org.apache.juneau.transform

Class SurrogateSwap<T,F>

java.lang.Object

org.apache.juneau.transform.PojoSwap<T,F>

org.apache.juneau.transform.SurrogateSwap<T,F>

Type Parameters:

T - The class type that this transform applies to.

F - The transformed class type.

public class SurrogateSwap<T,F>
extends PojoSwap<T,F>

Specialized PojoSwap for Surrogate classes.

Field Summary

Fields inherited from class org.apache.juneau.transform.PojoSwap

NULL

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SurrogateSwap(Class<T> forClass, Constructor<F> constructor, Method unswapMethod) Constructor.

Method Summary

Modifier and Type	Method and Description
static List<SurrogateSwap<?,?>>	findPojoSwaps(Class<?> c) Given the specified surrogate class, return the list of POJO swaps.
F	swap(BeanSession session, T o) If this transform is to be used to serialize non-serializable POJOs, it must implement this method.
T	unswap(BeanSession session, F f, ClassMeta<?> hint) If this transform is to be used to reconstitute POJOs that aren't true Java beans, it must implement this method.

Methods inherited from class org.apache.juneau.transform.PojoSwap

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

Constructor Detail

SurrogateSwap

protected SurrogateSwap(Class<T> forClass,
                        Constructor<F> constructor,
                        Method unswapMethod)

Constructor.

Parameters:

forClass - The normal class.

constructor - The constructor on the surrogate class that takes the normal class as a parameter.

unswapMethod - The static method that converts surrogate objects into normal objects.

Method Detail

findPojoSwaps

public static List<SurrogateSwap<?,?>> findPojoSwaps(Class<?> c)

Given the specified surrogate class, return the list of POJO swaps.

A transform is returned for each public 1-arg constructor found. Returns an empty list if no public 1-arg constructors are found.

Parameters:

c - The surrogate class.

Returns:

The list of POJO swaps that apply to this class.

swap

public F swap(BeanSession session,
              T o)
       throws SerializeException

Description copied from class: PojoSwap

If this transform is to be used to serialize non-serializable POJOs, 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 PojoSwap<T,F>

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,
                F f,
                ClassMeta<?> hint)
         throws ParseException

Description copied from class: PojoSwap

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

Overrides:

unswap in class PojoSwap<T,F>

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.

f - 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