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.functions.bitwise;
  
  import org.apache.asterix.om.exceptions.ExceptionUtil;
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
  import org.apache.asterix.runtime.evaluators.functions.AbstractScalarEval;
  import org.apache.asterix.runtime.evaluators.functions.PointableHelper;
  import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
  import org.apache.hyracks.api.context.IEvaluatorContext;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.api.exceptions.SourceLocation;
  import org.apache.hyracks.data.std.api.IPointable;
  import org.apache.hyracks.data.std.primitive.VoidPointable;
  import org.apache.hyracks.data.std.util.ArrayBackedValueStorage;
  import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
  
  /**
   * This function receives one argument, representing the value. This evaluator is used by the Bitwise NOT and COUNT
   * functions.
   * This function can be applied only to int64 type numeric values.
   *
   * The function has the following behavior:
   * - If the argument is missing or null, then missing or null is returned, respectively.
   * - If the argument is int64, then int32 or int64 is returned, depending on the calling function.
   * - If the argument is float or double, then int32 or int64 or null is returned, depending on the argument value.
   * - If the argument is any other type, then null is returned.
   */
  
  abstract class AbstractBitSingleValueEvaluator extends AbstractScalarEval {
  
      // Result members
      final ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
  
      // Evaluators and Pointables
      private final IScalarEvaluator valueEvaluator;
      private final IPointable valuePointable = VoidPointable.FACTORY.createPointable();
  
      private final IEvaluatorContext context;
  
      AbstractBitSingleValueEvaluator(IEvaluatorContext context, IScalarEvaluatorFactory[] argEvaluatorFactories,
              FunctionIdentifier functionIdentifier, SourceLocation sourceLocation) throws HyracksDataException {
          super(sourceLocation, functionIdentifier);
  
          this.context = context;
  
          // Evaluator
          valueEvaluator = argEvaluatorFactories[0].createScalarEvaluator(context);
      }
  
      // Abstract methods
      abstract void applyBitwiseOperation(long value);
  
      abstract void writeResult(IPointable result) throws HyracksDataException;
  
      @Override
      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
          valueEvaluator.evaluate(tuple, valuePointable);
          if (PointableHelper.checkAndSetMissingOrNull(result, valuePointable)) {
              return;
          }
  
          byte[] bytes = valuePointable.getByteArray();
          int startOffset = valuePointable.getStartOffset();
  
          // Validity check
          if (!PointableHelper.isValidLongValue(bytes, startOffset, true)) {
              ExceptionUtil.warnTypeMismatch(context, srcLoc, funID, bytes[startOffset], 0, ATypeTag.BIGINT);
              PointableHelper.setNull(result);
              return;
          }
  
          long longValue = ATypeHierarchy.getLongValue(funID.getName(), 0, bytes, startOffset);
          applyBitwiseOperation(longValue);
  
          writeResult(result);
      }
  }
  