Ported allPredicates()

egonw · Feb 18, 2024 · c7cade4 · c7cade4
1 parent 444eb84
commit c7cade4
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Showing 2 changed files with 30 additions and 3 deletions.
diff --git a/managers-semweb/managers-rdf/src/main/java/net/bioclipse/managers/RDFManager.java b/managers-semweb/managers-rdf/src/main/java/net/bioclipse/managers/RDFManager.java
@@ -130,8 +130,7 @@ public void addPrefix(IRDFStore store, String prefix, String namespace)
      * @param resourceURI  subject of the triples
      * @param predicate    predicate of the triples
      * @return             List of objects (resources and literals).
-     * @throws BioclipseException
-    */
+     */
     public List<String> getForPredicate(IRDFStore store, String resourceURI, String predicate) {
         StringMatrix results = sparql(store,
             "SELECT DISTINCT ?object WHERE {" +
@@ -701,4 +700,21 @@ public List<String> allClasses(IRDFStore store) throws BioclipseException {
         return results.getColumn("class");
     }
 
+    /**
+     * Lists all existing predicates.
+     *
+     * @param store    the {@link IRDFStore}
+     * @return         a {@link List} with all unique predicates
+     *
+     * @throws BioclipseException when the {@link IRDFStore} could not be queried
+     */
+    public List<String> allPredicates(IRDFStore store) throws BioclipseException {
+        StringMatrix results = sparql(store,
+            "SELECT DISTINCT ?predicate WHERE {" +
+            " [] ?predicate []" +
+            "}"
+        );
+        return results.getColumn("predicate");
+    }
+
 }
diff --git a/managers-semweb/managers-rdf/src/test/java/net/bioclipse/managers/RDFManagerTest.java b/managers-semweb/managers-rdf/src/test/java/net/bioclipse/managers/RDFManagerTest.java
@@ -446,11 +446,22 @@ public void allClasses() throws Exception {
         IRDFStore store = rdf.createInMemoryStore(true);
         store = rdf.importFile(store, "/RDFTests/classes.ttl", "TURTLE");
         List<String> classes = rdf.allClasses(store);
-        System.out.println(classes);
         assertNotNull(classes);
         assertNotSame(0, classes.size());
         for (String clazz : classes) {
             if (clazz.equals("https://example.org/ClassOne")) return;
         }
     }
+
+    @Test
+    public void allPredicates() throws Exception {
+        IRDFStore store = rdf.createInMemoryStore(true);
+        store = rdf.importFile(store, "/RDFTests/classes.ttl", "TURTLE");
+        List<String> classes = rdf.allClasses(store);
+        assertNotNull(classes);
+        assertNotSame(0, classes.size());
+        for (String clazz : classes) {
+            if (clazz.equals("http://www.w3.org/1999/02/22-rdf-syntax-ns#type")) return;
+        }
+    }
 }