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;
  
  import java.io.DataOutput;
  
  import org.apache.asterix.common.annotations.MissingNullInOutFunction;
  import org.apache.asterix.dataflow.data.nontagged.serde.ABooleanSerializerDeserializer;
  import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
  import org.apache.asterix.om.base.ADouble;
  import org.apache.asterix.om.base.AInt64;
  import org.apache.asterix.om.base.AMutableDouble;
  import org.apache.asterix.om.base.AMutableInt64;
  import org.apache.asterix.om.functions.BuiltinFunctions;
  import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.asterix.om.types.BuiltinType;
  import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
  import org.apache.asterix.runtime.evaluators.common.NumberUtils;
  import org.apache.asterix.runtime.exceptions.TypeMismatchException;
  import org.apache.commons.lang3.mutable.MutableBoolean;
  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.dataflow.value.ISerializerDeserializer;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.data.std.api.IPointable;
  import org.apache.hyracks.data.std.primitive.UTF8StringPointable;
  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;
  
  @MissingNullInOutFunction
  public class ToNumberDescriptor extends AbstractScalarFunctionDynamicDescriptor {
      private static final long serialVersionUID = 1L;
      public static final IFunctionDescriptorFactory FACTORY = ToNumberDescriptor::new;
  
      @Override
      public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
          return new IScalarEvaluatorFactory() {
              private static final long serialVersionUID = 1L;
  
              @Override
              public IScalarEvaluator createScalarEvaluator(final IEvaluatorContext ctx) throws HyracksDataException {
  
                  final IScalarEvaluator inputEval = args[0].createScalarEvaluator(ctx);
                  final IPointable inputArg = new VoidPointable();
                  final ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
                  final DataOutput out = resultStorage.getDataOutput();
                  final AMutableInt64 aInt64 = new AMutableInt64(0);
                  final AMutableDouble aDouble = new AMutableDouble(0);
                  final UTF8StringPointable utf8Ptr = new UTF8StringPointable();
                  final MutableBoolean maybeNumeric = new MutableBoolean();
  
                  @SuppressWarnings("unchecked")
                  final ISerializerDeserializer<AInt64> INT64_SERDE =
                          SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT64);
  
                  @SuppressWarnings("unchecked")
                  final ISerializerDeserializer<ADouble> DOUBLE_SERDE =
                          SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ADOUBLE);
  
                  return new IScalarEvaluator() {
                      @Override
                      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                          inputEval.evaluate(tuple, inputArg);
                          resultStorage.reset();
  
                          if (PointableHelper.checkAndSetMissingOrNull(result, inputArg)) {
                              return;
                          }
  
                          byte[] bytes = inputArg.getByteArray();
                          int startOffset = inputArg.getStartOffset();
                          ATypeTag tt = ATypeTag.VALUE_TYPE_MAPPING[bytes[startOffset]];
                          switch (tt) {
                              case TINYINT:
                              case SMALLINT:
                              case INTEGER:
                              case BIGINT:
                              case FLOAT:
                              case DOUBLE:
                                  result.set(inputArg);
                                  break;
  
                              case BOOLEAN:
                                  boolean b = ABooleanSerializerDeserializer.getBoolean(bytes, startOffset + 1);
                                  aInt64.setValue(b ? 1 : 0);
                                  INT64_SERDE.serialize(aInt64, out);
                                  result.set(resultStorage);
                                  break;
  
                              case STRING:
                                  utf8Ptr.set(bytes, startOffset + 1, inputArg.getLength() - 1);
                                  if (NumberUtils.parseInt64(utf8Ptr, aInt64, maybeNumeric)) {
                                      INT64_SERDE.serialize(aInt64, out);
                                      result.set(resultStorage);
                                  } else if (maybeNumeric.booleanValue() && NumberUtils.parseDouble(utf8Ptr, aDouble)) {
                                      DOUBLE_SERDE.serialize(aDouble, out);
                                      result.set(resultStorage);
                                  } else {
                                      PointableHelper.setNull(result);
                                  }
                                  break;
  
                              case ARRAY:
                              case MULTISET:
                              case OBJECT:
                                  PointableHelper.setNull(result);
                                  break;
  
                              default:
                                  throw new TypeMismatchException(sourceLoc, getIdentifier(), 0, bytes[startOffset],
                                          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,
                                          ATypeTag.SERIALIZED_BOOLEAN_TYPE_TAG, ATypeTag.SERIALIZED_STRING_TYPE_TAG,
                                          ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG,
                                          ATypeTag.SERIALIZED_UNORDEREDLIST_TYPE_TAG,
                                          ATypeTag.SERIALIZED_RECORD_TYPE_TAG);
                          }
                      }
                  };
              }
          };
      }
  
      @Override
      public FunctionIdentifier getIdentifier() {
          return BuiltinFunctions.TO_NUMBER;
      }
  }
  