commandline.CommandLineInterface.java Source code

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Here is the source code for commandline.CommandLineInterface.java

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/*
 * Licensed 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 commandline;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;

public class CommandLineInterface {

    private static CommandLine command;

    @SuppressWarnings("static-access")
    public CommandLineInterface(String[] args) {
        // create the Options
        Options options = new Options();
        // create the command line parser
        CommandLineParser parser = new GnuParser();

        Option port = OptionBuilder.withArgName("port").hasArg().isRequired().withDescription("Port Number")
                .create("s");

        Option localWorker = OptionBuilder.withArgName("N_workers").hasArg()
                .withDescription("Run local worker threads").create("lw");

        Option remoteWorker = OptionBuilder.withDescription("Run remote worker").create("rw");

        options.addOption(port);
        options.addOption(localWorker);
        options.addOption(remoteWorker);

        try {
            // parse the command line arguments
            command = parser.parse(options, args);
        } catch (ParseException exp) {
            // oops, something went wrong
            System.err.println("Parsing failed.  Reason: " + exp.getMessage());
        }

    }

    public String getOptionValue(String option) {

        if (command.hasOption(option)) {
            return command.getOptionValue(option);

        } else {

            return null;
        }

    }

    public boolean hasOption(String option) {

        return command.hasOption(option);

    }
}