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.arrow.memory.util.hash;
  
  import org.apache.arrow.memory.ArrowBuf;
  
  /**
   * Utility for calculating the hash code for a consecutive memory region. This class provides the
   * basic framework for efficiently calculating the hash code.
   *
   * <p>A default light-weight implementation is given in {@link SimpleHasher}.
   */
  public interface ArrowBufHasher {
  
    /**
     * Calculates the hash code for a memory region.
     *
     * @param address start address of the memory region.
     * @param length length of the memory region.
     * @return the hash code.
     */
    int hashCode(long address, long length);
  
    /**
     * Calculates the hash code for a memory region.
     *
     * @param buf the buffer for the memory region.
     * @param offset offset within the buffer for the memory region.
     * @param length length of the memory region.
     * @return the hash code.
     */
    int hashCode(ArrowBuf buf, long offset, long length);
  }
  