Subversion Repositories programming

/*******************************************************************************

 * ConfigParser.java

 *

 * Holds the ConfigParser class, which automatically parses the given

 * configuration file.

 *

 * Copyright (c) 2006, Ira W. Snyder (devel@irasnyder.com)

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 ******************************************************************************/

import java.io.*;

import java.lang.String;

import java.util.Vector;

/**

 * Automatic parser for the CS431 Project #1 configuration format. This will

 * read from the keyboard unless a filename is given.

 *

 * @class CS431 Spring 2006

 * @author Ira W. Snyder (devel@irasnyder.com)

 */

public class ConfigParser

{

    /** Current input device: keyboard or file */

    private BufferedReader input;

    /** Flag specifying the input type */

    private boolean kbd_input = false;

    /** The Round Robin Interval listed in the configuration */

    private int RRInterval;

    /** The Processes that were listed in the configuration */

    private Vector<Process> Processes = new Vector<Process> ();

    /**

     * Constructor for the ConfigParser class. This is the default constructor,

     * which will read from the keyboard.

     */

    public ConfigParser ()

    {

        input = new BufferedReader (

                    new InputStreamReader (System.in));

        kbd_input = true;

        parse ();

    }

    /**

     * Constructor for the the ConfigParser class. This constructor reads its

     * input from a file.

     *

     * @param filename the file to read input from

     */

    public ConfigParser (String filename)

    {

        try

        {

            input = new BufferedReader (

                        new InputStreamReader (

                            new FileInputStream (filename)));

        }

        catch (java.io.FileNotFoundException e)

        {

            System.err.println ("Input file: " + filename + " not found!");

            System.exit (1);

        }

        parse ();

    }

    /**

     * Read all values via the current input method, and store them so that

     * they can be read later.

     * <p>

     * This method is automatically called by the constructors of this class.

     */

    private void parse ()

    {

        String s = null;

        int ptime;

        String pname;

        try

        {

            /* Read the RR Interval */

            s = input.readLine ();

            this.RRInterval = Integer.parseInt (s);

            /* Read each process' values */

            pname = input.readLine ();

            while (pname != null)

            {

                ptime = Integer.parseInt (input.readLine ());

                Processes.add (new Process (pname, ptime));

                /* Read the next Process name */

                pname = input.readLine ();

            }

        }

        catch (java.io.IOException e)

        {

            System.err.println ("Error reading file!");

            System.exit (2);

        }

    }

    /**

     * Accessor method for the private variable Processes.

     * <p>

     * NOTE: this is NOT a copy, so don't modify this! Make a copy first.

     *

     * @return the private variable Processes.

     */

    public Vector<Process> getProcesses ()

    {

        return this.Processes;

    }

    /**

     * Accessor method for the private variable RRInterval.

     *

     * @return the Round Robin Interval from the configuration file

     */

    public int getRRInterval ()

    {

        return this.RRInterval;

    }

}

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