[DELTASPIKE-606] Simplified DTO mapping for Entity updates

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: Data-Module
• Assignee: Thomas Hug
• Reporter: Thomas Hug
• Created: 25/May/14 14:57
• Updated: 17/Jun/14 17:07
• Resolved: 26/May/14 14:46

Description

Updating a DTO currently still requires custom code in a mapper. This should be reduced to a minimum in the mapper base class.

SimpleQueryInOutMapperBase:

@Inject
private QueryInvocationContext context;

protected abstract Object getPrimaryKey(Dto dto);

protected E findEntity(Object pk)
{
    return (E) context.getEntityManager().find(context.getEntityClass(), pk);
} 

@Override
public Object mapParameter(final Object parameter)
{
    Object pk = getPrimaryKey((Dto) parameter);
    if (pk != null)
    {
        E entity = findEntity(pk);
        return toEntity(entity, (Dto) parameter);
    }
    return toEntity(newEntity(), (Dto) parameter);
}

Note that this is an API breaking change (toEntity).