytes, set the charset to be UTF-8 (or
 ideally
 the charset for the ressponse).


  model.read(in, null, TTL);

   } catch (Exception ex) {
 ex.printStackTrace();
   }

 Best

 Julien.


 2014-02-12 19:58 GMT+01:00 Andy Seaborne a...@apache.org:

   On 12/02/14 13:21, Julien Plu wrote:


   Yes I saw my error to lately sorry for disturbing you for nothing :-(


 By the way I can't pass immediately the URL to the model because the
 Turtle
 provided by this URI (and all the others from Freebase) have unicode
 characters encoded with \x so it's not valid Turtle, it's why I try
 to
 translate (or convert) these characher in \u.

 But my method doesn't works, any idea of how to do this in Java ?


  Best I can see is to get as string, fixup in Java (string replace),
 then
 use a StringReader.  It's not too big.

 At a wild untested guess, replace all \x with \u00.

 You need to tell it the syntax is TTL but you'd need to do that
 anyway
 because the HTTP response is Content-Type: text/plain; charset=UTF-8

 HTTP/1.1 200 OK
 Expires: Wed, 12 Feb 2014 18:50:21 GMT
 Date: Wed, 12 Feb 2014 18:50:21 GMT
 Cache-Control: private, max-age=0, must-revalidate, no-transform
 ETag: 1CZZiDfFArqsKpzUgFQB2V9yilI/MW2d6bfo-oO8n5ovC7d5nFY2_AQ
 Content-Type: text/plain; charset=UTF-8
 X-Content-Type-Options: nosniff
 X-Frame-Options: SAMEORIGIN
 X-XSS-Protection: 1; mode=block
 Content-Length: 32404
 Server: GSE
 Alternate-Protocol: 443:quic

   Andy



   Best.


 Julien.


 2014-02-12 14:06 GMT+01:00 Rob Vesse rve...@dotnetrdf.org:

You are trying to read from the downloaded contents of the file
 directly

  which is not going to work.  The model.read() API takes in a name of
 a
 file/URI to read or it takes in an InputStream.

 Simply pass your input stream directly to the read() call, or even
 simpler
 pass your URI to the read() call and let Jena handle the HTTP request
 for
 you.

 Rob

 On 12/02/2014 12:28, Julien Plu julien.plu@redaction-
 developpez.com


  wrote:

Hi,


 In getting the Turtle RDF from this URI :
 https://www.googleapis.com/freebase/v1/rdf/m/020c55

 A RiotNotFoundException is thrown :

 org.apache.jena.riot.RiotNotFoundException: Not found: @prefix
 key: 
 http://rdf.freebase.com/key/.
 @prefix ns: http://rdf.freebase.com/ns/.
 @prefix owl: http://www.w3.org/2002/07/owl#.
 @prefix rdfs: http://www.w3.org/2000/01/rdf-schema#.
 @prefix xsd: http://www.w3.org/2001/XMLSchema#.
 .
 .
 at 

Re: How to solve RiotNotFoundException ?

[Chris_Dollin]

On Thursday, February 13, 2014 01:42:33 PM Andy Seaborne wrote:
 On 13/02/14 12:59, Julien Plu wrote:
  Ok I found, it was the  characters. But now there is another bad syntax
  which is for example :
  
  ns:type.object.key ns:authority.nndb.854$002F000160374;
  
  
  so problem come from the $002F which means certainly /, by what
  is-it possible to replace this ? Have I to recreate all the URI myself
  ?
 
 If you look in the Turtle spec, you'll see that (RDF 1.1) lots of
 characters are legal in prefix names though they may need to be escaped.
   Check it out.
 
 Your higher level decision is whether to correct the intention of the
 URIs or whether to keep the character published.
 
 Feeding all this back to the Freebase people would help.  They could fix
 the data.

It's their custom key-escape format

  http://wiki.freebase.com/wiki/Weblink  

Quite why it's escaped into their Turtle I don't know.

Chris

Re: How to solve RiotNotFoundException ?

[Julien Plu]

Ok, I will try to create a little class tool which try to do this job, and
send a mail to the mailing list to warm them of these issues.

Best.

Julien.


2014-02-13 15:38 GMT+01:00 Chris_Dollin ehog.he...@gmail.com:

 On Thursday, February 13, 2014 01:42:33 PM Andy Seaborne wrote:
  On 13/02/14 12:59, Julien Plu wrote:
   Ok I found, it was the  characters. But now there is another bad
 syntax
   which is for example :
  
   ns:type.object.key ns:authority.nndb.854$002F000160374;
  
  
   so problem come from the $002F which means certainly /, by what
   is-it possible to replace this ? Have I to recreate all the URI myself
   ?
 
  If you look in the Turtle spec, you'll see that (RDF 1.1) lots of
  characters are legal in prefix names though they may need to be escaped.
Check it out.
 
  Your higher level decision is whether to correct the intention of the
  URIs or whether to keep the character published.
 
  Feeding all this back to the Freebase people would help.  They could fix
  the data.

 It's their custom key-escape format

   http://wiki.freebase.com/wiki/Weblink

 Quite why it's escaped into their Turtle I don't know.

 Chris

How to solve RiotNotFoundException ?

[Julien Plu]

Hi,

In getting the Turtle RDF from this URI :
https://www.googleapis.com/freebase/v1/rdf/m/020c55

A RiotNotFoundException is thrown :

org.apache.jena.riot.RiotNotFoundException: Not found: @prefix key: 
http://rdf.freebase.com/key/.
@prefix ns: http://rdf.freebase.com/ns/.
@prefix owl: http://www.w3.org/2002/07/owl#.
@prefix rdfs: http://www.w3.org/2000/01/rdf-schema#.
@prefix xsd: http://www.w3.org/2001/XMLSchema#.
.
.
at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:831)
at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:813)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:684)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:208)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:181)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:119)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:110)
at
org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:77)
at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:259)
at freebase.Test.main(Test.java:61)

Here my code :

try {
  URL serviceURL = new URL(
https://www.googleapis.com/freebase/v1/rdf/m/020c55;);
  Model model = ModelFactory.createDefaultModel();
  BufferedReader in = new BufferedReader(new
InputStreamReader(serviceURL.openStream(), UTF-8));
  String readline;
  StringBuilder sb = new StringBuilder();
  while ((readline = in.readLine()) != null) {
  sb.append(readline+\n);
  }
  model.read(sb.toString(), TTL);
} catch (Exception ex) {
  ex.printStackTrace();
}

Any solution to solve this ?

Thanks in advance.

Best.

Julien.

Re: How to solve RiotNotFoundException ?

[Julien Plu]

Oops my bad I forgot to convert my String in InputStream :-(

Best.

Julien.


2014-02-12 13:28 GMT+01:00 Julien Plu julien@redaction-developpez.com:

 Hi,

 In getting the Turtle RDF from this URI :
 https://www.googleapis.com/freebase/v1/rdf/m/020c55

 A RiotNotFoundException is thrown :

 org.apache.jena.riot.RiotNotFoundException: Not found: @prefix key: 
 http://rdf.freebase.com/key/.
 @prefix ns: http://rdf.freebase.com/ns/.
 @prefix owl: http://www.w3.org/2002/07/owl#.
 @prefix rdfs: http://www.w3.org/2000/01/rdf-schema#.
 @prefix xsd: http://www.w3.org/2001/XMLSchema#.
 .
 .
 at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:831)
 at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:813)
 at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:684)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:208)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:181)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:119)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:110)
 at
 org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:77)
 at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:259)
 at freebase.Test.main(Test.java:61)

 Here my code :

 try {
   URL serviceURL = new URL(
 https://www.googleapis.com/freebase/v1/rdf/m/020c55;);
   Model model = ModelFactory.createDefaultModel();
   BufferedReader in = new BufferedReader(new
 InputStreamReader(serviceURL.openStream(), UTF-8));
   String readline;
   StringBuilder sb = new StringBuilder();
   while ((readline = in.readLine()) != null) {
   sb.append(readline+\n);
   }
   model.read(sb.toString(), TTL);
 } catch (Exception ex) {
   ex.printStackTrace();
 }

 Any solution to solve this ?

 Thanks in advance.

 Best.

 Julien.

Re: How to solve RiotNotFoundException ?

[Chris Dollin]

On Wednesday, February 12, 2014 01:28:29 PM Julien Plu wrote:
 Hi,
 
 In getting the Turtle RDF from this URI :
 https://www.googleapis.com/freebase/v1/rdf/m/020c55
 
 A RiotNotFoundException is thrown :
 
 org.apache.jena.riot.RiotNotFoundException: Not found: @prefix key: 
 http://rdf.freebase.com/key/.
 @prefix ns: http://rdf.freebase.com/ns/.
 @prefix owl: http://www.w3.org/2002/07/owl#.
 @prefix rdfs: http://www.w3.org/2000/01/rdf-schema#.
 @prefix xsd: http://www.w3.org/2001/XMLSchema#.
 .
 .
 at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:831)
 at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:813)
 at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:684)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:208)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:181)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:119)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:110)
 at
 org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:77)
 at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:259)
 at freebase.Test.main(Test.java:61)
 
 Here my code :
 
 try {
   URL serviceURL = new URL(
 https://www.googleapis.com/freebase/v1/rdf/m/020c55;);
   Model model = ModelFactory.createDefaultModel();
   BufferedReader in = new BufferedReader(new
 InputStreamReader(serviceURL.openStream(), UTF-8));
   String readline;
   StringBuilder sb = new StringBuilder();
   while ((readline = in.readLine()) != null) {
   sb.append(readline+\n);
   }
   model.read(sb.toString(), TTL);
 } catch (Exception ex) {
   ex.printStackTrace();
 }
 
 Any solution to solve this ?

The first argument to model.read is a filename or URL, but you've handed
it the complete contents of whatever's given by serviceURL.OpenStream,
which looks like Turtle to me.

Looks to me that all of your code above could be replaced by

Model model = 
RDFDataMgr.loadModel(https://www.googleapis.com/freebase/v1/rdf/m/020c55;);

Chris

-- 
Possibly you're not recalling some of his previous plans.  Zoe, /Firefly/

Epimorphics Ltd, http://www.epimorphics.com
Registered address: Court Lodge, 105 High Street, Portishead, Bristol BS20 6PT
Epimorphics Ltd. is a limited company registered in England (number 7016688)

Re: How to solve RiotNotFoundException ?

[Rob Vesse]

You are trying to read from the downloaded contents of the file directly
which is not going to work.  The model.read() API takes in a name of a
file/URI to read or it takes in an InputStream.

Simply pass your input stream directly to the read() call, or even simpler
pass your URI to the read() call and let Jena handle the HTTP request for
you.

Rob

On 12/02/2014 12:28, Julien Plu julien@redaction-developpez.com
wrote:

Hi,

In getting the Turtle RDF from this URI :
https://www.googleapis.com/freebase/v1/rdf/m/020c55

A RiotNotFoundException is thrown :

org.apache.jena.riot.RiotNotFoundException: Not found: @prefix key: 
http://rdf.freebase.com/key/.
@prefix ns: http://rdf.freebase.com/ns/.
@prefix owl: http://www.w3.org/2002/07/owl#.
@prefix rdfs: http://www.w3.org/2000/01/rdf-schema#.
@prefix xsd: http://www.w3.org/2001/XMLSchema#.
.
.
at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:831)
at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:813)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:684)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:208)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:181)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:119)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:110)
at
org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:77)
at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:259)
at freebase.Test.main(Test.java:61)

Here my code :

try {
  URL serviceURL = new URL(
https://www.googleapis.com/freebase/v1/rdf/m/020c55;);
  Model model = ModelFactory.createDefaultModel();
  BufferedReader in = new BufferedReader(new
InputStreamReader(serviceURL.openStream(), UTF-8));
  String readline;
  StringBuilder sb = new StringBuilder();
  while ((readline = in.readLine()) != null) {
  sb.append(readline+\n);
  }
  model.read(sb.toString(), TTL);
} catch (Exception ex) {
  ex.printStackTrace();
}

Any solution to solve this ?

Thanks in advance.

Best.

Julien.

Re: How to solve RiotNotFoundException ?

[Julien Plu]

Yes I saw my error to lately sorry for disturbing you for nothing :-(

By the way I can't pass immediately the URL to the model because the Turtle
provided by this URI (and all the others from Freebase) have unicode
characters encoded with \x so it's not valid Turtle, it's why I try to
translate (or convert) these characher in \u.

But my method doesn't works, any idea of how to do this in Java ?

Best.

Julien.


2014-02-12 14:06 GMT+01:00 Rob Vesse rve...@dotnetrdf.org:

 You are trying to read from the downloaded contents of the file directly
 which is not going to work.  The model.read() API takes in a name of a
 file/URI to read or it takes in an InputStream.

 Simply pass your input stream directly to the read() call, or even simpler
 pass your URI to the read() call and let Jena handle the HTTP request for
 you.

 Rob

 On 12/02/2014 12:28, Julien Plu julien@redaction-developpez.com
 wrote:

 Hi,
 
 In getting the Turtle RDF from this URI :
 https://www.googleapis.com/freebase/v1/rdf/m/020c55
 
 A RiotNotFoundException is thrown :
 
 org.apache.jena.riot.RiotNotFoundException: Not found: @prefix key: 
 http://rdf.freebase.com/key/.
 @prefix ns: http://rdf.freebase.com/ns/.
 @prefix owl: http://www.w3.org/2002/07/owl#.
 @prefix rdfs: http://www.w3.org/2000/01/rdf-schema#.
 @prefix xsd: http://www.w3.org/2001/XMLSchema#.
 .
 .
 at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:831)
 at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:813)
 at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:684)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:208)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:181)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:119)
 at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:110)
 at
 org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:77)
 at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:259)
 at freebase.Test.main(Test.java:61)
 
 Here my code :
 
 try {
   URL serviceURL = new URL(
 https://www.googleapis.com/freebase/v1/rdf/m/020c55;);
   Model model = ModelFactory.createDefaultModel();
   BufferedReader in = new BufferedReader(new
 InputStreamReader(serviceURL.openStream(), UTF-8));
   String readline;
   StringBuilder sb = new StringBuilder();
   while ((readline = in.readLine()) != null) {
   sb.append(readline+\n);
   }
   model.read(sb.toString(), TTL);
 } catch (Exception ex) {
   ex.printStackTrace();
 }
 
 Any solution to solve this ?
 
 Thanks in advance.
 
 Best.
 
 Julien.

Re: How to solve RiotNotFoundException ?

[Andy Seaborne]

On 12/02/14 13:21, Julien Plu wrote:

Yes I saw my error to lately sorry for disturbing you for nothing :-(

By the way I can't pass immediately the URL to the model because the Turtle
provided by this URI (and all the others from Freebase) have unicode
characters encoded with \x so it's not valid Turtle, it's why I try to
translate (or convert) these characher in \u.

But my method doesn't works, any idea of how to do this in Java ?


Best I can see is to get as string, fixup in Java (string replace), then 
use a StringReader.  It's not too big.


At a wild untested guess, replace all \x with \u00.

You need to tell it the syntax is TTL but you'd need to do that anyway 
because the HTTP response is Content-Type: text/plain; charset=UTF-8


  HTTP/1.1 200 OK
  Expires: Wed, 12 Feb 2014 18:50:21 GMT
  Date: Wed, 12 Feb 2014 18:50:21 GMT
  Cache-Control: private, max-age=0, must-revalidate, no-transform
  ETag: 1CZZiDfFArqsKpzUgFQB2V9yilI/MW2d6bfo-oO8n5ovC7d5nFY2_AQ
  Content-Type: text/plain; charset=UTF-8
  X-Content-Type-Options: nosniff
  X-Frame-Options: SAMEORIGIN
  X-XSS-Protection: 1; mode=block
  Content-Length: 32404
  Server: GSE
  Alternate-Protocol: 443:quic

Andy



Best.

Julien.


2014-02-12 14:06 GMT+01:00 Rob Vesse rve...@dotnetrdf.org:


You are trying to read from the downloaded contents of the file directly
which is not going to work.  The model.read() API takes in a name of a
file/URI to read or it takes in an InputStream.

Simply pass your input stream directly to the read() call, or even simpler
pass your URI to the read() call and let Jena handle the HTTP request for
you.

Rob

On 12/02/2014 12:28, Julien Plu julien@redaction-developpez.com
wrote:


Hi,

In getting the Turtle RDF from this URI :
https://www.googleapis.com/freebase/v1/rdf/m/020c55

A RiotNotFoundException is thrown :

org.apache.jena.riot.RiotNotFoundException: Not found: @prefix key: 
http://rdf.freebase.com/key/.
@prefix ns: http://rdf.freebase.com/ns/.
@prefix owl: http://www.w3.org/2002/07/owl#.
@prefix rdfs: http://www.w3.org/2000/01/rdf-schema#.
@prefix xsd: http://www.w3.org/2001/XMLSchema#.
.
.
at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:831)
at org.apache.jena.riot.RDFDataMgr.open(RDFDataMgr.java:813)
at org.apache.jena.riot.RDFDataMgr.parse(RDFDataMgr.java:684)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:208)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:181)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:119)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:110)
at
org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:77)
at com.hp.hpl.jena.rdf.model.impl.ModelCom.read(ModelCom.java:259)
at freebase.Test.main(Test.java:61)

Here my code :

try {
  URL serviceURL = new URL(
https://www.googleapis.com/freebase/v1/rdf/m/020c55;);
  Model model = ModelFactory.createDefaultModel();
  BufferedReader in = new BufferedReader(new
InputStreamReader(serviceURL.openStream(), UTF-8));
  String readline;
  StringBuilder sb = new StringBuilder();
  while ((readline = in.readLine()) != null) {
  sb.append(readline+\n);
  }
  model.read(sb.toString(), TTL);
} catch (Exception ex) {
  ex.printStackTrace();
}

Any solution to solve this ?

Thanks in advance.

Best.

Julien.