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package eu.dnetlib.iis.core.java;
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import org.apache.commons.cli.CommandLine;
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import org.apache.commons.cli.CommandLineParser;
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import org.apache.commons.cli.GnuParser;
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import org.apache.commons.cli.HelpFormatter;
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import org.apache.commons.cli.Option;
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import org.apache.commons.cli.OptionBuilder;
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import org.apache.commons.cli.Options;
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import org.apache.commons.cli.ParseException;
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import org.apache.commons.lang3.StringUtils;
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/**
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*
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* @author Mateusz Kobos
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*
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*/
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public class CmdLineParser {
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/** HACK: make the names of various types of parameters of the program
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* more readable, e.g. "--Input_person=..." instead of "-Iperson=...",
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* "--Output_merged=..." instead of "-Omerged=...". I wasn't able to
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* get such notation so far using the Apache CLI. */
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public static String constructorPrefix = "C";
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public static String inputPrefix = "I";
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public static String outputPrefix = "O";
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public static String specialParametersPrefix = "S";
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/** HACK: This field should be removed since this list of special
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* parameters is empty, thus not used anywhere.*/
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public static String[] mandatorySpecialParameters =
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new String[]{};
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public static String processParametersPrefix = "P";
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public static CommandLine parse(String[] args) {
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Options options = new Options();
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@SuppressWarnings("static-access")
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Option constructorParams = OptionBuilder.withArgName("STRING")
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.hasArg()
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.withDescription("Constructor parameter")
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.withLongOpt("ConstructorParam")
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.create(constructorPrefix);
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options.addOption(constructorParams);
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@SuppressWarnings("static-access")
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Option inputs = OptionBuilder.withArgName("portName=URI")
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.hasArgs(2)
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.withValueSeparator()
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.withDescription("Path binding for a given input port")
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.withLongOpt("Input")
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.create(inputPrefix);
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options.addOption(inputs);
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@SuppressWarnings("static-access")
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Option outputs = OptionBuilder.withArgName("portName=URI")
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.hasArgs(2)
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.withValueSeparator()
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.withDescription("Path binding for a given output port")
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.create(outputPrefix);
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options.addOption(outputs);
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@SuppressWarnings("static-access")
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Option specialParameter = OptionBuilder.withArgName("parameter_name=string")
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.hasArgs(2)
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.withValueSeparator()
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.withDescription(String.format("Value of special parameter. "
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+ "These are the mandatory parameters={%s}",
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StringUtils.join(mandatorySpecialParameters, ",")))
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.create(specialParametersPrefix);
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options.addOption(specialParameter);
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@SuppressWarnings("static-access")
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Option otherParameter = OptionBuilder.withArgName("parameter_name=string")
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.hasArgs(2)
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.withValueSeparator()
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.withDescription(
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String.format("Value of some other parameter."))
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.create(processParametersPrefix);
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options.addOption(otherParameter);
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Option help = new Option("help", "print this message");
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options.addOption(help);
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CommandLineParser parser = new GnuParser();
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try {
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CommandLine cmdLine = parser.parse(options, args);
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if(cmdLine.hasOption("help")){
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HelpFormatter formatter = new HelpFormatter();
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formatter.printHelp("", options );
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System.exit(1);
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}
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return cmdLine;
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} catch (ParseException e) {
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throw new CmdLineParserException(
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"Parsing command line arguments failed", e);
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}
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}
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}
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