Package org.soulwing.prospecto.runtime.listener

Class ConcreteTransformationService

java.lang.Object

org.soulwing.prospecto.runtime.listener.ConcreteTransformationService

All Implemented Interfaces:

TransformationService

public class ConcreteTransformationService
extends Object
implements TransformationService

A TransformationService implementation.

Author:

Carl Harris

Field Summary

Fields

Modifier and Type	Field	Description
static ConcreteTransformationService	INSTANCE

Method Summary

Modifier and Type	Method	Description
Object	valueToExtract(Object owner, Object modelValue, ViewNode node, ScopedViewContext context)	Derives the value to extract for a model property.
Object	valueToInject(ViewEntity ownerEntity, Class<?> type, Object viewValue, ViewNode node, ScopedViewContext context)	Derives the value to inject for a model property.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final ConcreteTransformationService INSTANCE

Method Detail

valueToExtract

public Object valueToExtract(Object owner,
                             Object modelValue,
                             ViewNode node,
                             ScopedViewContext context)
                      throws Exception

Description copied from interface: TransformationService

Derives the value to extract for a model property.

Property listeners on the view context are first allowed to transform the value as desired. Then a value type converter (if available) is used to converter the transformed model value to its view representation.

Specified by:

valueToExtract in interface TransformationService

Parameters:

owner - owner of the property in the model

modelValue - value of the property in model representation

node - associated view node

context - view context

Returns:

derived view property value

Throws:

Exception

valueToInject

public Object valueToInject(ViewEntity ownerEntity,
                            Class<?> type,
                            Object viewValue,
                            ViewNode node,
                            ScopedViewContext context)
                     throws Exception

Description copied from interface: TransformationService

Derives the value to inject for a model property.

The view value is first converted to an instance of the model data type. Then property listeners on the view context are allowed to transform the value as desired to arrive at the resulting derived value.

Specified by:

valueToInject in interface TransformationService

Parameters:

ownerEntity - view entity representing the owner of the property

type - property type in the model

viewValue - value of the property in view representation

node - associated view node

context - view context

Returns:

derived model property value

Throws:

Exception