if (!(localStub instanceof FlatCombineFunction)) {
throw new IllegalStateException("Performing combining sort outside a reduce task!");
}
@SuppressWarnings({ "rawtypes", "unchecked" })
CombiningUnilateralSortMerger<?> cSorter = new CombiningUnilateralSortMerger(
(FlatCombineFunction) localStub, getMemoryManager(), getIOManager(), this.inputIterators[inputNum],
this, this.inputSerializers[inputNum], getLocalStrategyComparator(inputNum),
this.config.getRelativeMemoryInput(inputNum), this.config.getFilehandlesInput(inputNum),
this.config.getSpillingThresholdInput(inputNum));
cSorter.setUdfConfiguration(this.config.getStubParameters());
// set the input to null such that it will be lazily fetched from the input strategy
this.inputs[inputNum] = null;
this.localStrategies[inputNum] = cSorter;
break;