| package edu.uci.ics.hyracks.algebricks.runtime.writers; |
| |
| 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.IPrinter; |
| 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 PrinterBasedWriterFactory implements IAWriterFactory { |
| |
| private static final long serialVersionUID = 1L; |
| |
| public static final PrinterBasedWriterFactory INSTANCE = new PrinterBasedWriterFactory(); |
| |
| public PrinterBasedWriterFactory() { |
| } |
| |
| @Override |
| public IAWriter createWriter(final int[] fields, final PrintStream printStream, |
| final IPrinterFactory[] printerFactories, RecordDescriptor inputRecordDescriptor) { |
| final IPrinter[] printers = new IPrinter[printerFactories.length]; |
| for (int i = 0; i < printerFactories.length; i++) { |
| printers[i] = printerFactories[i].createPrinter(); |
| } |
| |
| return new IAWriter() { |
| |
| @Override |
| public void init() throws AlgebricksException { |
| for (int i = 0; i < printers.length; i++) { |
| printers[i].init(); |
| } |
| } |
| |
| @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]); |
| if (i > 0) { |
| printStream.print("; "); |
| } |
| printers[i].print(tAccess.getBuffer().array(), fldStart, fldLen, printStream); |
| } |
| printStream.println(); |
| } |
| }; |
| } |
| } |