HHH-10612 - Check for support of RefCursor in Java 8

hibernate-core/src/main/java/org/hibernate/engine/jdbc/cursor/internal/StandardRefCursorSupport.java

@@ -161,7 +161,7 @@ public class StandardRefCursorSupport implements RefCursorSupport {
 		// Standard JDBC REF_CURSOR support was not added until Java 8, so we need to use reflection to attempt to
 		// access these fields/methods...
 		try {
-			return (Boolean) meta.getClass().getMethod( "supportsRefCursors" ).invoke( null );
+			return (Boolean) meta.getClass().getMethod( "supportsRefCursors" ).invoke( meta );
 		}
 		catch (NoSuchMethodException e) {
 			log.trace( "JDBC DatabaseMetaData class does not define supportsRefCursors method..." );

hibernate-core/src/test/java/org/hibernate/engine/jdbc/cursor/internal/StandardRefCursorSupportTest.java

@@ -0,0 +1,40 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.engine.jdbc.cursor.internal;
+
+import java.sql.DatabaseMetaData;
+import java.sql.SQLException;
+
+import org.hibernate.testing.TestForIssue;
+import org.junit.Test;
+
+import org.mockito.Mockito;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Unit test of the {@link StandardRefCursorSupport} class.
+ *
+ * @author Daniel Heinrich
+ */
+@TestForIssue(jiraKey = "HHH-10612")
+public class StandardRefCursorSupportTest {
+
+    interface TestDatabaseMetaData extends DatabaseMetaData {
+        boolean supportsRefCursors() throws SQLException;
+    }
+
+    @Test
+    public void testSupportsRefCursorsAboveJava8() throws Exception {
+        TestDatabaseMetaData metaMock = Mockito.mock(TestDatabaseMetaData.class);
+        Mockito.when(metaMock.supportsRefCursors()).thenReturn(true);
+
+        boolean result = StandardRefCursorSupport.supportsRefCursors(metaMock);
+        assertThat(result, is(true));
+    }
+}