org.revenj.database.postgres.jinq.transform

Class RevenjQueryTransform

java.lang.Object

org.revenj.database.postgres.jinq.transform.RevenjQueryTransform

Direct Known Subclasses:

RevenjGroupingMultiLambdaQueryTransform, RevenjMultiLambdaQueryTransform, RevenjNoLambdaQueryTransform, RevenjOneLambdaQueryTransform

public abstract class RevenjQueryTransform
extends Object

Subclasses of this class are used to hold the logic for applying a lambda to a JPQL query (e.g. how to apply a where lambda to a JPQL query, producing a new JPQL query)

Method Summary

Modifier and Type	Method and Description
abstract String	getTransformationTypeCachingTag() Returns a String that can be used to identify the type of transformation being applied.
protected <U> ColumnExpressions<U>	makeSelectExpression(SymbExToColumns translator, LambdaAnalysis lambda)
protected Expression	pathConditionsToExpr(SymbExToColumns translator, ch.epfl.labos.iu.orm.queryll2.path.PathAnalysis path)
protected <U> ColumnExpressions<U>	simplifyAndTranslateMainPathToColumns(LambdaAnalysis lambda, SymbExToColumns translator, SymbExPassDown passdown)
protected <U> ColumnExpressions<U>	simplifyAndTranslatePathToColumns(LambdaAnalysis lambda, int pathIdx, SymbExToColumns translator, SymbExPassDown passdown)

Methods inherited from class java.lang.Object

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

Method Detail

makeSelectExpression

protected <U> ColumnExpressions<U> makeSelectExpression(SymbExToColumns translator,
                                                        LambdaAnalysis lambda)
                                                 throws ch.epfl.labos.iu.orm.queryll2.symbolic.TypedValueVisitorException

Throws:

ch.epfl.labos.iu.orm.queryll2.symbolic.TypedValueVisitorException

simplifyAndTranslateMainPathToColumns

protected <U> ColumnExpressions<U> simplifyAndTranslateMainPathToColumns(LambdaAnalysis lambda,
                                                                         SymbExToColumns translator,
                                                                         SymbExPassDown passdown)
                                                                  throws ch.epfl.labos.iu.orm.queryll2.symbolic.TypedValueVisitorException

Throws:

ch.epfl.labos.iu.orm.queryll2.symbolic.TypedValueVisitorException

simplifyAndTranslatePathToColumns

protected <U> ColumnExpressions<U> simplifyAndTranslatePathToColumns(LambdaAnalysis lambda,
                                                                     int pathIdx,
                                                                     SymbExToColumns translator,
                                                                     SymbExPassDown passdown)
                                                              throws ch.epfl.labos.iu.orm.queryll2.symbolic.TypedValueVisitorException

Throws:

ch.epfl.labos.iu.orm.queryll2.symbolic.TypedValueVisitorException

pathConditionsToExpr

protected Expression pathConditionsToExpr(SymbExToColumns translator,
                                          ch.epfl.labos.iu.orm.queryll2.path.PathAnalysis path)
                                   throws ch.epfl.labos.iu.orm.queryll2.symbolic.TypedValueVisitorException

Throws:

ch.epfl.labos.iu.orm.queryll2.symbolic.TypedValueVisitorException

getTransformationTypeCachingTag

public abstract String getTransformationTypeCachingTag()

Returns a String that can be used to identify the type of transformation being applied. This is useful for caching the effects of query transforms.