Examples with IAggregateEvaluatorFactory org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory used on opensource projects

Example 6 with IAggregateEvaluatorFactory

use of org.apache.hyracks.algebricks.runtime.base.IAggregateEvaluatorFactory in project asterixdb by apache.

the class EmptyStreamAggregateDescriptor method createAggregateEvaluatorFactory.

@Override
public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(IScalarEvaluatorFactory[] args) {
    return new IAggregateEvaluatorFactory() {

        private static final long serialVersionUID = 1L;

        @Override
        public IAggregateEvaluator createAggregateEvaluator(final IHyracksTaskContext ctx) throws HyracksDataException {
            return new IAggregateEvaluator() {

                private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();

                @SuppressWarnings("rawtypes")
                private ISerializerDeserializer serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ABOOLEAN);

                boolean res = true;

                @Override
                public void init() throws HyracksDataException {
                    res = true;
                }

                @Override
                public void step(IFrameTupleReference tuple) throws HyracksDataException {
                    res = false;
                }

                @SuppressWarnings("unchecked")
                @Override
                public void finish(IPointable result) throws HyracksDataException {
                    resultStorage.reset();
                    ABoolean b = res ? ABoolean.TRUE : ABoolean.FALSE;
                    serde.serialize(b, resultStorage.getDataOutput());
                    result.set(resultStorage);
                }

                @Override
                public void finishPartial(IPointable result) throws HyracksDataException {
                    finish(result);
                }
            };
        }
    };
}