org.castor.cpa.persistence.sql.query.condition
Class Compare

java.lang.Object
  org.castor.cpa.persistence.sql.query.QueryObject
      org.castor.cpa.persistence.sql.query.condition.Condition
          org.castor.cpa.persistence.sql.query.condition.Compare

public final class Compare
extends Condition

Compare 2 conditions with an operator.

Version:

$Revision$ $Date: 2006-04-25 15:08:23 -0600 (Tue, 25 Apr 2006) $

Author:

Ahmad Hassan, Ralf Joachim

Constructor Summary

Compare(Expression left, CompareOperator operator, Expression right)
Constructor a compare condition that compares given left and rigth hand operand with given comparison operator.

Method Summary

Expression	leftExpression() Returns left operand of the comparison.
Condition	not() Builder method to invert a condition.
CompareOperator	operator() Returns operator of comparison.
Expression	rightExpression() Returns right operand of the comparison.
void	toString(QueryContext ctx) Append a string representation of the object to the given QueryContext.

Methods inherited from class org.castor.cpa.persistence.sql.query.condition.Condition

and, or

Methods inherited from class org.castor.cpa.persistence.sql.query.QueryObject

toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Compare

public Compare(Expression left,
               CompareOperator operator,
               Expression right)

Constructor a compare condition that compares given left and rigth hand operand with given comparison operator.

Parameters:

left - Left operand of the comparison.

operator - Operator of comparison.

right - Right operand of the comparison.

Method Detail

leftExpression

public Expression leftExpression()

Returns left operand of the comparison.

Returns:

Left operand of the comparison.

operator

public CompareOperator operator()

Returns operator of comparison.

Returns:

Operator of comparison.

rightExpression

public Expression rightExpression()

Returns right operand of the comparison.

Returns:

right operand of the comparison.

not

public Condition not()

Description copied from class: Condition

Builder method to invert a condition. A condition that evaluated to TRUE before calling this method will evaluate to FALSE thereafter.

Specified by:

not in class Condition

Returns:

Negated condition.

toString

public void toString(QueryContext ctx)

Description copied from class: QueryObject

Append a string representation of the object to the given QueryContext. In general, this toString method appends a string that "textually represents" this object. The result should be a string in valid SQL syntax. It is required that all subclasses override this method.

Specified by:

toString in class QueryObject

Parameters:

ctx - QueryContext to append the string representation of the object to.