| /* |
| * 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.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.sysds.common.Types.FileFormat; |
| import org.apache.sysds.conf.CompilerConfig.ConfigType; |
| import org.apache.sysds.conf.ConfigurationManager; |
| import org.apache.sysds.runtime.DMLRuntimeException; |
| |
| public class FrameReaderFactory { |
| protected static final Log LOG = LogFactory.getLog(FrameReaderFactory.class.getName()); |
| |
| public static FrameReader createFrameReader(FileFormat fmt) { |
| if( LOG.isDebugEnabled() ) |
| LOG.debug("Creating Frame Reader " + fmt); |
| FileFormatProperties props = (fmt == FileFormat.CSV) ? new FileFormatPropertiesCSV() : null; |
| return createFrameReader(fmt, props); |
| } |
| |
| public static FrameReader createFrameReader(FileFormat fmt, FileFormatProperties props) { |
| if( LOG.isDebugEnabled() ) |
| LOG.debug("Creating Frame Reader " + fmt + props); |
| FrameReader reader = null; |
| |
| switch(fmt) { |
| case TEXT: |
| if(ConfigurationManager.getCompilerConfigFlag(ConfigType.PARALLEL_CP_READ_TEXTFORMATS)) |
| reader = new FrameReaderTextCellParallel(); |
| else |
| reader = new FrameReaderTextCell(); |
| break; |
| |
| case CSV: |
| if(props != null && !(props instanceof FileFormatPropertiesCSV)) |
| throw new DMLRuntimeException("Wrong type of file format properties for CSV writer."); |
| if(ConfigurationManager.getCompilerConfigFlag(ConfigType.PARALLEL_CP_READ_TEXTFORMATS)) |
| reader = new FrameReaderTextCSVParallel((FileFormatPropertiesCSV) props); |
| else |
| reader = new FrameReaderTextCSV((FileFormatPropertiesCSV) props); |
| break; |
| |
| case BINARY: |
| if(ConfigurationManager.getCompilerConfigFlag(ConfigType.PARALLEL_CP_READ_BINARYFORMATS)) |
| reader = new FrameReaderBinaryBlockParallel(); |
| else |
| reader = new FrameReaderBinaryBlock(); |
| break; |
| case PROTO: |
| // TODO performance improvement: add parallel reader |
| reader = new FrameReaderProto(); |
| break; |
| |
| default: |
| throw new DMLRuntimeException("Failed to create frame reader for unknown format: " + fmt.toString()); |
| } |
| |
| return reader; |
| } |
| } |