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1   /*
2    * Copyright 2013 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.handler.codec.spdy;
17  
18  import io.netty.util.internal.StringUtil;
19  
20  /**
21   * The default {@link SpdyWindowUpdateFrame} implementation.
22   */
23  public class DefaultSpdyWindowUpdateFrame implements SpdyWindowUpdateFrame {
24  
25      private int streamId;
26      private int deltaWindowSize;
27  
28      /**
29       * Creates a new instance.
30       *
31       * @param streamId        the Stream-ID of this frame
32       * @param deltaWindowSize the Delta-Window-Size of this frame
33       */
34      public DefaultSpdyWindowUpdateFrame(int streamId, int deltaWindowSize) {
35          setStreamId(streamId);
36          setDeltaWindowSize(deltaWindowSize);
37      }
38  
39      @Override
40      public int streamId() {
41          return streamId;
42      }
43  
44      @Override
45      public SpdyWindowUpdateFrame setStreamId(int streamId) {
46          if (streamId < 0) {
47              throw new IllegalArgumentException(
48                      "Stream-ID cannot be negative: " + streamId);
49          }
50          this.streamId = streamId;
51          return this;
52      }
53  
54      @Override
55      public int deltaWindowSize() {
56          return deltaWindowSize;
57      }
58  
59      @Override
60      public SpdyWindowUpdateFrame setDeltaWindowSize(int deltaWindowSize) {
61          if (deltaWindowSize <= 0) {
62              throw new IllegalArgumentException(
63                      "Delta-Window-Size must be positive: " +
64                      deltaWindowSize);
65          }
66          this.deltaWindowSize = deltaWindowSize;
67          return this;
68      }
69  
70      @Override
71      public String toString() {
72          return new StringBuilder()
73              .append(StringUtil.simpleClassName(this))
74              .append(StringUtil.NEWLINE)
75              .append("--> Stream-ID = ")
76              .append(streamId())
77              .append(StringUtil.NEWLINE)
78              .append("--> Delta-Window-Size = ")
79              .append(deltaWindowSize())
80              .toString();
81      }
82  }