Add a no-op AccessControlService (#355)

Resolves #354

core/api/src/main/java/org/trellisldp/api/NoopAccessControlService.java

@@ -0,0 +1,40 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.trellisldp.api;
+
+import static java.util.Arrays.asList;
+import static java.util.Collections.unmodifiableSet;
+import static java.util.stream.Collectors.toSet;
+import static org.trellisldp.api.TrellisUtils.getInstance;
+
+import java.util.Set;
+
+import org.apache.commons.rdf.api.IRI;
+import org.apache.commons.rdf.api.RDF;
+
+/**
+ * A no-op AccessControlService implementation.
+ */
+public class NoopAccessControlService implements AccessControlService {
+
+    private static final RDF rdf = getInstance();
+    private static final String URI = "http://www.w3.org/ns/auth/acl#";
+    private static final Set<IRI> modes = unmodifiableSet(asList("Control", "Read", "Write", "Append")
+            .stream().map(mode -> URI + mode).map(rdf::createIRI).collect(toSet()));
+
+    @Override
+    public Set<IRI> getAccessModes(final IRI identifier, final Session session) {
+        return modes;
+    }
+}

core/api/src/test/java/org/trellisldp/api/NoopAccessControlServiceTest.java

@@ -0,0 +1,45 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.trellisldp.api;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import org.apache.commons.rdf.api.IRI;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mock;
+import org.trellisldp.vocabulary.ACL;
+
+public class NoopAccessControlServiceTest {
+
+    @Mock
+    private Session mockSession;
+
+    @BeforeEach
+    public void setUp() {
+        initMocks(this);
+    }
+
+    @Test
+    public void testAccessControl() {
+        final IRI resource = TrellisUtils.getInstance().createIRI("trellis:data/resource");
+        final AccessControlService svc = new NoopAccessControlService();
+        assertTrue(svc.getAccessModes(resource, mockSession).contains(ACL.Control));
+        assertTrue(svc.getAccessModes(resource, mockSession).contains(ACL.Read));
+        assertTrue(svc.getAccessModes(resource, mockSession).contains(ACL.Write));
+        assertTrue(svc.getAccessModes(resource, mockSession).contains(ACL.Append));
+    }
+}