Package net.sf.saxon.trans.rules

Class RuleSearchState

java.lang.Object

net.sf.saxon.trans.rules.RuleSearchState

Direct Known Subclasses:

PreconditionMatcher

public class RuleSearchState
extends Object

A simple class for holding stateful details of a rule search operation This is a dummy implementation for Saxon-HE which does not optimize searching a rule chain. It is subclassed for Saxon-EE.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RuleSearchState()

Method Summary

Modifier and Type	Method	Description
boolean	checkPreconditions(Rule rule)	Use this search state to check whether the preconditions for a particular rule are satisfied
static RuleSearchState	getInstance()

Methods inherited from class java.lang.Object

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

Constructor Details

RuleSearchState

protected RuleSearchState()

Method Details

getInstance

public static RuleSearchState getInstance()

checkPreconditions

public boolean checkPreconditions(Rule rule)
                           throws XPathException

Use this search state to check whether the preconditions for a particular rule are satisfied

Parameters:

rule - the rule being tested

Returns:

true if all preconditions are satisfied; in the HE implementation, there are no preconditions, so this is always true.

Throws:

XPathException - (in a subclass) if evaluation of preconditions fails.