Comments (2)
It seems that your SubjectMap is not correct. You must use rr:BlankNode
as rr:termType
's object:
rr:subjectMap [
rr:column "Column_Name";
rr:termType rr:BlankNode;
rr:class giam:Entitlement
]
from rmlmapper-java.
Okay, I'm getting the same null pointer exception error.
I did some experimenting and it's being caused by attempting to add an rdf:comment
that's an empty string
Use sample data file stuff.json:
{
"stuff": [
{"id":"12345", "value":"hi"}
]
}
This will cause an exception:
17:09:30.580 [main] DEBUG b.u.rml.records.JSONRecordFactory .getRecords(40) - No document found for stuff.json. Creating new one
17:09:30.597 [main] DEBUG c.j.j.internal.path.CompiledPath .evaluate(93) - Evaluating path: $['stuff'][*]
17:09:30.600 [main] DEBUG c.j.j.internal.path.CompiledPath .evaluate(93) - Evaluating path: $['stuff'][0]['id']
17:09:30.601 [main] ERROR be.ugent.rml.cli.Main .run(420) - Cannot invoke "be.ugent.rml.functions.SingleRecordFunctionExecutor.execute(be.ugent.rml.records.Record)" because "this.functionExecutor" is null
17:09:30.601 [main] ERROR be.ugent.rml.cli.Main .run(457) - Cannot invoke "be.ugent.rml.functions.SingleRecordFunctionExecutor.execute(be.ugent.rml.records.Record)" because "this.functionExecutor" is null
java.lang.NullPointerException: Cannot invoke "be.ugent.rml.functions.SingleRecordFunctionExecutor.execute(be.ugent.rml.records.Record)" because "this.functionExecutor" is null
at be.ugent.rml.termgenerator.LiteralGenerator.generate(LiteralGenerator.java:47)
at be.ugent.rml.Executor.generatePredicateObjectGraphs(Executor.java:345)
at be.ugent.rml.Executor.executeWithFunction(Executor.java:178)
at be.ugent.rml.Executor.execute(Executor.java:132)
at be.ugent.rml.cli.Main.run(Main.java:416)
at be.ugent.rml.cli.Main.main(Main.java:49)
---
base: http://www.semanticweb.org/Broken#
prefixes:
instance: http://www.semanticweb.org/Broken#
rdfs: http://www.w3.org/2000/01/rdf-schema#
idlab-fn: http://example.com/idlab/function/
grel: http://users.ugent.be/~bjdmeest/function/grel.ttl#
sources:
stuff:
access: stuff.json
referenceFormulation: jsonpath
iterator: "$.stuff[*]"
mappings:
threats:
sources: stuff
subjects: instance:$(id)
predicateobjects:
- [rdf:comment, ""]
But, this will process just fine. Only difference is a single character.
---
base: http://www.semanticweb.org/Broken#
prefixes:
instance: http://www.semanticweb.org/Broken#
rdfs: http://www.w3.org/2000/01/rdf-schema#
idlab-fn: http://example.com/idlab/function/
grel: http://users.ugent.be/~bjdmeest/function/grel.ttl#
sources:
stuff:
access: stuff.json
referenceFormulation: jsonpath
iterator: "$.stuff[*]"
mappings:
threats:
sources: stuff
subjects: instance:$(id)
predicateobjects:
- [rdf:comment, " "]
from rmlmapper-java.
Related Issues (20)
- Example 3.1 from the RML Spec HOT 2
- README: Deduplication option only affects nquads and hdt serialization HOT 3
- Dependency resolution of rmlmapper 6.2.1 fails HOT 9
- Generating and IRI from an email address HOT 1
- Memory usage comparison between 6.2.1 and 6.0.0 HOT 1
- MethodNotFoundException: No suitable method 'lookup' ... HOT 5
- URL-encoded version of email address HOT 7
- Lookup function doesn't use correct datatype HOT 3
- Postgres, table with Float datatype = NULL gives exception HOT 4
- JSON: Join Condition on Array HOT 2
- Feature request: string replace function HOT 3
- Serialization format http://www.w3.org/ns/formats/TriG not implemented! HOT 2
- Unreproducible results for repeated XML `NUTS` elements with JSON vocabulary mapping
- Unreproducible results for type values from CSV vocabularies with empty first column HOT 5
- Repeated XML `NUTS` elements not creating mapping from JSON vocabulary HOT 3
- JSONL support HOT 1
- JSON parent/child mapping HOT 3
- Function composition in subject URI template HOT 7
- Hashing each object value HOT 3
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from rmlmapper-java.