demuxingprotocolencoder.html

MINA+API 关于MINA的API

<a name="137" href="#137">137</a>                     <span class="jxr_string">"No message encoder found for message: "</span> + message);
<a name="138" href="#138">138</a>         }
<a name="139" href="#139">139</a>     }
<a name="140" href="#140">140</a> 
<a name="141" href="#141">141</a>     <strong class="jxr_keyword">protected</strong> MessageEncoder&lt;Object&gt; findEncoder(<a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolDecoder.html">State</a> state, Class&lt;?&gt; type) {
<a name="142" href="#142">142</a>         <strong class="jxr_keyword">return</strong> findEncoder(state, type, <strong class="jxr_keyword">null</strong>);
<a name="143" href="#143">143</a>     }
<a name="144" href="#144">144</a> 
<a name="145" href="#145">145</a>     @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="146" href="#146">146</a>     <strong class="jxr_keyword">private</strong> MessageEncoder&lt;Object&gt; findEncoder(
<a name="147" href="#147">147</a>             <a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolDecoder.html">State</a> state, Class type, Set&lt;Class&gt; triedClasses) {
<a name="148" href="#148">148</a>         <a href="../../../../../../org/apache/mina/filter/codec/demux/MessageEncoder.html">MessageEncoder</a> encoder = <strong class="jxr_keyword">null</strong>;
<a name="149" href="#149">149</a> 
<a name="150" href="#150">150</a>         <strong class="jxr_keyword">if</strong> (triedClasses != <strong class="jxr_keyword">null</strong> &amp;&amp; triedClasses.contains(type)) {
<a name="151" href="#151">151</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">null</strong>;
<a name="152" href="#152">152</a>         }
<a name="153" href="#153">153</a> 
<a name="154" href="#154">154</a>         <em class="jxr_comment">/*</em>
<a name="155" href="#155">155</a> <em class="jxr_comment">         * Try the cache first.</em>
<a name="156" href="#156">156</a> <em class="jxr_comment">         */</em>
<a name="157" href="#157">157</a>         encoder = state.findEncoderCache.get(type);
<a name="158" href="#158">158</a>         <strong class="jxr_keyword">if</strong> (encoder != <strong class="jxr_keyword">null</strong>) {
<a name="159" href="#159">159</a>             <strong class="jxr_keyword">return</strong> encoder;
<a name="160" href="#160">160</a>         }
<a name="161" href="#161">161</a> 
<a name="162" href="#162">162</a>         <em class="jxr_comment">/*</em>
<a name="163" href="#163">163</a> <em class="jxr_comment">         * Try the registered encoders for an immediate match.</em>
<a name="164" href="#164">164</a> <em class="jxr_comment">         */</em>
<a name="165" href="#165">165</a>         encoder = state.type2encoder.get(type);
<a name="166" href="#166">166</a> 
<a name="167" href="#167">167</a>         <strong class="jxr_keyword">if</strong> (encoder == <strong class="jxr_keyword">null</strong>) {
<a name="168" href="#168">168</a>             <em class="jxr_comment">/*</em>
<a name="169" href="#169">169</a> <em class="jxr_comment">             * No immediate match could be found. Search the type's interfaces.</em>
<a name="170" href="#170">170</a> <em class="jxr_comment">             */</em>
<a name="171" href="#171">171</a> 
<a name="172" href="#172">172</a>             <strong class="jxr_keyword">if</strong> (triedClasses == <strong class="jxr_keyword">null</strong>) {
<a name="173" href="#173">173</a>                 triedClasses = <strong class="jxr_keyword">new</strong> IdentityHashSet&lt;Class&gt;();
<a name="174" href="#174">174</a>             }
<a name="175" href="#175">175</a>             triedClasses.add(type);
<a name="176" href="#176">176</a> 
<a name="177" href="#177">177</a>             Class[] interfaces = type.getInterfaces();
<a name="178" href="#178">178</a>             <strong class="jxr_keyword">for</strong> (Class element : interfaces) {
<a name="179" href="#179">179</a>                 encoder = findEncoder(state, element, triedClasses);
<a name="180" href="#180">180</a>                 <strong class="jxr_keyword">if</strong> (encoder != <strong class="jxr_keyword">null</strong>) {
<a name="181" href="#181">181</a>                     <strong class="jxr_keyword">break</strong>;
<a name="182" href="#182">182</a>                 }
<a name="183" href="#183">183</a>             }
<a name="184" href="#184">184</a>         }
<a name="185" href="#185">185</a> 
<a name="186" href="#186">186</a>         <strong class="jxr_keyword">if</strong> (encoder == <strong class="jxr_keyword">null</strong>) {
<a name="187" href="#187">187</a>             <em class="jxr_comment">/*</em>
<a name="188" href="#188">188</a> <em class="jxr_comment">             * No match in type's interfaces could be found. Search the</em>
<a name="189" href="#189">189</a> <em class="jxr_comment">             * superclass.</em>
<a name="190" href="#190">190</a> <em class="jxr_comment">             */</em>
<a name="191" href="#191">191</a> 
<a name="192" href="#192">192</a>             Class superclass = type.getSuperclass();
<a name="193" href="#193">193</a>             <strong class="jxr_keyword">if</strong> (superclass != <strong class="jxr_keyword">null</strong>) {
<a name="194" href="#194">194</a>                 encoder = findEncoder(state, superclass);
<a name="195" href="#195">195</a>             }
<a name="196" href="#196">196</a>         }
<a name="197" href="#197">197</a> 
<a name="198" href="#198">198</a>         <em class="jxr_comment">/*</em>
<a name="199" href="#199">199</a> <em class="jxr_comment">         * Make sure the encoder is added to the cache. By updating the cache</em>
<a name="200" href="#200">200</a> <em class="jxr_comment">         * here all the types (superclasses and interfaces) in the path which</em>
<a name="201" href="#201">201</a> <em class="jxr_comment">         * led to a match will be cached along with the immediate message type.</em>
<a name="202" href="#202">202</a> <em class="jxr_comment">         */</em>
<a name="203" href="#203">203</a>         <strong class="jxr_keyword">if</strong> (encoder != <strong class="jxr_keyword">null</strong>) {
<a name="204" href="#204">204</a>             state.findEncoderCache.put(type, encoder);
<a name="205" href="#205">205</a>         }
<a name="206" href="#206">206</a> 
<a name="207" href="#207">207</a>         <strong class="jxr_keyword">return</strong> encoder;
<a name="208" href="#208">208</a>     }
<a name="209" href="#209">209</a> 
<a name="210" href="#210">210</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> dispose(<a href="../../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) <strong class="jxr_keyword">throws</strong> Exception {
<a name="211" href="#211">211</a>         session.removeAttribute(STATE);
<a name="212" href="#212">212</a>     }
<a name="213" href="#213">213</a>     
<a name="214" href="#214">214</a>     <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolDecoder.html">State</a> getState(<a href="../../../../../../org/apache/mina/common/IoSession.html">IoSession</a> session) <strong class="jxr_keyword">throws</strong> Exception {
<a name="215" href="#215">215</a>         <a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolDecoder.html">State</a> state = (State) session.getAttribute(STATE);
<a name="216" href="#216">216</a>         <strong class="jxr_keyword">if</strong> (state == <strong class="jxr_keyword">null</strong>) {
<a name="217" href="#217">217</a>             state = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolDecoder.html">State</a>();
<a name="218" href="#218">218</a>             <a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolDecoder.html">State</a> oldState = (State) session.setAttributeIfAbsent(STATE, state);
<a name="219" href="#219">219</a>             <strong class="jxr_keyword">if</strong> (oldState != <strong class="jxr_keyword">null</strong>) {
<a name="220" href="#220">220</a>                 state = oldState;
<a name="221" href="#221">221</a>             }
<a name="222" href="#222">222</a>         }
<a name="223" href="#223">223</a>         <strong class="jxr_keyword">return</strong> state;
<a name="224" href="#224">224</a>     }
<a name="225" href="#225">225</a>     
<a name="226" href="#226">226</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolDecoder.html">State</a> {
<a name="227" href="#227">227</a>         @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="228" href="#228">228</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Map&lt;Class&lt;?&gt;, MessageEncoder&gt; findEncoderCache = <strong class="jxr_keyword">new</strong> HashMap&lt;Class&lt;?&gt;, MessageEncoder&gt;();
<a name="229" href="#229">229</a> 
<a name="230" href="#230">230</a>         @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="231" href="#231">231</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Map&lt;Class&lt;?&gt;, MessageEncoder&gt; type2encoder = <strong class="jxr_keyword">new</strong> HashMap&lt;Class&lt;?&gt;, MessageEncoder&gt;();
<a name="232" href="#232">232</a>         
<a name="233" href="#233">233</a>         @SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a name="234" href="#234">234</a>         <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolDecoder.html">State</a>() <strong class="jxr_keyword">throws</strong> Exception {
<a name="235" href="#235">235</a>             <strong class="jxr_keyword">for</strong> (Map.Entry&lt;Class&lt;?&gt;, MessageEncoderFactory&gt; e: type2encoderFactory.entrySet()) {
<a name="236" href="#236">236</a>                 type2encoder.put(e.getKey(), e.getValue().getEncoder());
<a name="237" href="#237">237</a>             }
<a name="238" href="#238">238</a>         }
<a name="239" href="#239">239</a>     }
<a name="240" href="#240">240</a> 
<a name="241" href="#241">241</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> SingletonMessageEncoderFactory&lt;T&gt; implements
<a name="242" href="#242">242</a>             MessageEncoderFactory&lt;T&gt; {
<a name="243" href="#243">243</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> MessageEncoder&lt;T&gt; encoder;
<a name="244" href="#244">244</a> 
<a name="245" href="#245">245</a>         <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolEncoder.html">SingletonMessageEncoderFactory</a>(MessageEncoder&lt;T&gt; encoder) {
<a name="246" href="#246">246</a>             <strong class="jxr_keyword">if</strong> (encoder == <strong class="jxr_keyword">null</strong>) {
<a name="247" href="#247">247</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"encoder"</span>);
<a name="248" href="#248">248</a>             }
<a name="249" href="#249">249</a>             <strong class="jxr_keyword">this</strong>.encoder = encoder;
<a name="250" href="#250">250</a>         }
<a name="251" href="#251">251</a> 
<a name="252" href="#252">252</a>         <strong class="jxr_keyword">public</strong> MessageEncoder&lt;T&gt; getEncoder() {
<a name="253" href="#253">253</a>             <strong class="jxr_keyword">return</strong> encoder;
<a name="254" href="#254">254</a>         }
<a name="255" href="#255">255</a>     }
<a name="256" href="#256">256</a> 
<a name="257" href="#257">257</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">class</strong> DefaultConstructorMessageEncoderFactory&lt;T&gt; implements
<a name="258" href="#258">258</a>             MessageEncoderFactory&lt;T&gt; {
<a name="259" href="#259">259</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Class&lt;MessageEncoder&lt;T&gt;&gt; encoderClass;
<a name="260" href="#260">260</a> 
<a name="261" href="#261">261</a>         <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/mina/filter/codec/demux/DemuxingProtocolEncoder.html">DefaultConstructorMessageEncoderFactory</a>(Class&lt;MessageEncoder&lt;T&gt;&gt; encoderClass) {
<a name="262" href="#262">262</a>             <strong class="jxr_keyword">if</strong> (encoderClass == <strong class="jxr_keyword">null</strong>) {
<a name="263" href="#263">263</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"encoderClass"</span>);
<a name="264" href="#264">264</a>             }
<a name="265" href="#265">265</a> 
<a name="266" href="#266">266</a>             <strong class="jxr_keyword">if</strong> (!MessageEncoder.<strong class="jxr_keyword">class</strong>.isAssignableFrom(encoderClass)) {
<a name="267" href="#267">267</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a name="268" href="#268">268</a>                         <span class="jxr_string">"encoderClass is not assignable to MessageEncoder"</span>);
<a name="269" href="#269">269</a>             }
<a name="270" href="#270">270</a>             <strong class="jxr_keyword">this</strong>.encoderClass = encoderClass;
<a name="271" href="#271">271</a>         }
<a name="272" href="#272">272</a> 
<a name="273" href="#273">273</a>         <strong class="jxr_keyword">public</strong> MessageEncoder&lt;T&gt; getEncoder() <strong class="jxr_keyword">throws</strong> Exception {
<a name="274" href="#274">274</a>             <strong class="jxr_keyword">return</strong> encoderClass.newInstance();
<a name="275" href="#275">275</a>         }
<a name="276" href="#276">276</a>     }
<a name="277" href="#277">277</a> }
</pre>
<hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
</html>