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 java.io.IOException;
  
  import org.apache.asterix.common.annotations.MissingNullInOutFunction;
  import org.apache.asterix.dataflow.data.nontagged.serde.ADoubleSerializerDeserializer;
  import org.apache.asterix.dataflow.data.nontagged.serde.APointSerializerDeserializer;
  import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
  import org.apache.asterix.om.base.AMissing;
  import org.apache.asterix.om.base.ANull;
  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.ListAccessor;
  import org.apache.asterix.runtime.exceptions.InvalidDataFormatException;
  import org.apache.asterix.runtime.exceptions.TypeMismatchException;
  import org.apache.asterix.runtime.exceptions.UnsupportedItemTypeException;
  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 CreatePolygonDescriptor extends AbstractScalarFunctionDynamicDescriptor {
  
      private static final long serialVersionUID = 1L;
      public static final IFunctionDescriptorFactory FACTORY = CreatePolygonDescriptor::new;
  
      @Override
      public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
          return new IScalarEvaluatorFactory() {
  
              private static final long serialVersionUID = 1L;
  
              @Override
              public IScalarEvaluator createScalarEvaluator(IEvaluatorContext ctx) throws HyracksDataException {
                  return new IScalarEvaluator() {
  
                      private final ListAccessor listAccessor = new ListAccessor();
                      private final ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
                      private final DataOutput out = resultStorage.getDataOutput();
                      private final IScalarEvaluatorFactory listEvalFactory = args[0];
                      private final IPointable inputArgList = new VoidPointable();
                      private final IScalarEvaluator evalList = listEvalFactory.createScalarEvaluator(ctx);
                      @SuppressWarnings("unchecked")
                      private final ISerializerDeserializer<ANull> nullSerde =
                              SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ANULL);
                      @SuppressWarnings("unchecked")
                      private final ISerializerDeserializer<AMissing> missingSerde =
                              SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AMISSING);
  
                      @Override
                      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                          try {
                              resultStorage.reset();
                              evalList.evaluate(tuple, inputArgList);
  
                              if (PointableHelper.checkAndSetMissingOrNull(result, inputArgList)) {
                                  return;
                              }
  
                              byte[] listBytes = inputArgList.getByteArray();
                              int offset = inputArgList.getStartOffset();
  
                              if (listBytes[offset] != ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG
                                      && listBytes[offset] != ATypeTag.SERIALIZED_UNORDEREDLIST_TYPE_TAG) {
                                  throw new TypeMismatchException(sourceLoc, getIdentifier(), 0, listBytes[offset],
                                          ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG,
                                          ATypeTag.SERIALIZED_UNORDEREDLIST_TYPE_TAG);
                              }
                              listAccessor.reset(listBytes, offset);
                              // First check the list consists of a valid items
                              for (int i = 0; i < listAccessor.size(); i++) {
                                  int itemOffset = listAccessor.getItemOffset(i);
                                  ATypeTag itemType = listAccessor.getItemType(itemOffset);
                                  if (itemType != ATypeTag.DOUBLE) {
                                      if (itemType == ATypeTag.NULL) {
                                          nullSerde.serialize(ANull.NULL, out);
                                          return;
                                      }
                                      if (itemType == ATypeTag.MISSING) {
                                          missingSerde.serialize(AMissing.MISSING, out);
                                          return;
                                      }
                                      throw new UnsupportedItemTypeException(sourceLoc, BuiltinFunctions.CREATE_POLYGON,
                                              itemType.serialize());
                                  }
  
                              }
                              if (listAccessor.size() < 6) {
                                  throw new InvalidDataFormatException(sourceLoc, getIdentifier(),
                                          ATypeTag.SERIALIZED_POLYGON_TYPE_TAG);
                              } else if (listAccessor.size() % 2 != 0) {
                                  throw new InvalidDataFormatException(sourceLoc, getIdentifier(),
                                          ATypeTag.SERIALIZED_POLYGON_TYPE_TAG);
                              }
                              out.writeByte(ATypeTag.SERIALIZED_POLYGON_TYPE_TAG);
                              out.writeShort(listAccessor.size() / 2);
  
                              final int skipTypeTag = listAccessor.itemsAreSelfDescribing() ? 1 : 0;
                              for (int i = 0; i < listAccessor.size() / 2; i++) {
                                  int firstDoubleOffset = listAccessor.getItemOffset(i * 2) + skipTypeTag;
                                  int secondDobuleOffset = listAccessor.getItemOffset((i * 2) + 1) + skipTypeTag;
  
                                  APointSerializerDeserializer.serialize(
                                          ADoubleSerializerDeserializer.getDouble(listBytes, firstDoubleOffset),
                                          ADoubleSerializerDeserializer.getDouble(listBytes, secondDobuleOffset), out);
                              }
                              result.set(resultStorage);
                          } catch (IOException e) {
                              throw HyracksDataException.create(e);
                          }
                      }
                  };
              }
          };
      }
  
      @Override
      public FunctionIdentifier getIdentifier() {
          return BuiltinFunctions.CREATE_POLYGON;
      }
  }
  