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.dataflow.data.nontagged.serde.AOrderedListSerializerDeserializer;
  import org.apache.asterix.dataflow.data.nontagged.serde.AUnorderedListSerializerDeserializer;
  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.EnumDeserializer;
  import org.apache.asterix.om.utils.NonTaggedFormatUtil;
  import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
  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.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;
  
  public class AnyCollectionMemberDescriptor extends AbstractScalarFunctionDynamicDescriptor {
  
      private static final long serialVersionUID = 1L;
      public static final IFunctionDescriptorFactory FACTORY = AnyCollectionMemberDescriptor::new;
  
      @Override
      public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
          return new AnyCollectionMemberEvalFactory(args[0]);
      }
  
      @Override
      public FunctionIdentifier getIdentifier() {
          return BuiltinFunctions.ANY_COLLECTION_MEMBER;
      }
  
      private class AnyCollectionMemberEvalFactory implements IScalarEvaluatorFactory {
  
          private static final long serialVersionUID = 1L;
  
          private IScalarEvaluatorFactory listEvalFactory;
          private byte serItemTypeTag;
          private ATypeTag itemTag;
          private boolean selfDescList = false;
  
          public AnyCollectionMemberEvalFactory(IScalarEvaluatorFactory arg) {
              this.listEvalFactory = arg;
          }
  
          @Override
          public IScalarEvaluator createScalarEvaluator(IEvaluatorContext ctx) throws HyracksDataException {
              return new IScalarEvaluator() {
  
                  private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
                  private DataOutput out = resultStorage.getDataOutput();
                  private IPointable inputArgList = new VoidPointable();
                  private IScalarEvaluator evalList = listEvalFactory.createScalarEvaluator(ctx);
                  private int itemOffset;
                  private int itemLength;
  
                  @Override
                  public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
  
                      resultStorage.reset();
                      evalList.evaluate(tuple, inputArgList);
  
                      if (PointableHelper.checkAndSetMissingOrNull(result, inputArgList)) {
                          return;
                      }
  
                      byte[] serList = inputArgList.getByteArray();
                      int offset = inputArgList.getStartOffset();
  
                      if (serList[offset] != ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG
                              && serList[offset] != ATypeTag.SERIALIZED_UNORDEREDLIST_TYPE_TAG) {
                          throw new TypeMismatchException(sourceLoc, serList[offset],
                                  ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG, ATypeTag.SERIALIZED_UNORDEREDLIST_TYPE_TAG);
                      }
  
                      try {
                          if (serList[offset] == ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG) {
                              if (AOrderedListSerializerDeserializer.getNumberOfItems(serList, offset) == 0) {
                                  out.writeByte(ATypeTag.SERIALIZED_MISSING_TYPE_TAG);
                                  result.set(resultStorage);
                                  return;
                              }
                              itemOffset = AOrderedListSerializerDeserializer.getItemOffset(serList, offset, 0);
                          } else {
                              if (AUnorderedListSerializerDeserializer.getNumberOfItems(serList, offset) == 0) {
                                  out.writeByte(ATypeTag.SERIALIZED_MISSING_TYPE_TAG);
                                  result.set(resultStorage);
                                  return;
                              }
                              itemOffset = AUnorderedListSerializerDeserializer.getItemOffset(serList, offset, 0);
                          }
  
                          itemTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serList[offset + 1]);
                          if (itemTag == ATypeTag.ANY) {
                              selfDescList = true;
                          } else {
                              serItemTypeTag = serList[offset + 1];
                          }
  
                          if (selfDescList) {
                              itemTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serList[itemOffset]);
                              itemLength =
                                      NonTaggedFormatUtil.getFieldValueLength(serList, itemOffset, itemTag, true) + 1;
                              result.set(serList, itemOffset, itemLength);
                          } else {
                              itemLength = NonTaggedFormatUtil.getFieldValueLength(serList, itemOffset, itemTag, false);
                              out.writeByte(serItemTypeTag);
                              out.write(serList, itemOffset, itemLength);
                              result.set(resultStorage);
                          }
                      } catch (IOException e) {
                          throw HyracksDataException.create(e);
                      }
                  }
              };
          }
  
      }
  
  }
  