org.jini.commands.info.ListRoots.java Source code

Introduction

Here is the source code for org.jini.commands.info.ListRoots.java

Source

/*
New BSD License
Copyright (c) 2012, Norman David <normandavid67@gmail.com>
All rights reserved.
    
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.
* Neither the name of the <organization> nor the
  names of its contributors may be used to endorse or promote products
  derived from this software without specific prior written permission.
    
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL Norman David BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     
      
 For a copy of the License type 'license'
 */
package org.jini.commands.info;

import java.io.File;
import java.text.DecimalFormat;
import jinicommands.JiniCmd;
import org.apache.commons.cli.BasicParser;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.jini.commands.helper.FileSize;
import org.jini.commands.helper.TablePrinter;

/**
 * List Roots
 *
 * @author Norman David <normandavid67@gmail.com>
 * @since JiniCommands version 0.1
 * @version 1.0
 */
public class ListRoots extends JiniCmd {

    CommandLineParser jcParser = new BasicParser();
    Options jcOptions = new Options();
    private boolean done;
    FileSize fileSize = new FileSize();

    public ListRoots() {
    }

    /**
     * In this method all the specific Command Line options are defined.
     *
     */
    @Override
    @SuppressWarnings("static-access")
    public void setJCLIOptions() {
        Option Help = new Option("h", "help", false, "Show Help.");
        this.jcOptions.addOption(Help);
        this.jcOptions.addOption(OptionBuilder.withLongOpt("search").withDescription("Search").isRequired(false)
                .hasArg().create("s"));

    }

    /**
     * In this method all the execution of the specific Command takes place
     */
    @Override
    public void executeCommand() {
        this.setJCLIOptions();
        String args[] = this.convertToArray();
        try {
            CommandLine jcCmd = this.jcParser.parse(this.jcOptions, args);

            if (jcCmd.hasOption('h')) {
                printHelp();
            }

            if (this.done == false) {
                this.printRoots();
            }

        } catch (org.apache.commons.cli.ParseException ex) {
            this.setJcError(true);
            this.addErrorMessages("Error :" + ex.getMessage());
        }
    }

    /**
     * Prints out all Command Line Options in a table
     *
     */
    private void printHelp() {
        TablePrinter helpTableHead = new TablePrinter("Command Name : ", "listroots / listdrives");
        helpTableHead.addRow("SYNOPSIS : ", "listroots [OPTION]...");
        helpTableHead.addRow("DESCRIPTION : ", "List Roots. UNIX file systems have a single root i.e /, ");
        helpTableHead.addRow(" ",
                "On Windows, each drive is a root. For example the C drive is represented by the root C:\\ ");
        helpTableHead.print();
        TablePrinter helpTable = new TablePrinter("Short Opt", "Long Opt", "Argument", "Desc",
                "Short Option Example", "Long Option Example");
        helpTable.addRow("-h", "--help", "not required", "Show this help.", "listroots -h", "listroots --help");

        helpTable.print();

        this.done = true;
    }

    private void printRoots() {
        TablePrinter tableF = new TablePrinter("Name", "TotalSpace (GB)", "FreeSpace (GB)");
        DecimalFormat df = new DecimalFormat("#######.##");

        File[] roots = File.listRoots();
        for (int i = 0; i < roots.length; i++) {
            long freeSpaceBytes = roots[i].getFreeSpace();
            long totalSpaceBytes = roots[i].getTotalSpace();
            tableF.addRow(roots[i].toString(), df.format(fileSize.convertBytesToGigabytes(freeSpaceBytes)),
                    df.format(fileSize.convertBytesToGigabytes(totalSpaceBytes)));
        }

        tableF.print();
    }
}