Package it.bancaditalia.oss.vtl.impl.transform.ops

Class JoinTransformation

java.lang.Object

it.bancaditalia.oss.vtl.impl.transform.TransformationImpl

it.bancaditalia.oss.vtl.impl.transform.ops.JoinTransformation

All Implemented Interfaces:

Transformation, Serializable

public class JoinTransformation
extends TransformationImpl

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	JoinTransformation.JoinOperand
static class	JoinTransformation.JoinOperator

Constructor Summary

Constructors

Constructor	Description
JoinTransformation(JoinTransformation.JoinOperator operator, List<JoinTransformation.JoinOperand> operands, List<String> using, Transformation filter, Transformation apply, Transformation calc, Transformation aggr, Transformation keepOrDrop, Transformation rename)

Method Summary

Modifier and Type	Method	Description
Lineage	computeLineage()
VTLValueMetadata	computeMetadata(TransformationScheme scheme)
boolean	equals(Object obj)
DataSet	eval(TransformationScheme scheme)	Evaluates this transformation in the context of the given TransformationScheme.
DataSetMetadata	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()
String	toString()

Methods inherited from class it.bancaditalia.oss.vtl.impl.transform.TransformationImpl

getLineage

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

JoinTransformation

public JoinTransformation(JoinTransformation.JoinOperator operator,
                          List<JoinTransformation.JoinOperand> operands,
                          List<String> using,
                          Transformation filter,
                          Transformation apply,
                          Transformation calc,
                          Transformation aggr,
                          Transformation keepOrDrop,
                          Transformation rename)

Method Detail

isTerminal

public boolean isTerminal()

Returns:

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

getTerminals

public Set<LeafTransformation> getTerminals()

Description copied from interface: Transformation

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

Returns:

the set

eval

public DataSet eval(TransformationScheme scheme)

Description copied from interface: Transformation

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

public DataSetMetadata getMetadata(TransformationScheme scheme)

Description copied from interface: Transformation

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

Parameters:

scheme - the transformation scheme

Returns:

the metadata of this Transformation.

computeMetadata

public VTLValueMetadata computeMetadata(TransformationScheme scheme)

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Transformation

Specified by:

hashCode in class TransformationImpl

equals

public boolean equals(Object obj)

Specified by:

equals in interface Transformation

Specified by:

equals in class TransformationImpl

computeLineage

public Lineage computeLineage()

Specified by:

computeLineage in class TransformationImpl