Package manifold.ext.rt.api

Interface ComparableUsing<T>

All Superinterfaces:

Comparable<T>

public interface ComparableUsing<T>
extends Comparable<T>

Implement this Comparable extension to enable relational operators directly on your type. Normally you only need to implement Comparable#compareTo(T), the remaining method in this interface have default implementations suitable for most use-cases. However, if necessary you can override behavior for individual relational operators by overriding #compareToUsing(T,Operator).

Note implementing this interface automatically overloads == and !=. The default behavior delegates to compareTo(), but you can easily change the behavior by overriding equalityMode(), see ComparableUsing.EqualityMode options.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	ComparableUsing.EqualityMode	The mode indicating the method used to implement == and != operators.
static class	ComparableUsing.Operator	Relational operators to implement

Method Summary

Modifier and Type	Method	Description
default boolean	compareToUsing(T that, ComparableUsing.Operator op)	Compare this to that using op.
default ComparableUsing.EqualityMode	equalityMode()	The method used to handle == and !=

Methods inherited from interface java.lang.Comparable

compareTo

Method Detail

compareToUsing

default boolean compareToUsing(T that,
                               ComparableUsing.Operator op)

Compare this to that using op.

Calls to this method are generated for usage of >, >=, <, and <=. If equalityMode() returns CompareTo, calls to this method are also generated for == and !=.

Normally you do not need to implement this method because it delegates to your type's #compareTo(T) implementation. However, you can override this default implementation to customize behavior.

equalityMode

default ComparableUsing.EqualityMode equalityMode()

The method used to handle == and !=