View Javadoc
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    *   http://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  }