org.ucl.xpath.function
Class FnTrace

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

public class FnTrace

extends Function

The input $value is returned, unchanged, as the result of the function. In addition, the inputs $value, converted to an xs:string, and $label may be directed to a trace data set. The location and format of the trace data set are implementation dependent. The ordering of output from invocations of the fn:trace() function is implementation dependent.

Field Summary

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

_arity, _fl, _name

Constructor Summary

FnTrace()
Constructor for FnTrace.

Method Summary

ResultSequence	evaluate(java.util.Collection args) Evaluate arguments.
static ResultSequence	trace(java.util.Collection args) Trace 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

FnTrace

public FnTrace()

Constructor for FnTrace.

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.

trace

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

Trace operation.

Parameters:

args - Result from the expressions evaluation.

Returns:

Result of fn:trace operation.

Throws:

DynamicError - Dynamic error.