[jira] [Created] (JENA-1176) JSON-LD @context parsing fails due to outdated HTTPClient

[Stian Soiland-Reyes (JIRA)]

Stian Soiland-Reyes created JENA-1176:
-----------------------------------------

             Summary: JSON-LD @context parsing fails due to outdated HTTPClient
                 Key: JENA-1176
                 URL: https://issues.apache.org/jira/browse/JENA-1176
             Project: Apache Jena
          Issue Type: Bug
            Reporter: Stian Soiland-Reyes
            Priority: Blocker
             Fix For: Jena 3.1.0


Raised by 
[Francois|http://mail-archives.apache.org/mod_mbox/jena-dev/201605.mbox/%3CB51A2FF9-23E8-460B-913D-43BAB7A07E29%40gmail.com%3E]:

{code}
public class TestJsonLDReader {

        @Test public final void test() {
                String jsonld = 
"{\"@id\":\"_:b0\",\"@type\":\"http://schema.org/Person\",\"name\":\"John
Doe\",\"@context\":\"http://schema.org/\"}";;
                StringReader reader = new StringReader(jsonld);
                Model m = ModelFactory.createDefaultModel();
                m.read(reader, null, "JSON-LD");
                m.write(System.out, "TURTLE");
        }
}
{code}

Fails with:

{code}

java.lang.NoSuchMethodError: 
org.apache.http.impl.client.cache.CacheConfig.custom()Lorg/apache/http/impl/client/cache/CacheConfig$Builder;
        at 
com.github.jsonldjava.utils.JsonUtils.createDefaultHttpClient(JsonUtils.java:333)
        at 
com.github.jsonldjava.utils.JsonUtils.getDefaultHttpClient(JsonUtils.java:323)
        at 
com.github.jsonldjava.core.DocumentLoader.getHttpClient(DocumentLoader.java:84)
        at 
com.github.jsonldjava.core.DocumentLoader.fromURL(DocumentLoader.java:59)
        at 
com.github.jsonldjava.core.DocumentLoader.loadDocument(DocumentLoader.java:29)
        at com.github.jsonldjava.core.Context.parse(Context.java:169)
        at com.github.jsonldjava.core.Context.parse(Context.java:252)
        at com.github.jsonldjava.core.JsonLdApi.expand(JsonLdApi.java:534)
        at com.github.jsonldjava.core.JsonLdApi.expand(JsonLdApi.java:981)
        at 
com.github.jsonldjava.core.JsonLdProcessor.expand(JsonLdProcessor.java:146)
        at 
com.github.jsonldjava.core.JsonLdProcessor.toRDF(JsonLdProcessor.java:482)
        at org.apache.jena.riot.lang.JsonLDReader.read$(JsonLDReader.java:143)
        at org.apache.jena.riot.lang.JsonLDReader.read(JsonLDReader.java:64)
{code}

This is caused by a newer [JSONLD-Java 
0.8.2|https://github.com/jsonld-java/jsonld-java/blob/v0.8.2/pom.xml#L42] now 
depending on 

{code:xml}
                <httpclient.version>4.5.1</httpclient.version>
                <httpcore.version>4.4.4</httpcore.version>
{code} 

while we explicitly depend on a much older version:

{code:xml}
    <!-- These are connected because solr4j depends on httpclient as well -->
    <ver.httpclient>4.2.6</ver.httpclient>
    <ver.httpcore>4.2.5</ver.httpcore>
{code}

Issue JENA-576 discusses why HTTPClient was not upgraded.

I suggest we try again to upgrade HTTPClient, even if this means also a newer 
Solr. 

A workaround would be to have an initialization to set 
JsonUtils.setDefaultClient() with our own instance - however that would break 
JSON-LD [Context JAR 
caching|https://github.com/jsonld-java/jsonld-java#loading-contexts-from-classpathjar]
 which I know we use in Taverna to avoid network traffic.

As JSON-LD with external @context - e.g. with schema.org,  is the primary way 
to use JSON-LD, then I think this should be a blocker for 3.1.0



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)