com.h3c.util.dao

Interface DependentUpdater<P extends Storable<?>,T extends Transportable<? super T,?>>

Type Parameters:

P - type of the dependent persistent object.

T - type of the dependent transport object.

public interface DependentUpdater<P extends Storable<?>,T extends Transportable<? super T,?>>

Dependent updater.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(T dependent) Adds a new dependent.
void	delete(P dependent) Deletes a dependent.
void	update(P dependentTarget, T dependentSource) Updates a dependent.

Method Detail

add

void add(T dependent)

Adds a new dependent. It is usually enough adding the dependent entity to the collection of dependents. JPA will do the rest.

1. Create entity

   DependentEntity entity = new DependentEntity(dependent);

   DependentEntity entity = dependentDao.create(dependent,...);

2. Add entity to the collection of dependents

   dependents.add(dependentEntity);

3. (Optional) If the relation is bidirectional, set independent entity to the dependent

   dependent.setOwner(idependent);

Parameters:

dependent - the dependent to add.

update

void update(P dependentTarget,
          T dependentSource)

Updates a dependent. It is usually enough conforming the dependent entity and the transport object. JPA will do the rest.

Parameters:

dependentTarget - object to update.

dependentSource - object to take the data from.

delete

void delete(P dependent)

Deletes a dependent. It is usually enough deleting the dependent from the collection of dependents. JPA will do the rest.

Example:

dependents.remove(dependent);

Parameters:

dependent - dependent to delete.