org.apache.xpath.operations
Class Variable

java.lang.Object
  |
  +--org.apache.xpath.Expression
        |
        +--org.apache.xpath.operations.Variable

public class Variable

extends Expression

The variable reference expression executer.

See Also:

Serialized Form

Constructor Summary

Variable()

Method Summary

XObject	execute(XPathContext xctxt) Dereference the variable, and return the reference value.
void	setQName(QName qname) Set the qualified name of the variable.

Methods inherited from class org.apache.xpath.Expression

assert, canTraverseOutsideSubtree, error, setSourceLocator, warn

Methods inherited from class java.lang.Object

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

Constructor Detail

Variable

public Variable()

Method Detail

setQName

public void setQName(QName qname)

Set the qualified name of the variable.

Parameters:

qname - Must be a non-null reference to a qualified name.

execute

public XObject execute(XPathContext xctxt)
                throws TransformerException

Dereference the variable, and return the reference value. Note that lazy evaluation will occur. If a variable within scope is not found, a warning will be sent to the error listener, and an empty nodeset will be returned.

Parameters:

xctxt - The runtime execution context.

Returns:

The evaluated variable, or an empty nodeset if not found.

Throws:

TransformerException -

Overrides:

execute in class Expression