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 org.jboss.netty.handler.codec.spdy;
17
18 import org.jboss.netty.buffer.ChannelBuffer;
19 import org.jboss.netty.util.internal.DetectionUtil;
20
21 abstract class SpdyHeaderBlockEncoder {
22
23 static SpdyHeaderBlockEncoder newInstance(
24 SpdyVersion spdyVersion, int compressionLevel, int windowBits, int memLevel) {
25
26 if (DetectionUtil.javaVersion() >= 7) {
27 return new SpdyHeaderBlockZlibEncoder(
28 spdyVersion, compressionLevel);
29 } else {
30 return new SpdyHeaderBlockJZlibEncoder(
31 spdyVersion, compressionLevel, windowBits, memLevel);
32 }
33 }
34
35 abstract ChannelBuffer encode(SpdyHeadersFrame frame) throws Exception;
36 abstract void end();
37 }