org.argeo.api.register/src/org/argeo/api/register/ComponentRegister.java

   1 package org.argeo.api.register;
   2
   3 import java.util.Map;
   4 import java.util.SortedSet;
   5 import java.util.function.Predicate;
   6
   7 /** A register of components which can coordinate their activation. */
   8 public interface ComponentRegister {
   9         long register(Component<?> component);
  10
  11         <T> SortedSet<Component<? extends T>> find(Class<T> clss, Predicate<Map<String, Object>> filter);
  12
  13         default <T> Component.PublishedType<T> getSingleton(Class<T> type) {
  14                 SortedSet<Component<? extends T>> found = find(type, null);
  15                 if (found.size() == 0)
  16                         throw new IllegalStateException("No component found for " + type);
  17                 return found.first().getType(type);
  18         }
  19
  20         default <T> T getObject(Class<T> clss) {
  21                 SortedSet<Component<? extends T>> found = find(clss, null);
  22                 if (found.size() == 0)
  23                         return null;
  24                 return found.first().get();
  25         }
  26
  27         Component<?> get(Object instance);
  28
  29 //      default <T> PublishedType<T> getType(Class<T> clss) {
  30 //              SortedSet<Component<? extends T>> components = find(clss, null);
  31 //              if (components.size() == 0)
  32 //                      return null;
  33 //              return components.first().getType(clss);
  34 //      }
  35
  36         void activate();
  37
  38         void deactivate();
  39
  40         boolean isActive();
  41
  42         void clear();
  43 }