jsonld BlankNodes

linkeddata · Dec 2, 2022 · 17052b6 · 17052b6
1 parent c8cf530
commit 17052b6
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Showing 2 changed files with 78 additions and 4 deletions.
diff --git a/src/jsonldparser.js b/src/jsonldparser.js
@@ -22,7 +22,7 @@ export function jsonldObjectToTerm (kb, obj) {
   }
 
   if (Object.prototype.hasOwnProperty.call(obj, '@id')) {
-    return kb.rdfFactory.namedNode(obj['@id'])
+    return nodeType(kb, obj)
   }
 
   if (Object.prototype.hasOwnProperty.call(obj, '@language')) {
@@ -44,7 +44,7 @@ export function jsonldObjectToTerm (kb, obj) {
  * Adds the statements in a json-ld list object to {kb}.
  */
 function listToStatements (kb, obj) {
-  const listId = obj['@id'] ? kb.rdfFactory.namedNode(obj['@id']) : kb.rdfFactory.blankNode()
+  const listId = obj['@id'] ? nodeType(kb, obj) : kb.rdfFactory.blankNode()
 
   const items = obj['@list'].map((listItem => jsonldObjectToTerm(kb, listItem)))
   const statements = arrayToStatements(kb.rdfFactory, listId, items)
@@ -82,10 +82,19 @@ export default function jsonldParser (str, kb, base, callback) {
     .catch(callback)
 }
 
+function nodeType (kb, obj) {
+  if (obj['@id'].startsWith('_:')) {
+    // This object is a Blank Node.. pass the id without the preceding _:
+    return kb.rdfFactory.blankNode(obj['@id'].substring(2));
+  } else {
+    // This object is a Named Node
+    return kb.rdfFactory.namedNode(obj['@id']);
+  }
+}
 
 function processResource(kb, base, flatResource) {
   const id = flatResource['@id']
-    ? kb.rdfFactory.namedNode(flatResource['@id'])
+    ? nodeType(kb, flatResource)
     : kb.rdfFactory.blankNode()
 
   for (const property of Object.keys(flatResource)) {

diff --git a/tests/unit/parse-test.js b/tests/unit/parse-test.js
@@ -5,6 +5,7 @@ import parse from '../../src/parse'
 import CanonicalDataFactory from '../../src/factories/canonical-data-factory'
 import defaultXSD from '../../src/xsd'
 import DataFactory from '../../src/factories/rdflib-data-factory'
+import serialize from '../../src/serialize'
 
 describe('Parse', () => {
   describe('ttl', () => {
@@ -231,7 +232,71 @@ describe('Parse', () => {
       })
     })
 
-    describe('with a @type node', () => {
+    describe('jsonld with blanknodes', () => {
+      let store
+      before(done => {
+        const base = 'https://www.example.org/abc/def'
+        const mimeType = 'application/ld+json'
+        const content = `
+        {
+          "@context": {
+              "ex": "http://example.com#"
+          },
+          "@id": "ex:myid",
+          "ex:prop1": {
+              "ex:prop2": {
+                  "ex:prop3": "value"
+              }
+          }
+        }`
+        store = DataFactory.graph()
+        parse(content, store, base, mimeType, done)
+      })
+
+      it('store contains 3 statements', () => {
+        expect(store.statements).to.have.length(3)
+        // console.log(serialize(null, store, null, 'text/turtle'))
+        expect(serialize(null, store, null, 'text/turtle')).to.eql(`@prefix ex: <http://example.com#>.
+
+ex:myid ex:prop1 [ ex:prop2 [ ex:prop3 "value" ] ].
+
+`)
+        const nt = store.toNT()
+        expect(nt).to.include('<http://example.com#myid> <http://example.com#prop1> _:b0 .')
+        expect(nt).to.include('_:b0 <http://example.com#prop2> _:b1 .')
+        expect(nt).to.include('_:b1 <http://example.com#prop3> "value" .')
+      });
+    })
+
+    describe('ttl with blanknodes', () => {
+      let store
+      before(done => {
+        const base = 'https://www.example.org/abc/def'
+        const mimeType = 'text/turtle'
+        const content = `
+        @prefix : <#>.
+        @prefix ex: <http://example.com#>.
+
+        ex:myid ex:prop1 _:b0.
+        _:b0 ex:prop2 _:b1.
+        _:b1 ex:prop3 "value".
+        `
+        store = DataFactory.graph()
+        parse(content, store, base, mimeType, done)
+      })
+
+      it('store contains 3 statements', () => {
+        expect(store.statements).to.have.length(3)
+        // console.log(serialize(null, store, null, 'application/json+ld'))
+        expect(serialize(null, store, null, 'text/turtle')).to.eql(`@prefix ex: <http://example.com#>.
+
+ex:myid ex:prop1 [ ex:prop2 [ ex:prop3 "value" ] ].
+
+`)
+      });
+    })
+
+     describe('with a @type node', () => {
       const content = `
         {
           "@id": "jane",