org.ucl.xpath.function
Class FnSum

java.lang.Object
  org.ucl.xpath.function.Function
      org.ucl.xpath.function.FnSum

public class FnSum

extends Function

Returns a value obtained by adding together the values in $arg. If the single-argument form of the function is used, then the value returned for an empty sequence is the xs:integer value 0. If the two-argument form is used, then the value returned for an empty sequence is the value of the $zero argument.

Field Summary

Fields inherited from class org.ucl.xpath.function.Function

_arity, _fl, _name

Constructor Summary

FnSum()
Constructor for FnSum.

Method Summary

ResultSequence	evaluate(java.util.Collection args) Evaluate arguments.
static ResultSequence	sum(java.util.Collection args) Sum operation.

Methods inherited from class org.ucl.xpath.function.Function

arity, convert_argument, convert_arguments, dynamic_context, name, set_function_library, signature, signature, signature, static_context

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FnSum

public FnSum()

Constructor for FnSum.

Method Detail

evaluate

public ResultSequence evaluate(java.util.Collection args)
                        throws DynamicError

Evaluate arguments.

Specified by:

evaluate in class Function

Parameters:

args - argument expressions.

Returns:

Result of evaluation.

Throws:

DynamicError - Dynamic error.

sum

public static ResultSequence sum(java.util.Collection args)
                          throws DynamicError

Sum operation.

Parameters:

args - Result from the expressions evaluation.

Returns:

Result of fn:sum operation.

Throws:

DynamicError - Dynamic error.