org.jaxen.function
public class SumFunction extends Object implements Function
4.4 number sum(node-set)
The sum function returns the sum, for each node in the argument node-set, of the result of converting the string-values of the node to a number.
See Also: Section 4.4 of the XPath Specification
Constructor Summary | |
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SumFunction()
Create a new SumFunction object. |
Method Summary | |
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Object | call(Context context, List args) Returns the sum of its arguments.
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static Double | evaluate(Object obj, Navigator nav)
Returns the sum of the items in a list.
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SumFunction
object.Parameters: context the context at the point in the
expression when the function is called args a list that contains exactly one item, also a List
Returns: a Double
containing the sum of the items in args.get(0)
Throws: FunctionCallException if args
has more or less than one item;
or if the first argument is not a List
Double
as if by the XPath number()
function.
Parameters: obj a List
of numbers to be summed nav ignored
Returns: the sum of the list
Throws: FunctionCallException if obj
is not a List