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.filter.iterable.evaluator;
  
  import java.util.List;
  
  import org.apache.asterix.column.filter.FilterAccessorProvider;
  import org.apache.asterix.column.filter.iterable.ColumnFilterEvaluatorContext;
  import org.apache.asterix.column.filter.iterable.IColumnIterableFilterEvaluator;
  import org.apache.asterix.column.filter.iterable.IColumnIterableFilterEvaluatorFactory;
  import org.apache.asterix.column.values.IColumnValuesReader;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  
  public class ColumnIterableFilterEvaluatorFactory implements IColumnIterableFilterEvaluatorFactory {
      private static final long serialVersionUID = 171140626152211361L;
      private final IScalarEvaluatorFactory evaluatorFactory;
  
      public ColumnIterableFilterEvaluatorFactory(IScalarEvaluatorFactory evaluatorFactory) {
          this.evaluatorFactory = evaluatorFactory;
      }
  
      @Override
      public IColumnIterableFilterEvaluator create(ColumnFilterEvaluatorContext context) throws HyracksDataException {
          IScalarEvaluator evaluator = evaluatorFactory.createScalarEvaluator(context);
          FilterAccessorProvider filterAccessorProvider = context.getFilterAccessorProvider();
          // Readers are populated by evaluatorFactory.createScalarEvaluator()
          List<IColumnValuesReader> readers = filterAccessorProvider.getFilterColumnReaders();
  
          if (readers.isEmpty()) {
              throw new NullPointerException("Readers are empty");
          }
  
          // Initialize column filter readers by including a primary key level reader
          filterAccessorProvider.initializeFilterReaders();
  
          if (readers.stream().anyMatch(IColumnValuesReader::isRepeated)) {
              return new ColumnarRepeatedIterableFilterEvaluator(evaluator, readers);
          }
          return new ColumnIterableFilterEvaluator(evaluator, readers);
      }
  }
  