| package edu.uci.ics.hyracks.algebricks.runtime.writers; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.ObjectOutputStream; |
| import java.io.PrintStream; |
| |
| import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException; |
| import edu.uci.ics.hyracks.algebricks.data.IAWriter; |
| import edu.uci.ics.hyracks.algebricks.data.IAWriterFactory; |
| import edu.uci.ics.hyracks.algebricks.data.IPrinterFactory; |
| import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| |
| public class SerializedDataWriterFactory implements IAWriterFactory { |
| |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public IAWriter createWriter(final int[] fields, final PrintStream ps, IPrinterFactory[] printerFactories, |
| final RecordDescriptor inputRecordDescriptor) { |
| return new IAWriter() { |
| |
| @Override |
| public void init() throws AlgebricksException { |
| // dump the SerializerDeserializers to disk |
| try { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| ObjectOutputStream oos = new ObjectOutputStream(baos); |
| oos.writeObject(inputRecordDescriptor); |
| baos.writeTo(ps); |
| oos.close(); |
| } catch (IOException e) { |
| throw new AlgebricksException(e); |
| } |
| } |
| |
| @Override |
| public void printTuple(IFrameTupleAccessor tAccess, int tIdx) throws AlgebricksException { |
| for (int i = 0; i < fields.length; i++) { |
| int fldStart = tAccess.getTupleStartOffset(tIdx) + tAccess.getFieldSlotsLength() |
| + tAccess.getFieldStartOffset(tIdx, fields[i]); |
| int fldLen = tAccess.getFieldLength(tIdx, fields[i]); |
| ps.write(tAccess.getBuffer().array(), fldStart, fldLen); |
| } |
| } |
| }; |
| } |
| } |