Examples of javax.jdo.spi.PersistenceCapable

javax.jdo.spi.PersistenceCapable
A class that can be managed by a binary-compatible JDO implementation must implement this interface.
This interface defines methods that allow the implementation to manage the instances. It also defines methods that allow a JDO aware application to examine the runtime state of instances. For example, an application can discover whether the instance is persistent, transactional, dirty, new, deleted, or detached; and to get its associated PersistenceManager, object identity, and version if it has one.
In the Reference Implementation, the JDO Enhancer modifies the class to implement PersistenceCapable prior to loading the class into the runtime environment. The Reference Enhancer also adds code to implement the methods defined by PersistenceCapable.
The extra methods in the PersistenceCapable interface might be generated by pre-processing a .java file, or might be generated from a tool directly. The exact technique for generating the extra methods is not specified by JDO.
The PersistenceCapable interface is designed to avoid name conflicts in the scope of user-defined classes. All of its declared method names are prefixed with 'jdo'. @version 2.0

    
    public ObjectAdapter lazilyLoaded(Object pojo) {
        if(!(pojo instanceof PersistenceCapable)) {
            return null;
        } 
        final PersistenceCapable persistenceCapable = (PersistenceCapable) pojo;
        return frameworkSynchronizer.lazilyLoaded(persistenceCapable, CalledFrom.OS_LAZILYLOADED);
    }

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public class Utils {


    @SuppressWarnings("unused")
    private static Object jdoObjectIdFor(InstanceLifecycleEvent event) {
        PersistenceCapable persistenceCapable = Utils.persistenceCapableFor(event);
        Object jdoObjectId = persistenceCapable.jdoGetObjectId();
        return jdoObjectId;
    }

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    public void postLoadProcessingFor(final PersistenceCapable pojo, CalledFrom calledFrom) {


        withLogging(pojo, new Runnable() {
            @Override
            public void run() {
                final PersistenceCapable pc = pojo;
                final Version datastoreVersion = getVersionIfAny(pc);
                
                final RootOid originalOid ;
                ObjectAdapter originalAdapter = getAdapterManager().getAdapterFor(pojo);
                if(originalAdapter != null) {

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        //
        ext = pmJDOI.getExtent(User.class, true);
        iter = ext.iterator();
        while (iter.hasNext()) {
            PersistenceCapable itemCurso = (PersistenceCapable) iter.next();
            if (itemCurso != null) {
                setPersistentes.add(itemCurso);
            }


        }


        //
        ext = pmJDOI.getExtent(Curso.class, true);
        iter = ext.iterator();
        while (iter.hasNext()) {
            PersistenceCapable itemCurso = (PersistenceCapable) iter.next();
            if (itemCurso != null) {
                setPersistentes.add(itemCurso);
            }


        }
        //
        ext = pmJDOI.getExtent(Alumno.class, true);
        iter = ext.iterator();
        while (iter.hasNext()) {
            PersistenceCapable itemCurso = (PersistenceCapable) iter.next();
            if (itemCurso != null) {
                setPersistentes.add(itemCurso);
            }


        }
        //
        ext = pmJDOI.getExtent(Persona.class, true);
        iter = ext.iterator();
        while (iter.hasNext()) {
            PersistenceCapable itemCurso = (PersistenceCapable) iter.next();
            if (itemCurso != null) {
                setPersistentes.add(itemCurso);
            }


        }


        //
        ext = pmJDOI.getExtent(Periodo.class, true);
        iter = ext.iterator();
        while (iter.hasNext()) {
            PersistenceCapable itemCurso = (PersistenceCapable) iter.next();
            if (itemCurso != null) {
                setPersistentes.add(itemCurso);
            }


        }


        //
        ext = pmJDOI.getExtent(Pago.class, true);
        iter = ext.iterator();
        while (iter.hasNext()) {
            PersistenceCapable itemCurso = (PersistenceCapable) iter.next();
            if (itemCurso != null) {
                setPersistentes.add(itemCurso);
            }


        }
        //
        ext = pmJDOI.getExtent(CuotaBasica.class, true);
        iter = ext.iterator();
        while (iter.hasNext()) {
            PersistenceCapable itemCurso = (PersistenceCapable) iter.next();
            if (itemCurso != null) {
                setPersistentes.add(itemCurso);
            }


        }

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        }
    }


    public void postDelete( InstanceLifecycleEvent evt )
    {
        PersistenceCapable obj = ( (PersistenceCapable) evt.getSource() );


        if ( obj == null )
        {
            // Do not track null objects.
            // These events are typically a product of an internal lifecycle event.

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    public void persist(Object entity) {
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("JPA Persist - entity: " + entity);
        }
        if (entity instanceof PersistenceCapable) {
            PersistenceCapable pc = (PersistenceCapable) entity;
            if (pc.jdoIsDetached()) {
                /**
                 * Sec - 3.2.2
                 * If X is a detached object, the EntityExistsException may be thrown when the persist
                 * operation is invoked, or the EntityExistsException or another PersistenceException may be thrown
                 * at flush or commit time
                 */
                throwException(new EntityExistsException("Entity already exists. Use merge to save changes."));
            }
            // We may have added a state manager which is not needed for persist calls
            StateManager sm = om.findStateManager(entity);
            if (sm != null) {
                if (sm instanceof ForceJPAStateManagerImpl) {
                    om.clearDirty(sm);
                    om.removeStateManager(sm);
                    pc.jdoReplaceStateManager(null);
                } else {
                    /**
                     * Sec - 3.2.2
                     * If X is a preexisting managed entity, it is ignored by the persist operation. However, the persist
                     * operation is cascaded to entities referenced by X, if the relationships from X to these other

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    public Object merge(Object entity) {
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("JPA Merge: - entity: " + entity);
        }
        if (entity instanceof PersistenceCapable) {
            PersistenceCapable pc = (PersistenceCapable) entity;
            if (pc.jdoIsDetached() && pc.jdoGetObjectId() == null) {
                throw new IllegalArgumentException("Detached entity with null id cannot be merged.");
            }
            // Read id from entity
            StateManager sm = om.findStateManager(entity);
            if (sm != null) {

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    public ObjectAdapter lazilyLoaded(Object pojo) {
        if(!(pojo instanceof PersistenceCapable)) {
            return null;
        } 
        final PersistenceCapable persistenceCapable = (PersistenceCapable) pojo;
        return frameworkSynchronizer.lazilyLoaded(persistenceCapable, CalledFrom.OS_LAZILYLOADED);
    }

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        }
    }


    public void postDelete( InstanceLifecycleEvent evt )
    {
        PersistenceCapable obj = ( (PersistenceCapable) evt.getSource() );


        if ( obj == null )
        {
            // Do not track null objects.
            // These events are typically a product of an internal lifecycle event.

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     * @param pojos the OJB pojos as obtained by the broker
     * @return the collection of JDO PersistenceCapable instances
     */
    protected Collection provideStateManagers(Collection pojos)
    {
      PersistenceCapable pc;
      int [] fieldNums;
      Iterator iter = pojos.iterator();
      Collection result = new ArrayList();
      
      while (iter.hasNext())
      {
        // obtain a StateManager
        pc = (PersistenceCapable) iter.next();
        Identity oid = new Identity(pc, broker);
        StateManagerInternal smi = pmi.getStateManager(oid, pc.getClass()); 
        
        // fetch attributes into StateManager
      JDOClass jdoClass = Helper.getJDOClass(pc.getClass());
      fieldNums = jdoClass.getManagedFieldNumbers();


      FieldManager fm = new OjbFieldManager(pc, broker);
      smi.replaceFields(fieldNums, fm);
      smi.retrieve();

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