Package io.microsphere.util

Class PriorityComparator

  • All Implemented Interfaces:
    java.util.Comparator<java.lang.Object>
    public class PriorityComparator
extends java.lang.Object
implements java.util.Comparator<java.lang.Object>
    A Comparator implementation that sorts objects based on the value of the Priority annotation.

    If an object does not have the Priority annotation, it is treated as having a default priority value of -1. If both objects lack the annotation, they are considered equal in priority.

    Example Usage

    
 List<Object> list = new ArrayList<>();
 list.add(new HighPriorityService());
 list.add(new LowPriorityService());
 Collections.sort(list, PriorityComparator.INSTANCE);

    Note: The comparison is consistent with equals only if the compared objects are of the same class or both lack the Priority annotation.

    Since:
    1.0.0
    Author:
    Mercy
    See Also:
    Priority

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int compare​(java.lang.Object o1, java.lang.Object o2)
      Compares two objects based on the value of their Priority annotation.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

      • Methods inherited from interface java.util.Comparator

        equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

    • Constructor Detail

      • PriorityComparator

        public PriorityComparator()

    • Method Detail

      • compare

        public int compare​(java.lang.Object o1,
                   java.lang.Object o2)
        Compares two objects based on the value of their Priority annotation.

        Example Usage

        
   PriorityComparator comparator = PriorityComparator.INSTANCE;
   int result = comparator.compare(serviceA, serviceB);
   if (result < 0) {
       System.out.println("serviceA has higher priority");
   }
        Specified by:
        compare in interface java.util.Comparator<java.lang.Object>
        Parameters:
        o1 - the first object to compare
        o2 - the second object to compare
        Returns:
        a negative integer, zero, or a positive integer as the first object's priority is less than, equal to, or greater than the second object's priority
        Since:
        1.0.0