net.sf.joost.stx
Class FunctionTable.Count

java.lang.Object
  net.sf.joost.stx.FunctionTable.Count

All Implemented Interfaces:

FunctionTable.Instance

Enclosing class:

FunctionTable

public static final class FunctionTable.Count

extends Object

implements FunctionTable.Instance

The count function. Returns the number of items in the sequence.

See Also:

fn:count in "XQuery 1.0 and XPath 2.0 Functions and Operators"

Constructor Summary

FunctionTable.Count()

Method Summary

Value	evaluate(Context context, int top, Tree args) The evaluation method.
int	getMaxParCount() Maximum number of parameters.
int	getMinParCount() Minimum number of parameters.
String	getName() Expanded name of the function.

Methods inherited from class java.lang.Object

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

Constructor Detail

FunctionTable.Count

public FunctionTable.Count()

Method Detail

getMinParCount

public int getMinParCount()

Description copied from interface: FunctionTable.Instance

Minimum number of parameters.

Specified by:

getMinParCount in interface FunctionTable.Instance

Returns:

1

getMaxParCount

public int getMaxParCount()

Description copied from interface: FunctionTable.Instance

Maximum number of parameters.

Specified by:

getMaxParCount in interface FunctionTable.Instance

Returns:

1

getName

public String getName()

Description copied from interface: FunctionTable.Instance

Expanded name of the function.

Specified by:

getName in interface FunctionTable.Instance

Returns:

"count"

evaluate

public Value evaluate(Context context,
                      int top,
                      Tree args)
               throws SAXException,
                      EvalException

Description copied from interface: FunctionTable.Instance

The evaluation method.

Specified by:

evaluate in interface FunctionTable.Instance

Parameters:

context - the Context object

top - the number of the upper most element on the stack

args - the current parameters

Returns:

a Value instance containing the result

Throws:

EvalException - if an error occurs while processing

SAXException - if an error occurs while processing