Pattern matching is the process of searching text for occurrences of a specified pattern. The Internationalization Module offers several classes that assist in finding patterns in Unicode strings:
RWUString provides methods contains(), index(), rindex(), and subString() that search text for occurrences of a specified substring, based on simple lexical comparisons of the code units in the strings.
RWUStringSearch performs flexible, collator-based string searches, employing the rules encapsulated by an RWUCollator and an optional RWUBreakSearch to determine if and where a match occurs.
RWURegularExpression searches text for occurrences of a specified regular expression pattern.
RWURegexResult stores regular expression match results.
RWURegexMatchIterator provides a convenient interface for finding all successive matches of a particular regular expression pattern in a string.
This chapter describes the various techniques for searching Unicode text supported by the Internationalization Module:
lexical string searching
locale-sensitive string searching
regular expression string searching
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