com.saxonica.ee.optim

Class CombinedChoice

java.lang.Object

com.saxonica.ee.optim.CombinedChoice

public class CombinedChoice
extends Object

A class that encompasses a set of template choices

The choice tests themselves are cast in a WhichOf expression, which returns the number of the first case that yields true. This is then used to index into the appropriate rule for action.

Under next-match operation we have recorded a hash value for each of the rules associated with this choice set. A simple lookup finds the index of the last rule executed, which is used as the starting point for the WhichOf test.

Constructor Summary

Constructors

Constructor and Description
CombinedChoice(ModeExperimentalChoice mode, Rule chain, int type)
CombinedChoice(ModeExperimentalChoice mode, Rule chain, Rule unnamed, int type)
CombinedChoice(ModeExperimentalChoice mode, Rule chain, Rule unnamed, int type, int fingerprint)
CombinedChoice(ModeExperimentalChoice mode, Rule chain, Rule unnamed, Rule generic, int type, int fingerprint)

Method Summary

Methods

Modifier and Type	Method and Description
void	explain(ExpressionPresenter out)
void	findPreconditions(PatternOptimizationEE patternOptimization)
Rule	getChoice(Item item, int min, int max, XPathContext context)
Rule	getChoice(Item item, Rule currentRule, XPathContext context)
Rule	getChoice(Item item, XPathContext context)
int	getType()
XPathContextMajor	makeEvalContext(Item item, XPathContext context)
int	size()

Methods inherited from class java.lang.Object

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

Constructor Detail

CombinedChoice

public CombinedChoice(ModeExperimentalChoice mode,
              Rule chain,
              int type)

CombinedChoice

public CombinedChoice(ModeExperimentalChoice mode,
              Rule chain,
              Rule unnamed,
              int type)

CombinedChoice

public CombinedChoice(ModeExperimentalChoice mode,
              Rule chain,
              Rule unnamed,
              int type,
              int fingerprint)

CombinedChoice

public CombinedChoice(ModeExperimentalChoice mode,
              Rule chain,
              Rule unnamed,
              Rule generic,
              int type,
              int fingerprint)

Method Detail

getType

public int getType()

size

public int size()

makeEvalContext

public XPathContextMajor makeEvalContext(Item item,
                                XPathContext context)
                                  throws XPathException

Throws:

XPathException

getChoice

public Rule getChoice(Item item,
             XPathContext context)
               throws XPathException

Throws:

XPathException

getChoice

public Rule getChoice(Item item,
             Rule currentRule,
             XPathContext context)
               throws XPathException

Throws:

XPathException

getChoice

public Rule getChoice(Item item,
             int min,
             int max,
             XPathContext context)
               throws XPathException

Throws:

XPathException

findPreconditions

public void findPreconditions(PatternOptimizationEE patternOptimization)

explain

public void explain(ExpressionPresenter out)