Package com.icl.saxon.expr

Class Step

java.lang.Object

com.icl.saxon.expr.Step

public final class Step
extends java.lang.Object

A step in a path expression

Constructor Summary

Constructors

Constructor	Description
Step(byte axis, NodeTest nodeTest)

Method Summary

Modifier and Type	Method	Description
Step	addFilter(Expression exp)
void	display(int level)	Diagnostic print of expression structure
NodeEnumeration	enumerate(NodeInfo node, Context context)	Enumerate this step.
byte	getAxis()
Expression[]	getFilters()
NodeTest	getNodeTest()
int	getNumberOfFilters()
void	setFilters(Expression[] filters, int count)
Step	simplify()	Simplify the step.

Methods inherited from class java.lang.Object

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

Constructor Detail

Step

public Step(byte axis,
            NodeTest nodeTest)

Method Detail

addFilter

public Step addFilter(Expression exp)

setFilters

public void setFilters(Expression[] filters,
                       int count)

getAxis

public byte getAxis()

getNodeTest

public NodeTest getNodeTest()

getFilters

public Expression[] getFilters()

getNumberOfFilters

public int getNumberOfFilters()

simplify

public Step simplify()
              throws XPathException

Simplify the step. Return either the same step after simplification, or null, indicating that the step will always give an empty result.

Throws:

XPathException

enumerate

public NodeEnumeration enumerate(NodeInfo node,
                                 Context context)
                          throws XPathException

Enumerate this step.

Parameters:

node - : The node from which we want to make the step

context - : The context for evaluation. Affects the result of positional filters

Throws:

XPathException

display

public void display(int level)

Diagnostic print of expression structure