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.accessor;
  
  import org.apache.asterix.column.assembler.value.IValueGetter;
  import org.apache.asterix.column.values.IColumnValuesReader;
  import org.apache.asterix.runtime.evaluators.functions.PointableHelper;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.data.std.api.IPointable;
  import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
  
  public class ColumnFilterValueAccessorEvaluator implements IScalarEvaluator {
      private final IColumnValuesReader reader;
      private final IValueGetter getter;
  
      public ColumnFilterValueAccessorEvaluator(IColumnValuesReader reader, IValueGetter getter) {
          this.reader = reader;
          this.getter = getter;
      }
  
      @Override
      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
          if (reader.isRepeated() && !reader.isRepeatedValue() || reader.isMissing()) {
              PointableHelper.setMissing(result);
          } else if (reader.isNull()) {
              PointableHelper.setNull(result);
          } else {
              result.set(getter.getValue(reader));
          }
      }
  }
  