Package com.ibm.icu.number

Class NumberSkeletonImpl

java.lang.Object

com.ibm.icu.number.NumberSkeletonImpl

class NumberSkeletonImpl
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static final class	NumberSkeletonImpl.BlueprintHelpers	Utility class for methods for processing stems and options that cannot be interpreted literally.
(package private) static final class	NumberSkeletonImpl.EnumToStemString	Utility class for methods that convert from enums to stem strings.
(package private) static final class	NumberSkeletonImpl.GeneratorHelpers	Utility class for methods for generating a token corresponding to each macro-prop.
(package private) static enum	NumberSkeletonImpl.ParseState	While parsing a skeleton, this enum records what type of option we expect to find next.
(package private) static enum	NumberSkeletonImpl.StemEnum	All possible stem literals have an entry in the StemEnum.
(package private) static final class	NumberSkeletonImpl.StemToObject	Utility class for methods that convert from StemEnum to corresponding objects or enums.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final char	ALT_WILDCARD_CHAR	Alternative wildcard char, accept on input but not printed in output
private static final CacheBase<String,UnlocalizedNumberFormatter,Void>	cache	Cache for parsed skeleton strings.
(package private) static final String	SERIALIZED_STEM_TRIE	A data structure for mapping from stem strings to the stem enum.
(package private) static final NumberSkeletonImpl.StemEnum[]	STEM_ENUM_VALUES	For mapping from ordinal back to StemEnum in Java.
(package private) static final char	WILDCARD_CHAR	Default wildcard char, accepted on input and printed in output

Constructor Summary

Constructors

Constructor	Description
NumberSkeletonImpl()

Method Summary

Modifier and Type	Method	Description
private static void	appendMultiple(StringBuilder sb, int cp, int count)
(package private) static String	buildStemTrie()
private static void	checkNull(Object value, CharSequence content)
static UnlocalizedNumberFormatter	create(String skeletonString)	Creates a NumberFormatter corresponding to the given skeleton string.
static String	generate(MacroProps macros)	Create a skeleton string corresponding to the given NumberFormatter.
private static void	generateSkeleton(MacroProps macros, StringBuilder sb)	Main skeleton generator function.
static UnlocalizedNumberFormatter	getOrCreate(String skeletonString)	Gets the number formatter for the given number skeleton string from the cache, creating it if it does not exist in the cache.
(package private) static boolean	isWildcardChar(char c)	Checks whether the char is a wildcard on input
private static NumberSkeletonImpl.ParseState	parseOption(NumberSkeletonImpl.ParseState stem, StringSegment segment, MacroProps macros)	Given that the current segment represents an option, parse it and save the result.
private static MacroProps	parseSkeleton(String skeletonString)	Converts from a skeleton string to a MacroProps.
private static NumberSkeletonImpl.ParseState	parseStem(StringSegment segment, CharsTrie stemTrie, MacroProps macros)	Given that the current segment represents a stem, parse it and save the result.

Methods inherited from class java.lang.Object

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

Field Details

WILDCARD_CHAR

static final char WILDCARD_CHAR

Default wildcard char, accepted on input and printed in output

See Also:

• Constant Field Values

ALT_WILDCARD_CHAR

static final char ALT_WILDCARD_CHAR

Alternative wildcard char, accept on input but not printed in output

See Also:

• Constant Field Values

STEM_ENUM_VALUES

static final NumberSkeletonImpl.StemEnum[] STEM_ENUM_VALUES

For mapping from ordinal back to StemEnum in Java.

SERIALIZED_STEM_TRIE

static final String SERIALIZED_STEM_TRIE

A data structure for mapping from stem strings to the stem enum. Built at startup.

cache

private static final CacheBase<String,UnlocalizedNumberFormatter,Void> cache

Cache for parsed skeleton strings.

Constructor Details

NumberSkeletonImpl

NumberSkeletonImpl()

Method Details

isWildcardChar

static boolean isWildcardChar(char c)

Checks whether the char is a wildcard on input

buildStemTrie

static String buildStemTrie()

getOrCreate

public static UnlocalizedNumberFormatter getOrCreate(String skeletonString)

Gets the number formatter for the given number skeleton string from the cache, creating it if it does not exist in the cache.

Parameters:

skeletonString - A number skeleton string, possibly not in its shortest form.

Returns:

An UnlocalizedNumberFormatter with behavior defined by the given skeleton string.

create

public static UnlocalizedNumberFormatter create(String skeletonString)

Creates a NumberFormatter corresponding to the given skeleton string.

Parameters:

skeletonString - A number skeleton string, possibly not in its shortest form.

Returns:

An UnlocalizedNumberFormatter with behavior defined by the given skeleton string.

generate

public static String generate(MacroProps macros)

Create a skeleton string corresponding to the given NumberFormatter.

Parameters:

macros - The NumberFormatter options object.

Returns:

A skeleton string in normalized form.

parseSkeleton

private static MacroProps parseSkeleton(String skeletonString)

Converts from a skeleton string to a MacroProps. This method contains the primary parse loop.

parseStem

private static NumberSkeletonImpl.ParseState parseStem(StringSegment segment,
 CharsTrie stemTrie,
 MacroProps macros)

Given that the current segment represents a stem, parse it and save the result.

Returns:

The next state after parsing this stem, corresponding to what subset of options to expect.

parseOption

private static NumberSkeletonImpl.ParseState parseOption(NumberSkeletonImpl.ParseState stem,
 StringSegment segment,
 MacroProps macros)

Given that the current segment represents an option, parse it and save the result.

Returns:

The next state after parsing this option, corresponding to what subset of options to expect next.

generateSkeleton

private static void generateSkeleton(MacroProps macros,
 StringBuilder sb)

Main skeleton generator function. Appends the normalized skeleton for the MacroProps to the given StringBuilder.

checkNull

private static void checkNull(Object value,
 CharSequence content)

appendMultiple

private static void appendMultiple(StringBuilder sb,
 int cp,
 int count)