Example usage for org.apache.mahout.common CommandLineUtil printHelpWithGenericOptions

Introduction

In this page you can find the example usage for org.apache.mahout.common CommandLineUtil printHelpWithGenericOptions.

Prototype

public static void printHelpWithGenericOptions(Group group, OptionException oe) throws IOException 

Source Link

Usage

From source file:my.mahout.AbstractJob.java

License:Apache License

/**
 *
 * @param args  The args to parse//from w w w.  java2 s. co m
 * @param inputOptional if false, then the input option, if set, need not be present.  If true and input is an option
 *                      and there is no input, then throw an error
 * @param outputOptional if false, then the output option, if set, need not be present.  If true and output is an
 *                       option and there is no output, then throw an error
 * @return the args parsed into a map.
 */
public Map<String, List<String>> parseArguments(String[] args, boolean inputOptional, boolean outputOptional)
        throws IOException {
    Option helpOpt = addOption(DefaultOptionCreator.helpOption());
    addOption("tempDir", null, "Intermediate output directory", "temp");
    addOption("startPhase", null, "First phase to run", "0");
    addOption("endPhase", null, "Last phase to run", String.valueOf(Integer.MAX_VALUE));

    GroupBuilder gBuilder = new GroupBuilder().withName("Job-Specific Options:");

    for (Option opt : options) {
        gBuilder = gBuilder.withOption(opt);
    }

    group = gBuilder.create();

    CommandLine cmdLine;
    try {
        Parser parser = new Parser();
        parser.setGroup(group);
        parser.setHelpOption(helpOpt);
        cmdLine = parser.parse(args);

    } catch (OptionException e) {
        log.error(e.getMessage());
        CommandLineUtil.printHelpWithGenericOptions(group, e);
        return null;
    }

    if (cmdLine.hasOption(helpOpt)) {
        CommandLineUtil.printHelpWithGenericOptions(group);
        return null;
    }

    try {
        parseDirectories(cmdLine, inputOptional, outputOptional);
    } catch (IllegalArgumentException e) {
        log.error(e.getMessage());
        CommandLineUtil.printHelpWithGenericOptions(group);
        return null;
    }

    argMap = new TreeMap<String, List<String>>();
    maybePut(argMap, cmdLine, this.options.toArray(new Option[this.options.size()]));

    this.tempPath = new Path(getOption("tempDir"));

    if (!hasOption("quiet")) {
        log.info("Command line arguments: {}", argMap);
    }
    return argMap;
}

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