org.jaxen.function
public class StringLengthFunction extends Object implements Function
4.2 number string-length(string)
The string-length function returns the number of Unicode characters
in its argument. This is not necessarily
the same as the number Java chars
in the corresponding Java string. In particular, if the Java String
contains surrogate pairs each such pair will be counted as only one character
by this function. If the argument is omitted,
it returns the length of the string-value of the context node.
See Also: Section
4.2 of the XPath Specification
Constructor Summary | |
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StringLengthFunction()
Create a new StringLengthFunction object. |
Method Summary | |
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Object | call(Context context, List args) Returns the number of Unicode characters in the string-value of the argument. |
static Double | evaluate(Object obj, Navigator nav) Returns the number of Unicode characters in the string-value of an object. |
StringLengthFunction
object.Returns the number of Unicode characters in the string-value of the argument.
Parameters: context the context at the point in the expression when the function is called args a list containing the item whose string-value is to be counted. If empty, the length of the context node's string-value is returned.
Returns: a Double
giving the number of Unicode characters
Throws: FunctionCallException if args has more than one item
Returns the number of Unicode characters in the string-value of an object.
Parameters: obj the object whose string-value is counted nav used to calculate the string-values of the first two arguments
Returns: a Double
giving the number of Unicode characters
Throws: FunctionCallException if the string contains mismatched surrogates