| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * you may obtain a copy of the License from |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package edu.uci.ics.hyracks.algebricks.runtime.serializer; |
| |
| import java.io.PrintStream; |
| import java.nio.BufferOverflowException; |
| |
| 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.algebricks.data.IResultSerializerFactoryProvider; |
| import edu.uci.ics.hyracks.api.comm.IFrameTupleAccessor; |
| import edu.uci.ics.hyracks.api.dataflow.value.IResultSerializer; |
| import edu.uci.ics.hyracks.api.dataflow.value.IResultSerializerFactory; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| |
| public class ResultSerializerFactoryProvider implements IResultSerializerFactoryProvider { |
| private static final long serialVersionUID = 1L; |
| |
| public static final ResultSerializerFactoryProvider INSTANCE = new ResultSerializerFactoryProvider(); |
| |
| private ResultSerializerFactoryProvider() { |
| } |
| |
| @Override |
| public IResultSerializerFactory getAqlResultSerializerFactoryProvider(final int[] fields, |
| final IPrinterFactory[] printerFactories, final IAWriterFactory writerFactory) { |
| return new IResultSerializerFactory() { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public IResultSerializer createResultSerializer(RecordDescriptor inputRecordDesc, PrintStream printStream) { |
| final IAWriter writer = writerFactory.createWriter(fields, printStream, printerFactories, |
| inputRecordDesc); |
| |
| return new IResultSerializer() { |
| private static final long serialVersionUID = 1L; |
| |
| @Override |
| public void init() throws HyracksDataException { |
| try { |
| writer.init(); |
| } catch (AlgebricksException e) { |
| throw new HyracksDataException(e); |
| } |
| } |
| |
| @Override |
| public boolean appendTuple(IFrameTupleAccessor tAccess, int tIdx) throws HyracksDataException { |
| try { |
| writer.printTuple(tAccess, tIdx); |
| } catch (BufferOverflowException e) { |
| return false; |
| } catch (AlgebricksException e) { |
| throw new HyracksDataException(e); |
| } |
| return true; |
| } |
| }; |
| } |
| }; |
| } |
| } |