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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * software distributed under the License is distributed on an<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * KIND, either express or implied. See the License for the<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * specific language governing permissions and limitations<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> *<a name="line.18"></a> |
| <span class="sourceLineNo">019</span> */<a name="line.19"></a> |
| <span class="sourceLineNo">020</span>package org.apache.mina.filter.codec.demux;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.apache.mina.core.buffer.IoBuffer;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.mina.core.session.AttributeKey;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.mina.core.session.IoSession;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.mina.filter.codec.CumulativeProtocolDecoder;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.mina.filter.codec.ProtocolDecoder;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.mina.filter.codec.ProtocolDecoderException;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.mina.filter.codec.ProtocolDecoderOutput;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span><a name="line.29"></a> |
| <span class="sourceLineNo">030</span>/**<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * A composite {@link ProtocolDecoder} that demultiplexes incoming {@link IoBuffer}<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> * decoding requests into an appropriate {@link MessageDecoder}.<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> * <a name="line.33"></a> |
| <span class="sourceLineNo">034</span> * <h2>Internal mechanism of {@link MessageDecoder} selection</h2><a name="line.34"></a> |
| <span class="sourceLineNo">035</span> * <p><a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * <ol><a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * <li>{@link DemuxingProtocolDecoder} iterates the list of candidate<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> * {@link MessageDecoder}s and calls {@link MessageDecoder#decodable(IoSession, IoBuffer)}.<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> * Initially, all registered {@link MessageDecoder}s are candidates.</li><a name="line.39"></a> |
| <span class="sourceLineNo">040</span> * <li>If {@link MessageDecoderResult#NOT_OK} is returned, it is removed from the candidate<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * list.</li><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * <li>If {@link MessageDecoderResult#NEED_DATA} is returned, it is retained in the candidate<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * list, and its {@link MessageDecoder#decodable(IoSession, IoBuffer)} will be invoked<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * again when more data is received.</li><a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * <li>If {@link MessageDecoderResult#OK} is returned, {@link DemuxingProtocolDecoder}<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * found the right {@link MessageDecoder}.</li><a name="line.46"></a> |
| <span class="sourceLineNo">047</span> * <li>If there's no candidate left, an exception is raised. Otherwise, <a name="line.47"></a> |
| <span class="sourceLineNo">048</span> * {@link DemuxingProtocolDecoder} will keep iterating the candidate list.<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> * </ol><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * <a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * Please note that any change of position and limit of the specified {@link IoBuffer}<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> * in {@link MessageDecoder#decodable(IoSession, IoBuffer)} will be reverted back to its<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * original value.<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * <p><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * Once a {@link MessageDecoder} is selected, {@link DemuxingProtocolDecoder} calls<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * {@link MessageDecoder#decode(IoSession, IoBuffer, ProtocolDecoderOutput)} continuously<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> * reading its return value:<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> * <ul><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> * <li>{@link MessageDecoderResult#NOT_OK} - protocol violation; {@link ProtocolDecoderException}<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> * is raised automatically.</li><a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * <li>{@link MessageDecoderResult#NEED_DATA} - needs more data to read the whole message;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> * {@link MessageDecoder#decode(IoSession, IoBuffer, ProtocolDecoderOutput)}<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> * will be invoked again when more data is received.</li><a name="line.63"></a> |
| <span class="sourceLineNo">064</span> * <li>{@link MessageDecoderResult#OK} - successfully decoded a message; the candidate list will<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> * be reset and the selection process will start over.</li><a name="line.65"></a> |
| <span class="sourceLineNo">066</span> * </ul><a name="line.66"></a> |
| <span class="sourceLineNo">067</span> *<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> * @author <a href="http://mina.apache.org">Apache MINA Project</a><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> *<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * @see MessageDecoderFactory<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * @see MessageDecoder<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> */<a name="line.72"></a> |
| <span class="sourceLineNo">073</span>public class DemuxingProtocolDecoder extends CumulativeProtocolDecoder {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span><a name="line.74"></a> |
| <span class="sourceLineNo">075</span> private final AttributeKey STATE = new AttributeKey(getClass(), "state");<a name="line.75"></a> |
| <span class="sourceLineNo">076</span><a name="line.76"></a> |
| <span class="sourceLineNo">077</span> private MessageDecoderFactory[] decoderFactories = new MessageDecoderFactory[0];<a name="line.77"></a> |
| <span class="sourceLineNo">078</span><a name="line.78"></a> |
| <span class="sourceLineNo">079</span> private static final Class<?>[] EMPTY_PARAMS = new Class[0];<a name="line.79"></a> |
| <span class="sourceLineNo">080</span><a name="line.80"></a> |
| <span class="sourceLineNo">081</span> public DemuxingProtocolDecoder() {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> // Do nothing<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> }<a name="line.83"></a> |
| <span class="sourceLineNo">084</span><a name="line.84"></a> |
| <span class="sourceLineNo">085</span> public void addMessageDecoder(Class<? extends MessageDecoder> decoderClass) {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> if (decoderClass == null) {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> throw new IllegalArgumentException("decoderClass");<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> }<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> try {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> decoderClass.getConstructor(EMPTY_PARAMS);<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> } catch (NoSuchMethodException e) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> throw new IllegalArgumentException("The specified class doesn't have a public default constructor.");<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> }<a name="line.94"></a> |
| <span class="sourceLineNo">095</span><a name="line.95"></a> |
| <span class="sourceLineNo">096</span> boolean registered = false;<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> if (MessageDecoder.class.isAssignableFrom(decoderClass)) {<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> addMessageDecoder(new DefaultConstructorMessageDecoderFactory(decoderClass));<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> registered = true;<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> }<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> if (!registered) {<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> throw new IllegalArgumentException("Unregisterable type: " + decoderClass);<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> }<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> }<a name="line.105"></a> |
| <span class="sourceLineNo">106</span><a name="line.106"></a> |
| <span class="sourceLineNo">107</span> public void addMessageDecoder(MessageDecoder decoder) {<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> addMessageDecoder(new SingletonMessageDecoderFactory(decoder));<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> }<a name="line.109"></a> |
| <span class="sourceLineNo">110</span><a name="line.110"></a> |
| <span class="sourceLineNo">111</span> public void addMessageDecoder(MessageDecoderFactory factory) {<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> if (factory == null) {<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> throw new IllegalArgumentException("factory");<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> }<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> MessageDecoderFactory[] decoderFactories = this.decoderFactories;<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> MessageDecoderFactory[] newDecoderFactories = new MessageDecoderFactory[decoderFactories.length + 1];<a name="line.116"></a> |
| <span class="sourceLineNo">117</span> System.arraycopy(decoderFactories, 0, newDecoderFactories, 0, decoderFactories.length);<a name="line.117"></a> |
| <span class="sourceLineNo">118</span> newDecoderFactories[decoderFactories.length] = factory;<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> this.decoderFactories = newDecoderFactories;<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> }<a name="line.120"></a> |
| <span class="sourceLineNo">121</span><a name="line.121"></a> |
| <span class="sourceLineNo">122</span> /**<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> * {@inheritDoc}<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> */<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> @Override<a name="line.125"></a> |
| <span class="sourceLineNo">126</span> protected boolean doDecode(IoSession session, IoBuffer in, ProtocolDecoderOutput out) throws Exception {<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> State state = getState(session);<a name="line.127"></a> |
| <span class="sourceLineNo">128</span><a name="line.128"></a> |
| <span class="sourceLineNo">129</span> if (state.currentDecoder == null) {<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> MessageDecoder[] decoders = state.decoders;<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> int undecodables = 0;<a name="line.131"></a> |
| <span class="sourceLineNo">132</span><a name="line.132"></a> |
| <span class="sourceLineNo">133</span> for (int i = decoders.length - 1; i >= 0; i--) {<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> MessageDecoder decoder = decoders[i];<a name="line.134"></a> |
| <span class="sourceLineNo">135</span> int limit = in.limit();<a name="line.135"></a> |
| <span class="sourceLineNo">136</span> int pos = in.position();<a name="line.136"></a> |
| <span class="sourceLineNo">137</span><a name="line.137"></a> |
| <span class="sourceLineNo">138</span> MessageDecoderResult result;<a name="line.138"></a> |
| <span class="sourceLineNo">139</span><a name="line.139"></a> |
| <span class="sourceLineNo">140</span> try {<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> result = decoder.decodable(session, in);<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> } finally {<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> in.position(pos);<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> in.limit(limit);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> }<a name="line.145"></a> |
| <span class="sourceLineNo">146</span><a name="line.146"></a> |
| <span class="sourceLineNo">147</span> if (result == MessageDecoder.OK) {<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> state.currentDecoder = decoder;<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> break;<a name="line.149"></a> |
| <span class="sourceLineNo">150</span> } else if (result == MessageDecoder.NOT_OK) {<a name="line.150"></a> |
| <span class="sourceLineNo">151</span> undecodables++;<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> } else if (result != MessageDecoder.NEED_DATA) {<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> throw new IllegalStateException("Unexpected decode result (see your decodable()): " + result);<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> }<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> }<a name="line.155"></a> |
| <span class="sourceLineNo">156</span><a name="line.156"></a> |
| <span class="sourceLineNo">157</span> if (undecodables == decoders.length) {<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> // Throw an exception if all decoders cannot decode data.<a name="line.158"></a> |
| <span class="sourceLineNo">159</span> String dump = in.getHexDump();<a name="line.159"></a> |
| <span class="sourceLineNo">160</span> in.position(in.limit()); // Skip data<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> ProtocolDecoderException e = new ProtocolDecoderException("No appropriate message decoder: " + dump);<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> e.setHexdump(dump);<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> throw e;<a name="line.163"></a> |
| <span class="sourceLineNo">164</span> }<a name="line.164"></a> |
| <span class="sourceLineNo">165</span><a name="line.165"></a> |
| <span class="sourceLineNo">166</span> if (state.currentDecoder == null) {<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> // Decoder is not determined yet (i.e. we need more data)<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> return false;<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> }<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> }<a name="line.170"></a> |
| <span class="sourceLineNo">171</span><a name="line.171"></a> |
| <span class="sourceLineNo">172</span> try {<a name="line.172"></a> |
| <span class="sourceLineNo">173</span> MessageDecoderResult result = state.currentDecoder.decode(session, in, out);<a name="line.173"></a> |
| <span class="sourceLineNo">174</span> if (result == MessageDecoder.OK) {<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> state.currentDecoder = null;<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> return true;<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> } else if (result == MessageDecoder.NEED_DATA) {<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> return false;<a name="line.178"></a> |
| <span class="sourceLineNo">179</span> } else if (result == MessageDecoder.NOT_OK) {<a name="line.179"></a> |
| <span class="sourceLineNo">180</span> state.currentDecoder = null;<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> throw new ProtocolDecoderException("Message decoder returned NOT_OK.");<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> } else {<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> state.currentDecoder = null;<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> throw new IllegalStateException("Unexpected decode result (see your decode()): " + result);<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> }<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> } catch (Exception e) {<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> state.currentDecoder = null;<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> throw e;<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> }<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> }<a name="line.190"></a> |
| <span class="sourceLineNo">191</span><a name="line.191"></a> |
| <span class="sourceLineNo">192</span> /**<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> * {@inheritDoc}<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> */<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> @Override<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> public void finishDecode(IoSession session, ProtocolDecoderOutput out) throws Exception {<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> super.finishDecode(session, out);<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> State state = getState(session);<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> MessageDecoder currentDecoder = state.currentDecoder;<a name="line.199"></a> |
| <span class="sourceLineNo">200</span> if (currentDecoder == null) {<a name="line.200"></a> |
| <span class="sourceLineNo">201</span> return;<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> }<a name="line.202"></a> |
| <span class="sourceLineNo">203</span><a name="line.203"></a> |
| <span class="sourceLineNo">204</span> currentDecoder.finishDecode(session, out);<a name="line.204"></a> |
| <span class="sourceLineNo">205</span> }<a name="line.205"></a> |
| <span class="sourceLineNo">206</span><a name="line.206"></a> |
| <span class="sourceLineNo">207</span> /**<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> * {@inheritDoc}<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> */<a name="line.209"></a> |
| <span class="sourceLineNo">210</span> @Override<a name="line.210"></a> |
| <span class="sourceLineNo">211</span> public void dispose(IoSession session) throws Exception {<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> super.dispose(session);<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> session.removeAttribute(STATE);<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> }<a name="line.214"></a> |
| <span class="sourceLineNo">215</span><a name="line.215"></a> |
| <span class="sourceLineNo">216</span> private State getState(IoSession session) throws Exception {<a name="line.216"></a> |
| <span class="sourceLineNo">217</span> State state = (State) session.getAttribute(STATE);<a name="line.217"></a> |
| <span class="sourceLineNo">218</span><a name="line.218"></a> |
| <span class="sourceLineNo">219</span> if (state == null) {<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> state = new State();<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> State oldState = (State) session.setAttributeIfAbsent(STATE, state);<a name="line.221"></a> |
| <span class="sourceLineNo">222</span><a name="line.222"></a> |
| <span class="sourceLineNo">223</span> if (oldState != null) {<a name="line.223"></a> |
| <span class="sourceLineNo">224</span> state = oldState;<a name="line.224"></a> |
| <span class="sourceLineNo">225</span> }<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> }<a name="line.226"></a> |
| <span class="sourceLineNo">227</span><a name="line.227"></a> |
| <span class="sourceLineNo">228</span> return state;<a name="line.228"></a> |
| <span class="sourceLineNo">229</span> }<a name="line.229"></a> |
| <span class="sourceLineNo">230</span><a name="line.230"></a> |
| <span class="sourceLineNo">231</span> private class State {<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> private final MessageDecoder[] decoders;<a name="line.232"></a> |
| <span class="sourceLineNo">233</span><a name="line.233"></a> |
| <span class="sourceLineNo">234</span> private MessageDecoder currentDecoder;<a name="line.234"></a> |
| <span class="sourceLineNo">235</span><a name="line.235"></a> |
| <span class="sourceLineNo">236</span> private State() throws Exception {<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> MessageDecoderFactory[] decoderFactories = DemuxingProtocolDecoder.this.decoderFactories;<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> decoders = new MessageDecoder[decoderFactories.length];<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> for (int i = decoderFactories.length - 1; i >= 0; i--) {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> decoders[i] = decoderFactories[i].getDecoder();<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> }<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> }<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> }<a name="line.243"></a> |
| <span class="sourceLineNo">244</span><a name="line.244"></a> |
| <span class="sourceLineNo">245</span> private static class SingletonMessageDecoderFactory implements MessageDecoderFactory {<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> private final MessageDecoder decoder;<a name="line.246"></a> |
| <span class="sourceLineNo">247</span><a name="line.247"></a> |
| <span class="sourceLineNo">248</span> private SingletonMessageDecoderFactory(MessageDecoder decoder) {<a name="line.248"></a> |
| <span class="sourceLineNo">249</span> if (decoder == null) {<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> throw new IllegalArgumentException("decoder");<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> }<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> this.decoder = decoder;<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> }<a name="line.253"></a> |
| <span class="sourceLineNo">254</span><a name="line.254"></a> |
| <span class="sourceLineNo">255</span> public MessageDecoder getDecoder() {<a name="line.255"></a> |
| <span class="sourceLineNo">256</span> return decoder;<a name="line.256"></a> |
| <span class="sourceLineNo">257</span> }<a name="line.257"></a> |
| <span class="sourceLineNo">258</span> }<a name="line.258"></a> |
| <span class="sourceLineNo">259</span><a name="line.259"></a> |
| <span class="sourceLineNo">260</span> private static class DefaultConstructorMessageDecoderFactory implements MessageDecoderFactory {<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> private final Class<?> decoderClass;<a name="line.261"></a> |
| <span class="sourceLineNo">262</span><a name="line.262"></a> |
| <span class="sourceLineNo">263</span> private DefaultConstructorMessageDecoderFactory(Class<?> decoderClass) {<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> if (decoderClass == null) {<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> throw new IllegalArgumentException("decoderClass");<a name="line.265"></a> |
| <span class="sourceLineNo">266</span> }<a name="line.266"></a> |
| <span class="sourceLineNo">267</span><a name="line.267"></a> |
| <span class="sourceLineNo">268</span> if (!MessageDecoder.class.isAssignableFrom(decoderClass)) {<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> throw new IllegalArgumentException("decoderClass is not assignable to MessageDecoder");<a name="line.269"></a> |
| <span class="sourceLineNo">270</span> }<a name="line.270"></a> |
| <span class="sourceLineNo">271</span> this.decoderClass = decoderClass;<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> }<a name="line.272"></a> |
| <span class="sourceLineNo">273</span><a name="line.273"></a> |
| <span class="sourceLineNo">274</span> public MessageDecoder getDecoder() throws Exception {<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> return (MessageDecoder) decoderClass.newInstance();<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> }<a name="line.276"></a> |
| <span class="sourceLineNo">277</span> }<a name="line.277"></a> |
| <span class="sourceLineNo">278</span>}<a name="line.278"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
