Package org.rumbledb.runtime.functions.strings

Class CollationResolver

java.lang.Object

org.rumbledb.runtime.functions.strings.CollationResolver

public final class CollationResolver
extends Object

Resolves a collation URI to a Comparator usable for string comparison, backed by ICU4J for the UCA-parametrized collation family.

Method Summary

Modifier and Type	Method	Description
static byte[]	collationKeyBytes(String value, String collationUri, ExceptionMetadata metadata)	Returns a byte encoding such that unsigned lexicographic order of the bytes matches the collation order (used by fn:collation-key).
static boolean	equals(String a, String b, String collationUri, ExceptionMetadata metadata)
static Comparator<String>	resolve(String collationUri, ExceptionMetadata metadata)

Methods inherited from class java.lang.Object

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

Method Details

resolve

public static Comparator<String> resolve(String collationUri,
 ExceptionMetadata metadata)

equals

public static boolean equals(String a,
 String b,
 String collationUri,
 ExceptionMetadata metadata)

collationKeyBytes

public static byte[] collationKeyBytes(String value,
 String collationUri,
 ExceptionMetadata metadata)

Returns a byte encoding such that unsigned lexicographic order of the bytes matches the collation order (used by fn:collation-key). For the codepoint collation, this is simply the UTF-8 encoding, per its definition in terms of Unicode code points.