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.carbondata.core.cache.dictionary;
  
  import java.util.Arrays;
  
  import org.apache.carbondata.core.util.ByteUtil;
  
  import net.jpountz.xxhash.XXHash32;
  
  /**
   * class that holds the byte array and overrides equals and hashcode method which
   * will be useful for object comparison
   */
  public class DictionaryByteArrayWrapper {
  
    /**
     * dictionary value as byte array
     */
    private byte[] data;
  
    /**
     * hashing algorithm to calculate hash code
     */
    private XXHash32 xxHash32;
  
    /**
     * @param data
     */
    public DictionaryByteArrayWrapper(byte[] data) {
      this.data = data;
    }
  
    /**
     * @param data
     * @param xxHash32
     */
    public DictionaryByteArrayWrapper(byte[] data, XXHash32 xxHash32) {
      this(data);
      this.xxHash32 = xxHash32;
    }
  
    /**
     * This method will compare 2 DictionaryByteArrayWrapper objects
     *
     * @param other
     * @return
     */
    @Override
    public boolean equals(Object other) {
      if (this == other) {
        return true;
      }
      if (other == null || getClass() != other.getClass()) {
        return false;
      }
      DictionaryByteArrayWrapper otherObjectToCompare = (DictionaryByteArrayWrapper) other;
      if (data.length != otherObjectToCompare.data.length) {
        return false;
      }
      return ByteUtil.UnsafeComparer.INSTANCE.equals(data, otherObjectToCompare.data);
  
    }
  
    /**
     * This method will calculate the hash code for given data
     *
     * @return
     */
    @Override
    public int hashCode() {
      if (null != xxHash32) {
        return xxHash32.hash(data, 0, data.length, 0);
      }
      int result = Arrays.hashCode(data);
      result = 31 * result;
      return result;
    }
  
    public byte[] getData() {
      return data;
    }
  }
  