Examples with DynamicClassLoader com.facebook.presto.bytecode.DynamicClassLoader used on opensource projects

Example 26 with DynamicClassLoader

use of com.facebook.presto.bytecode.DynamicClassLoader in project presto by prestodb.

the class AbstractMinMaxByNAggregationFunction method generateAggregation.

protected InternalAggregationFunction generateAggregation(Type valueType, Type keyType) {
    DynamicClassLoader classLoader = new DynamicClassLoader(AbstractMinMaxNAggregationFunction.class.getClassLoader());
    BlockComparator comparator = typeToComparator.apply(keyType);
    List<Type> inputTypes = ImmutableList.of(valueType, keyType, BIGINT);
    MinMaxByNStateSerializer stateSerializer = new MinMaxByNStateSerializer(comparator, keyType, valueType);
    Type intermediateType = stateSerializer.getSerializedType();
    ArrayType outputType = new ArrayType(valueType);
    List<AggregationMetadata.ParameterMetadata> inputParameterMetadata = ImmutableList.of(new AggregationMetadata.ParameterMetadata(STATE), new AggregationMetadata.ParameterMetadata(NULLABLE_BLOCK_INPUT_CHANNEL, valueType), new AggregationMetadata.ParameterMetadata(BLOCK_INPUT_CHANNEL, keyType), new AggregationMetadata.ParameterMetadata(BLOCK_INDEX), new AggregationMetadata.ParameterMetadata(INPUT_CHANNEL, BIGINT));
    AggregationMetadata metadata = new AggregationMetadata(generateAggregationName(name, valueType.getTypeSignature(), inputTypes.stream().map(Type::getTypeSignature).collect(toImmutableList())), inputParameterMetadata, INPUT_FUNCTION.bindTo(comparator).bindTo(valueType).bindTo(keyType), COMBINE_FUNCTION, OUTPUT_FUNCTION.bindTo(outputType), MinMaxByNState.class, stateSerializer, new MinMaxByNStateFactory(), outputType);
    GenericAccumulatorFactoryBinder factory = AccumulatorCompiler.generateAccumulatorFactoryBinder(metadata, classLoader);
    return new InternalAggregationFunction(name, inputTypes, intermediateType, outputType, true, factory);
}