com.mckoi.database.interpret
Class ByColumn

java.lang.Object
  extended by com.mckoi.database.interpret.ByColumn
All Implemented Interfaces:
StatementTreeObject, java.io.Serializable, java.lang.Cloneable

public final class ByColumn
extends java.lang.Object
implements java.io.Serializable, StatementTreeObject, java.lang.Cloneable

Object used to represent a column in the 'order by' and 'group by' clauses of a select statement.

Author:
Tobias Downer
See Also:
Serialized Form

Field Summary
 boolean ascending
          If 'order by' then true if sort is ascending (default).
 Expression exp
          The expression that we are ordering by.
 Variable name
          The name of the column in the 'by'.
 
Constructor Summary
ByColumn()
           
 
Method Summary
 java.lang.Object clone()
          Performs a DEEP clone of this object if it is mutable, or a deep clone of its mutable members.
 void prepareExpressions(ExpressionPreparer preparer)
          Prepares all expressions in this statement tree object by passing the ExpressionPreparer object to the 'prepare' method of the expression.
 java.lang.String toString()
           
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

name

public Variable name
The name of the column in the 'by'.


exp

public Expression exp
The expression that we are ordering by.


ascending

public boolean ascending
If 'order by' then true if sort is ascending (default).

Constructor Detail

ByColumn

public ByColumn()
Method Detail

prepareExpressions

public void prepareExpressions(ExpressionPreparer preparer)
                        throws DatabaseException
Description copied from interface: StatementTreeObject
Prepares all expressions in this statement tree object by passing the ExpressionPreparer object to the 'prepare' method of the expression.

Specified by:
prepareExpressions in interface StatementTreeObject
Throws:
DatabaseException

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
Description copied from interface: StatementTreeObject
Performs a DEEP clone of this object if it is mutable, or a deep clone of its mutable members. If the object is immutable then it may return 'this'.

Specified by:
clone in interface StatementTreeObject
Overrides:
clone in class java.lang.Object
Throws:
java.lang.CloneNotSupportedException

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object