Technical Architecture

{
  "metaObject": {
    "name": "Customer",
    "type": "entity",
    "version": "1.2",
    "namespace": "com.company.core",
    "attributes": {
      "table": "customers",
      "cacheable": true,
      "auditable": true
    },
    "children": [
      {
        "field": {
          "name": "id",
          "type": "long",
          "key": "primary",
          "generated": true
        }
      },
      {
        "field": {
          "name": "email",
          "type": "string",
          "validation": ["required", "email", "unique"],
          "maxLength": 255,
          "pii": true
        }
      }
    ]
  }
}

Core Types:
• string → String/string/str
• long → Long/number/int
• decimal → BigDecimal/number/Decimal
• boolean → Boolean/boolean/bool
• date → LocalDate/Date/datetime
• datetime → LocalDateTime/Date/datetime
• binary → byte[]/Uint8Array/bytes

Complex Types:
• object → Custom class/interface/class
• array → List<T>/T[]/List[T]
• map → Map<K,V>/Record<K,V>/Dict[K,V]

Validation Types:
• email, phone, url, regex
• min, max, minLength, maxLength
• required, unique, indexed

@Entity
@Table(name = "customers")
@Cacheable
@Audited
public class Customer {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    @Column(name = "email", unique = true, 
            nullable = false, length = 255)
    @Email
    @PersonalData
    private String email;
    
    // Generated constructors, getters, setters
    // Generated builder pattern
    // Generated equals/hashCode/toString
}

export interface Customer {
  id: number;
  email: string;
}

export const CustomerSchema = z.object({
  id: z.number().int().positive(),
  email: z.string().email().max(255),
});

export class CustomerValidator {
  static validate(data: unknown): Customer {
    return CustomerSchema.parse(data);
  }
  
  static isValid(data: unknown): boolean {
    return CustomerSchema.safeParse(data).success;
  }
}

@Service
public class MetaDataRegistry {
    private final ConcurrentHashMap<String, MetaObject> cache;
    private final MetaDataStore store;
    
    public MetaObject getMetaObject(String name) {
        return cache.computeIfAbsent(name, 
            k -> store.loadMetaObject(k));
    }
    
    public void invalidateCache(String name) {
        cache.remove(name);
        eventBus.publish(new MetaObjectChanged(name));
    }
    
    // Hot-reload support
    @EventListener
    public void onMetaDataChange(MetaDataChangeEvent event) {
        invalidateCache(event.getObjectName());
    }
}

@Component
public class DynamicEntityProcessor {
    
    public void processEntity(String entityType, 
                            Map<String, Object> data) {
        MetaObject meta = registry.getMetaObject(entityType);
        
        // Validate using current metadata
        ValidationResult result = validator.validate(meta, data);
        if (!result.isValid()) {
            throw new ValidationException(result.getErrors());
        }
        
        // Process each field dynamically
        for (MetaField field : meta.getFields()) {
            Object value = data.get(field.getName());
            processField(field, value);
        }
    }
    
    private void processField(MetaField field, Object value) {
        // Handle new fields automatically
        if (field.hasAttribute("newField")) {
            handleNewField(field, value);
        }
        
        // Apply compliance rules
        if (field.isPII()) {
            applyPIIProtection(field, value);
        }
    }
}