org.graalvm.shadowed.com.ibm.icu.impl.number

Class PatternStringUtils

java.lang.Object

org.graalvm.shadowed.com.ibm.icu.impl.number.PatternStringUtils

public class PatternStringUtils
extends Object

Assorted utilities relating to decimal formatting pattern strings.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PatternStringUtils.PatternSignType

Constructor Summary

Constructors

Constructor and Description
PatternStringUtils()

Method Summary

Modifier and Type	Method and Description
static String	convertLocalized(String input, DecimalFormatSymbols symbols, boolean toLocalized) Converts a pattern between standard notation and localized notation.
static boolean	ignoreRoundingIncrement(BigDecimal roundIncrDec, int maxFrac) Determine whether a given roundingIncrement should be ignored for formatting based on the current maxFrac value (maximum fraction digits).
static void	patternInfoToStringBuilder(AffixPatternProvider patternInfo, boolean isPrefix, PatternStringUtils.PatternSignType patternSignType, boolean approximately, StandardPlural plural, boolean perMilleReplacesPercent, StringBuilder output) This method contains the heart of the logic for rendering LDML affix strings.
static String	propertiesToPatternString(DecimalFormatProperties properties) Creates a pattern string from a property bag.
static PatternStringUtils.PatternSignType	resolveSignDisplay(NumberFormatter.SignDisplay signDisplay, Modifier.Signum signum)

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PatternStringUtils

public PatternStringUtils()

Method Detail

ignoreRoundingIncrement

public static boolean ignoreRoundingIncrement(BigDecimal roundIncrDec,
                                              int maxFrac)

Determine whether a given roundingIncrement should be ignored for formatting based on the current maxFrac value (maximum fraction digits). For example a roundingIncrement of 0.01 should be ignored if maxFrac is 1, but not if maxFrac is 2 or more. Note that roundingIncrements are rounded up in significance, so a roundingIncrement of 0.006 is treated like 0.01 for this determination, i.e. it should not be ignored if maxFrac is 2 or more (but a roundingIncrement of 0.005 is treated like 0.001 for significance). This test is needed for both NumberPropertyMapper.oldToNew and PatternStringUtils.propertiesToPatternString, but NumberPropertyMapper is package-private so we have it here.

Parameters:

roundIncrDec - The roundingIncrement to be checked. Must be non-null.

maxFrac - The current maximum fraction digits value.

Returns:

true if roundIncr should be ignored for formatting.

propertiesToPatternString

public static String propertiesToPatternString(DecimalFormatProperties properties)

Creates a pattern string from a property bag.

Since pattern strings support only a subset of the functionality available in a property bag, a new property bag created from the string returned by this function may not be the same as the original property bag.

Parameters:

properties - The property bag to serialize.

Returns:

A pattern string approximately serializing the property bag.

convertLocalized

public static String convertLocalized(String input,
                                      DecimalFormatSymbols symbols,
                                      boolean toLocalized)

Converts a pattern between standard notation and localized notation. Localized notation means that instead of using generic placeholders in the pattern, you use the corresponding locale-specific characters instead. For example, in locale fr-FR, the period in the pattern "0.000" means "decimal" in standard notation (as it does in every other locale), but it means "grouping" in localized notation.

A greedy string-substitution strategy is used to substitute locale symbols. If two symbols are ambiguous or have the same prefix, the result is not well-defined.

Locale symbols are not allowed to contain the ASCII quote character.

This method is provided for backwards compatibility and should not be used in any new code.

Parameters:

input - The pattern to convert.

symbols - The symbols corresponding to the localized pattern.

toLocalized - true to convert from standard to localized notation; false to convert from localized to standard notation.

Returns:

The pattern expressed in the other notation.

patternInfoToStringBuilder

public static void patternInfoToStringBuilder(AffixPatternProvider patternInfo,
                                              boolean isPrefix,
                                              PatternStringUtils.PatternSignType patternSignType,
                                              boolean approximately,
                                              StandardPlural plural,
                                              boolean perMilleReplacesPercent,
                                              StringBuilder output)

This method contains the heart of the logic for rendering LDML affix strings. It handles sign-always-shown resolution, whether to use the positive or negative subpattern, permille substitution, and plural forms for CurrencyPluralInfo.

resolveSignDisplay

public static PatternStringUtils.PatternSignType resolveSignDisplay(NumberFormatter.SignDisplay signDisplay,
                                                                    Modifier.Signum signum)