Module io.helidon.common.serviceloader
Package io.helidon.common.serviceloader

Class Priorities

  • public final class Priorities
extends Object
    Priority utilities.

    • Method Detail

      • find

        public static int find​(Class<?> aClass,
                       int defaultPriority)
        Find priority from class annotation, or return default if none found.
        Parameters:
        aClass - class to analyzed
        defaultPriority - default priority of this class
        Returns:
        priority from Priorityor the default provided

      • find

        public static int find​(Object anObject,
                       int defaultPriority)
        Find priority for an instance. First checks if instance is Prioritized. If so, uses the value from it. Then checks for Priority annotation. If none of the above is found, returns the default priority.
        Parameters:
        anObject - object to find priority for
        defaultPriority - default priority to use
        Returns:
        priority of the object or default provided

      • sort

        public static void sort​(List<? extends Prioritized> list)
        Sort the prioritized list based on priorities.
        Parameters:
        list - list to sort

      • sort

        public static void sort​(List<?> list,
                        int defaultPriority)
        Sort the list based on priorities.
        • If element implements Prioritized, uses its priority.
        • If element is a class and has annotation Priority, uses its priority
        • If element is any object and its class has annotation Priority, uses its priority
        Parameters:
        list - list to sort
        defaultPriority - default priority for elements that do not have it

      • priorityComparator

        public static <S> Comparator<S> priorityComparator​(int defaultPriority)
        Returns a comparator for two objects, the classes for which are implementations of Prioritized, and/or optionally annotated with Priority and which applies a specified default priority if either or both classes lack the annotation.
        Type Parameters:
        S - type of object being compared
        Parameters:
        defaultPriority - used if the classes for either or both objects lack the Priority annotation
        Returns:
        comparator