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.AMutableInt64;
  import org.apache.asterix.om.base.AMutableTime;
  import org.apache.asterix.om.base.ATime;
  import org.apache.asterix.om.base.temporal.DateTimeFormatUtils;
  import org.apache.asterix.om.base.temporal.DateTimeFormatUtils.DateTimeParseMode;
  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.functions.PointableHelper;
  import org.apache.asterix.runtime.exceptions.InvalidDataFormatException;
  import org.apache.asterix.runtime.exceptions.TypeMismatchException;
  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 ParseTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
      private static final long serialVersionUID = 1L;
  
      public final static IFunctionDescriptorFactory FACTORY = ParseTimeDescriptor::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 {
                  return new IScalarEvaluator() {
  
                      private final ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
                      private final DataOutput out = resultStorage.getDataOutput();
                      private final IPointable argPtr0 = new VoidPointable();
                      private final IPointable argPtr1 = new VoidPointable();
                      private final IScalarEvaluator eval0 = args[0].createScalarEvaluator(ctx);
                      private final IScalarEvaluator eval1 = args[1].createScalarEvaluator(ctx);
  
                      @SuppressWarnings("unchecked")
                      private final ISerializerDeserializer<ATime> timeSerde =
                              SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ATIME);
  
                      private final AMutableInt64 aInt64 = new AMutableInt64(0);
                      private final AMutableTime aTime = new AMutableTime(0);
                      private final UTF8StringPointable utf8Ptr = new UTF8StringPointable();
  
                      private final DateTimeFormatUtils util = DateTimeFormatUtils.getInstance();
  
                      @Override
                      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                          resultStorage.reset();
                          eval0.evaluate(tuple, argPtr0);
                          eval1.evaluate(tuple, argPtr1);
  
                          if (PointableHelper.checkAndSetMissingOrNull(result, argPtr0, argPtr1)) {
                              return;
                          }
  
                          byte[] bytes0 = argPtr0.getByteArray();
                          int offset0 = argPtr0.getStartOffset();
                          int len0 = argPtr0.getLength();
                          byte[] bytes1 = argPtr1.getByteArray();
                          int offset1 = argPtr1.getStartOffset();
                          int len1 = argPtr1.getLength();
  
                          if (bytes0[offset0] != ATypeTag.SERIALIZED_STRING_TYPE_TAG) {
                              throw new TypeMismatchException(sourceLoc, getIdentifier(), 0, bytes0[offset0],
                                      ATypeTag.SERIALIZED_STRING_TYPE_TAG);
                          }
                          if (bytes1[offset1] != ATypeTag.SERIALIZED_STRING_TYPE_TAG) {
                              throw new TypeMismatchException(sourceLoc, getIdentifier(), 1, bytes1[offset1],
                                      ATypeTag.SERIALIZED_STRING_TYPE_TAG);
                          }
                          utf8Ptr.set(bytes0, offset0 + 1, len0 - 1);
                          int start0 = utf8Ptr.getCharStartOffset();
                          int length0 = utf8Ptr.getUTF8Length();
  
                          utf8Ptr.set(bytes1, offset1 + 1, len1 - 1);
                          int start1 = utf8Ptr.getCharStartOffset();
                          int length1 = utf8Ptr.getUTF8Length();
  
                          int formatStart = start1;
                          int formatLength;
                          boolean processSuccessfully = false;
                          while (!processSuccessfully && formatStart < start1 + length1) {
                              // search for "|"
                              formatLength = 0;
                              for (; formatStart + formatLength < start1 + length1; formatLength++) {
                                  if (bytes1[formatStart + formatLength] == '|') {
                                      break;
                                  }
                              }
                              processSuccessfully = util.parseDateTime(aInt64, bytes0, start0, length0, bytes1,
                                      formatStart, formatLength, DateTimeParseMode.TIME_ONLY, false);
                              formatStart += formatLength + 1;
                          }
                          if (!processSuccessfully) {
                              throw new InvalidDataFormatException(sourceLoc, getIdentifier(),
                                      ATypeTag.SERIALIZED_TIME_TYPE_TAG);
                          }
                          aTime.setValue((int) aInt64.getLongValue());
                          timeSerde.serialize(aTime, out);
                          result.set(resultStorage);
                      }
                  };
              }
  
          };
      }
  
      /* (non-Javadoc)
       * @see org.apache.asterix.om.functions.AbstractFunctionDescriptor#getIdentifier()
       */
      @Override
      public FunctionIdentifier getIdentifier() {
          return BuiltinFunctions.PARSE_TIME;
      }
  }
  