1 /*
2 * Copyright 2012 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package io.netty.util;
17
18 /**
19 * A singleton which is safe to compare via the {@code ==} operator. Created and managed by {@link ConstantPool}.
20 */
21 public interface Constant<T extends Constant<T>> extends Comparable<T> {
22
23 /**
24 * Returns the unique number assigned to this {@link Constant}.
25 */
26 int id();
27
28 /**
29 * Returns the name of this {@link Constant}.
30 */
31 String name();
32 }