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.common;
  
  import static org.apache.asterix.om.types.ATypeTag.VALUE_TYPE_MAPPING;
  
  import org.apache.asterix.om.base.AMutableInt32;
  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.om.types.hierachy.DoubleToInt32TypeConvertComputer;
  import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
  import org.apache.hyracks.api.context.IEvaluatorContext;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.api.exceptions.SourceLocation;
  
  import com.google.common.math.DoubleMath;
  
  /**
   * Utility methods for argument handling
   */
  public final class ArgumentUtils {
  
      public static final byte[] NUMERIC_TYPES = { ATypeTag.SERIALIZED_INT8_TYPE_TAG, ATypeTag.SERIALIZED_INT16_TYPE_TAG,
              ATypeTag.SERIALIZED_INT32_TYPE_TAG, ATypeTag.SERIALIZED_INT64_TYPE_TAG, ATypeTag.SERIALIZED_FLOAT_TYPE_TAG,
              ATypeTag.SERIALIZED_DOUBLE_TYPE_TAG };
      private static final DoubleToInt32TypeConvertComputer LAX_DOUBLE_TO_INT32 =
              DoubleToInt32TypeConvertComputer.getInstance(false);
  
      private ArgumentUtils() {
      }
  
      /**
       * Checks that {@code value} is of numeric type and a finite mathematical integer (i.e. no fractions) returning
       * true if it is and storing the integer value in {@code outInteger}. Otherwise, returns false and issues a
       * warning. If the integer value of {@code value} cannot fit in an int32, then {@link Integer#MAX_VALUE} or
       * {@link Integer#MIN_VALUE} is stored.
       *
       * @param value data to be checked
       * @param outInteger where the integer read from {@code value} will be stored
       */
      public static boolean setInteger(IEvaluatorContext ctx, SourceLocation sourceLoc, FunctionIdentifier funcID,
              int argIdx, byte[] value, int offset, AMutableInt32 outInteger) throws HyracksDataException {
          byte type = value[offset];
          if (ATypeHierarchy.getTypeDomain(VALUE_TYPE_MAPPING[type]) != ATypeHierarchy.Domain.NUMERIC) {
              ExceptionUtil.warnTypeMismatch(ctx, sourceLoc, funcID, type, argIdx, NUMERIC_TYPES);
              return false;
          }
          // deal with NaN, +/-INF
          double doubleValue = ATypeHierarchy.getDoubleValue(funcID.getName(), argIdx, value, offset);
          if (!DoubleMath.isMathematicalInteger(doubleValue)) {
              ExceptionUtil.warnNonInteger(ctx, sourceLoc, funcID, argIdx, doubleValue);
              return false;
          }
          outInteger.setValue(LAX_DOUBLE_TO_INT32.convert(doubleValue));
          return true;
      }
  }
  