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Posted to users@jena.apache.org by elio hbeich <el...@gmail.com> on 2018/09/21 09:28:32 UTC
java.lang.NullPointerException: InputStream is null
Hey,
I am trying to read an inputStream but i get the following error:
source code:
InputStream it =
FileManager.get().open("C:/Users/Toshiba/AndroidStudioProjects/MyApplicationapp/app/sampledata/MallOntology.owl")
;
Model model = ModelFactory.createDefaultModel();
model.read(it, "");
error:
Process: com.example.toshiba.myapplication, PID: 7055
java.lang.NullPointerException: InputStream is null
at java.util.Objects.requireNonNull(Objects.java:228)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:266)
at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:254)
at org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:69)
at org.apache.jena.rdf.model.impl.ModelCom.read(ModelCom.java:275)
at com.example.toshiba.myapplication.MainActivity$3.onCompleted(MainActivity.java:255)
at com.facebook.GraphRequest$1.onCompleted(GraphRequest.java:301)
at com.facebook.GraphRequest$5.run(GraphRequest.java:1380)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Any advice
Best Regards
Re: java.lang.NullPointerException: InputStream is null
Posted by Andy Seaborne <an...@apache.org>.
The file does not exist.
(specifically, the file manager can't find it - one place it looks is
on-disk)
Andy
On 21/09/18 10:28, elio hbeich wrote:
> Hey,
>
>
> I am trying to read an inputStream but i get the following error:
>
> source code:
>
> InputStream it =
> FileManager.get().open("C:/Users/Toshiba/AndroidStudioProjects/MyApplicationapp/app/sampledata/MallOntology.owl")
That is not the name you showed last time.
Then
"MyApplication"
now
"MyApplicationapp"
> ;
>
> Model model = ModelFactory.createDefaultModel();
> model.read(it, "");
>
> error:
>
> Process: com.example.toshiba.myapplication, PID: 7055
> java.lang.NullPointerException: InputStream is null
> at java.util.Objects.requireNonNull(Objects.java:228)
> at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:266)
> at org.apache.jena.riot.RDFDataMgr.read(RDFDataMgr.java:254)
> at org.apache.jena.riot.adapters.RDFReaderRIOT.read(RDFReaderRIOT.java:69)
> at org.apache.jena.rdf.model.impl.ModelCom.read(ModelCom.java:275)
> at com.example.toshiba.myapplication.MainActivity$3.onCompleted(MainActivity.java:255)
> at com.facebook.GraphRequest$1.onCompleted(GraphRequest.java:301)
> at com.facebook.GraphRequest$5.run(GraphRequest.java:1380)
> at android.os.Handler.handleCallback(Handler.java:790)
> at android.os.Handler.dispatchMessage(Handler.java:99)
> at android.os.Looper.loop(Looper.java:164)
> at android.app.ActivityThread.main(ActivityThread.java:6494)
> at java.lang.reflect.Method.invoke(Native Method)
> at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
> at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
>
>
> Any advice
>
> Best Regards
>