Util.java

package br.ufpr.c3sl.util;

import java.awt.Canvas;
import java.awt.Component;
import java.awt.Container;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.ImageIcon;

import br.ufpr.c3sl.state.SaveState;

/**
 * CARRIE Framework
 * class Util of CARRIE framework
 * @author  Diego Marczal
 * @version Outubro 16, 2010
 */ 
public class Util {

	private static final String ICONS_PATH = "/br/ufpr/c3sl/icons/";
	public static final String GLOSSARY_PATH = "/br/ufpr/c3sl/glossary/glossary.glo";
	
	/**
	 * CARRIE Framework
	 * @param kclass Class to get URL path
	 * @param imgName name of the icon, the extension is png
	 */ 
	public static java.net.URL getIconURL(Class<?> kclass, String imgName) {
		java.net.URL imgURL = getPath(kclass, ICONS_PATH + imgName + ".png");
		if (imgURL != null) {
			return imgURL;
		} else {
			System.err.println("Couldn't find file: " + ICONS_PATH + imgName + ".png");
			return null;
		}
	}

	/**
	 * CARRIE Framework
	 * Get Full path of a file
	 * @param kclass Class to get URL path
	 * @param imgName name of the icon, the extension is png
	 * @return  URL path
	 * 			or null if the file not exists 
	 */ 
	public static URL getPath(Class<?> clazz, String path){
		URL fileURL = clazz.getResource(path);
		if (fileURL != null) {
			return fileURL;
		} else {
			System.err.println("Couldn't find file: " + path);
			return null;
		}
	}

	/**
	 * get Image Icon
	 * @param kclass Class to get image icon
	 * @param imgName name of the icon, the extension is png
	 */ 
	public static ImageIcon getImageIcon(Class<?> kclass, String iconName) {
		return new ImageIcon(getIconURL(kclass, iconName));
	}

	/**
	 * validate Email
	 * @param email the email address
	 * @return true if email is valid
	 * 		   false if email is not valid	
	 */ 
	public static boolean validateEmail(String email){
		Pattern p = Pattern.compile(".+@.+\\.[a-z]+");
		Matcher m = p.matcher(email);
		return m.matches();
	}

	/**
	 * update Static Fields of the one container
	 * @param container the container that need to be update 
	 */
	public static void updateStaticFields(Container container){
		for (Component c : container.getComponents()) {
			if (c instanceof SaveState)
				((SaveState) c).buildEventsAndTransientvariables();

			if (!(c instanceof Canvas))
				updateStaticFields((Container)c);
		}
	}
	
	public static String getTextFromFile(Class<?> kclass, String filepath){
		URL url = Util.getPath(kclass, filepath);
		URLConnection urlcon;
		try {
			urlcon = url.openConnection();
			BufferedReader input = new BufferedReader(new InputStreamReader(urlcon.getInputStream(), "UTF-8"));
			StringBuffer content = new StringBuffer();

			String line = "";
			while ((line = input.readLine()) != null) {
				content.append(line);
			}
			
			return content.toString();
		} catch (Exception e) {
			new Exception("Can't find file in: "+ filepath).printStackTrace();
		}
		return "";
	}
	
	/**
	 * Format Date and Time
	 * For example from 2010-12-18 21:51:00
	 * to Dom 18 Nov 2010 9:51:00 pm
	 * @parm time the time that will be format
	 * @return date String formt date
	 */ 
	public static String getDateTimeFormated(Timestamp time){
		String[] months = {"Jan", "Fev", "Mar",
						   "Abr", "Mai", "Jun",
						   "Jul", "Ago", "Set",
						   "Out", "Nov", "Dez"};
		
		String[] daysOfWeek = {"Dom", "Seg", "Ter", "Qua", "Qui", "Sex", "Sáb"};
		
		SimpleDateFormat hourFormat = new SimpleDateFormat("hh:mm:ss");
		Calendar calendar = new GregorianCalendar();
		calendar.setTime(time);
		
		String formatDate = " " + daysOfWeek[calendar.get(Calendar.DAY_OF_WEEK)-1]  
		                              		  + " " + calendar.get(Calendar.DAY_OF_MONTH) + " "  
		                                      + months[calendar.get(Calendar.MONTH)] + " "   
		                                      + calendar.get(Calendar.YEAR) + " "   
		                                      + hourFormat.format(calendar.getTime()) + " " 
		                                      + ((calendar.get(Calendar.AM_PM) ==  0) ? "am" :"pm");  
		return formatDate; 
	}
}