JDK 11 java.base.jmod - Base Module
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⏎ java/time/format/DecimalStyle.java
/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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/*
*
*
*
*
*
* 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.
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* * 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));
}
/**
* 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) and/or "rg"
* (Region Override) <a href="../../util/Locale.html#def_locale_extension">
* Unicode extensions</a>, returned instance will reflect the values specified with
* those extensions. If both "nu" and "rg" are specified, the value from
* the "nu" extension supersedes the implicit one from the "rg" extension.
*
* @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;
}
if (obj instanceof DecimalStyle) {
DecimalStyle other = (DecimalStyle) obj;
return (zeroDigit == other.zeroDigit && positiveSign == other.positiveSign &&
negativeSign == other.negativeSign && decimalSeparator == other.decimalSeparator);
}
return false;
}
/**
* 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 + "]";
}
}
⏎ java/time/format/DecimalStyle.java
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