| /* |
| * Copyright (c) 2012, 2013, Oracle 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. Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file: |
| * |
| * Copyright (c) 2008-2012, Stephen Colebourne & Michael Nascimento Santos |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * * Neither the name of JSR-310 nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package java.time.format; |
| |
| import java.text.DecimalFormatSymbols; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Locale; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| /** |
| * Localized decimal style used in date and time formatting. |
| * <p> |
| * A significant part of dealing with dates and times is the localization. |
| * This class acts as a central point for accessing the information. |
| * |
| * @implSpec |
| * This class is immutable and thread-safe. |
| * |
| * @since 1.8 |
| */ |
| public final class DecimalStyle { |
| |
| /** |
| * The standard set of non-localized decimal style symbols. |
| * <p> |
| * This uses standard ASCII characters for zero, positive, negative and a dot for the decimal point. |
| */ |
| public static final DecimalStyle STANDARD = new DecimalStyle('0', '+', '-', '.'); |
| /** |
| * The cache of DecimalStyle instances. |
| */ |
| private static final ConcurrentMap<Locale, DecimalStyle> CACHE = new ConcurrentHashMap<>(16, 0.75f, 2); |
| |
| /** |
| * The zero digit. |
| */ |
| private final char zeroDigit; |
| /** |
| * The positive sign. |
| */ |
| private final char positiveSign; |
| /** |
| * The negative sign. |
| */ |
| private final char negativeSign; |
| /** |
| * The decimal separator. |
| */ |
| private final char decimalSeparator; |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Lists all the locales that are supported. |
| * <p> |
| * The locale 'en_US' will always be present. |
| * |
| * @return a Set of Locales for which localization is supported |
| */ |
| public static Set<Locale> getAvailableLocales() { |
| Locale[] l = DecimalFormatSymbols.getAvailableLocales(); |
| Set<Locale> locales = new HashSet<>(l.length); |
| Collections.addAll(locales, l); |
| return locales; |
| } |
| |
| /** |
| * Obtains the DecimalStyle for the default |
| * {@link java.util.Locale.Category#FORMAT FORMAT} locale. |
| * <p> |
| * This method provides access to locale sensitive decimal style symbols. |
| * <p> |
| * This is equivalent to calling |
| * {@link #of(Locale) |
| * of(Locale.getDefault(Locale.Category.FORMAT))}. |
| * |
| * @see java.util.Locale.Category#FORMAT |
| * @return the decimal style, not null |
| */ |
| public static DecimalStyle ofDefaultLocale() { |
| return of(Locale.getDefault(Locale.Category.FORMAT)); |
| } |
| |
| // Android-changed: Remove "rg" extension support in the javadoc. See http://b/228322300. |
| /** |
| * Obtains the DecimalStyle for the specified locale. |
| * <p> |
| * This method provides access to locale sensitive decimal style symbols. |
| * If the locale contains "nu" (Numbering System) |
| * <a href="../../util/Locale.html#def_locale_extension"> |
| * Unicode extensions</a>, returned instance will reflect the values specified with |
| * those extensions. |
| * |
| * @param locale the locale, not null |
| * @return the decimal style, not null |
| */ |
| public static DecimalStyle of(Locale locale) { |
| Objects.requireNonNull(locale, "locale"); |
| DecimalStyle info = CACHE.get(locale); |
| if (info == null) { |
| info = create(locale); |
| CACHE.putIfAbsent(locale, info); |
| info = CACHE.get(locale); |
| } |
| return info; |
| } |
| |
| private static DecimalStyle create(Locale locale) { |
| DecimalFormatSymbols oldSymbols = DecimalFormatSymbols.getInstance(locale); |
| char zeroDigit = oldSymbols.getZeroDigit(); |
| char positiveSign = '+'; |
| char negativeSign = oldSymbols.getMinusSign(); |
| char decimalSeparator = oldSymbols.getDecimalSeparator(); |
| if (zeroDigit == '0' && negativeSign == '-' && decimalSeparator == '.') { |
| return STANDARD; |
| } |
| return new DecimalStyle(zeroDigit, positiveSign, negativeSign, decimalSeparator); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Restricted constructor. |
| * |
| * @param zeroChar the character to use for the digit of zero |
| * @param positiveSignChar the character to use for the positive sign |
| * @param negativeSignChar the character to use for the negative sign |
| * @param decimalPointChar the character to use for the decimal point |
| */ |
| private DecimalStyle(char zeroChar, char positiveSignChar, char negativeSignChar, char decimalPointChar) { |
| this.zeroDigit = zeroChar; |
| this.positiveSign = positiveSignChar; |
| this.negativeSign = negativeSignChar; |
| this.decimalSeparator = decimalPointChar; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the character that represents zero. |
| * <p> |
| * The character used to represent digits may vary by culture. |
| * This method specifies the zero character to use, which implies the characters for one to nine. |
| * |
| * @return the character for zero |
| */ |
| public char getZeroDigit() { |
| return zeroDigit; |
| } |
| |
| /** |
| * Returns a copy of the info with a new character that represents zero. |
| * <p> |
| * The character used to represent digits may vary by culture. |
| * This method specifies the zero character to use, which implies the characters for one to nine. |
| * |
| * @param zeroDigit the character for zero |
| * @return a copy with a new character that represents zero, not null |
| */ |
| public DecimalStyle withZeroDigit(char zeroDigit) { |
| if (zeroDigit == this.zeroDigit) { |
| return this; |
| } |
| return new DecimalStyle(zeroDigit, positiveSign, negativeSign, decimalSeparator); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the character that represents the positive sign. |
| * <p> |
| * The character used to represent a positive number may vary by culture. |
| * This method specifies the character to use. |
| * |
| * @return the character for the positive sign |
| */ |
| public char getPositiveSign() { |
| return positiveSign; |
| } |
| |
| /** |
| * Returns a copy of the info with a new character that represents the positive sign. |
| * <p> |
| * The character used to represent a positive number may vary by culture. |
| * This method specifies the character to use. |
| * |
| * @param positiveSign the character for the positive sign |
| * @return a copy with a new character that represents the positive sign, not null |
| */ |
| public DecimalStyle withPositiveSign(char positiveSign) { |
| if (positiveSign == this.positiveSign) { |
| return this; |
| } |
| return new DecimalStyle(zeroDigit, positiveSign, negativeSign, decimalSeparator); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the character that represents the negative sign. |
| * <p> |
| * The character used to represent a negative number may vary by culture. |
| * This method specifies the character to use. |
| * |
| * @return the character for the negative sign |
| */ |
| public char getNegativeSign() { |
| return negativeSign; |
| } |
| |
| /** |
| * Returns a copy of the info with a new character that represents the negative sign. |
| * <p> |
| * The character used to represent a negative number may vary by culture. |
| * This method specifies the character to use. |
| * |
| * @param negativeSign the character for the negative sign |
| * @return a copy with a new character that represents the negative sign, not null |
| */ |
| public DecimalStyle withNegativeSign(char negativeSign) { |
| if (negativeSign == this.negativeSign) { |
| return this; |
| } |
| return new DecimalStyle(zeroDigit, positiveSign, negativeSign, decimalSeparator); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Gets the character that represents the decimal point. |
| * <p> |
| * The character used to represent a decimal point may vary by culture. |
| * This method specifies the character to use. |
| * |
| * @return the character for the decimal point |
| */ |
| public char getDecimalSeparator() { |
| return decimalSeparator; |
| } |
| |
| /** |
| * Returns a copy of the info with a new character that represents the decimal point. |
| * <p> |
| * The character used to represent a decimal point may vary by culture. |
| * This method specifies the character to use. |
| * |
| * @param decimalSeparator the character for the decimal point |
| * @return a copy with a new character that represents the decimal point, not null |
| */ |
| public DecimalStyle withDecimalSeparator(char decimalSeparator) { |
| if (decimalSeparator == this.decimalSeparator) { |
| return this; |
| } |
| return new DecimalStyle(zeroDigit, positiveSign, negativeSign, decimalSeparator); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks whether the character is a digit, based on the currently set zero character. |
| * |
| * @param ch the character to check |
| * @return the value, 0 to 9, of the character, or -1 if not a digit |
| */ |
| int convertToDigit(char ch) { |
| int val = ch - zeroDigit; |
| return (val >= 0 && val <= 9) ? val : -1; |
| } |
| |
| /** |
| * Converts the input numeric text to the internationalized form using the zero character. |
| * |
| * @param numericText the text, consisting of digits 0 to 9, to convert, not null |
| * @return the internationalized text, not null |
| */ |
| String convertNumberToI18N(String numericText) { |
| if (zeroDigit == '0') { |
| return numericText; |
| } |
| int diff = zeroDigit - '0'; |
| char[] array = numericText.toCharArray(); |
| for (int i = 0; i < array.length; i++) { |
| array[i] = (char) (array[i] + diff); |
| } |
| return new String(array); |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Checks if this DecimalStyle is equal to another DecimalStyle. |
| * |
| * @param obj the object to check, null returns false |
| * @return true if this is equal to the other date |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| return (obj instanceof DecimalStyle other |
| && zeroDigit == other.zeroDigit |
| && positiveSign == other.positiveSign |
| && negativeSign == other.negativeSign |
| && decimalSeparator == other.decimalSeparator); |
| } |
| |
| /** |
| * A hash code for this DecimalStyle. |
| * |
| * @return a suitable hash code |
| */ |
| @Override |
| public int hashCode() { |
| return zeroDigit + positiveSign + negativeSign + decimalSeparator; |
| } |
| |
| //----------------------------------------------------------------------- |
| /** |
| * Returns a string describing this DecimalStyle. |
| * |
| * @return a string description, not null |
| */ |
| @Override |
| public String toString() { |
| return "DecimalStyle[" + zeroDigit + positiveSign + negativeSign + decimalSeparator + "]"; |
| } |
| |
| } |
