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.runtime.evaluators.visitors;
  
  import java.util.Arrays;
  
  import org.apache.asterix.dataflow.data.nontagged.comparators.ListItemBinaryComparatorFactory;
  import org.apache.asterix.dataflow.data.nontagged.hash.ListItemBinaryHashFunctionFactory;
  import org.apache.asterix.runtime.evaluators.functions.BinaryHashMap;
  import org.apache.hyracks.api.dataflow.value.IBinaryComparator;
  import org.apache.hyracks.api.dataflow.value.IBinaryHashFunction;
  import org.apache.hyracks.data.std.util.BinaryEntry;
  
  public class DeepEqualityVisitorHelper {
      // Default values
      public static final int TABLE_SIZE = 100;
      public static final int TABLE_FRAME_SIZE = 32768;
  
      private final ListItemBinaryHashFunctionFactory listItemBinaryHashFunctionFactory =
              ListItemBinaryHashFunctionFactory.INSTANCE;
      private final ListItemBinaryComparatorFactory listItemBinaryComparatorFactory =
              ListItemBinaryComparatorFactory.INSTANCE;
  
      private final IBinaryHashFunction putHashFunc = listItemBinaryHashFunctionFactory.createBinaryHashFunction();
      private final IBinaryHashFunction getHashFunc = listItemBinaryHashFunctionFactory.createBinaryHashFunction();
      private IBinaryComparator cmp = listItemBinaryComparatorFactory.createBinaryComparator();
      private BinaryHashMap hashMap = null;
  
      public BinaryHashMap initializeHashMap(BinaryEntry valEntry) {
          return initializeHashMap(0, 0, valEntry);
      }
  
      public BinaryHashMap initializeHashMap(int tableSize, int tableFrameSize, BinaryEntry valEntry) {
          if (tableFrameSize != 0 && tableSize != 0) {
              hashMap = new BinaryHashMap(tableSize, tableFrameSize, putHashFunc, getHashFunc, cmp);
          } else {
              hashMap = new BinaryHashMap(TABLE_SIZE, TABLE_FRAME_SIZE, putHashFunc, getHashFunc, cmp);
          }
  
          byte[] emptyValBuf = new byte[8];
          Arrays.fill(emptyValBuf, (byte) 0);
          valEntry.set(emptyValBuf, 0, 8);
          return hashMap;
      }
  
  }
  