static EntityManagerEntry tryToFindEntityManagerEntryInTarget()

in jee-modules/jpa-module/impl/src/main/java/org/apache/myfaces/extensions/cdi/jpa/impl/PersistenceHelper.java [71:122]

42 lines of code
7 McCabe index (conditional complexity)


    static EntityManagerEntry tryToFindEntityManagerEntryInTarget(Object target)
    {
        Map<String, PersistenceContextMetaEntry> mapping = persistenceContextMetaEntries.get(getClassLoader());

        mapping = initMapping(mapping);

        String key = target.getClass().getName();
        PersistenceContextMetaEntry persistenceContextEntry = mapping.get(key);

        if( persistenceContextEntry != null && NO_FIELD_MARKER.equals(persistenceContextEntry.getFieldName()))
        {
            return null;
        }

        if(persistenceContextEntry == null)
        {
            persistenceContextEntry = findPersistenceContextEntry(target.getClass());

            if(persistenceContextEntry == null)
            {
                mapping.put(key, new PersistenceContextMetaEntry(
                        Object.class, NO_FIELD_MARKER, Default.class.getName(), false));
                return null;
            }

            mapping.put(key, persistenceContextEntry);
        }

        Field entityManagerField;
        try
        {
            entityManagerField = persistenceContextEntry.getSourceClass()
                    .getDeclaredField(persistenceContextEntry.getFieldName());
        }
        catch (NoSuchFieldException e)
        {
            //TODO add logging in case of project stage dev.
            return null;
        }

        entityManagerField.setAccessible(true);
        try
        {
            EntityManager entityManager = (EntityManager)entityManagerField.get(target);
            return new EntityManagerEntry(entityManager, persistenceContextEntry);
        }
        catch (IllegalAccessException e)
        {
            //TODO add logging in case of project stage dev.
            return null;
        }
    }