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.formats.nontagged;
  
  import java.io.Serializable;
  
  import org.apache.asterix.dataflow.data.nontagged.hash.AMurmurHash3BinaryHashFunctionFamily;
  import org.apache.asterix.om.types.IAType;
  import org.apache.hyracks.algebricks.data.IBinaryHashFunctionFamilyProvider;
  import org.apache.hyracks.api.dataflow.value.IBinaryHashFunctionFamily;
  
  /**
   * We use a binary hash function that promotes numeric types (tinyint,smallint,integer,bigint,float) to double.
   * Non-numeric types will be hashed without type promotion.
   */
  public class BinaryHashFunctionFamilyProvider implements IBinaryHashFunctionFamilyProvider, Serializable {
  
      private static final long serialVersionUID = 1L;
      public static final BinaryHashFunctionFamilyProvider INSTANCE = new BinaryHashFunctionFamilyProvider();
  
      private BinaryHashFunctionFamilyProvider() {
      }
  
      @Override
      public IBinaryHashFunctionFamily getBinaryHashFunctionFamily(Object type) {
          // AMurmurHash3BinaryHashFunctionFamily converts numeric type to double type before doing hash()
          return new AMurmurHash3BinaryHashFunctionFamily((IAType) type);
      }
  }
  