com.mckoi.database
Class Assignment

java.lang.Object
  com.mckoi.database.Assignment

All Implemented Interfaces:

StatementTreeObject, java.io.Serializable, java.lang.Cloneable

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

An assignment from a variable to an expression. For example;

   value_of = value_of * 1.10
   name = concat("CS-", name)
   description = concat("LEGACY: ", upper(number));
 

Author:

Tobias Downer

See Also:

Serialized Form

Constructor Summary

Assignment(Variable variable, Expression expression)
Constructs the assignment.

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.
Expression	getExpression() Returns the Expression for this assignment.
Variable	getVariable() Returns the variable for this assignment.
void	prepareExpressions(ExpressionPreparer preparer) Prepares all expressions in this statement tree object by passing the ExpressionPreparer object to the 'prepare' method of the expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

Assignment

public Assignment(Variable variable,
                  Expression expression)

Constructs the assignment.

Method Detail

getVariable

public Variable getVariable()

Returns the variable for this assignment.

getExpression

public Expression getExpression()

Returns the Expression for this assignment.

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