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java.lang.Object org.ucl.xpath.function.Function org.ucl.xpath.function.FnExactlyOne
Returns $arg if it contains exactly one item. Otherwise, raises an error [err:FORG0005]. The type of the result depends on the type of $arg.
Field Summary |
Fields inherited from class org.ucl.xpath.function.Function |
_arity, _fl, _name |
Constructor Summary | |
FnExactlyOne()
Constructor for FnExactlyOne. |
Method Summary | |
ResultSequence |
evaluate(java.util.Collection args)
Evaluate arguments. |
static ResultSequence |
exactly_one(java.util.Collection args)
Exactly-one 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 |
public FnExactlyOne()
Method Detail |
public ResultSequence evaluate(java.util.Collection args) throws DynamicError
evaluate
in class Function
args
- argument expressions.
DynamicError
- Dynamic error.public static ResultSequence exactly_one(java.util.Collection args) throws DynamicError
args
- Result from the expressions evaluation.
DynamicError
- Dynamic error.
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