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.

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

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

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.

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.

Overrides:

visitFunction in class XPathVisitor

visitVariableRef

public boolean visitVariableRef(ExpressionOwner owner,
                                Variable var)

Visit a variable reference.

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.

Overrides:

visitVariableRef in class XPathVisitor