Package net.sf.saxon.regex

Class JDK15RegexTranslator

  • public class JDK15RegexTranslator
extends java.lang.Object
    This class translates XML Schema regex syntax into JDK 1.5 regex syntax. This differs from the JDK 1.4 translator because JDK 1.5 handles non-BMP characters (wide characters) in places where JDK 1.4 does not, for example in a range such as [X-Y]. This enables much of the code from the 1.4 translator to be removed. Author: James Clark Modified by Michael Kay (a) to integrate the code into Saxon, and (b) to support XPath additions to the XML Schema regex syntax. This version also removes most of the complexities of handling non-BMP characters, since JDK 1.5 handles these natively.

    • Method Detail

      • translate

        public static java.lang.String translate​(java.lang.CharSequence regexp,
                                         boolean xpath,
                                         boolean ignoreWhitespace,
                                         boolean caseBlind)
                                  throws RegexSyntaxException
        Translates a regular expression in the syntax of XML Schemas Part 2 into a regular expression in the syntax of java.util.regex.Pattern. The translation assumes that the string to be matched against the regex uses surrogate pairs correctly. If the string comes from XML content, a conforming XML parser will automatically check this; if the string comes from elsewhere, it may be necessary to check surrogate usage before matching.
        Parameters:
        regexp - a String containing a regular expression in the syntax of XML Schemas Part 2
        xpath - a boolean indicating whether the XPath 2.0 F+O extensions to the schema regex syntax are permitted
        Throws:
        RegexSyntaxException - if regexp is not a regular expression in the syntax of XML Schemas Part 2, or XPath 2.0, as appropriate
        See Also:
        Pattern, XML Schema Part 2