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.temporal;
  
  import java.io.DataOutput;
  
  import org.apache.asterix.common.annotations.MissingNullInOutFunction;
  import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
  import org.apache.asterix.om.base.AMutableTime;
  import org.apache.asterix.om.base.ATime;
  import org.apache.asterix.om.functions.BuiltinFunctions;
  import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
  import org.apache.asterix.om.types.BuiltinType;
  import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
  import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
  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.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.VoidPointable;
  import org.apache.hyracks.data.std.util.ArrayBackedValueStorage;
  import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
  
  @MissingNullInOutFunction
  public class TimeFromUnixTimeInMsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
      private final static long serialVersionUID = 1L;
      public final static FunctionIdentifier FID = BuiltinFunctions.TIME_FROM_UNIX_TIME_IN_MS;
      public final static IFunctionDescriptorFactory FACTORY = TimeFromUnixTimeInMsDescriptor::new;
  
      /* (non-Javadoc)
       * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
       */
      @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 {
                  return new IScalarEvaluator() {
  
                      private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
                      private DataOutput out = resultStorage.getDataOutput();
                      private IPointable argPtr = new VoidPointable();
                      private IScalarEvaluator eval = args[0].createScalarEvaluator(ctx);
  
                      // possible output types
                      @SuppressWarnings("unchecked")
                      private ISerializerDeserializer<ATime> timeSerde =
                              SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ATIME);
  
                      private AMutableTime aTime = new AMutableTime(0);
  
                      @Override
                      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                          resultStorage.reset();
                          eval.evaluate(tuple, argPtr);
  
                          if (PointableHelper.checkAndSetMissingOrNull(result, argPtr)) {
                              return;
                          }
  
                          aTime.setValue(ATypeHierarchy.getIntegerValue(getIdentifier().getName(), 0,
                                  argPtr.getByteArray(), argPtr.getStartOffset()));
                          timeSerde.serialize(aTime, out);
                          result.set(resultStorage);
                      }
                  };
              }
          };
      }
  
      /* (non-Javadoc)
       * @see org.apache.asterix.om.functions.IFunctionDescriptor#getIdentifier()
       */
      @Override
      public FunctionIdentifier getIdentifier() {
          return FID;
      }
  }
  