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.IOException;
  
  import org.apache.asterix.builders.OrderedListBuilder;
  import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
  import org.apache.asterix.om.base.ABoolean;
  import org.apache.asterix.om.base.AFloat;
  import org.apache.asterix.om.base.AMutableFloat;
  import org.apache.asterix.om.functions.BuiltinFunctions;
  import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
  import org.apache.asterix.om.types.AOrderedListType;
  import org.apache.asterix.om.types.BuiltinType;
  import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
  import org.apache.asterix.runtime.evaluators.common.SimilarityJaccardPrefixEvaluator;
  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.util.ArrayBackedValueStorage;
  
  public class SimilarityJaccardPrefixCheckDescriptor extends AbstractScalarFunctionDynamicDescriptor {
  
      private static final long serialVersionUID = 1L;
  
      public static final IFunctionDescriptorFactory FACTORY = SimilarityJaccardPrefixCheckDescriptor::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 SimilarityJaccardPrefixCheckEvaluator(args, ctx);
              }
          };
      }
  
      @Override
      public FunctionIdentifier getIdentifier() {
          return BuiltinFunctions.SIMILARITY_JACCARD_PREFIX_CHECK;
      }
  
      private static class SimilarityJaccardPrefixCheckEvaluator extends SimilarityJaccardPrefixEvaluator {
  
          private final OrderedListBuilder listBuilder;
          private ArrayBackedValueStorage inputVal;
          @SuppressWarnings("unchecked")
          private final ISerializerDeserializer<ABoolean> booleanSerde =
                  SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ABOOLEAN);
          @SuppressWarnings("unchecked")
          private final ISerializerDeserializer<AFloat> floatSerde =
                  SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AFLOAT);
          private final AMutableFloat aFloat = new AMutableFloat(0);
  
          private final AOrderedListType listType = new AOrderedListType(BuiltinType.ANY, "list");
  
          public SimilarityJaccardPrefixCheckEvaluator(IScalarEvaluatorFactory[] args, IEvaluatorContext context)
                  throws HyracksDataException {
              super(args, context);
              listBuilder = new OrderedListBuilder();
              inputVal = new ArrayBackedValueStorage();
          }
  
          @Override
          public void writeResult() throws HyracksDataException, IOException {
              listBuilder.reset(listType);
              boolean matches = (sim <= 0) ? false : true;
              float jaccSim = (matches) ? sim : 0.0f;
  
              inputVal.reset();
              booleanSerde.serialize(matches ? ABoolean.TRUE : ABoolean.FALSE, inputVal.getDataOutput());
              listBuilder.addItem(inputVal);
  
              inputVal.reset();
              aFloat.setValue(jaccSim);
              floatSerde.serialize(aFloat, inputVal.getDataOutput());
              listBuilder.addItem(inputVal);
              listBuilder.write(out, true);
          }
      }
  
  }
  