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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.hc.core5.http2.frame;
29  
30  import java.nio.ByteBuffer;
31  
32  import org.apache.hc.core5.util.Args;
33  
34  /**
35   * Default {@link FrameFactory} implementation.
36   *
37   * @since 5.0
38   */
39  public class DefaultFrameFactory extends FrameFactory {
40  
41      public static final FrameFactory INSTANCE = new DefaultFrameFactory();
42  
43      @Override
44      public RawFrame createHeaders(final int streamId, final ByteBuffer payload, final boolean endHeaders, final boolean endStream) {
45          Args.positive(streamId, "Stream id");
46          final int flags = (endHeaders ? FrameFlag.END_HEADERS.value : 0) | (endStream ? FrameFlag.END_STREAM.value : 0);
47          return new RawFrame(FrameType.HEADERS.getValue(), flags, streamId, payload);
48      }
49  
50      @Override
51      public RawFrame createContinuation(final int streamId, final ByteBuffer payload, final boolean endHeaders) {
52          Args.positive(streamId, "Stream id");
53          final int flags = (endHeaders ? FrameFlag.END_HEADERS.value : 0);
54          return new RawFrame(FrameType.CONTINUATION.getValue(), flags, streamId, payload);
55      }
56  
57      @Override
58      public RawFrame createPushPromise(final int streamId, final ByteBuffer payload, final boolean endHeaders) {
59          Args.positive(streamId, "Stream id");
60          final int flags = (endHeaders ? FrameFlag.END_HEADERS.value : 0);
61          return new RawFrame(FrameType.PUSH_PROMISE.getValue(), flags, streamId, payload);
62      }
63  
64      @Override
65      public RawFrame createData(final int streamId, final ByteBuffer payload, final boolean endStream) {
66          Args.positive(streamId, "Stream id");
67          final int flags = (endStream ? FrameFlag.END_STREAM.value : 0);
68          return new RawFrame(FrameType.DATA.getValue(), flags, streamId, payload);
69      }
70  
71  }