It should be the registries that own the mappings and the factories should query the registry each time. Otherwise changes in a registry has no effect.

This effects all classes inheriting from MappingFactoryBase.

• info.magnolia.ui.dialog.action.DialogActionFactoryImpl
• info.magnolia.ui.form.field.validation.ValidatorFieldFactory
• info.magnolia.ui.admincentral.mediaeditor.editmode.factory.EditModeProviderFactory
• info.magnolia.ui.form.field.builder.FieldFactory
• info.magnolia.ui.form.action.FormActionFactoryImpl

The class MappingFactoryBase should be removed.

The lookup of implementation based on the class of the definition needs to go to the registries. We should introduce a base class for this since the logic will be identical for all of them. See MGNLUI-581 for changes pending for this logic.