net.sf.saxon.instruct

Class GlobalVariable

public class GlobalVariable extends GeneralVariable implements Container

A compiled global variable in a stylesheet or query.

Constructor Summary
	GlobalVariable()

Method Summary
ValueRepresentation	evaluateVariable(XPathContext context) Evaluate the variable
Executable	getExecutable()
int	getHostLanguage()
InstructionInfo	getInstructionInfo() Get InstructionInfo for this expression
ValueRepresentation	getSelectValue(XPathContext context) Evaluate the variable.
boolean	isGlobal()
void	lookForCycles(Stack referees) Check for cycles in this variable definition
TailCall	processLeavingTail(XPathContext context) Process the variable declaration
void	setContainsLocals(SlotManager map)
void	setExecutable(Executable executable)
void	setHostLanguage(int language)

Method Detail

evaluateVariable

public ValueRepresentation evaluateVariable(XPathContext context)

Evaluate the variable

getInstructionInfo

public InstructionInfo getInstructionInfo()

Get InstructionInfo for this expression

getSelectValue

public ValueRepresentation getSelectValue(XPathContext context)

Evaluate the variable. That is, get the value of the select expression if present or the content of the element otherwise, either as a tree or as a sequence

lookForCycles

public void lookForCycles(Stack referees)

Check for cycles in this variable definition

Parameters: referees the calls leading up to this one; it's an error if this variable is on the stack, because that means it calls itself directly or indirectly. The stack may contain variable definitions (GlobalVariable objects) and user-defined functions (UserFunction objects). It will never contain the same object more than once.

processLeavingTail

public TailCall processLeavingTail(XPathContext context)

Process the variable declaration

setContainsLocals

public void setContainsLocals(SlotManager map)

setExecutable

public void setExecutable(Executable executable)

setHostLanguage

public void setHostLanguage(int language)