net.sf.saxon.functions

Class Existence

public class Existence extends SystemFunction

Implement the exists() and empty() functions *

Field Summary
static int	EMPTY
static int	EXISTS

Method Summary
void	checkArguments(StaticContext env) Static analysis: prevent sorting of the argument
boolean	effectiveBooleanValue(XPathContext c) Evaluate the function in a boolean context
Item	evaluateItem(XPathContext c) Evaluate in a general context

Field Detail

public static final int EMPTY

public static final int EXISTS

public void checkArguments(StaticContext env)

Static analysis: prevent sorting of the argument

public boolean effectiveBooleanValue(XPathContext c)

Evaluate the function in a boolean context

public Item evaluateItem(XPathContext c)

Evaluate in a general context