BackrefPropertyAccessor (Hibernate Core Aggregator 3.6.10.Final API)

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java.lang.Object
- org.hibernate.property.BackrefPropertyAccessor

All Implemented Interfaces:

PropertyAccessor
```
public class BackrefPropertyAccessor
extends Object
implements PropertyAccessor
```
Represents a "back-reference" to the id of a collection owner. A "back-reference" is pertinent in mapping scenarios where we have a uni-directional one-to-many association in which only the many side is mapped. In this case it is the collection itself which is responsible for the FK value.
In this scenario, the one side has no inherent knowledge of its "owner". So we introduce a synthetic property into the one side to represent the association; a so-called back-reference.

Author:

Gavin King, Steve Ebersole

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`class`	`BackrefPropertyAccessor.BackrefGetter` Internal implementation of a property getter specific to these back-ref properties.
`static class`	`BackrefPropertyAccessor.BackrefSetter` Internal implementation of a property setter specific to these back-ref properties.

Field Summary

Fields
Modifier and Type Field and Description

static Serializable UNKNOWN
A placeholder for a property value, indicating that we don't know the value of the back reference

Constructor Summary

Constructors
Constructor and Description

BackrefPropertyAccessor(String collectionRole, String entityName)
Constructs a new instance of BackrefPropertyAccessor.

Method Summary

Methods
Modifier and Type	Method and Description
`Getter`	`getGetter(Class theClass, String propertyName)` Create a "getter" for the named attribute
`Setter`	`getSetter(Class theClass, String propertyName)` Create a "setter" for the named attribute

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

- Field Detail
  - UNKNOWN
```
public static final Serializable UNKNOWN
```
    A placeholder for a property value, indicating that we don't know the value of the back reference
- Constructor Detail
  - BackrefPropertyAccessor
```
public BackrefPropertyAccessor(String collectionRole,
                       String entityName)
```
    Constructs a new instance of BackrefPropertyAccessor.
    
    Parameters:
    collectionRole - The collection role which this back ref references.
    entityName - The owner's entity name.
- Method Detail
  - getSetter
```
public Setter getSetter(Class theClass,
               String propertyName)
```
    Create a "setter" for the named attribute
    
    Specified by:
    
    getSetter in interface PropertyAccessor
    
    Parameters:
    theClass - The class on which the property is defined.
    propertyName - The name of the property.
    
    Returns:
    An appropriate setter
  - getGetter
```
public Getter getGetter(Class theClass,
               String propertyName)
```
    Create a "getter" for the named attribute
    
    Specified by:
    
    getGetter in interface PropertyAccessor
    
    Parameters:
    theClass - The class on which the property is defined.
    propertyName - The name of the property.
    
    Returns:
    An appropriate getter.

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