/*
 * 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.carbondata.core.carbon;

public enum ColumnarFormatVersion {
  V1((short)1),
  V2((short)2);

  private short version;
  ColumnarFormatVersion(short version) {
    this.version = version;
  }

  @Override
  public String toString() {
    return "ColumnarFormatV" + version;
  }

  public short number() {
    return version;
  }

  public static ColumnarFormatVersion valueOf(short version) {
    switch (version) {
      case 1:
        return V1;
      case 2:
        return V2;
      default:
        throw new IllegalArgumentException("invalid format version: " + version);
    }
  }
}

@@ -1253,43 +1253,323 @@
 ase 
-1:%0A        return V1;%0A      case 2:
+0:%0A        // before multiple reader support, for existing carbon file, it is version 1%0A        return V1;%0A      case 1:%0A        // after multiple reader support, user can write new file with version 1%0A        return V1;%0A      case 2:%0A        // after multiple reader support, user can write new file with version 2
 %0A   

Fix compatibility This closes #380