// -----------------------------------------------------------------------------
// PropertyFiles.java
// -----------------------------------------------------------------------------

/*
 * =============================================================================
 * Copyright (c) 1998-2011 Jeffrey M. Hunter. All rights reserved.
 * 
 * All source code and material located at the Internet address of
 * http://www.idevelopment.info is the copyright of Jeffrey M. Hunter and
 * is protected under copyright laws of the United States. This source code may
 * not be hosted on any other site without my express, prior, written
 * permission. Application to host any of the material elsewhere can be made by
 * contacting me at jhunter@idevelopment.info.
 *
 * I have made every effort and taken great care in making sure that the source
 * code and other content included on my web site is technically accurate, but I
 * disclaim any and all responsibility for any loss, damage or destruction of
 * data or any other property which may arise from relying on it. I will in no
 * case be liable for any monetary damages arising from such loss, damage or
 * destruction.
 * 
 * As with any code, ensure to test this code in a development environment 
 * before attempting to run it in production.
 * =============================================================================
 */
 
import java.util.Properties;
import java.util.Enumeration;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.FileOutputStream;
import java.io.FileInputStream;

/**
 * -----------------------------------------------------------------------------
 * Used to provide an example of how to get/set Properties and load/save
 * property files.
 * 
 * @version 1.0
 * @author  Jeffrey M. Hunter  (jhunter@idevelopment.info)
 * @author  http://www.idevelopment.info
 * -----------------------------------------------------------------------------
 */

public class PropertyFiles {


    private static Properties createDefaultProperties() {

        Properties tempProp = new Properties();

        tempProp.setProperty("company_name", "iDevelopment, Inc.");
        tempProp.setProperty("company_domain", "idevelopment.info");
        tempProp.setProperty("global_database_name", "TRUESRC_SUNDEV5.IDEVELOPMENT.INFO");
        tempProp.setProperty("oracle_sid", "TRUESRC");
        tempProp.setProperty("listener_port", "1521");
        tempProp.setProperty("database_server", "sundev5.idevelopment.info");
        tempProp.setProperty("truesourceAdminUsername", "ts_admin");
        tempProp.setProperty("truesource_admin_password", "ts_adm1n");
        tempProp.setProperty("truesource_guest_username", "ts_guest");
        tempProp.setProperty("truesource_guest_password", "ts_gu3st");
        tempProp.setProperty("log_level", "9");
        tempProp.setProperty("database_oid", "99745190543");
        tempProp.setProperty("fake_entry", "000000000000");
        return tempProp;

    }


    private static void printProperties(Properties p, String s) {

        System.out.println();
        System.out.println("========================================");
        System.out.println(s);
        System.out.println("========================================");
        System.out.println("+---------------------------------------+");
        System.out.println("| Print Application Properties          |");
        System.out.println("+---------------------------------------+");
        p.list(System.out);
        System.out.println();
    }


    private static void saveProperties(Properties p, String fileName) {

        OutputStream propsFile;

        try {
            propsFile = new FileOutputStream(fileName);
            p.store(propsFile, "Properties File to the Test Application");
            propsFile.close();
        } catch (IOException ioe) {
            System.out.println("I/O Exception.");
            ioe.printStackTrace();
            System.exit(0);
        }

    }


    private static Properties loadProperties(String fileName) {

        InputStream propsFile;
        Properties tempProp = new Properties();

        try {
            propsFile = new FileInputStream(fileName);
            tempProp.load(propsFile);
            propsFile.close();
        } catch (IOException ioe) {
            System.out.println("I/O Exception.");
            ioe.printStackTrace();
            System.exit(0);
        }

        return tempProp;

    }


    private static Properties alterProperties(Properties p) {

        Properties newProps = new Properties();
        Enumeration enProps = p.propertyNames();
        String key = "";

        while ( enProps.hasMoreElements() ) {

            key = (String) enProps.nextElement();

            // If we were going to use the "log_level" or "database_oid" key in 
            // our application, we would want to cast the value to an Integer or
            // Long.
            //   log_level    = Integer.parseInt(props.getProperty("log_level"));
            //   database_oid = Long.parseLong(props.getProperty("database_oid"));

            if (!key.equals("fake_entry")) {
                if (key.equals("log_level")) {
                    newProps.setProperty(key, "3");
                } else {
                    newProps.setProperty(key, p.getProperty(key));
                }
            }

        }

        return newProps;

    }


    /**
     * Sole entry point to the class and application.
     * @param args Array of String arguments.
     */
    public static void main(String[] args) {

        final String PROPFILE= "Application.properties";
        Properties myProp;
        Properties myNewProp;

        myProp = createDefaultProperties();
        printProperties(myProp, "Newly Created (Default) Properties");
        saveProperties(myProp, PROPFILE);
        myNewProp = loadProperties(PROPFILE);
        printProperties(myNewProp, "Loaded Properties");
        myNewProp = alterProperties(myProp);
        printProperties(myNewProp, "After Altering Properties");
        saveProperties(myNewProp, PROPFILE);

    }

}