Module com.aoapps.collections
Package com.aoapps.collections

Class PolymorphicRegistry<U>

  • public class PolymorphicRegistry<U>
extends Object
    A registry of objects by their class, along with all their parent classes and interfaces, up to and including an upper bound. The registry is highly concurrent, and performs registry lookups in O(1).
    Author:
    AO Industries, Inc.

    • Constructor Detail

      • PolymorphicRegistry

        public PolymorphicRegistry​(Class<U> upperBound)

    • Method Detail

      • add

        public void add​(U instance)
        Adds a instance to the registry. The instance is registered under all classes and interfaces it extends and implements, up to and including the upper bound U.

        This implementation favors lookup speed at O(1), and pays the price during add(java.lang.Object).

      • get

        public <T extends U> List<T> get​(Class<T> clazz)
        Gets all instances registered of the given class. They are returned in the order registered. When an object is registered more than once, it will appear in the list multiple times. The list is a snapshot and will not change over time.
        Returns:
        the unmodifiable list of all objects registered of the given class, or an empty list when none registered

      • get

        public <T extends U> List<T> get​(Class<T> clazz,
                                 Predicate<? super T> filter)
        Gets all instances registered of the given class that match the given filter. They are returned in the order registered. When an object is registered more than once, it will appear in the list multiple times. The list is a snapshot and will not change over time.
        Returns:
        the unmodifiable list of all objects registered of the given class that match the filter, or an empty list when none registered

      • getFirst

        public <T extends U> T getFirst​(Class<T> clazz)
        Gets the first instance registered of the given class.
        Returns:
        the first instance registered or null for none registered

      • getFirst

        public <T extends U> T getFirst​(Class<T> clazz,
                                Predicate<? super T> filter)
        Gets the first instance registered of the given class that match the given filter.
        Returns:
        the first instance registered that matches the filter or null for none registered

      • getLast

        public <T extends U> T getLast​(Class<T> clazz)
        Gets the last instance registered of the given class.
        Returns:
        the last instance registered or null for none registered

      • getLast

        public <T extends U> T getLast​(Class<T> clazz,
                               Predicate<? super T> filter)
        Gets the last instance registered of the given class that match the given filter.
        Returns:
        the last instance registered that matches the filter or null for none registered