Package org.apache.juneau.swap

Class AutoNumberSwap<T>

java.lang.Object

org.apache.juneau.swap.ObjectSwap<T,Number>

org.apache.juneau.swap.AutoNumberSwap<T>

Type Parameters:

T - The normal class type.

public class AutoNumberSwap<T>
extends ObjectSwap<T,Number>

A dynamic object swap based on reflection of a Java class that converts Objects to Number serializable objects.

Looks for methods on the class that can be called to swap-in surrogate Number objects before serialization and swap-out surrogate Number objects after parsing.

Valid surrogate objects

• Any subclass of Number
• Any number primitive

Valid swap methods (S = Swapped type)

• public S toNumber()
• public S toNumber(BeanSession)
• public S toInteger()
• public S toInteger(BeanSession)
• public S toInt()
• public S toInt(BeanSession)
• public S toLong()
• public S toLong(BeanSession)
• public S toFloat()
• public S toFloat(BeanSession)
• public S toDouble()
• public S toDouble(BeanSession)
• public S toShort()
• public S toShort(BeanSession)
• public S toByte()
• public S toByte(BeanSession)

Valid unswap methods (N = Normal type, S = Swapped type)

• public static N fromInteger(S)
• public static N fromInteger(BeanSession, S)
• public static N fromInt(S)
• public static N fromInt(BeanSession, S)
• public static N fromLong(S)
• public static N fromLong(BeanSession, S)
• public static N fromFloat(S)
• public static N fromFloat(BeanSession, S)
• public static N fromDouble(S)
• public static N fromDouble(BeanSession, S)
• public static N fromShort(S)
• public static N fromShort(BeanSession, S)
• public static N fromByte(S)
• public static N fromByte(BeanSession, S)
• public static N create(S)
• public static N create(BeanSession, S)
• public static N valueOf(S)
• public static N valueOf(BeanSession, S)
• public N(S)

Classes are ignored if any of the following are true:

• Classes annotated with @BeanIgnore.
• Non-static member classes.

Members/constructors are ignored if any of the following are true:

• Members/constructors annotated with @BeanIgnore.
• Deprecated members/constructors.

See Also:

• Swaps

Field Summary

Fields inherited from class org.apache.juneau.swap.ObjectSwap

NULL

Method Summary

Modifier and Type	Method	Description
static ObjectSwap<?,?>	find(BeanContext bc, ClassInfo ci)	Look for constructors and methods on this class and construct a dynamic swap if it's possible to do so.
Number	swap(BeanSession session, Object o)	If this transform is to be used to serialize non-serializable objects, it must implement this method.
T	unswap(BeanSession session, Number o, ClassMeta<?> hint)	If this transform is to be used to reconstitute objects that aren't true Java beans, it must implement this method.

Methods inherited from class org.apache.juneau.swap.ObjectSwap

forMediaTypes, forMediaTypes, getNormalClass, getSwapClass, getSwapClassMeta, isNormalObject, isSwappedObject, match, swap, toString, unswap, withTemplate, withTemplate

Methods inherited from class java.lang.Object

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

Method Details

find

public static ObjectSwap<?,?> find(BeanContext bc,
 ClassInfo ci)

Look for constructors and methods on this class and construct a dynamic swap if it's possible to do so.

Parameters:

bc - The bean context to use for looking up annotations.

ci - The class to try to constructor a dynamic swap on.

Returns:

An object swap instance, or null if one could not be created.

swap

public Number swap(BeanSession session,
 Object o)
            throws SerializeException

Description copied from class: ObjectSwap

If this transform is to be used to serialize non-serializable objects, it must implement this method.

The object must be converted into one of the following serializable types:

• String
• Number
• Boolean
• Collection containing anything on this list.
• Map containing anything on this list.
• A java bean with properties of anything on this list.
• An array of anything on this list.

Overrides:

swap in class ObjectSwap<T,Number>

Parameters:

session - The bean session to use to get the class meta. This is always going to be the same bean context that created this swap.

o - The object to be transformed.

Returns:

The transformed object.

Throws:

SerializeException

unswap

public T unswap(BeanSession session,
 Number o,
 ClassMeta<?> hint)
         throws ParseException

Description copied from class: ObjectSwap

If this transform is to be used to reconstitute objects that aren't true Java beans, it must implement this method.

Overrides:

unswap in class ObjectSwap<T,Number>

Parameters:

session - The bean session to use to get the class meta. This is always going to be the same bean context that created this swap.

o - The transformed object.

hint - If possible, the parser will try to tell you the object type being created. For example, on a serialized date, this may tell you that the object being created must be of type GregorianCalendar.
This may be null if the parser cannot make this determination.

Returns:

The narrowed object.

Throws:

ParseException