icu4j/main/classes/core/src/com/ibm/icu/impl/number/MutablePatternModifier.java - external/github.com/unicode-org/icu - Git at Google

 // © 2017 and later: Unicode, Inc. and others.
 // License & terms of use: http://www.unicode.org/copyright.html#License
 package com.ibm.icu.impl.number;

 import com.ibm.icu.impl.FormattedStringBuilder;
 import com.ibm.icu.impl.StandardPlural;
 import com.ibm.icu.impl.number.AffixUtils.SymbolProvider;
 import com.ibm.icu.number.NumberFormatter.SignDisplay;
 import com.ibm.icu.number.NumberFormatter.UnitWidth;
 import com.ibm.icu.text.DecimalFormatSymbols;
 import com.ibm.icu.text.NumberFormat.Field;
 import com.ibm.icu.text.PluralRules;
 import com.ibm.icu.util.Currency;

 /**
  * This class is a {@link Modifier} that wraps a decimal format pattern. It applies the pattern's affixes
  * in {@link Modifier#apply}.
  *
  * <p>
  * In addition to being a Modifier, this class contains the business logic for substituting the correct
  * locale symbols into the affixes of the decimal format pattern.
  *
  * <p>
  * In order to use this class, create a new instance and call the following four setters:
  * {@link #setPatternInfo}, {@link #setPatternAttributes}, {@link #setSymbols}, and
  * {@link #setNumberProperties}. After calling these four setters, the instance will be ready for use as
  * a Modifier.
  *
  * <p>
  * This is a MUTABLE, NON-THREAD-SAFE class designed for performance. Do NOT save references to this or
  * attempt to use it from multiple threads! Instead, you can obtain a safe, immutable decimal format
  * pattern modifier by calling {@link MutablePatternModifier#createImmutable}, in effect treating this
  * instance as a builder for the immutable variant.
  */
 public class MutablePatternModifier implements Modifier, SymbolProvider, MicroPropsGenerator {

     // Modifier details
     final boolean isStrong;

     // Pattern details
     AffixPatternProvider patternInfo;
     Field field;
     SignDisplay signDisplay;
     boolean perMilleReplacesPercent;

     // Symbol details
     DecimalFormatSymbols symbols;
     UnitWidth unitWidth;
     Currency currency;
     PluralRules rules;

     // Number details
     Signum signum;
     StandardPlural plural;

     // QuantityChain details
     MicroPropsGenerator parent;

     // Transient fields for rendering
     StringBuilder currentAffix;

     /**
      * @param isStrong
      *            Whether the modifier should be considered strong. For more information, see
      *            {@link Modifier#isStrong()}. Most of the time, decimal format pattern modifiers should
      *            be considered as non-strong.
      */
     public MutablePatternModifier(boolean isStrong) {
         this.isStrong = isStrong;
     }

     /**
      * Sets a reference to the parsed decimal format pattern, usually obtained from
      * {@link PatternStringParser#parseToPatternInfo(String)}, but any implementation of
      * {@link AffixPatternProvider} is accepted.
      *
      * @param field
      *            Which field to use for literal characters in the pattern.
      */
     public void setPatternInfo(AffixPatternProvider patternInfo, Field field) {
         this.patternInfo = patternInfo;
         this.field = field;
     }

     /**
      * Sets attributes that imply changes to the literal interpretation of the pattern string affixes.
      *
      * @param signDisplay
      *            Whether to force a plus sign on positive numbers.
      * @param perMille
      *            Whether to substitute the percent sign in the pattern with a permille sign.
      */
     public void setPatternAttributes(SignDisplay signDisplay, boolean perMille) {
         this.signDisplay = signDisplay;
         this.perMilleReplacesPercent = perMille;
     }

     /**
      * Sets locale-specific details that affect the symbols substituted into the pattern string affixes.
      *
      * @param symbols
      *            The desired instance of DecimalFormatSymbols.
      * @param currency
      *            The currency to be used when substituting currency values into the affixes.
      * @param unitWidth
      *            The width used to render currencies.
      * @param rules
      *            Required if the triple currency sign, "¤¤¤", appears in the pattern, which can be
      *            determined from the convenience method {@link #needsPlurals()}.
      */
     public void setSymbols(
             DecimalFormatSymbols symbols,
             Currency currency,
             UnitWidth unitWidth,
             PluralRules rules) {
         assert (rules != null) == needsPlurals();
         this.symbols = symbols;
         this.currency = currency;
         this.unitWidth = unitWidth;
         this.rules = rules;
     }

     /**
      * Sets attributes of the current number being processed.
      *
      * @param signum
      *            -1 if negative; +1 if positive; or 0 if zero.
      * @param plural
      *            The plural form of the number, required only if the pattern contains the triple
      *            currency sign, "¤¤¤" (and as indicated by {@link #needsPlurals()}).
      */
     public void setNumberProperties(Signum signum, StandardPlural plural) {
         assert (plural != null) == needsPlurals();
         this.signum = signum;
         this.plural = plural;
     }

     /**
      * Returns true if the pattern represented by this MurkyModifier requires a plural keyword in order
      * to localize. This is currently true only if there is a currency long name placeholder in the
      * pattern ("¤¤¤").
      */
     public boolean needsPlurals() {
         return patternInfo.containsSymbolType(AffixUtils.TYPE_CURRENCY_TRIPLE);
     }

     /**
      * Creates a new quantity-dependent Modifier that behaves the same as the current instance, but which
      * is immutable and can be saved for future use. The number properties in the current instance are
      * mutated; all other properties are left untouched.
      *
      * <p>
      * The resulting modifier cannot be used in a QuantityChain.
      *
      * @return An immutable that supports both positive and negative numbers.
      */
     public ImmutablePatternModifier createImmutable() {
         FormattedStringBuilder a = new FormattedStringBuilder();
         FormattedStringBuilder b = new FormattedStringBuilder();
         if (needsPlurals()) {
             // Slower path when we require the plural keyword.
             AdoptingModifierStore pm = new AdoptingModifierStore();
             for (StandardPlural plural : StandardPlural.VALUES) {
                 setNumberProperties(Signum.POS, plural);
                 pm.setModifier(Signum.POS, plural, createConstantModifier(a, b));
                 setNumberProperties(Signum.POS_ZERO, plural);
                 pm.setModifier(Signum.POS_ZERO, plural, createConstantModifier(a, b));
                 setNumberProperties(Signum.NEG_ZERO, plural);
                 pm.setModifier(Signum.NEG_ZERO, plural, createConstantModifier(a, b));
                 setNumberProperties(Signum.NEG, plural);
                 pm.setModifier(Signum.NEG, plural, createConstantModifier(a, b));
             }
             pm.freeze();
             return new ImmutablePatternModifier(pm, rules);
         } else {
             // Faster path when plural keyword is not needed.
             setNumberProperties(Signum.POS, null);
             Modifier positive = createConstantModifier(a, b);
             setNumberProperties(Signum.POS_ZERO, null);
             Modifier posZero = createConstantModifier(a, b);
             setNumberProperties(Signum.NEG_ZERO, null);
             Modifier negZero = createConstantModifier(a, b);
             setNumberProperties(Signum.NEG, null);
             Modifier negative = createConstantModifier(a, b);
             AdoptingModifierStore pm = new AdoptingModifierStore(positive, posZero, negZero, negative);
             return new ImmutablePatternModifier(pm, null);
         }
     }

     /**
      * Uses the current properties to create a single {@link ConstantMultiFieldModifier} with currency
      * spacing support if required.
      *
      * @param a
      *            A working FormattedStringBuilder object; passed from the outside to prevent the need to
      *            create many new instances if this method is called in a loop.
      * @param b
      *            Another working FormattedStringBuilder object.
      * @return The constant modifier object.
      */
     private ConstantMultiFieldModifier createConstantModifier(
             FormattedStringBuilder a,
             FormattedStringBuilder b) {
         insertPrefix(a.clear(), 0);
         insertSuffix(b.clear(), 0);
         if (patternInfo.hasCurrencySign()) {
             return new CurrencySpacingEnabledModifier(a, b, !patternInfo.hasBody(), isStrong, symbols);
         } else {
             return new ConstantMultiFieldModifier(a, b, !patternInfo.hasBody(), isStrong);
         }
     }

     public static class ImmutablePatternModifier implements MicroPropsGenerator {
         final AdoptingModifierStore pm;
         final PluralRules rules;
         /* final */ MicroPropsGenerator parent;

         ImmutablePatternModifier(
                 AdoptingModifierStore pm,
                 PluralRules rules) {
             this.pm = pm;
             this.rules = rules;
             this.parent = null;
         }

         public ImmutablePatternModifier addToChain(MicroPropsGenerator parent) {
             this.parent = parent;
             return this;
         }

         @Override
         public MicroProps processQuantity(DecimalQuantity quantity) {
             MicroProps micros = parent.processQuantity(quantity);
             if (micros.modMiddle != null) {
                 return micros;
             }
             applyToMicros(micros, quantity);
             return micros;
         }

         public void applyToMicros(MicroProps micros, DecimalQuantity quantity) {
             if (rules == null) {
                 micros.modMiddle = pm.getModifierWithoutPlural(quantity.signum());
             } else {
                 StandardPlural pluralForm = RoundingUtils.getPluralSafe(micros.rounder, rules, quantity);
                 micros.modMiddle = pm.getModifier(quantity.signum(), pluralForm);
             }
         }

         // NOTE: This method is not used in ICU4J right now.
         // In ICU4C, it is used by getPrefixSuffix().
         // Un-comment this method when getPrefixSuffix() is cleaned up in ICU4J.
         // public Modifier getModifier(byte signum, StandardPlural plural) {
         // if (rules == null) {
         // return pm.getModifier(signum);
         // } else {
         // return pm.getModifier(signum, plural);
         // }
         // }
     }

     /** Used by the unsafe code path. */
     public MicroPropsGenerator addToChain(MicroPropsGenerator parent) {
         this.parent = parent;
         return this;
     }

     @Override
     public MicroProps processQuantity(DecimalQuantity fq) {
         MicroProps micros = parent.processQuantity(fq);
         if (micros.modMiddle != null) {
             return micros;
         }
         if (needsPlurals()) {
             StandardPlural pluralForm = RoundingUtils.getPluralSafe(micros.rounder, rules, fq);
             setNumberProperties(fq.signum(), pluralForm);
         } else {
             setNumberProperties(fq.signum(), null);
         }
         micros.modMiddle = this;
         return micros;
     }

     @Override
     public int apply(FormattedStringBuilder output, int leftIndex, int rightIndex) {
         int prefixLen = insertPrefix(output, leftIndex);
         int suffixLen = insertSuffix(output, rightIndex + prefixLen);
         // If the pattern had no decimal stem body (like #,##0.00), overwrite the value.
         int overwriteLen = 0;
         if (!patternInfo.hasBody()) {
             overwriteLen = output.splice(leftIndex + prefixLen, rightIndex + prefixLen, "", 0, 0, null);
         }
         CurrencySpacingEnabledModifier.applyCurrencySpacing(output,
                 leftIndex,
                 prefixLen,
                 rightIndex + prefixLen + overwriteLen,
                 suffixLen,
                 symbols);
         return prefixLen + overwriteLen + suffixLen;
     }

     @Override
     public int getPrefixLength() {
         // Render the affix to get the length
         prepareAffix(true);
         int result = AffixUtils.unescapedCount(currentAffix, true, this); // prefix length
         return result;
     }

     @Override
     public int getCodePointCount() {
         // Render the affixes to get the length
         prepareAffix(true);
         int result = AffixUtils.unescapedCount(currentAffix, false, this); // prefix length
         prepareAffix(false);
         result += AffixUtils.unescapedCount(currentAffix, false, this); // suffix length
         return result;
     }

     @Override
     public boolean isStrong() {
         return isStrong;
     }

     @Override
     public boolean containsField(java.text.Format.Field field) {
         // This method is not currently used. (unsafe path not used in range formatting)
         assert false;
         return false;
     }

     @Override
     public Parameters getParameters() {
         // This method is not currently used.
         assert false;
         return null;
     }

     @Override
     public boolean semanticallyEquivalent(Modifier other) {
         // This method is not currently used. (unsafe path not used in range formatting)
         assert false;
         return false;
     }

     private int insertPrefix(FormattedStringBuilder sb, int position) {
         prepareAffix(true);
         int length = AffixUtils.unescape(currentAffix, sb, position, this, field);
         return length;
     }

     private int insertSuffix(FormattedStringBuilder sb, int position) {
         prepareAffix(false);
         int length = AffixUtils.unescape(currentAffix, sb, position, this, field);
         return length;
     }

     /**
      * Pre-processes the prefix or suffix into the currentAffix field, creating and mutating that field
      * if necessary. Calls down to {@link PatternStringUtils#affixPatternProviderToStringBuilder}.
      *
      * @param isPrefix
      *            true to prepare the prefix; false to prepare the suffix.
      */
     private void prepareAffix(boolean isPrefix) {
         if (currentAffix == null) {
             currentAffix = new StringBuilder();
         }
         PatternStringUtils.patternInfoToStringBuilder(patternInfo,
                 isPrefix,
                 PatternStringUtils.resolveSignDisplay(signDisplay, signum),
                 plural,
                 perMilleReplacesPercent,
                 currentAffix);
     }

     /**
      * Returns the string that substitutes a given symbol type in a pattern.
      */
     @Override
     public CharSequence getSymbol(int type) {
         switch (type) {
         case AffixUtils.TYPE_MINUS_SIGN:
             return symbols.getMinusSignString();
         case AffixUtils.TYPE_PLUS_SIGN:
             return symbols.getPlusSignString();
         case AffixUtils.TYPE_PERCENT:
             return symbols.getPercentString();
         case AffixUtils.TYPE_PERMILLE:
             return symbols.getPerMillString();
         case AffixUtils.TYPE_CURRENCY_SINGLE:
             // UnitWidth ISO, HIDDEN, or NARROW overrides the singular currency symbol.
             if (unitWidth == UnitWidth.ISO_CODE) {
                 return currency.getCurrencyCode();
             } else if (unitWidth == UnitWidth.HIDDEN) {
                 return "";
             } else {
                 int selector = unitWidth == UnitWidth.NARROW ? Currency.NARROW_SYMBOL_NAME
                         : Currency.SYMBOL_NAME;
                 return currency.getName(symbols.getULocale(), selector, null);
             }
         case AffixUtils.TYPE_CURRENCY_DOUBLE:
             return currency.getCurrencyCode();
         case AffixUtils.TYPE_CURRENCY_TRIPLE:
             // NOTE: This is the code path only for patterns containing "¤¤¤".
             // Plural currencies set via the API are formatted in LongNameHandler.
             // This code path is used by DecimalFormat via CurrencyPluralInfo.
             assert plural != null;
             return currency
                     .getName(symbols.getULocale(), Currency.PLURAL_LONG_NAME, plural.getKeyword(), null);
         case AffixUtils.TYPE_CURRENCY_QUAD:
             return "\uFFFD";
         case AffixUtils.TYPE_CURRENCY_QUINT:
             return currency.getName(symbols.getULocale(), Currency.NARROW_SYMBOL_NAME, null);
         default:
             throw new AssertionError();
         }
     }
 }
	// © 2017 and later: Unicode, Inc. and others.
	// License & terms of use: http://www.unicode.org/copyright.html#License
	package com.ibm.icu.impl.number;

	import com.ibm.icu.impl.FormattedStringBuilder;
	import com.ibm.icu.impl.StandardPlural;
	import com.ibm.icu.impl.number.AffixUtils.SymbolProvider;
	import com.ibm.icu.number.NumberFormatter.SignDisplay;
	import com.ibm.icu.number.NumberFormatter.UnitWidth;
	import com.ibm.icu.text.DecimalFormatSymbols;
	import com.ibm.icu.text.NumberFormat.Field;
	import com.ibm.icu.text.PluralRules;
	import com.ibm.icu.util.Currency;

	/**
	* This class is a {@link Modifier} that wraps a decimal format pattern. It applies the pattern's affixes
	* in {@link Modifier#apply}.
	*
	* <p>
	* In addition to being a Modifier, this class contains the business logic for substituting the correct
	* locale symbols into the affixes of the decimal format pattern.
	*
	* <p>
	* In order to use this class, create a new instance and call the following four setters:
	* {@link #setPatternInfo}, {@link #setPatternAttributes}, {@link #setSymbols}, and
	* {@link #setNumberProperties}. After calling these four setters, the instance will be ready for use as
	* a Modifier.
	*
	* <p>
	* This is a MUTABLE, NON-THREAD-SAFE class designed for performance. Do NOT save references to this or
	* attempt to use it from multiple threads! Instead, you can obtain a safe, immutable decimal format
	* pattern modifier by calling {@link MutablePatternModifier#createImmutable}, in effect treating this
	* instance as a builder for the immutable variant.
	*/
	public class MutablePatternModifier implements Modifier, SymbolProvider, MicroPropsGenerator {

	// Modifier details
	final boolean isStrong;

	// Pattern details
	AffixPatternProvider patternInfo;
	Field field;
	SignDisplay signDisplay;
	boolean perMilleReplacesPercent;

	// Symbol details
	DecimalFormatSymbols symbols;
	UnitWidth unitWidth;
	Currency currency;
	PluralRules rules;

	// Number details
	Signum signum;
	StandardPlural plural;

	// QuantityChain details
	MicroPropsGenerator parent;

	// Transient fields for rendering
	StringBuilder currentAffix;

	/**
	* @param isStrong
	* Whether the modifier should be considered strong. For more information, see
	* {@link Modifier#isStrong()}. Most of the time, decimal format pattern modifiers should
	* be considered as non-strong.
	*/
	public MutablePatternModifier(boolean isStrong) {
	this.isStrong = isStrong;
	}

	/**
	* Sets a reference to the parsed decimal format pattern, usually obtained from
	* {@link PatternStringParser#parseToPatternInfo(String)}, but any implementation of
	* {@link AffixPatternProvider} is accepted.
	*
	* @param field
	* Which field to use for literal characters in the pattern.
	*/
	public void setPatternInfo(AffixPatternProvider patternInfo, Field field) {
	this.patternInfo = patternInfo;
	this.field = field;
	}

	/**
	* Sets attributes that imply changes to the literal interpretation of the pattern string affixes.
	*
	* @param signDisplay
	* Whether to force a plus sign on positive numbers.
	* @param perMille
	* Whether to substitute the percent sign in the pattern with a permille sign.
	*/
	public void setPatternAttributes(SignDisplay signDisplay, boolean perMille) {
	this.signDisplay = signDisplay;
	this.perMilleReplacesPercent = perMille;
	}

	/**
	* Sets locale-specific details that affect the symbols substituted into the pattern string affixes.
	*
	* @param symbols
	* The desired instance of DecimalFormatSymbols.
	* @param currency
	* The currency to be used when substituting currency values into the affixes.
	* @param unitWidth
	* The width used to render currencies.
	* @param rules
	* Required if the triple currency sign, "¤¤¤", appears in the pattern, which can be
	* determined from the convenience method {@link #needsPlurals()}.
	*/
	public void setSymbols(
	DecimalFormatSymbols symbols,
	Currency currency,
	UnitWidth unitWidth,
	PluralRules rules) {
	assert (rules != null) == needsPlurals();
	this.symbols = symbols;
	this.currency = currency;
	this.unitWidth = unitWidth;
	this.rules = rules;
	}

	/**
	* Sets attributes of the current number being processed.
	*
	* @param signum
	* -1 if negative; +1 if positive; or 0 if zero.
	* @param plural
	* The plural form of the number, required only if the pattern contains the triple
	* currency sign, "¤¤¤" (and as indicated by {@link #needsPlurals()}).
	*/
	public void setNumberProperties(Signum signum, StandardPlural plural) {
	assert (plural != null) == needsPlurals();
	this.signum = signum;
	this.plural = plural;
	}

	/**
	* Returns true if the pattern represented by this MurkyModifier requires a plural keyword in order
	* to localize. This is currently true only if there is a currency long name placeholder in the
	* pattern ("¤¤¤").
	*/
	public boolean needsPlurals() {
	return patternInfo.containsSymbolType(AffixUtils.TYPE_CURRENCY_TRIPLE);
	}

	/**
	* Creates a new quantity-dependent Modifier that behaves the same as the current instance, but which
	* is immutable and can be saved for future use. The number properties in the current instance are
	* mutated; all other properties are left untouched.
	*
	* <p>
	* The resulting modifier cannot be used in a QuantityChain.
	*
	* @return An immutable that supports both positive and negative numbers.
	*/
	public ImmutablePatternModifier createImmutable() {
	FormattedStringBuilder a = new FormattedStringBuilder();
	FormattedStringBuilder b = new FormattedStringBuilder();
	if (needsPlurals()) {
	// Slower path when we require the plural keyword.
	AdoptingModifierStore pm = new AdoptingModifierStore();
	for (StandardPlural plural : StandardPlural.VALUES) {
	setNumberProperties(Signum.POS, plural);
	pm.setModifier(Signum.POS, plural, createConstantModifier(a, b));
	setNumberProperties(Signum.POS_ZERO, plural);
	pm.setModifier(Signum.POS_ZERO, plural, createConstantModifier(a, b));
	setNumberProperties(Signum.NEG_ZERO, plural);
	pm.setModifier(Signum.NEG_ZERO, plural, createConstantModifier(a, b));
	setNumberProperties(Signum.NEG, plural);
	pm.setModifier(Signum.NEG, plural, createConstantModifier(a, b));
	}
	pm.freeze();
	return new ImmutablePatternModifier(pm, rules);
	} else {
	// Faster path when plural keyword is not needed.
	setNumberProperties(Signum.POS, null);
	Modifier positive = createConstantModifier(a, b);
	setNumberProperties(Signum.POS_ZERO, null);
	Modifier posZero = createConstantModifier(a, b);
	setNumberProperties(Signum.NEG_ZERO, null);
	Modifier negZero = createConstantModifier(a, b);
	setNumberProperties(Signum.NEG, null);
	Modifier negative = createConstantModifier(a, b);
	AdoptingModifierStore pm = new AdoptingModifierStore(positive, posZero, negZero, negative);
	return new ImmutablePatternModifier(pm, null);
	}
	}

	/**
	* Uses the current properties to create a single {@link ConstantMultiFieldModifier} with currency
	* spacing support if required.
	*
	* @param a
	* A working FormattedStringBuilder object; passed from the outside to prevent the need to
	* create many new instances if this method is called in a loop.
	* @param b
	* Another working FormattedStringBuilder object.
	* @return The constant modifier object.
	*/
	private ConstantMultiFieldModifier createConstantModifier(
	FormattedStringBuilder a,
	FormattedStringBuilder b) {
	insertPrefix(a.clear(), 0);
	insertSuffix(b.clear(), 0);
	if (patternInfo.hasCurrencySign()) {
	return new CurrencySpacingEnabledModifier(a, b, !patternInfo.hasBody(), isStrong, symbols);
	} else {
	return new ConstantMultiFieldModifier(a, b, !patternInfo.hasBody(), isStrong);
	}
	}

	public static class ImmutablePatternModifier implements MicroPropsGenerator {
	final AdoptingModifierStore pm;
	final PluralRules rules;
	/* final */ MicroPropsGenerator parent;

	ImmutablePatternModifier(
	AdoptingModifierStore pm,
	PluralRules rules) {
	this.pm = pm;
	this.rules = rules;
	this.parent = null;
	}

	public ImmutablePatternModifier addToChain(MicroPropsGenerator parent) {
	this.parent = parent;
	return this;
	}

	@Override
	public MicroProps processQuantity(DecimalQuantity quantity) {
	MicroProps micros = parent.processQuantity(quantity);
	if (micros.modMiddle != null) {
	return micros;
	}
	applyToMicros(micros, quantity);
	return micros;
	}

	public void applyToMicros(MicroProps micros, DecimalQuantity quantity) {
	if (rules == null) {
	micros.modMiddle = pm.getModifierWithoutPlural(quantity.signum());
	} else {
	StandardPlural pluralForm = RoundingUtils.getPluralSafe(micros.rounder, rules, quantity);
	micros.modMiddle = pm.getModifier(quantity.signum(), pluralForm);
	}
	}

	// NOTE: This method is not used in ICU4J right now.
	// In ICU4C, it is used by getPrefixSuffix().
	// Un-comment this method when getPrefixSuffix() is cleaned up in ICU4J.
	// public Modifier getModifier(byte signum, StandardPlural plural) {
	// if (rules == null) {
	// return pm.getModifier(signum);
	// } else {
	// return pm.getModifier(signum, plural);
	// }
	// }
	}

	/** Used by the unsafe code path. */
	public MicroPropsGenerator addToChain(MicroPropsGenerator parent) {
	this.parent = parent;
	return this;
	}

	@Override
	public MicroProps processQuantity(DecimalQuantity fq) {
	MicroProps micros = parent.processQuantity(fq);
	if (micros.modMiddle != null) {
	return micros;
	}
	if (needsPlurals()) {
	StandardPlural pluralForm = RoundingUtils.getPluralSafe(micros.rounder, rules, fq);
	setNumberProperties(fq.signum(), pluralForm);
	} else {
	setNumberProperties(fq.signum(), null);
	}
	micros.modMiddle = this;
	return micros;
	}

	@Override
	public int apply(FormattedStringBuilder output, int leftIndex, int rightIndex) {
	int prefixLen = insertPrefix(output, leftIndex);
	int suffixLen = insertSuffix(output, rightIndex + prefixLen);
	// If the pattern had no decimal stem body (like #,##0.00), overwrite the value.
	int overwriteLen = 0;
	if (!patternInfo.hasBody()) {
	overwriteLen = output.splice(leftIndex + prefixLen, rightIndex + prefixLen, "", 0, 0, null);
	}
	CurrencySpacingEnabledModifier.applyCurrencySpacing(output,
	leftIndex,
	prefixLen,
	rightIndex + prefixLen + overwriteLen,
	suffixLen,
	symbols);
	return prefixLen + overwriteLen + suffixLen;
	}

	@Override
	public int getPrefixLength() {
	// Render the affix to get the length
	prepareAffix(true);
	int result = AffixUtils.unescapedCount(currentAffix, true, this); // prefix length
	return result;
	}

	@Override
	public int getCodePointCount() {
	// Render the affixes to get the length
	prepareAffix(true);
	int result = AffixUtils.unescapedCount(currentAffix, false, this); // prefix length
	prepareAffix(false);
	result += AffixUtils.unescapedCount(currentAffix, false, this); // suffix length
	return result;
	}

	@Override
	public boolean isStrong() {
	return isStrong;
	}

	@Override
	public boolean containsField(java.text.Format.Field field) {
	// This method is not currently used. (unsafe path not used in range formatting)
	assert false;
	return false;
	}

	@Override
	public Parameters getParameters() {
	// This method is not currently used.
	assert false;
	return null;
	}

	@Override
	public boolean semanticallyEquivalent(Modifier other) {
	// This method is not currently used. (unsafe path not used in range formatting)
	assert false;
	return false;
	}

	private int insertPrefix(FormattedStringBuilder sb, int position) {
	prepareAffix(true);
	int length = AffixUtils.unescape(currentAffix, sb, position, this, field);
	return length;
	}

	private int insertSuffix(FormattedStringBuilder sb, int position) {
	prepareAffix(false);
	int length = AffixUtils.unescape(currentAffix, sb, position, this, field);
	return length;
	}

	/**
	* Pre-processes the prefix or suffix into the currentAffix field, creating and mutating that field
	* if necessary. Calls down to {@link PatternStringUtils#affixPatternProviderToStringBuilder}.
	*
	* @param isPrefix
	* true to prepare the prefix; false to prepare the suffix.
	*/
	private void prepareAffix(boolean isPrefix) {
	if (currentAffix == null) {
	currentAffix = new StringBuilder();
	}
	PatternStringUtils.patternInfoToStringBuilder(patternInfo,
	isPrefix,
	PatternStringUtils.resolveSignDisplay(signDisplay, signum),
	plural,
	perMilleReplacesPercent,
	currentAffix);
	}

	/**
	* Returns the string that substitutes a given symbol type in a pattern.
	*/
	@Override
	public CharSequence getSymbol(int type) {
	switch (type) {
	case AffixUtils.TYPE_MINUS_SIGN:
	return symbols.getMinusSignString();
	case AffixUtils.TYPE_PLUS_SIGN:
	return symbols.getPlusSignString();
	case AffixUtils.TYPE_PERCENT:
	return symbols.getPercentString();
	case AffixUtils.TYPE_PERMILLE:
	return symbols.getPerMillString();
	case AffixUtils.TYPE_CURRENCY_SINGLE:
	// UnitWidth ISO, HIDDEN, or NARROW overrides the singular currency symbol.
	if (unitWidth == UnitWidth.ISO_CODE) {
	return currency.getCurrencyCode();
	} else if (unitWidth == UnitWidth.HIDDEN) {
	return "";
	} else {
	int selector = unitWidth == UnitWidth.NARROW ? Currency.NARROW_SYMBOL_NAME
	: Currency.SYMBOL_NAME;
	return currency.getName(symbols.getULocale(), selector, null);
	}
	case AffixUtils.TYPE_CURRENCY_DOUBLE:
	return currency.getCurrencyCode();
	case AffixUtils.TYPE_CURRENCY_TRIPLE:
	// NOTE: This is the code path only for patterns containing "¤¤¤".
	// Plural currencies set via the API are formatted in LongNameHandler.
	// This code path is used by DecimalFormat via CurrencyPluralInfo.
	assert plural != null;
	return currency
	.getName(symbols.getULocale(), Currency.PLURAL_LONG_NAME, plural.getKeyword(), null);
	case AffixUtils.TYPE_CURRENCY_QUAD:
	return "\uFFFD";
	case AffixUtils.TYPE_CURRENCY_QUINT:
	return currency.getName(symbols.getULocale(), Currency.NARROW_SYMBOL_NAME, null);
	default:
	throw new AssertionError();
	}
	}
	}