| /* |
| * 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.dataflow.std.file; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.InputStream; |
| |
| import edu.uci.ics.hyracks.api.context.IHyracksStageletContext; |
| import edu.uci.ics.hyracks.api.dataflow.IOperatorNodePushable; |
| import edu.uci.ics.hyracks.api.dataflow.value.IRecordDescriptorProvider; |
| import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor; |
| import edu.uci.ics.hyracks.api.exceptions.HyracksDataException; |
| import edu.uci.ics.hyracks.api.job.IOperatorEnvironment; |
| import edu.uci.ics.hyracks.api.job.JobSpecification; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractSingleActivityOperatorDescriptor; |
| import edu.uci.ics.hyracks.dataflow.std.base.AbstractUnaryOutputSourceOperatorNodePushable; |
| |
| public class FileScanOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor { |
| private static final long serialVersionUID = 1L; |
| |
| private final IFileSplitProvider fileSplitProvider; |
| |
| private final ITupleParserFactory tupleParserFactory; |
| |
| public FileScanOperatorDescriptor(JobSpecification spec, IFileSplitProvider fileSplitProvider, |
| ITupleParserFactory tupleParserFactory, RecordDescriptor rDesc) { |
| super(spec, 0, 1); |
| this.fileSplitProvider = fileSplitProvider; |
| this.tupleParserFactory = tupleParserFactory; |
| recordDescriptors[0] = rDesc; |
| } |
| |
| @Override |
| public IOperatorNodePushable createPushRuntime(IHyracksStageletContext ctx, IOperatorEnvironment env, |
| IRecordDescriptorProvider recordDescProvider, int partition, int nPartitions) { |
| final FileSplit split = fileSplitProvider.getFileSplits()[partition]; |
| final ITupleParser tp = tupleParserFactory.createTupleParser(ctx); |
| return new AbstractUnaryOutputSourceOperatorNodePushable() { |
| @Override |
| public void initialize() throws HyracksDataException { |
| File f = split.getLocalFile().getFile(); |
| writer.open(); |
| try { |
| InputStream in; |
| try { |
| in = new FileInputStream(f); |
| } catch (FileNotFoundException e) { |
| throw new HyracksDataException(e); |
| } |
| tp.parse(in, writer); |
| } finally { |
| writer.close(); |
| } |
| } |
| }; |
| } |
| } |