org.apache.qpid.filter

Class ArithmeticExpression<T>

java.lang.Object

org.apache.qpid.filter.BinaryExpression<T>

org.apache.qpid.filter.ArithmeticExpression<T>

All Implemented Interfaces:

Expression<T>

public abstract class ArithmeticExpression<T>
extends BinaryExpression<T>

An expression which performs an operation on two expression values

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	DOUBLE
protected static int	INTEGER
protected static int	LONG

Constructor Summary

Constructors

Constructor and Description
ArithmeticExpression(Expression<T> left, Expression<T> right)

Method Summary

Modifier and Type	Method and Description
protected Number	asNumber(Object value)
static <E> Expression<E>	createDivide(Expression<E> left, Expression<E> right)
static <E> Expression<E>	createMinus(Expression<E> left, Expression<E> right)
static <E> Expression<E>	createMod(Expression<E> left, Expression<E> right)
static <E> Expression<E>	createMultiply(Expression<E> left, Expression<E> right)
static <E> Expression<E>	createPlus(Expression<E> left, Expression<E> right)
protected Number	divide(Number left, Number right)
protected abstract Object	evaluate(Object lvalue, Object rvalue)
Object	evaluate(T message)
protected Number	minus(Number left, Number right)
protected Number	mod(Number left, Number right)
protected Number	multiply(Number left, Number right)
protected Number	plus(Number left, Number right)

Methods inherited from class org.apache.qpid.filter.BinaryExpression

equals, getExpressionSymbol, getLeft, getRight, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

INTEGER

protected static final int INTEGER

See Also:

Constant Field Values

LONG

protected static final int LONG

See Also:

Constant Field Values

DOUBLE

protected static final int DOUBLE

See Also:

Constant Field Values

Constructor Detail

ArithmeticExpression

public ArithmeticExpression(Expression<T> left,
                            Expression<T> right)

Method Detail

createPlus

public static <E> Expression<E> createPlus(Expression<E> left,
                                           Expression<E> right)

createMinus

public static <E> Expression<E> createMinus(Expression<E> left,
                                            Expression<E> right)

createMultiply

public static <E> Expression<E> createMultiply(Expression<E> left,
                                               Expression<E> right)

createDivide

public static <E> Expression<E> createDivide(Expression<E> left,
                                             Expression<E> right)

createMod

public static <E> Expression<E> createMod(Expression<E> left,
                                          Expression<E> right)

plus

protected Number plus(Number left,
                      Number right)

minus

protected Number minus(Number left,
                       Number right)

multiply

protected Number multiply(Number left,
                          Number right)

divide

protected Number divide(Number left,
                        Number right)

mod

protected Number mod(Number left,
                     Number right)

asNumber

protected Number asNumber(Object value)

evaluate

public Object evaluate(T message)

Parameters:

message - object to evaluate

Returns:

the value of this expression

evaluate

protected abstract Object evaluate(Object lvalue,
                                   Object rvalue)