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

Example 1 with IRunningAggregateEvaluator

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

the class TidRunningAggregateDescriptor method createRunningAggregateEvaluatorFactory.

@Override
public IRunningAggregateEvaluatorFactory createRunningAggregateEvaluatorFactory(IScalarEvaluatorFactory[] args) {
    return new IRunningAggregateEvaluatorFactory() {

        private static final long serialVersionUID = 1L;

        @SuppressWarnings("unchecked")
        @Override
        public IRunningAggregateEvaluator createRunningAggregateEvaluator(IHyracksTaskContext ctx) throws HyracksDataException {
            return new IRunningAggregateEvaluator() {

                private final ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();

                private final ISerializerDeserializer<AInt64> serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT64);

                private final AMutableInt64 m = new AMutableInt64(0);

                private int cnt;

                @Override
                public void step(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                    resultStorage.reset();
                    m.setValue(cnt);
                    serde.serialize(m, resultStorage.getDataOutput());
                    result.set(resultStorage);
                    ++cnt;
                }

                @Override
                public void init() throws HyracksDataException {
                    cnt = 1;
                }
            };
        }
    };
}

Example 2 with IRunningAggregateEvaluator

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

the class TupleCountRunningAggregateFunctionFactory method createRunningAggregateEvaluator.

@Override
public IRunningAggregateEvaluator createRunningAggregateEvaluator(IHyracksTaskContext ctx) throws HyracksDataException {
    final ArrayBackedValueStorage abvs = new ArrayBackedValueStorage();
    return new IRunningAggregateEvaluator() {

        int cnt;

        @Override
        public void step(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
            try {
                ++cnt;
                abvs.reset();
                abvs.getDataOutput().writeInt(cnt);
                result.set(abvs);
            } catch (IOException e) {
                throw new HyracksDataException(e);
            }
        }

        @Override
        public void init() throws HyracksDataException {
            cnt = 0;
        }
    };
}