CoreFieldTransformer (EclipseLink 2.7.14, API Reference)

All Superinterfaces:

java.io.Serializable

All Known Subinterfaces:

FieldTransformer

All Known Implementing Classes:

ConstantTransformer, FieldTransformerAdapter, MethodBasedFieldTransformer
```
public interface CoreFieldTransformer<SESSION extends CoreSession>
extends java.io.Serializable
```
This interface is used by the Transformation Mapping to build the value for a specific field. The user must provide implementations of this interface to the Transformation Mapping.

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String BUILD_FIELD_VALUE_METHOD
Method name should be same as the value of this field.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.lang.Object`	`buildFieldValue(java.lang.Object instance, java.lang.String fieldName, SESSION session)`

- Field Detail
  - BUILD_FIELD_VALUE_METHOD
```
static final java.lang.String BUILD_FIELD_VALUE_METHOD
```
    Method name should be same as the value of this field. This field is used to find method name in reflection call.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - buildFieldValue
```
java.lang.Object buildFieldValue(java.lang.Object instance,
                                 java.lang.String fieldName,
                                 SESSION session)
```
    Parameters:
    
    instance - - an instance of the domain class which contains the attribute
    
    session - - the current session
    
    fieldName - - the name of the field being transformed. Used if the user wants to use this transformer for multiple fields.
    
    Returns:
    
    - The value to be written for the field associated with this transformer