de.fuberlin.wiwiss.d2rq.expr
Class Negation

java.lang.Object
  extended by de.fuberlin.wiwiss.d2rq.expr.Expression
      extended by de.fuberlin.wiwiss.d2rq.expr.Negation

public class Negation
extends Expression

An expression that negates an underlying expression

Author:
Christian Becker

Field Summary
 
Fields inherited from class de.fuberlin.wiwiss.d2rq.expr.Expression
FALSE, TRUE
 
Constructor Summary
Negation(Expression base)
           
 
Method Summary
 Set<Attribute> attributes()
           
 Expression getBase()
           
 boolean isFalse()
           
 boolean isTrue()
           
 Expression renameAttributes(ColumnRenamer columnRenamer)
           
 String toSQL(ConnectedDB database, AliasMap aliases)
           
 String toString()
           
 
Methods inherited from class de.fuberlin.wiwiss.d2rq.expr.Expression
and, or
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Negation

public Negation(Expression base)
Method Detail

getBase

public Expression getBase()

attributes

public Set<Attribute> attributes()
Specified by:
attributes in class Expression

isFalse

public boolean isFalse()
Specified by:
isFalse in class Expression

isTrue

public boolean isTrue()
Specified by:
isTrue in class Expression

renameAttributes

public Expression renameAttributes(ColumnRenamer columnRenamer)
Specified by:
renameAttributes in class Expression

toSQL

public String toSQL(ConnectedDB database,
                    AliasMap aliases)
Specified by:
toSQL in class Expression

toString

public String toString()
Overrides:
toString in class Object