| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 at |
| * |
| * 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 org.apache.sysds.runtime.io; |
| |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.SequenceFile; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.sysds.common.Types.ValueType; |
| import org.apache.sysds.conf.ConfigurationManager; |
| import org.apache.sysds.runtime.DMLRuntimeException; |
| import org.apache.sysds.runtime.data.TensorBlock; |
| import org.apache.sysds.runtime.data.TensorIndexes; |
| import org.apache.sysds.runtime.util.UtilFunctions; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| public class TensorReaderBinaryBlock extends TensorReader { |
| @SuppressWarnings("resource") |
| @Override |
| public TensorBlock readTensorFromHDFS(String fname, long[] dims, |
| int blen, ValueType[] schema) throws IOException, DMLRuntimeException { |
| //prepare file access |
| JobConf job = new JobConf(ConfigurationManager.getCachedJobConf()); |
| Path path = new Path(fname); |
| FileSystem fs = IOUtilFunctions.getFileSystem(path, job); |
| |
| //check existence and non-empty file |
| checkValidInputFile(fs, path); |
| |
| //core read |
| return readBinaryBlockTensorFromHDFS(path, job, fs, dims, blen, schema); |
| } |
| |
| protected TensorBlock readBinaryBlockTensorFromHDFS(Path path, JobConf job, FileSystem fs, long[] dims, |
| int blen, ValueType[] schema) throws IOException { |
| int[] idims = Arrays.stream(dims).mapToInt(i -> (int) i).toArray(); |
| TensorBlock ret; |
| if (schema.length == 1) |
| ret = new TensorBlock(schema[0], idims).allocateBlock(); |
| else |
| ret = new TensorBlock(schema, idims).allocateBlock(); |
| TensorIndexes key = new TensorIndexes(); |
| // TODO reuse blocks |
| |
| for (Path lpath : IOUtilFunctions.getSequenceFilePaths(fs, path)) { |
| TensorBlock value = new TensorBlock(); |
| |
| try (SequenceFile.Reader reader = new SequenceFile.Reader(job, SequenceFile.Reader.file(lpath))) { |
| while (reader.next(key, value)) { |
| if (value.isEmpty(false)) |
| continue; |
| int[] lower = new int[dims.length]; |
| int[] upper = new int[lower.length]; |
| UtilFunctions.getBlockBounds(key, value.getLongDims(), blen, lower, upper); |
| ret.copy(lower, upper, value); |
| } |
| } |
| } |
| return ret; |
| } |
| } |