| package edu.uci.ics.hyracks.algebricks.runtime.base; |
| |
| import java.io.DataOutput; |
| |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference; |
| |
| public interface ICopySerializableAggregateFunction { |
| /** |
| * initialize the space occupied by internal state |
| * |
| * @param state |
| * @throws AlgebricksException |
| * @return length of the intermediate state |
| */ |
| public void init(DataOutput state) throws AlgebricksException; |
| |
| /** |
| * update the internal state |
| * |
| * @param tuple |
| * @param state |
| * @throws AlgebricksException |
| */ |
| public void step(IFrameTupleReference tuple, byte[] data, int start, int len) throws AlgebricksException; |
| |
| /** |
| * output the state to result |
| * |
| * @param state |
| * @param result |
| * @throws AlgebricksException |
| */ |
| public void finish(byte[] data, int start, int len, DataOutput result) throws AlgebricksException; |
| |
| /** |
| * output the partial state to partial result |
| * |
| * @param state |
| * @param partialResult |
| * @throws AlgebricksException |
| */ |
| public void finishPartial(byte[] data, int start, int len, DataOutput partialResult) throws AlgebricksException; |
| } |