com.codename1.l10n.L10NManager Maven / Gradle / Ivy
/*
* Copyright (c) 2012, Codename One and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Codename One designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Codename One through http://www.codenameone.com/ if you
* need additional information or have any questions.
*/
package com.codename1.l10n;
import com.codename1.io.Util;
import com.codename1.ui.Display;
import java.util.Date;
/**
* The localization manager allows adapting values for display in different locales thru parsing and formatting
* capabilities (similar to JavaSE's DateFormat/NumberFormat). It also includes language/locale/currency
* related API's similar to Locale/currency API's from JavaSE.
* The sample code below just lists the various capabilities of the API:
*
*
* 
*
* @author Shai Almog
*/
public class L10NManager {
private String language;
private String locale;
private DateFormatSymbols symbols;
private DateFormatSymbols getSymbols() {
if (symbols == null) {
symbols = new DateFormatSymbols();
}
return symbols;
}
/**
* Instances of this class should be received via the Display class
*/
protected L10NManager(String language, String locale) {
this.language = language;
this.locale = locale;
}
/**
* Returns the current locale language as an ISO 639 two letter code
*
* @return iso language string
*/
public String getLanguage() {
return language;
}
/**
* Forces the locale/language
*
* @param locale the new locale
* @param language the language to use
*/
public void setLocale(String locale, String language) {
this.language = language;
this.locale = locale;
}
/**
* Format an integer number for this locale
*
* @param number the number to format
* @return a string representation of a number
*/
public String format(int number) {
return "" + number;
}
/**
* Format a double number for this locale
*
* @param number the number to format
* @return a string representation of a number
*/
public String format(double number) {
return "" + number;
}
/**
* Gets the short month name in the current locale for the given date.
* @param date The date.
* @return Short month name. E.g. Jan, Feb, etc..
* @since 7.0
*/
public String getShortMonthName(Date date) {
return limitLength(getLongMonthName(date), 3);
}
/**
* Gets the long month name in the current locale for the given date.
* @param date The date.
* @return Long month name. E.g. January, February, etc..
* @since 7.0
*/
public String getLongMonthName(Date date) {
String fmt = formatDateLongStyle(date);
try {
return extractMonthName(fmt);
} catch (ParseException ex) {
int v = java.util.Calendar.getInstance().get(java.util.Calendar.MONTH) - java.util.Calendar.JANUARY;
return getSymbols().getMonths()[v];
}
}
private String limitLength(String s, int len) {
if(s.length() > len) {
return s.substring(0, len);
}
return s;
}
private String extractMonthName(String dateStr) throws ParseException {
String[] parts = Util.split(dateStr, " ");
for (String part : parts) {
if (part.length() == 0) {
continue;
}
if (part.toLowerCase().equals("de")) {
continue;
}
String firstChar = part.substring(0, 1);
if (!firstChar.toLowerCase().equals(firstChar.toUpperCase())) {
return part;
}
}
throw new ParseException("Cannot extract month from string", 0);
}
/**
* Format a currency value
*
* @param currency the monetary value
* @return a string representation of a number
*/
public String formatCurrency(double currency) {
return "" + currency;
}
/**
* Returns the currency symbol for this locale
*
* @return currency symbol
*/
public String getCurrencySymbol() {
return "$";
}
/**
* Formats a date in a long form e.g. Sunday January 1st 2001
* @param d the date
* @return the long form string
*/
public String formatDateLongStyle(Date d) {
return d.toString();
}
/**
* Formats a date in a short form e.g. 1/1/2011
* @param d the date
* @return the short form string
*/
public String formatDateShortStyle(Date d) {
return d.toString();
}
/**
* Formats a date and a time in a default form e.g. 1/1/2011 10:00AM
* @param d the date
* @return the date and time
*/
public String formatDateTime(Date d) {
return d.toString();
}
/**
* Formats a date and a time in a default form e.g. 1/1/2011 10:00AM
* @param d the date
* @return the date and time
*/
public String formatDateTimeMedium(Date d) {
return d.toString();
}
/**
* Formats the time in a default form e.g. 10:00AM
* @param d the date time object
* @return the time as a String
*/
public String formatTime(Date d) {
String s = formatDateTimeMedium(d);
int pos = s.lastIndexOf(" ");
// this can be just the AM or PM
if(s.length() - pos < 4) {
pos = s.lastIndexOf(" ", pos - 1);
}
s = s.substring(pos + 1);
return s;
}
/**
* Formats a date and a time in a default form e.g. 1/1/2011 10:00AM
* @param d the date
* @return the date and time
*/
public String formatDateTimeShort(Date d) {
return d.toString();
}
/**
* Indicates whether the language is a right to left language
*
* @return true for bidi/rtl languages
*/
public boolean isRTLLocale() {
return "iw".equals(language) || "ar".equals(language);
}
/**
* Determines the locale (location) as an ISO 3166 country code
*
* @return the locale
*/
public String getLocale() {
return locale;
}
/**
* Convenience method that invokes Display.getLocalizationManager()
* @return the L10NManager instance
*/
public static L10NManager getInstance() {
return Display.getInstance().getLocalizationManager();
}
/**
* Formats a number as a String with a fixed number of decimal places
* @param number the number
* @param decimalPlaces decimals
* @return formatted string
*/
public String format(double number, int decimalPlaces) {
if(decimalPlaces == 0) {
return format((double)((long)number));
}
double pos = 10;
for(int iter = 1 ; iter < decimalPlaces ; iter++) {
pos *= 10;
}
long ln = Math.round(number * pos);
number = ((double)ln) / pos;
return format(number);
}
/**
* Parses a double based on locale conventions
* @param localeFormattedDecimal the locale formatted number
* @return the parsed double
*/
public double parseDouble(String localeFormattedDecimal) {
return Double.parseDouble(localeFormattedDecimal);
}
/**
* Parses a long based on locale conventions
* @param localeFormattedLong the number
* @return a long
*/
public long parseLong(String localeFormattedLong) {
return Long.parseLong(localeFormattedLong);
}
/**
* Parses an integer based on locale conventions
*
* @param localeFormattedInteger the number
* @return a parsed number
*/
public int parseInt(String localeFormattedInteger) {
return Integer.parseInt(localeFormattedInteger);
}
/**
* Parses the currency value
* @param amount the amount
* @return a numeric value for the currency
*/
public double parseCurrency(String amount) {
StringBuilder b = new StringBuilder();
int l = amount.length();
for(int iter = 0 ; iter < l ; iter++) {
char c = amount.charAt(iter);
if(Character.isDigit(c) || c == '.' || c == ',' || c == '-') {
b.append(c);
}
}
return parseDouble(b.toString());
}
}