net.sf.saxon.functions
public class Replace extends SystemFunction
Method Summary | |
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static String | checkReplacement(CharSequence rep)
Check the contents of the replacement string |
Item | evaluateItem(XPathContext c)
Evaluate the function in a string context |
RegularExpression | getCompiledRegularExpression()
Get the compiled regular expression if available, otherwise return null |
Expression | optimize(ExpressionVisitor visitor, ItemType contextItemType)
Perform optimisation of an expression and its subexpressions.
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Expression | simplify(ExpressionVisitor visitor)
Simplify and validate.
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Parameters: rep the replacement string
Returns: null if the string is OK, or an error message if not
Returns: the compiled regex, or null
This method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.
Parameters: visitor an expression visitor contextItemType the static type of "." at the point where this expression is invoked. The parameter is set to null if it is known statically that the context item will be undefined. If the type of the context item is not known statically, the argument is set to ITEM_TYPE
Returns: the original expression, rewritten if appropriate to optimize execution
Throws: net.sf.saxon.trans.XPathException if an error is discovered during this phase (typically a type error)
Parameters: visitor an expression visitor