Package it.bancaditalia.oss.vtl.model.transform

Interface Transformation

All Superinterfaces:

Serializable

All Known Subinterfaces:

LeafTransformation

All Known Implementing Classes:

AggrClauseTransformation, AggrClauseTransformation.AggrClauseItem, AggregateTransformation, ArithmeticTransformation, BetweenTransformation, BinaryTransformation, BooleanTransformation, BooleanUnaryTransformation, BracketTransformation, CalcClauseTransformation, CalcClauseTransformation.CalcClauseItem, CallTransformation, CastTransformation, CheckHierarchyTransformation, CheckTransformation, ComparisonTransformation, ConcatTransformation, ConditionalTransformation, ConstantOperand, CurrentDateOperand, DatasetClauseTransformation, DatasetUnaryTransformation, DropClauseTransformation, ExistsInTransformation, FillTimeSeriesTransformation, FilterClauseTransformation, InclusionTransformation, InStrTransformation, IsNullTransformation, JoinTransformation, KeepClauseTransformation, MatchTransformation, NotTransformation, NumericUnaryTransformation, NvlTransformation, OffsetTransformation, ParenthesesTransformation, PeriodIndicatorTransformation, PivotClauseTransformation, RankTransformation, RatioToReportTransformation, RenameClauseTransformation, ReplaceTransformation, SetTransformation, SimpleAnalyticTransformation, StringUnaryTransformation, StrlenTransformation, SubspaceClauseTransformation, SubstrTransformation, TimeAggTransformation, TimeSeriesTransformation, TimeShiftTransformation, TransformationImpl, UnaryTransformation, UnpivotClauseTransformation, VarIDOperand

public interface Transformation
extends Serializable

The representation of a VTL transformation.

Author:

Valentino Pinna

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
VTLValue	eval(TransformationScheme scheme)	Evaluates this transformation in the context of the given TransformationScheme.
Lineage	getLineage()	Get the lineage history of this transformation inside a given TransformationScheme.
VTLValueMetadata	getMetadata(TransformationScheme scheme)	Checks and returns the metadata of this Transformation within the given TransformationScheme.
Set<LeafTransformation>	getTerminals()	A set of all the LeafTransformations recursively referenced by this Transformation.
int	hashCode()
boolean	isTerminal()

Method Detail

isTerminal

boolean isTerminal()

Returns:

True if this Transformation do not require previous computations before returning a result.

getTerminals

Set<LeafTransformation> getTerminals()

A set of all the LeafTransformations recursively referenced by this Transformation. The set is empty if isTerminal() is true.

Returns:

the set

eval

VTLValue eval(TransformationScheme scheme)

Evaluates this transformation in the context of the given TransformationScheme.

Parameters:

scheme - the transformation scheme

Returns:

the result of the computation of this Transformation.

getMetadata

VTLValueMetadata getMetadata(TransformationScheme scheme)

Checks and returns the metadata of this Transformation within the given TransformationScheme.

Parameters:

scheme - the transformation scheme

Returns:

the metadata of this Transformation.

Throws:

VTLException - if the metadata is incoherent within the given TransformationScheme.

getLineage

Lineage getLineage()

Get the lineage history of this transformation inside a given TransformationScheme.

Returns:

the transformation lineage

hashCode

int hashCode()

Overrides:

hashCode in class Object

equals

boolean equals(Object obj)

Overrides:

equals in class Object