ReferenceAdapterV2 (EclipseLink 2.7.12, API Reference)

java.lang.Object
- javax.xml.bind.annotation.adapters.XmlAdapter<T,T>
- - org.eclipse.persistence.jpa.rs.util.xmladapters.ReferenceAdapterV2<T>

Type Parameters:

T - entity class of this adapter
```
public class ReferenceAdapterV2<T extends org.eclipse.persistence.internal.weaving.PersistenceWeavedRest>
extends XmlAdapter<T,T>
```
Reference adapter used in JPARS V2. Main purpose of this adapter is retrieving an entity by link when unmarshalling.

Author:

Dmitry Kornilov

Since:

EclipseLink 2.6.0

Field Summary

Fields
Modifier and Type Field Description

protected PersistenceContext context

Constructor Summary

Constructors
Constructor Description

ReferenceAdapterV2()

ReferenceAdapterV2(PersistenceContext context)
Instantiates a new reference adapter.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`T`	`marshal(T o)`	Marshal just passes through.
`T`	`unmarshal(T o)`	If 'canonical' or 'self' link is present loads entity from the database.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - context
```
protected PersistenceContext context
```
- Constructor Detail
  - ReferenceAdapterV2
```
public ReferenceAdapterV2()
```
  - ReferenceAdapterV2
```
public ReferenceAdapterV2(PersistenceContext context)
```
    Instantiates a new reference adapter.
    
    Parameters:
    
    context - persistent context (mandatory)
- Method Detail
  - marshal
```
public T marshal(T o)
          throws java.lang.Exception
```
    Marshal just passes through.
    
    Specified by:
    
    marshal in class XmlAdapter<T extends org.eclipse.persistence.internal.weaving.PersistenceWeavedRest,T extends org.eclipse.persistence.internal.weaving.PersistenceWeavedRest>
    
    Parameters:
    
    o -
    
    Returns:
    
    Throws:
    
    java.lang.Exception
  - unmarshal
```
public T unmarshal(T o)
            throws java.lang.Exception
```
    If 'canonical' or 'self' link is present loads entity from the database. Otherwise uses data provided.
    
    Specified by:
    
    unmarshal in class XmlAdapter<T extends org.eclipse.persistence.internal.weaving.PersistenceWeavedRest,T extends org.eclipse.persistence.internal.weaving.PersistenceWeavedRest>
    
    Parameters:
    
    o - The value to be converted. Can be null.
    
    Throws:
    
    java.lang.Exception - if there's an error during the conversion. The caller is responsible for reporting the error to the user through ValidationEventHandler.