org.apache.xalan.templates
Class VarNameCollector

java.lang.Object
  org.apache.xpath.XPathVisitor
      org.apache.xalan.templates.VarNameCollector

public class VarNameCollector

extends XPathVisitor

This class visits variable refs in an XPath and collects their QNames.

Field Summary

(package private) Vector

m_refs

Constructor Summary

VarNameCollector()

Method Summary

(package private) boolean	doesOccur(QName refName) Tell if the given qualified name occurs in the list of qualified names collected.
int	getVarCount() Get the number of variable references that were collected.
void	reset() Reset the list for a fresh visitation and collection.
boolean	visitVariableRef(ExpressionOwner owner, Variable var) Visit a variable reference.

Methods inherited from class org.apache.xpath.XPathVisitor

visitBinaryOperation, visitFunction, visitLocationPath, visitMatchPattern, visitNumberLiteral, visitPredicate, visitStep, visitStringLiteral, visitUnaryOperation, visitUnionPath, visitUnionPattern

Methods inherited from class java.lang.Object

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

Field Detail

m_refs

Vector m_refs

Constructor Detail

VarNameCollector

public VarNameCollector()

Method Detail

reset

public void reset()

Reset the list for a fresh visitation and collection.

getVarCount

public int getVarCount()

Get the number of variable references that were collected.

Returns:

the size of the list.

doesOccur

boolean doesOccur(QName refName)

Tell if the given qualified name occurs in the list of qualified names collected.

Parameters:

refName - Must be a valid qualified name.

Returns:

true if the list contains the qualified name.

visitVariableRef

public boolean visitVariableRef(ExpressionOwner owner,
                                Variable var)

Visit a variable reference.

Overrides:

visitVariableRef in class XPathVisitor

Parameters:

owner - The owner of the expression, to which the expression can be reset if rewriting takes place.

var - The variable reference object.

Returns:

true if the sub expressions should be traversed.