com.fjn.helper.frameworkex.apache.commons.cli.Ls.java Source code

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/*
 *
 *  Copyright 2018 FJN Corp.
 *
 *  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.
 *
 *  Author                        Date                       Issue
 *  fs1194361820@163.com          2015-01-01                 Initial Version
 *
 */

package com.fjn.helper.frameworkex.apache.commons.cli;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.junit.BeforeClass;
import org.junit.Test;

/**
 * Usage: ls [OPTION]... [FILE]...<br>
 * List information about the FILEs (the current directory by default).<br>
 * Sort entries alphabetically if none of -cftuSUX nor --sort.<br>
 * <br>
 * -a, --all do not hide entries starting with .<br>
 * -A, --almost-all do not list implied . and ..<br>
 * -b, --escape print octal escapes for nongraphic characters<br>
 * --block-size=SIZE use SIZE-byte blocks<br>
 * -B, --ignore-backups do not list implied entries ending with ~<br>
 * -c with -lt: sort by, and show, ctime (time of last modification of file
 * status information) with -l: show ctime and sort by name otherwise: sort by
 * ctime -C list entries by columns<br>
 *
 * @author fs1194361820@163.com
 *
 */
public class Ls {
    static Options options = new Options();

    @BeforeClass
    public static void initOptions() {
        options.addOption("a", "all", false, "do not hide entries starting with .");
        options.addOption(new Option("A", "almost-all", false, "do not list implied . and .."));
        options.addOption("b", "escape", false, "print octal escapes for nongraphic " + "characters");
        options.addOption(Option.builder("").longOpt("block-size").desc("use SIZE-byte blocks").hasArg()
                .argName("SIZE").build());
        options.addOption("B", "ignore-backups", false, "do not list implied entried " + "ending with ~");
        options.addOption("c", false,
                "with -lt: sort by, and show, ctime (time of last "
                        + "modification of file status information) with "
                        + "-l:show ctime and sort by name otherwise: sort " + "by ctime");
        options.addOption("C", false, "list entries by columns");

    }

    @Test
    public void test() throws ParseException {
        CommandLineParser parser = new DefaultParser();
        String[] args = new String[] { "--block-size=10" };
        CommandLine line = parser.parse(options, args);

        // validate that block-size has been set
        if (line.hasOption("block-size")) {
            // print the value of block-size
            System.out.println(line.getOptionValue("block-size"));
        }
    }
}