Class ClosureComparator

src/main/java/groovy/util/ClosureComparator.java:31–55

A Comparator which uses a closure to compare 2 values being equal

 * A Comparator which uses a closure to compare 2 values being equal
 */
public class ClosureComparator<T> implements Comparator<T>, Serializable {

    @Serial private static final long serialVersionUID = -4593521535656429522L;

    /**
     * Closure used to compare two values.
     */
    Closure closure;

    /**
     * Creates a comparator backed by the supplied closure.
     *
     * @param closure the comparison closure
     */
    public ClosureComparator(Closure closure) {
        this.closure = closure;
    }

    /** {@inheritDoc} */
    @Override
    public int compare(T object1, T object2) {
        Object value = closure.call(object1, object2);
        return DefaultTypeTransformation.intUnbox(value);
    }
}