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 * 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.handler.codec.spdy;
17
18 import io.netty.buffer.ByteBuf;
19 import io.netty.buffer.ByteBufAllocator;
20 import io.netty.util.internal.PlatformDependent;
21
22 /**
23 * Super-class for SPDY header-block encoders.
24 *
25 * @see SpdyHeaderBlockZlibEncoder
26 * @see SpdyHeaderBlockJZlibEncoder
27 * @see SpdyHeaderBlockRawEncoder
28 */
29 public abstract class SpdyHeaderBlockEncoder {
30
31 static SpdyHeaderBlockEncoder newInstance(
32 SpdyVersion version, int compressionLevel, int windowBits, int memLevel) {
33
34 if (PlatformDependent.javaVersion() >= 7) {
35 return new SpdyHeaderBlockZlibEncoder(
36 version, compressionLevel);
37 } else {
38 return new SpdyHeaderBlockJZlibEncoder(
39 version, compressionLevel, windowBits, memLevel);
40 }
41 }
42
43 abstract ByteBuf encode(ByteBufAllocator alloc, SpdyHeadersFrame frame) throws Exception;
44 abstract void end();
45 }