org.ucl.xpath.function
Class FnExists

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

public class FnExists

extends Function

If the value of $arg is not the empty sequence, the function returns true; otherwise, the function returns false.

Field Summary

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

_arity, _fl, _name

Constructor Summary

FnExists()
Constructor for FnExists.

Method Summary

ResultSequence	evaluate(java.util.Collection args) Evaluate arguments.
static ResultSequence	exists(java.util.Collection args) Exists 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

FnExists

public FnExists()

Constructor for FnExists.

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.

exists

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

Exists operation.

Parameters:

args - Result from the expressions evaluation.

Returns:

Result of fn:exists operation.

Throws:

DynamicError - Dynamic error.