com.sun.jdo.spi.persistence.support.sqlstore.query.util.type

Class NumericType

java.lang.Object

com.sun.jdo.spi.persistence.support.sqlstore.query.util.type.Type

com.sun.jdo.spi.persistence.support.sqlstore.query.util.type.PrimitiveType

com.sun.jdo.spi.persistence.support.sqlstore.query.util.type.NumericType

All Implemented Interfaces:

NumberType

Direct Known Subclasses:

FloatingPointType, IntegralType

public abstract class NumericType
extends PrimitiveType
implements NumberType

This class is the super class for all integral and floating point types.

Version:

0.1

Author:

Michael Bouschen

Field Summary

Fields inherited from class com.sun.jdo.spi.persistence.support.sqlstore.query.util.type.PrimitiveType

wrapper

Fields inherited from class com.sun.jdo.spi.persistence.support.sqlstore.query.util.type.Type

clazz, enumType, name

Constructor Summary

Constructors

Constructor and Description
NumericType(String name, Class clazz, int enumType)

Method Summary

Modifier and Type	Method and Description
abstract Number	getValue(Number value) Converts the specified value into a value of this numeric type.
boolean	isOrderable() A numeric type defines an ordering.
abstract Number	negate(Number value) Returns -value.

Methods inherited from class com.sun.jdo.spi.persistence.support.sqlstore.query.util.type.PrimitiveType

getWrapper, isCompatibleWith, setWrapper

Methods inherited from class com.sun.jdo.spi.persistence.support.sqlstore.query.util.type.Type

equals, getEnumType, getJavaClass, getName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

NumericType

public NumericType(String name,
                   Class clazz,
                   int enumType)

Method Detail

isOrderable

public boolean isOrderable()

A numeric type defines an ordering.

Overrides:

isOrderable in class Type

Returns:

true if an order is defined for this; false otherwise.

getValue

public abstract Number getValue(Number value)

Converts the specified value into a value of this numeric type. E.g. an Integer is converted into a Double, if this represents the numeric type double.

Specified by:

getValue in interface NumberType

Parameters:

value - value to be converted

Returns:

converted value

negate

public abstract Number negate(Number value)

Returns -value.

Specified by:

negate in interface NumberType

Parameters:

value - value to be negated

Returns:

-value