diff --git a/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcAuthorizationProperties.java b/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcAuthorizationProperties.java
index 4d325c6812e..b13504fd2fd 100644
--- a/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcAuthorizationProperties.java
+++ b/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcAuthorizationProperties.java
@@ -29,17 +29,16 @@ public class JdbcAuthorizationProperties {
   public static final String JDBC_DRIVER = CONFIG_PREFIX + "driver";
 
   public static void validate(Map<String, String> properties) {
-    if (!properties.containsKey(JDBC_URL)) {
-      throw new IllegalArgumentException("JDBC URL is required");
-    }
-    if (!properties.containsKey(JDBC_USERNAME)) {
-      throw new IllegalArgumentException("JDBC username is required");
-    }
-    if (!properties.containsKey(JDBC_PASSWORD)) {
-      throw new IllegalArgumentException("JDBC password is required");
-    }
-    if (!properties.containsKey(JDBC_DRIVER)) {
-      throw new IllegalArgumentException("JDBC driver is required");
+    String errorMsg = "%s is required";
+    check(properties, JDBC_URL, errorMsg);
+    check(properties, JDBC_USERNAME, errorMsg);
+    check(properties, JDBC_PASSWORD, errorMsg);
+    check(properties, JDBC_DRIVER, errorMsg);
+  }
+
+  private static void check(Map<String, String> properties, String key, String errorMsg) {
+    if (!properties.containsKey(key) && properties.get(key) != null) {
+      throw new IllegalArgumentException(String.format(errorMsg, key));
     }
   }
 }
diff --git a/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcMetadataObject.java b/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcMetadataObject.java
index b813ba53772..f7a577aeaee 100644
--- a/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcMetadataObject.java
+++ b/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcMetadataObject.java
@@ -28,9 +28,9 @@ public class JdbcMetadataObject implements AuthorizationMetadataObject {
 
   private final String parent;
   private final String name;
-  private final MetadataObject.Type type;
+  private final Type type;
 
-  public JdbcMetadataObject(String parent, String name, MetadataObject.Type type) {
+  public JdbcMetadataObject(String parent, String name, Type type) {
     this.parent = parent;
     this.name = name;
     this.type = type;
@@ -54,7 +54,7 @@ public List<String> names() {
 
   @Override
   public Type type() {
-    return () -> type;
+    return type;
   }
 
   @Override
@@ -66,13 +66,38 @@ public void validateAuthorizationMetadataObject() throws IllegalArgumentExceptio
         names.size() <= 2, "The name of the object is not in the format of 'database.table'.");
     Preconditions.checkArgument(type != null, "The type of the object is null.");
     Preconditions.checkArgument(
-        names.size() == 1 || type == MetadataObject.Type.SCHEMA,
+        names.size() == 1 || type.metadataObjectType() == MetadataObject.Type.SCHEMA,
         "The type of the object is not SCHEMA.");
     Preconditions.checkArgument(
-        names.size() == 2 || type == MetadataObject.Type.TABLE,
+        names.size() == 2 || type.metadataObjectType() == MetadataObject.Type.TABLE,
         "The type of the object is not TABLE.");
     for (String name : names) {
       Preconditions.checkArgument(name != null, "Cannot create a metadata object with null name");
     }
   }
+
+  public enum Type implements AuthorizationMetadataObject.Type {
+    SCHEMA(MetadataObject.Type.SCHEMA),
+    TABLE(MetadataObject.Type.TABLE);
+
+    private final MetadataObject.Type metadataType;
+
+    Type(MetadataObject.Type type) {
+      this.metadataType = type;
+    }
+
+    public MetadataObject.Type metadataObjectType() {
+      return metadataType;
+    }
+
+    public static Type fromMetadataType(MetadataObject.Type metadataType) {
+      for (Type type : Type.values()) {
+        if (type.metadataObjectType() == metadataType) {
+          return type;
+        }
+      }
+      throw new IllegalArgumentException(
+          "No matching RangerMetadataObject.Type for " + metadataType);
+    }
+  }
 }
diff --git a/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcSecurableObject.java b/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcSecurableObject.java
index 70ce0e246ee..ab07fd2c2e1 100644
--- a/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcSecurableObject.java
+++ b/authorizations/authorization-jdbc/src/main/java/org/apache/gravitino/authorization/jdbc/JdbcSecurableObject.java
@@ -38,7 +38,7 @@ public class JdbcSecurableObject extends JdbcMetadataObject
   private JdbcSecurableObject(
       String parent,
       String name,
-      MetadataObject.Type type,
+      JdbcMetadataObject.Type type,
       List<AuthorizationPrivilege> privileges) {
     super(parent, name, type);
     this.privileges = privileges;
@@ -48,8 +48,10 @@ static JdbcSecurableObject create(
       String schema, String table, List<AuthorizationPrivilege> privileges) {
     String parent = table == null ? null : schema;
     String name = table == null ? schema : table;
-    MetadataObject.Type type =
-        table == null ? MetadataObject.Type.SCHEMA : MetadataObject.Type.TABLE;
+    JdbcMetadataObject.Type type =
+        table == null
+            ? JdbcMetadataObject.Type.fromMetadataType(MetadataObject.Type.SCHEMA)
+            : JdbcMetadataObject.Type.fromMetadataType(MetadataObject.Type.TABLE);
 
     return new JdbcSecurableObject(parent, name, type, privileges);
   }