src/example/multi-project/projects/find/src/find/Main.java

/*
 *  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
 *
 *      https://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 find;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;

import java.io.File;
import java.util.Collection;

public final class Main {
    private static Options getOptions() {
        Option dir = Option.builder("d")
            .longOpt("dir")
            .hasArg()
            .desc("list files in given dir")
            .build();
        Option name = Option.builder("n")
            .longOpt("name")
            .hasArg()
            .desc("list files with given name")
            .build();
        Options options = new Options();

        options.addOption(dir);
        options.addOption(name);

        return options;
    }

    public static void main(String[] args) throws Exception {
        Options options = getOptions();
        try {

            CommandLineParser parser = new DefaultParser();

            CommandLine line = parser.parse(options, args);
            File dir = new File(line.getOptionValue("d", "."));
            String name = line.getOptionValue("n", "jar");
            Collection<File> files = FindFile.find(dir, name);
            System.out.println("listing files in " + dir + " containing " + name);
            for (File file : files) {
                System.out.println("\t" + file + "\n");
            }
        } catch (ParseException exp) {
            // oops, something went wrong
            System.err.println("Parsing failed.  Reason: " + exp.getMessage());

            HelpFormatter formatter = new HelpFormatter();
            formatter.printHelp("find", options);
        }
    }

    private Main() {
    }
}