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: Class Step

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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

Step(byte axis, NodeTest nodeTest)


Method Summary

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.

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

display


public void display(int level)

Diagnostic print of expression structure