RussellSpitzer commented on code in PR #11620:
URL: https://github.com/apache/iceberg/pull/11620#discussion_r1852350086


##########
core/src/main/java/org/apache/iceberg/TableUtil.java:
##########
@@ -0,0 +1,59 @@
+/*
+ * 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 org.apache.iceberg;
+
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+
+public class TableUtil {
+  private TableUtil() {}
+
+  /**
+   * Returns the format version of the given table. Note that subclasses of 
{@link
+   * BaseMetadataTable} do not have a format version. The only exception to 
this is {@link
+   * PositionDeletesTable}, where the format version is fetched from the 
underlying table.
+   */
+  public static int formatVersion(Table table) {
+    Preconditions.checkArgument(null != table, "Invalid table: null");
+
+    // being able to read the format version from the PositionDeletesTable is 
mainly needed in
+    // SparkPositionDeletesRewrite when determining whether to rewrite V2 
position deletes to DVs
+    if (table instanceof BaseMetadataTable) {

Review Comment:
   One of the reasons I want scala is I really want to just enumerate cases 
here. I would recommend we just go through all of our cases narrower then 
broader if we have exceptions so
   ```java
   If (PositionDeleteTable)
     return format version 
   else if (MetaTable) {
     Sorry Brah
   }
   else if (HasTableOperations) {
      return format version
   }
   else {
    // Sorry Brah
   }
   ```
   Although I am curious why position delete table needs a format version?



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