org.glassfish.jersey.model.internal.RankedComparator Maven / Gradle / Ivy
/*
* Copyright (c) 2012, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.jersey.model.internal;
import java.util.Comparator;
/**
* Comparator used to sort types by their priorities defined by theirs binding priority set during the configuration phase
* ({@link jakarta.ws.rs.core.Configuration}) in {@link RankedProvider ranked provider}.
*
* @param Type of the elements to be sorted.
*
* @author Miroslav Fuksa
* @author Michal Gajdos
*/
public class RankedComparator implements Comparator> {
/**
* Defines which ordering should be used for sorting.
*/
public enum Order {
/**
* Ascending order. The lowest priority first, the highest priority last.
*/
ASCENDING(1),
/**
* Ascending order. The highest priority first, the lowest priority last.
*/
DESCENDING(-1);
private final int ordering;
private Order(int ordering) {
this.ordering = ordering;
}
}
private final Order order;
public RankedComparator() {
this(Order.ASCENDING);
}
public RankedComparator(final Order order) {
this.order = order;
}
@Override
public int compare(final RankedProvider o1, final RankedProvider o2) {
return ((getPriority(o1) > getPriority(o2)) ? order.ordering : -order.ordering);
}
protected int getPriority(final RankedProvider rankedProvider) {
return rankedProvider.getRank();
}
}