Class CodepointsToString

    • Constructor Detail

      • CodepointsToString

        public CodepointsToString()
    • Method Detail

      • preEvaluate

        public Expression preEvaluate​(ExpressionVisitor visitor)
                               throws XPathException
        Pre-evaluate a function at compile time. Functions that do not allow pre-evaluation, or that need access to context information, can override this method.
        Overrides:
        preEvaluate in class FunctionCall
        Parameters:
        visitor - an expression visitor
        Returns:
        the result of the early evaluation, or the original expression, or potentially a simplified expression
        Throws:
        XPathException - if evaluation fails
      • evaluateItem

        public Item evaluateItem​(XPathContext c)
                          throws XPathException
        Evaluate
        Overrides:
        evaluateItem in class Expression
        Parameters:
        c - The context in which the expression is to be evaluated
        Returns:
        the node or atomic value that results from evaluating the expression; or null to indicate that the result is an empty sequence
        Throws:
        XPathException - if any dynamic error occurs evaluating the expression
      • unicodeToString

        public static java.lang.CharSequence unicodeToString​(SequenceIterator chars,
                                                             XPathContext context)
                                                      throws XPathException
        Return the Unicode string corresponding to a given sequence of Unicode code values
        Parameters:
        chars - iterator delivering the characters as integer values
        context - the evaluation context
        Throws:
        XPathException - if any of the integers is not the codepoint of a valid XML character