org.apache.xalan.templates
Class AbsPathChecker

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

public class AbsPathChecker
extends XPathVisitor

This class runs over a path expression that is assumed to be absolute, and checks for variables and the like that may make it context dependent.

Field Summary

private boolean

m_isAbs

Constructor Summary

AbsPathChecker()

Method Summary

boolean	checkAbsolute(LocPathIterator path) Process the LocPathIterator to see if it contains variables or functions that may make it context dependent.
boolean	visitFunction(ExpressionOwner owner, Function func) Visit a function.
boolean	visitVariableRef(ExpressionOwner owner, Variable var) Visit a variable reference.

Methods inherited from class org.apache.xpath.XPathVisitor

visitBinaryOperation, 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_isAbs

private boolean m_isAbs

Constructor Detail

AbsPathChecker

public AbsPathChecker()

Method Detail

checkAbsolute

public boolean checkAbsolute(LocPathIterator path)

Process the LocPathIterator to see if it contains variables or functions that may make it context dependent.

Parameters:

path - LocPathIterator that is assumed to be absolute, but needs checking.

Returns:

true if the path is confirmed to be absolute, false if it may contain context dependencies.

visitFunction

public boolean visitFunction(ExpressionOwner owner,
                             Function func)

Visit a function.

Overrides:

visitFunction in class XPathVisitor

Parameters:

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

func - The function reference object.

Returns:

true if the sub expressions should be traversed.

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.