Java tutorial
package uni.bielefeld.cmg.sparkhit.hadoop.decodec.util; /** * Created by Liren Huang on 13/01/16. * * SparkHit * Copyright (c) 2015-2015: * Liren Huang <huanglr at cebitec.uni-bielefeld.de> * * SparkHit is free software: you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation, either version 3 of the License, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, but WITHOU * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along * with this program. If not, see <http://www.gnu.org/licenses/>. */ import org.apache.commons.cli.*; import javax.xml.bind.annotation.XmlElementDecl; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.Map; public class Parameter { private String[] arguments; private InfoDumper info = new InfoDumper(); public Parameter(String[] arguments) throws IOException, ParseException { this.arguments = arguments; } private static final Options parameter = new Options(); DefaultParam param = new DefaultParam(); /* parameter IDs */ private static final String INPUT_BZ2 = "bz2", INPUT_GZ = "gz", INPUT_SPLIT = "insplit", OUTPUT_FILE = "outfile", OUTPUT_FORMAT = "outfm", OUTPUT_OVERWRITE = "overwrite", VERSION = "version", HELP2 = "h", HELP = "help"; private static final Map<String, Integer> parameterMap = new HashMap<String, Integer>(); public void putParameterID() { int o = 0; parameterMap.put(INPUT_BZ2, o++); parameterMap.put(INPUT_GZ, o++); parameterMap.put(INPUT_SPLIT, o++); parameterMap.put(OUTPUT_FILE, o++); parameterMap.put(OUTPUT_FORMAT, o++); parameterMap.put(OUTPUT_OVERWRITE, o++); parameterMap.put(VERSION, o++); parameterMap.put(HELP, o++); parameterMap.put(HELP2, o++); } public void addParameterInfo() { /* use Object parameter of Options class to store parameter information */ parameter.addOption(OptionBuilder.withArgName("input bz2 file").hasArg() .withDescription("Input Next Generation Sequencing (NGS) data, fastq .bz2 file").create(INPUT_BZ2)); parameter.addOption(OptionBuilder.withArgName("input gz file").hasArg() .withDescription("Input Next Generation Sequencing (NGS) data, fastq .gz file").create(INPUT_GZ)); parameter.addOption(OptionBuilder.withArgName("input file split").hasArg() .withDescription("Split input file for parallelization, use Hadoop FileInputFormat InputSplit") .create(INPUT_SPLIT)); parameter.addOption(OptionBuilder.withArgName("output file").hasArg() .withDescription("Output line based file in text format").create(OUTPUT_FILE)); parameter.addOption(OptionBuilder.withArgName("output file format").hasArg().withDescription( "0 output fastq units in lines, 1 output fastq units to fasta, 2 still ouput fastq, 3 output fastq units in one line, default in 0") .create(OUTPUT_FORMAT)); parameter.addOption(OptionBuilder.withArgName("overwrite output").hasArg(false) .withDescription("set to overwrite output file if exists").create(OUTPUT_OVERWRITE)); parameter .addOption(OptionBuilder.hasArg(false).withDescription("show version information").create(VERSION)); parameter.addOption( OptionBuilder.hasArg(false).withDescription("print and show this information").create(HELP)); parameter.addOption(OptionBuilder.hasArg(false).withDescription("").create(HELP2)); } /* main method */ public DefaultParam importCommandLine() { /* Assigning Parameter ID to an ascending number */ putParameterID(); /* Assigning parameter descriptions to each parameter ID */ addParameterInfo(); /* need a Object parser of PosixParser class for the function parse of CommandLine class */ PosixParser parser = new PosixParser(); /* print out help information */ HelpParam help = new HelpParam(parameter, parameterMap); /* check each parameter for assignment */ try { long input_limit = -1; int threads = Runtime.getRuntime().availableProcessors(); /* Set Object cl of CommandLine class for Parameter storage */ CommandLine cl = parser.parse(parameter, arguments, true); if (cl.hasOption(HELP)) { help.printHelp(); System.exit(0); } if (cl.hasOption(HELP2)) { help.printHelp(); System.exit(0); } if (cl.hasOption(VERSION)) { System.exit(0); } /* Checking all parameters */ String value; if ((value = cl.getOptionValue(INPUT_BZ2)) != null) { param.inputFqPath = value; param.bz2 = true; } /* not applicable for HDFS and S3 */ /* using TextFileBufferInput for such purpose */ // File inputFastq = new File(param.inputFqPath).getAbsoluteFile(); // if (!inputFastq.exists()){ // err.println("Input query file not found."); // return; //i } if ((value = cl.getOptionValue(INPUT_GZ)) != null) { param.inputFqPath = value; param.gz = true; } else if (cl.getOptionValue(INPUT_BZ2) == null) { help.printHelp(); System.exit(0); //throw new IOException("Input query file not specified.\nUse -help for list of options"); } if ((value = cl.getOptionValue(INPUT_SPLIT)) != null) { param.splitsize = Long.decode(value); } if ((value = cl.getOptionValue(OUTPUT_FILE)) != null) { param.outputPath = value; } else { info.readMessage("Output file not set of -outfile options"); info.screenDump(); } if (cl.hasOption(OUTPUT_OVERWRITE)) { param.overwrite = true; } if ((value = cl.getOptionValue(OUTPUT_FORMAT)) != null) { param.outputFormat = Integer.decode(value); } File outfile = new File(param.outputPath).getAbsoluteFile(); if (outfile.exists()) { info.readParagraphedMessages( "Output file : \n\t" + param.outputPath + "\nalready exists, will be overwrite."); info.screenDump(); Runtime.getRuntime().exec("rm -rf " + param.outputPath); } } catch (IOException e) { // Don`t catch this, NaNaNaNa, U can`t touch this. info.readMessage("Parameter settings incorrect."); info.screenDump(); e.printStackTrace(); System.exit(0); } catch (RuntimeException e) { info.readMessage("Parameter settings incorrect."); info.screenDump(); e.printStackTrace(); System.exit(0); } catch (ParseException e) { info.readMessage("Parameter settings incorrect."); info.screenDump(); e.printStackTrace(); System.exit(0); } return param; } }