Class NavigationNullCompilationOptimiser

java.lang.Object

org.datanucleus.store.query.compiler.NavigationNullCompilationOptimiser

All Implemented Interfaces:

CompilationOptimiser

public class NavigationNullCompilationOptimiser
extends Object
implements CompilationOptimiser

Optimiser for query compilation that searches for navigation through relations, and adds "not null" checks. Applies to the FILTER only.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) ClassLoaderResolver	clr
(package private) QueryCompilation	compilation	The compilation that we are optimising.
(package private) MetaDataManager	mmgr

Constructor Summary

Constructors

Constructor	Description
NavigationNullCompilationOptimiser(QueryCompilation compilation, MetaDataManager mmgr, ClassLoaderResolver clr)

Method Summary

Modifier and Type	Method	Description
protected boolean	isPrimaryExpressionRelationNavigation(PrimaryExpression primExpr)
void	optimise()	Method to perform the optimisation.
private void	processPrimaryExpressionNavigationNullCheck(Expression expr)

Methods inherited from class Object

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

Field Details

compilation

QueryCompilation compilation

The compilation that we are optimising.

mmgr

MetaDataManager mmgr

clr

ClassLoaderResolver clr

Constructor Details

NavigationNullCompilationOptimiser

public NavigationNullCompilationOptimiser(QueryCompilation compilation,
 MetaDataManager mmgr,
 ClassLoaderResolver clr)

Method Details

optimise

public void optimise()

Description copied from interface: CompilationOptimiser

Method to perform the optimisation.

Specified by:

optimise in interface CompilationOptimiser

processPrimaryExpressionNavigationNullCheck

private void processPrimaryExpressionNavigationNullCheck(Expression expr)

isPrimaryExpressionRelationNavigation

protected boolean isPrimaryExpressionRelationNavigation(PrimaryExpression primExpr)