java.net.URI is not perfect and it is also a mixture of RFC2396, RFC3896
and some pragmatics.
Jena's own jena-iri gets it right.
// NB The argument order can catch you out.
IRI iri = IRIResolver.resolve("picture.jpg", "http://mysite.net"; );
System.out.println(iri);
but jsonld-java uses java.net.URI.
Erich - please could you raise an issue with jsonld-java?
Andy
Or https://github.com/afs/iri4ld
On 04/03/2020 16:57, Erich Bremer wrote:
Thanks for the reference Martynas! According to the section referenced,
the following two URLs are equivalent.
http://example.com
http://example.com/
I can modify my own code to do the check and fix it for myself, but I
would think URI.resolve should treat them as equivalents and not
mindlessly concatenate them. How the jsonld-java people or the Jena
community, which uses jsonld-java, will have to make the call on how
to handle it. - Erich
On Wed, Mar 4, 2020 at 11:24 AM Martynas Jusevičius <marty...@atomgraph.com>
wrote:
URI.resolve() will not assume anything.
Base URI normally ends with a /. Don’t know if this is the best reference,
but close:
https://tools.ietf.org/html/rfc3986#section-6.2.3
You need to check the URI RFC and its resolution algorithm.
On Wed, 4 Mar 2020 at 16.57, Erich Bremer <er...@ebremer.com> wrote:
This also works:
URI uri = new URI("http://mysite.net";);
System.out.println(uri.resolve("/picture.jpg"));
but if no trailing "/" and no leading "/" on path will yield the
concatenated http://mysite.netpicture.jpg which then gets tossed and a
blank node is formed.
Should URI.resolve assume a "/" if no trailing nor leading "/" is
present?
- Erich
On Wed, Mar 4, 2020 at 10:52 AM Erich Bremer <er...@ebremer.com> wrote:
The program works if I specify the base with a trailing slash as "
http://mysite.net/";
I ran through the code and the problem appears to be here:
https://github.com/jsonld-java/jsonld-java/blob/66012db2f53b009cedeae50c83b5594b9dd05e11/core/src/main/java/com/github/jsonldjava/utils/JsonLdUrl.java#L283
In the short code segment here, you can see:
URI uri = new URI("http://mysite.net";);
System.out.println(uri.resolve("picture.jpg"));
Output:
http://mysite.netpicture.jpg
On Wed, Mar 4, 2020 at 10:05 AM Erich Bremer <er...@ebremer.com>
wrote:
Same thing:
Source JSONLD
{
"@context": [
"http://schema.org";
],
"@graph": [
{
"@type": "CreativeWork",
"@id": "picture.jpg"
},
{
"@id": "./",
"@type": "DataSet"
}
]
}
AFTER loading
============================================================
Base : http://mysite.net
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for
further details.
[ {
"@type" : [ "http://schema.org/CreativeWork"; ]
}, {
"@id" : "http://mysite.net";,
"@type" : [ "http://schema.org/DataSet"; ]
} ]
CODE ====================================
package com.mycompany.tesjsonld;
import com.github.jsonldjava.core.JsonLdOptions;
import com.github.jsonldjava.core.JsonLdProcessor;
import com.github.jsonldjava.utils.JsonUtils;
import java.io.ByteArrayInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
/**
*
* @author erich
*/
public class tryme {
public static void main(String[] args) throws
FileNotFoundException,
IOException {
String json = "{\n" +
" \"@context\": [\n" +
" \"http://schema.org\"\n"; +
" ],\n" +
" \"@graph\": [\n" +
" {\n" +
" \"@type\": \"CreativeWork\",\n" +
" \"@id\": \"picture.jpg\"\n" +
" },\n" +
" {\n" +
" \"@id\": \"./\",\n" +
" \"@type\": \"DataSet\"\n" +
" }\n" +
" ]\n" +
"}";
System.out.println(json);
System.out.println("============================================================");
InputStream inputStream = new
ByteArrayInputStream(json.getBytes(Charset.forName("UTF-8")));
Object jsonObject = JsonUtils.fromInputStream(inputStream);
JsonLdOptions options = new JsonLdOptions("http://mysite.net
");
System.out.println("Base : "+options.getBase());
//Object compact = JsonLdProcessor.compact(jsonObject, null,
options);
Object compact = JsonLdProcessor.expand(jsonObject, options);
System.out.println(JsonUtils.toPrettyString(compact));
}
}
On Wed, Mar 4, 2020 at 9:44 AM Erich Bremer <er...@ebremer.com>
wrote:
I will try with the other library to check.
On Wed, Mar 4, 2020 at 4:29 AM Rob Vesse <rve...@dotnetrdf.org>
wrote:
This may be an upstream bug or it could be a bug in how we configure
the underlying parser
Jena's JSON-LD support is based upon the
https://github.com/jsonld-java/jsonld-java library so you could try
and reproduce your test case just using their library directly which
would
determine if it is their bug or our bug
Rob
On 04/03/2020, 00:11, "Erich Bremer" <er...@ebremer.com> wrote:
I'm trying to use a "@id": "./" in a jsonld file and in another
triple
"@id": "picture.jpg". The "./" will be correctly changed to the
base URL,
but the "@id": "picture.jpg" just gets dropped and a blank node
is
created. Below is the code segment that I used to generate this
output:
{
"@context": [
"http://schema.org";
],
"@graph": [
{
"@type": "CreativeWork",
"@id": "picture.jpg"
},
{
"@id": "./",
"@type": "DataSet"
}
]
}
_:Bd42dbcf4e4ffb76e199766bf5e4c1e4b <
http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
http://schema.org/CreativeWork> .
<http://mydomain.com> <
http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
http://schema.org/DataSet> .
If I use https://json-ld.org/playground/ on the same jsonld, I
get:
<https://json-ld.org/playground/> <
http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
http://schema.org/DataSet>
.
<https://json-ld.org/playground/picture.jpg> <
http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <
http://schema.org/CreativeWork> .
which is what I expected. Am I missing something here? - Erich
String json = "{\n" +
" \"@context\": [\n" +
" \"http://schema.org\"\n"; +
" ],\n" +
" \"@graph\": [\n" +
" {\n" +
" \"@type\": \"CreativeWork\",\n" +
" \"@id\": \"picture.jpg\"\n" +
" },\n" +
" {\n" +
" \"@id\": \"./\",\n" +
" \"@type\": \"DataSet\"\n" +
" }\n" +
" ]\n" +
"}";
System.out.println(json);
Model m = ModelFactory.createDefaultModel();
InputStream inputStream = new
ByteArrayInputStream(json.getBytes(Charset.forName("UTF-8")));
RDFParser.create()
.base("http://mydomain.com";)
.source(inputStream)
.lang(RDFLanguages.JSONLD)
.parse(m);
RDFDataMgr.write(System.out, m, RDFFormat.NQUADS) ;
