Android Open Source - coursera-android-pos Options

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License

The source code is released under:

MIT License

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Java Source Code

package edu.vuum.mocca;
/* w  ww .j  a v a  2s  . co  m*/
import java.io.File;
import java.nio.*;
import java.util.*;

/**
 * @class Options
 * 
 * @brief This class implements the Singleton pattern to handle
 *        command-line option processing.
 */
public class Options
{
    /** The singleton @a Options instance. */
    private static Options mUniqueInstance = null;

    /** Maximum number of iterations to run the program (defaults to 10). */
    private int mMaxIterations = 10;

    /** Maximum number of iterations per "turn" (defaults to 1). */
    private int mMaxTurns = 1;

    /**
     * Which synchronization to use, e.g., "SEMA" vs. "COND".
     * Defaults to "SEMA".
     */
    private String mSyncMechanism = "SEMA";

    /** Method to return the one and only singleton uniqueInstance. */
    public static Options instance()
    {
        if (mUniqueInstance == null)
            mUniqueInstance = new Options();

        return mUniqueInstance;
    }

    /** Number of iterations to run the program. */
    public int maxIterations()
    {
        return mMaxIterations;
    }

    /** Number of iterations to run the program. */
    public int maxTurns()
    {
        return mMaxTurns;
    }

    /**
     * Which synchronization to use, e.g., "SEMA" vs. "COND".
     * Defaults to "SEMA".
     */
    public String syncMechanism()
    {
        return mSyncMechanism;
    }

    /**
     * Parse command-line arguments and set the appropriate values.
     */
    public boolean parseArgs(String argv[])
    {
        for (int argc = 0; argc < argv.length; argc += 2)
            if (argv[argc].equals("-i"))
                mMaxIterations = Integer.parseInt(argv[argc + 1]);
            else if (argv[argc].equals("-s"))
                mSyncMechanism = argv[argc + 1];
            else if (argv[argc].equals("-t"))
                mMaxTurns = Integer.parseInt(argv[argc + 1]);
            else
                {
                    printUsage();
                    return false;
                }

        return true;
    }

    /** Print out usage and default values. */
    public void printUsage()
    {
        PlatformStrategy platform = PlatformStrategy.instance();
        platform.errorLog("Options", "\nHelp Invoked on ");
        platform.errorLog("Options", "[-hist] ");
        platform.errorLog("", "");
        platform.errorLog("", "");

        platform.errorLog("Options", "Usage: ");
        platform.errorLog("Options", "-h: invoke help ");
        platform.errorLog("Options", "-i max-number-of-iterations ");
        platform.errorLog("Options", "-s sync-mechanism (e.g., \"SEMA\" or \"COND\"");
        platform.errorLog("Options", "-t max-number-of-turns");
    }

    /**
     * Make the constructor private for a singleton.
     */
    private Options()
    {
    }
}

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