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Java Standard Edition (SE)

Locale.FilteringMode


compact1, compact2, compact3
java.util

Enum Locale.FilteringMode

  • All Implemented Interfaces:
    Serializable, Comparable<Locale.FilteringMode>
    Enclosing class:
    Locale


    public static enum Locale.FilteringMode
    extends Enum<Locale.FilteringMode>
    This enum provides constants to select a filtering mode for locale matching. Refer to RFC 4647 Matching of Language Tags for details.

    As an example, think of two Language Priority Lists each of which includes only one language range and a set of following language tags:

        de (German)
        de-DE (German, Germany)
        de-Deva (German, in Devanagari script)
        de-Deva-DE (German, in Devanagari script, Germany)
        de-DE-1996 (German, Germany, orthography of 1996)
        de-Latn-DE (German, in Latin script, Germany)
        de-Latn-DE-1996 (German, in Latin script, Germany, orthography of 1996)
     
    The filtering method will behave as follows:
    Filtering Mode Language Priority List: "de-DE" Language Priority List: "de-*-DE"
    AUTOSELECT_FILTERING Performs basic filtering and returns "de-DE" and "de-DE-1996". Performs extended filtering and returns "de-DE", "de-Deva-DE", "de-DE-1996", "de-Latn-DE", and "de-Latn-DE-1996".
    EXTENDED_FILTERING Performs extended filtering and returns "de-DE", "de-Deva-DE", "de-DE-1996", "de-Latn-DE", and "de-Latn-DE-1996". Same as above.
    IGNORE_EXTENDED_RANGES Performs basic filtering and returns "de-DE" and "de-DE-1996". Performs basic filtering and returns null because nothing matches.
    MAP_EXTENDED_RANGES Same as above. Performs basic filtering and returns "de-DE" and "de-DE-1996" because "de-*-DE" is mapped to "de-DE".
    REJECT_EXTENDED_RANGES Same as above. Throws IllegalArgumentException because "de-*-DE" is not a valid basic language range.
    Since:
    1.8
    See Also:
    Locale.filter(List, Collection, FilteringMode), Locale.filterTags(List, Collection, FilteringMode)
    • Enum Constant Detail

      • AUTOSELECT_FILTERING

        public static final Locale.FilteringMode AUTOSELECT_FILTERING
        Specifies automatic filtering mode based on the given Language Priority List consisting of language ranges. If all of the ranges are basic, basic filtering is selected. Otherwise, extended filtering is selected.
      • EXTENDED_FILTERING

        public static final Locale.FilteringMode EXTENDED_FILTERING
        Specifies extended filtering.
      • IGNORE_EXTENDED_RANGES

        public static final Locale.FilteringMode IGNORE_EXTENDED_RANGES
        Specifies basic filtering: Note that any extended language ranges included in the given Language Priority List are ignored.
      • MAP_EXTENDED_RANGES

        public static final Locale.FilteringMode MAP_EXTENDED_RANGES
        Specifies basic filtering: If any extended language ranges are included in the given Language Priority List, they are mapped to the basic language range. Specifically, a language range starting with a subtag "*" is treated as a language range "*". For example, "*-US" is treated as "*". If "*" is not the first subtag, "*" and extra "-" are removed. For example, "ja-*-JP" is mapped to "ja-JP".
      • REJECT_EXTENDED_RANGES

        public static final Locale.FilteringMode REJECT_EXTENDED_RANGES
        Specifies basic filtering: If any extended language ranges are included in the given Language Priority List, the list is rejected and the filtering method throws IllegalArgumentException.
    • Method Detail

      • values

        public static Locale.FilteringMode[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
        for (Locale.FilteringMode c : Locale.FilteringMode.values())
            System.out.println(c);
        
        Returns:
        an array containing the constants of this enum type, in the order they are declared
      • valueOf

        public static Locale.FilteringMode valueOf(String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        IllegalArgumentException - if this enum type has no constant with the specified name
        NullPointerException - if the argument is null


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