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    *   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.netty5.handler.codec;
17  
18  import static java.util.Objects.requireNonNull;
19  
20  public class DecoderResult {
21  
22      private static final DecoderResult SUCCESS = new DecoderResult();
23  
24      public static DecoderResult failure(Throwable cause) {
25          requireNonNull(cause, "cause");
26          return new DecoderResult(cause);
27      }
28  
29      public static DecoderResult success() {
30          return SUCCESS;
31      }
32  
33      private final Throwable cause;
34  
35      protected DecoderResult(Throwable cause) {
36          this.cause = requireNonNull(cause, "cause");
37      }
38  
39      protected DecoderResult() {
40          this.cause = null;
41      }
42  
43      public final boolean isSuccess() {
44          return cause == null;
45      }
46  
47      public final boolean isFailure() {
48          return cause != null;
49      }
50  
51      public final Throwable cause() {
52          return cause;
53      }
54  
55      @Override
56      public String toString() {
57          if (isSuccess()) {
58              return "success";
59          }
60  
61          String cause = cause().toString();
62          return new StringBuilder(cause.length() + 17)
63                  .append("failure(")
64                  .append(cause)
65                  .append(')')
66                  .toString();
67      }
68  }