Examples with JsonLDWriteContext org.apache.jena.riot.JsonLDWriteContext used on opensource projects

Example 6 with JsonLDWriteContext

use of org.apache.jena.riot.JsonLDWriteContext in project jena by apache.

the class TestJsonLDWriter method testSubstitutingContext.

/**
     * Test using a context to compute the output, and replacing the @context with a given value
     */
@Test
public void testSubstitutingContext() {
    Model m = ModelFactory.createDefaultModel();
    String ns = "http://schema.org/";
    Resource person = m.createResource(ns + "Person");
    Resource s = m.createResource();
    m.add(s, m.createProperty(ns + "name"), "Jane Doe");
    m.add(s, m.createProperty(ns + "url"), "http://www.janedoe.com");
    m.add(s, m.createProperty(ns + "jobTitle"), "Professor");
    m.add(s, RDF.type, person);
    // change @context to a URI
    JsonLDWriteContext jenaCtx = new JsonLDWriteContext();
    jenaCtx.setJsonLDContextSubstitution((new JsonString(ns)).toString());
    String jsonld;
    jsonld = toString(m, RDFFormat.JSONLD_COMPACT_FLAT, jenaCtx);
    String c = "\"@context\":\"http://schema.org/\"";
    assertTrue(jsonld.contains(c));
    // change @context to a given ctx
    String ctx = "{\"jobTitle\":{\"@id\":\"http://ex.com/jobTitle\"},\"url\":{\"@id\":\"http://ex.com/url\"},\"name\":{\"@id\":\"http://ex.com/name\"}}";
    jenaCtx.setJsonLDContextSubstitution(ctx);
    jsonld = toString(m, RDFFormat.JSONLD_COMPACT_FLAT, jenaCtx);
    assertTrue(jsonld.contains("http://ex.com/name"));
}

Example 7 with JsonLDWriteContext

use of org.apache.jena.riot.JsonLDWriteContext in project jena by apache.

the class TestJsonLDWriter method testSettingContextAsJsonString.

/** verify that one may pass a context as a JSON string, and that it is actually used in the output */
@Test
public void testSettingContextAsJsonString() {
    // 1) get the context generated by default by jena
    // for a simple model with a prefix declaration
    // 2) remove prefix declaration from model,
    // output as jsonld is different
    // 3) output the model as jsonld using the context:
    // we should get the same output as in 1
    String ns = "http://www.a.com/foo/";
    Model m = simpleModel(ns);
    m.setNsPrefix("ex", ns);
    String s1 = toString(m, RDFFormat.JSONLD_COMPACT_FLAT, null);
    // there's a prefix in m, and we find it in the output
    String prefixStringInResult = "\"ex\":\"" + ns + "\"";
    assertTrue(s1.contains(prefixStringInResult));
    Model m1 = parse(s1);
    // this is the json object associated to "@context" in s1
    // it includes the "ex" prefix
    // String js = "{\"p\":{\"@id\":\"http://www.a.com/foo/p\",\"@type\":\"@id\"},\"ex\":\"http://www.a.com/foo/\"}";
    // constructing the js string ny hand:
    JsonObject obj = new JsonObject();
    obj.put("@id", ns + "p");
    obj.put("@type", "@id");
    JsonObject json = new JsonObject();
    json.put("p", obj);
    json.put("ex", ns);
    String js = json.toString();
    // remove the prefix from m
    m.removeNsPrefix("ex");
    String s2 = toString(m, RDFFormat.JSONLD_COMPACT_PRETTY, null);
    // model wo prefix -> no more prefix string in result:
    assertFalse(s2.contains(prefixStringInResult));
    // the model wo prefix, output as jsonld using a context that defines the prefix    
    JsonLDWriteContext jenaCtx = new JsonLDWriteContext();
    jenaCtx.setJsonLDContext(js);
    String s3 = toString(m, RDFFormat.JSONLD_COMPACT_FLAT, jenaCtx);
    assertTrue(s3.length() == s1.length());
    assertTrue(s3.contains(prefixStringInResult));
    Model m3 = parse(s3);
    assertTrue(m3.isIsomorphicWith(m));
    assertTrue(m3.isIsomorphicWith(m1));
    // to be noted: things also work if passing the "@context"
    js = "{\"@context\":" + js + "}";
    jenaCtx.setJsonLDContext(js);
    String s4 = toString(m, RDFFormat.JSONLD_COMPACT_FLAT, jenaCtx);
    assertTrue(s4.length() == s1.length());
    assertTrue(s4.contains(prefixStringInResult));
    Model m4 = parse(s4);
    assertTrue(m4.isIsomorphicWith(m));
    assertTrue(m4.isIsomorphicWith(m1));
}

Example 8 with JsonLDWriteContext

use of org.apache.jena.riot.JsonLDWriteContext in project jena by apache.

the class TestJsonLDWriter method jsonldOptions.

/** Test passing a JsonLdOptions through Context */
@Test
public final void jsonldOptions() {
    Model m = ModelFactory.createDefaultModel();
    String ns = "http://schema.org/";
    Resource s = m.createResource();
    m.add(s, m.createProperty(ns + "name"), "Jane Doe");
    m.add(s, m.createProperty(ns + "url"), "http://www.janedoe.com");
    m.add(s, m.createProperty(ns + "jobTitle"), "Professor");
    // our default uses true for compactArrays
    String jsonld = toString(m, RDFFormat.JSONLD, null);
    // compactArrays is true -> no "@graph"
    assertFalse(jsonld.contains("@graph"));
    // compactArrays is true -> string, not an array for props with one value
    assertTrue(jsonld.contains("\"jobTitle\" : \"Professor\""));
    // now output using a value for JsonLdOptions in Context that sets compactArrays to false
    JsonLDWriteContext jenaCtx = new JsonLDWriteContext();
    JsonLdOptions opts = new JsonLdOptions(null);
    opts.setCompactArrays(false);
    jenaCtx.setOptions(opts);
    jsonld = toString(m, RDFFormat.JSONLD, jenaCtx);
    // compactArrays is false -> a "@graph" node
    assertTrue(jsonld.contains("@graph"));
    // compactArrays is false -> an array for all props, even when there's only one value
    assertTrue(jsonld.contains("\"jobTitle\" : [ \"Professor\" ]"));
}