Class InstanceComparator<T>

java.lang.Object
org.springframework.util.comparator.InstanceComparator<T>
Type Parameters:
T - the type of objects that may be compared by this comparator
All Implemented Interfaces:
Comparator<T>

public class InstanceComparator<T> extends Object implements Comparator<T>
Compares objects based on an arbitrary class order. Allows objects to be sorted based on the types of class that they inherit — for example, this comparator can be used to sort a list of Numbers such that Longs occur before Integers.

Only the specified instanceOrder classes are considered during comparison. If two objects are both instances of the ordered type this comparator will return a value of 0. Consider combining with Comparator.thenComparing(Comparator) if additional sorting is required.

Since:
3.2
Author:
Phillip Webb
See Also:
  • Constructor Details

    • InstanceComparator

      public InstanceComparator(Class<?>... instanceOrder)
      Create a new InstanceComparator instance.
      Parameters:
      instanceOrder - the ordered list of classes that should be used when comparing objects. Classes earlier in the list will be given a higher priority.
  • Method Details