net.sf.bddbddb.ir.highlevel
Class Project

java.lang.Object
  net.sf.bddbddb.ir.Operation
      net.sf.bddbddb.ir.highlevel.HighLevelOperation
          net.sf.bddbddb.ir.highlevel.Project

All Implemented Interfaces:

IterationElement

public class Project
extends HighLevelOperation

Project

Version:

$Id: Project.java 445 2005-02-21 02:32:50Z cs343 $

Author:

jwhaley

Field Summary

Fields inherited from class net.sf.bddbddb.ir.Operation

id, TRACE_VERBOSE

Constructor Summary

Project(Relation r0, Relation r1)

Method Summary

Operation	copy()
java.util.List	getAttributes()
java.lang.String	getExpressionString()
Relation	getRelationDest()
Relation	getSrc()
java.util.List	getSrcs()
void	replaceSrc(Relation r_old, Relation r_new)
void	setRelationDest(Relation r0)
java.lang.String	toString()
java.lang.Object	visit(HighLevelOperationVisitor i)

Methods inherited from class net.sf.bddbddb.ir.highlevel.HighLevelOperation

visit

Methods inherited from class net.sf.bddbddb.ir.Operation

getNumberOfOperations, getRenames

Methods inherited from class java.lang.Object

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

Constructor Detail

Project

public Project(Relation r0,
               Relation r1)

Parameters:

r0 -

r1 -

Method Detail

toString

public java.lang.String toString()

Specified by:

toString in class Operation

getExpressionString

public java.lang.String getExpressionString()

Specified by:

getExpressionString in class Operation

Returns:

the expression in string form

visit

public java.lang.Object visit(HighLevelOperationVisitor i)

Specified by:

visit in class HighLevelOperation

Parameters:

i - the visitor

Returns:

the result from the visitor

getRelationDest

public Relation getRelationDest()

Specified by:

getRelationDest in class Operation

Returns:

the destination relation of this operation, or null

getSrcs

public java.util.List getSrcs()

Specified by:

getSrcs in class Operation

Returns:

the source relation of this operation

getSrc

public Relation getSrc()

Returns:

Returns the source relation.

getAttributes

public java.util.List getAttributes()

Returns:

list of attributes being projected

copy

public Operation copy()

Specified by:

copy in class Operation

replaceSrc

public void replaceSrc(Relation r_old,
                       Relation r_new)

Specified by:

replaceSrc in class Operation

setRelationDest

public void setRelationDest(Relation r0)

Specified by:

setRelationDest in class Operation