content: /*
   * 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.asterix.column.util;
  
  import org.apache.asterix.om.types.ATypeTag;
  
  public class ColumnValuesUtil {
      private ColumnValuesUtil() {
      }
  
      public static int getBitWidth(int level) {
          //+1 for the null bit
          return (32 - Integer.numberOfLeadingZeros(level)) + 1;
      }
  
      public static int getNullMask(int level) {
          return 1 << getBitWidth(level) - 1;
      }
  
      public static boolean isNull(int mask, int level) {
          return (mask & level) == mask;
      }
  
      public static int getChildValue(int parentMask, int childMask, int level) {
          if (isNull(parentMask, level)) {
              return clearNullBit(parentMask, level) | childMask;
          }
          return level;
      }
  
      public static int clearNullBit(int nullBitMask, int level) {
          return (nullBitMask - 1) & level;
      }
  
      public static ATypeTag getNormalizedTypeTag(ATypeTag typeTag) {
          switch (typeTag) {
              case TINYINT:
              case SMALLINT:
              case INTEGER:
                  return ATypeTag.BIGINT;
              default:
                  return typeTag;
          }
      }
  }
  