From 79044763216e9f307f0092cd76463a127876f0ca Mon Sep 17 00:00:00 2001
From: Marcel Otto <marcelotto@gmx.de>
Date: Sat, 10 Jun 2017 18:02:51 +0200
Subject: [PATCH] core: RDF.Vocabulary.Namespaces can be constructed from NQuad
 files

---
 lib/rdf/vocabulary_namespace.ex               |  9 +++++-
 test/data/vocab_ns_example.nq                 |  2 ++
 ...cab_ns_example2.nt => vocab_ns_example.nt} |  0
 test/unit/vocabulary_namespace_test.exs       | 28 ++++++++++++++-----
 4 files changed, 31 insertions(+), 8 deletions(-)
 create mode 100644 test/data/vocab_ns_example.nq
 rename test/data/{vocab_ns_example2.nt => vocab_ns_example.nt} (100%)

diff --git a/lib/rdf/vocabulary_namespace.ex b/lib/rdf/vocabulary_namespace.ex
index bc0eb7b..ced683f 100644
--- a/lib/rdf/vocabulary_namespace.ex
+++ b/lib/rdf/vocabulary_namespace.ex
@@ -462,7 +462,14 @@ defmodule RDF.Vocabulary.Namespace do
   end
 
   defp load_file(file) do
-    RDF.NTriples.read_file!(file)  # TODO: support other formats
+    # TODO: support other formats
+    cond do
+      String.ends_with?(file, ".nt") -> RDF.NTriples.read_file!(file)
+      String.ends_with?(file, ".nq") -> RDF.NQuads.read_file!(file)
+      true ->
+        raise ArgumentError,
+          "unsupported file type for #{file}: vocabulary namespaces can currently be created from NTriple and NQuad files"
+    end
   end
 
   defp rdf_data_env do
diff --git a/test/data/vocab_ns_example.nq b/test/data/vocab_ns_example.nq
new file mode 100644
index 0000000..a3d0256
--- /dev/null
+++ b/test/data/vocab_ns_example.nq
@@ -0,0 +1,2 @@
+<http://example.com/from_nquads/foo> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/1999/02/22-rdf-syntax-ns#Property> .
+<http://example.com/from_nquads/Bar> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2000/01/rdf-schema#Resource> <http://example.com/from_nquads/Graph>.
diff --git a/test/data/vocab_ns_example2.nt b/test/data/vocab_ns_example.nt
similarity index 100%
rename from test/data/vocab_ns_example2.nt
rename to test/data/vocab_ns_example.nt
diff --git a/test/unit/vocabulary_namespace_test.exs b/test/unit/vocabulary_namespace_test.exs
index 4f16891..1a1632f 100644
--- a/test/unit/vocabulary_namespace_test.exs
+++ b/test/unit/vocabulary_namespace_test.exs
@@ -35,7 +35,11 @@ defmodule RDF.Vocabulary.NamespaceTest do
 
     defvocab ExampleFromNTriplesFile,
       base_uri: "http://example.com/from_ntriples/",
-      file: "test/data/vocab_ns_example2.nt"
+      file: "test/data/vocab_ns_example.nt"
+
+    defvocab ExampleFromNQuadsFile,
+      base_uri: "http://example.com/from_nquads/",
+      file: "test/data/vocab_ns_example.nq"
 
     defvocab StrictExampleFromTerms,
       base_uri: "http://example.com/strict_from_terms#",
@@ -351,12 +355,22 @@ defmodule RDF.Vocabulary.NamespaceTest do
     assert RDF.uri(Example1.foo) in Example1.__uris__
     assert RDF.uri(Example1.Bar) in Example1.__uris__
 
-    alias TestNS.StrictExampleFromAliasedTerms, as: Example2
-    assert length(Example2.__uris__) == 4
-    assert RDF.uri(Example2.Term1) in Example2.__uris__
-    assert RDF.uri(Example2.term2) in Example2.__uris__
-    assert RDF.uri(Example2.Term3) in Example2.__uris__
-    assert RDF.uri(Example2.term4) in Example2.__uris__
+    alias TestNS.ExampleFromNTriplesFile, as: Example2
+    assert length(Example2.__uris__) == 2
+    assert RDF.uri(Example2.foo) in Example2.__uris__
+    assert RDF.uri(Example2.Bar) in Example2.__uris__
+
+    alias TestNS.ExampleFromNQuadsFile, as: Example3
+    assert length(Example3.__uris__) == 2
+    assert RDF.uri(Example3.foo) in Example3.__uris__
+    assert RDF.uri(Example3.Bar) in Example3.__uris__
+
+    alias TestNS.StrictExampleFromAliasedTerms, as: Example4
+    assert length(Example4.__uris__) == 4
+    assert RDF.uri(Example4.Term1) in Example4.__uris__
+    assert RDF.uri(Example4.term2) in Example4.__uris__
+    assert RDF.uri(Example4.Term3) in Example4.__uris__
+    assert RDF.uri(Example4.term4) in Example4.__uris__
   end