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

Class Compare

java.lang.Object

org.castor.cpa.persistence.sql.query.condition.Condition

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

All Implemented Interfaces:

QueryObject

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

Constructors

Constructor and Description
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

Methods

Modifier and Type	Method and Description
void	accept(Visitor visitor) Accept method to handle incoming visitors.
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.
String	toString() Method constructing query string.

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

and, or

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.

accept

public void accept(Visitor visitor)

Accept method to handle incoming visitors.

Parameters:

visitor - Visitor to be handled.

toString

public String toString()

Method constructing query string.

Overrides:

toString in class Object

Returns:

Constructed query string.