Fix TableMetadata.describe() when containing a vector column

patch by Stefan Miklosovic; reviewed by Bret McGuire for CASSJAVA-2

Author: smiklosovic

core/src/main/java/com/datastax/oss/driver/internal/core/type/DefaultVectorType.java

@@ -60,7 +60,7 @@ public String getClassName() {
   @NonNull
   @Override
   public String asCql(boolean includeFrozen, boolean pretty) {
-    return String.format("'%s(%d)'", getClassName(), getDimensions());
+    return String.format("vector<%s, %d>", getElementType().asCql(true, false), getDimensions());
   }
 
   /* ============== General class implementation ============== */

core/src/test/java/com/datastax/oss/driver/internal/core/metadata/schema/TableMetadataTest.java

@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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 com.datastax.oss.driver.internal.core.metadata.schema;
+
+import static com.datastax.oss.driver.api.core.CqlIdentifier.fromCql;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import com.datastax.oss.driver.api.core.metadata.schema.TableMetadata;
+import com.datastax.oss.driver.internal.core.type.DefaultVectorType;
+import com.datastax.oss.driver.internal.core.type.PrimitiveType;
+import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableMap;
+import com.datastax.oss.protocol.internal.ProtocolConstants.DataType;
+import com.google.common.collect.ImmutableList;
+import java.util.UUID;
+import org.junit.Test;
+
+public class TableMetadataTest {
+
+  /** Tests CASSJAVA-2 */
+  @Test
+  public void should_describe_table_with_vector_correctly() {
+    TableMetadata tableMetadata =
+        new DefaultTableMetadata(
+            fromCql("ks"),
+            fromCql("tb"),
+            UUID.randomUUID(),
+            false,
+            false,
+            ImmutableList.of(
+                new DefaultColumnMetadata(
+                    fromCql("ks"),
+                    fromCql("ks"),
+                    fromCql("tb"),
+                    new PrimitiveType(DataType.ASCII),
+                    false)),
+            ImmutableMap.of(),
+            ImmutableMap.of(
+                fromCql("a"),
+                new DefaultColumnMetadata(
+                    fromCql("ks"),
+                    fromCql("ks"),
+                    fromCql("tb"),
+                    new DefaultVectorType(new PrimitiveType(DataType.INT), 3),
+                    false)),
+            ImmutableMap.of(),
+            ImmutableMap.of());
+
+    String describe1 = tableMetadata.describe(true);
+
+    assertThat(describe1).contains("vector<int, 3>,");
+  }
+}