Package com.apple.foundationdb.record.provider.common.text

Interface TextCollator

All Superinterfaces:

Comparator<String>

All Known Implementing Classes:

TextCollatorRegistryJRE.TextCollatorJRE

@API(EXPERIMENTAL)
public interface TextCollator
extends Comparator<String>

An interface for locale-sensitive text comparison and sorting. A text collator is specified with a locale name and a strength.

See Also:

TextCollatorRegistry

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	TextCollator.Strength	Standard strength values.

Method Summary

Modifier and Type	Method	Description
int	compare(String str1, String str2)	Compare the two strings according to the this collator's collation rules.
ByteString	getKey(String str)	Get a representation of a string suitable for storing in an index for this collation.

Methods inherited from interface java.util.Comparator

equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Method Detail

compare

int compare(@Nonnull
            String str1,
            @Nonnull
            String str2)

Compare the two strings according to the this collator's collation rules.

Specified by:

compare in interface Comparator<String>

Parameters:

str1 - the first string

str2 - the second string

Returns:

an integer equal to zero if the two strings are equivalent, less than zero if the first string should sort before the second, or greater than zero if the first string should sort after the second.

getKey

@Nonnull
ByteString getKey(@Nonnull
                  String str)

Get a representation of a string suitable for storing in an index for this collation. The unsigned byte comparison of the result byte array will match this collator's ordering.

Parameters:

str - the string to index

Returns:

a byte string for storing in an index