ca.uqac.dim.turtledb

Class Renaming

java.lang.Object

ca.uqac.dim.turtledb.Relation

ca.uqac.dim.turtledb.UnaryRelation

ca.uqac.dim.turtledb.Renaming

public class Renaming
extends UnaryRelation

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	Renaming.ProjectionCacheIterator
protected class	Renaming.ProjectionStreamIterator

Nested classes/interfaces inherited from class ca.uqac.dim.turtledb.UnaryRelation

UnaryRelation.UnaryRelationCacheIterator, UnaryRelation.UnaryRelationStreamIterator

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<Attribute,Attribute>	m_renamedAttributes

Fields inherited from class ca.uqac.dim.turtledb.UnaryRelation

m_relation

Fields inherited from class ca.uqac.dim.turtledb.Relation

m_streamingMode

Constructor Summary

Constructors

Constructor and Description
Renaming(Relation rel)

Method Summary

Modifier and Type	Method and Description
void	accept(QueryVisitor v)
RelationIterator	cacheIterator() Returns an iterator over tuples of the relation
Schema	getSchema() Returns the relation's schema
Renaming	rename(Attribute from, Attribute to)
RelationStreamIterator	streamIterator() Returns an iterator over tuples of the relation

Methods inherited from class ca.uqac.dim.turtledb.UnaryRelation

setRelation, tupleCount

Methods inherited from class ca.uqac.dim.turtledb.Relation

contains, getCardinality, getDegree, isFragment, isLeaf, iterator, setStreamingMode, toString

Methods inherited from class java.lang.Object

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

Field Detail

m_renamedAttributes

protected java.util.Map<Attribute,Attribute> m_renamedAttributes

Constructor Detail

Renaming

public Renaming(Relation rel)

Method Detail

rename

public Renaming rename(Attribute from,
                       Attribute to)

getSchema

public Schema getSchema()

Description copied from class: Relation

Returns the relation's schema

Specified by:

getSchema in class Relation

Returns:

The schema

accept

public void accept(QueryVisitor v)
            throws QueryVisitor.VisitorException

Specified by:

accept in class Relation

Throws:

QueryVisitor.VisitorException

streamIterator

public RelationStreamIterator streamIterator()

Description copied from class: Relation

Returns an iterator over tuples of the relation

Specified by:

streamIterator in class Relation

Returns:

cacheIterator

public RelationIterator cacheIterator()

Description copied from class: Relation

Returns an iterator over tuples of the relation

Specified by:

cacheIterator in class Relation

Returns: