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MINA+API 关于MINA的API

<a name="235" href="#235">235</a>         <em class="jxr_comment">// Convert delimiter to ByteBuffer if not done yet.</em>
<a name="236" href="#236">236</a>         <strong class="jxr_keyword">if</strong> (delimBuf == <strong class="jxr_keyword">null</strong>) {
<a name="237" href="#237">237</a>             <a href="../../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> tmp = IoBuffer.allocate(2).setAutoExpand(<strong class="jxr_keyword">true</strong>);
<a name="238" href="#238">238</a>             tmp.putString(delimiter.getValue(), charset.newEncoder());
<a name="239" href="#239">239</a>             tmp.flip();
<a name="240" href="#240">240</a>             delimBuf = tmp;
<a name="241" href="#241">241</a>         }
<a name="242" href="#242">242</a> 
<a name="243" href="#243">243</a>         <em class="jxr_comment">// Try to find a match</em>
<a name="244" href="#244">244</a>         <strong class="jxr_keyword">int</strong> oldPos = in.position();
<a name="245" href="#245">245</a>         <strong class="jxr_keyword">int</strong> oldLimit = in.limit();
<a name="246" href="#246">246</a>         <strong class="jxr_keyword">while</strong> (in.hasRemaining()) {
<a name="247" href="#247">247</a>             byte b = in.get();
<a name="248" href="#248">248</a>             <strong class="jxr_keyword">if</strong> (delimBuf.get(matchCount) == b) {
<a name="249" href="#249">249</a>                 matchCount++;
<a name="250" href="#250">250</a>                 <strong class="jxr_keyword">if</strong> (matchCount == delimBuf.limit()) {
<a name="251" href="#251">251</a>                     <em class="jxr_comment">// Found a match.</em>
<a name="252" href="#252">252</a>                     <strong class="jxr_keyword">int</strong> pos = in.position();
<a name="253" href="#253">253</a>                     in.limit(pos);
<a name="254" href="#254">254</a>                     in.position(oldPos);
<a name="255" href="#255">255</a> 
<a name="256" href="#256">256</a>                     ctx.append(in);
<a name="257" href="#257">257</a> 
<a name="258" href="#258">258</a>                     in.limit(oldLimit);
<a name="259" href="#259">259</a>                     in.position(pos);
<a name="260" href="#260">260</a>                     <strong class="jxr_keyword">if</strong> (ctx.getOverflowPosition() == 0) {
<a name="261" href="#261">261</a>                         <a href="../../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> buf = ctx.getBuffer();
<a name="262" href="#262">262</a>                         buf.flip();
<a name="263" href="#263">263</a>                         buf.limit(buf.limit() - matchCount);
<a name="264" href="#264">264</a>                         <strong class="jxr_keyword">try</strong> {
<a name="265" href="#265">265</a>                             out.write(buf.getString(ctx.getDecoder()));
<a name="266" href="#266">266</a>                         } <strong class="jxr_keyword">finally</strong> {
<a name="267" href="#267">267</a>                             buf.clear();
<a name="268" href="#268">268</a>                         }
<a name="269" href="#269">269</a>                     } <strong class="jxr_keyword">else</strong> {
<a name="270" href="#270">270</a>                         <strong class="jxr_keyword">int</strong> overflowPosition = ctx.getOverflowPosition();
<a name="271" href="#271">271</a>                         ctx.reset();
<a name="272" href="#272">272</a>                         <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/mina/filter/codec/RecoverableProtocolDecoderException.html">RecoverableProtocolDecoderException</a>(
<a name="273" href="#273">273</a>                                 <span class="jxr_string">"Line is too long: "</span> + overflowPosition);
<a name="274" href="#274">274</a>                     }
<a name="275" href="#275">275</a> 
<a name="276" href="#276">276</a>                     oldPos = pos;
<a name="277" href="#277">277</a>                     matchCount = 0;
<a name="278" href="#278">278</a>                 }
<a name="279" href="#279">279</a>             } <strong class="jxr_keyword">else</strong> {
<a name="280" href="#280">280</a>                 <em class="jxr_comment">// fix for DIRMINA-506</em>
<a name="281" href="#281">281</a>                 in.position(in.position()-matchCount);
<a name="282" href="#282">282</a>                 matchCount = 0;
<a name="283" href="#283">283</a>             }
<a name="284" href="#284">284</a>         }
<a name="285" href="#285">285</a> 
<a name="286" href="#286">286</a>         <em class="jxr_comment">// Put remainder to buf.</em>
<a name="287" href="#287">287</a>         in.position(oldPos);
<a name="288" href="#288">288</a>         ctx.append(in);
<a name="289" href="#289">289</a> 
<a name="290" href="#290">290</a>         ctx.setMatchCount(matchCount);
<a name="291" href="#291">291</a>     }
<a name="292" href="#292">292</a> 
<a name="293" href="#293">293</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/mina/filter/codec/textline/TextLineDecoder.html">Context</a> {
<a name="294" href="#294">294</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> CharsetDecoder decoder;
<a name="295" href="#295">295</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> buf;
<a name="296" href="#296">296</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> matchCount = 0;
<a name="297" href="#297">297</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> overflowPosition = 0;
<a name="298" href="#298">298</a> 
<a name="299" href="#299">299</a>         <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/mina/filter/codec/textline/TextLineDecoder.html">Context</a>() {
<a name="300" href="#300">300</a>             decoder = charset.newDecoder();
<a name="301" href="#301">301</a>             buf = IoBuffer.allocate(80).setAutoExpand(<strong class="jxr_keyword">true</strong>);
<a name="302" href="#302">302</a>         }
<a name="303" href="#303">303</a> 
<a name="304" href="#304">304</a>         <strong class="jxr_keyword">public</strong> CharsetDecoder getDecoder() {
<a name="305" href="#305">305</a>             <strong class="jxr_keyword">return</strong> decoder;
<a name="306" href="#306">306</a>         }
<a name="307" href="#307">307</a> 
<a name="308" href="#308">308</a>         <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> getBuffer() {
<a name="309" href="#309">309</a>             <strong class="jxr_keyword">return</strong> buf;
<a name="310" href="#310">310</a>         }
<a name="311" href="#311">311</a> 
<a name="312" href="#312">312</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getOverflowPosition() {
<a name="313" href="#313">313</a>             <strong class="jxr_keyword">return</strong> overflowPosition;
<a name="314" href="#314">314</a>         }
<a name="315" href="#315">315</a> 
<a name="316" href="#316">316</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getMatchCount() {
<a name="317" href="#317">317</a>             <strong class="jxr_keyword">return</strong> matchCount;
<a name="318" href="#318">318</a>         }
<a name="319" href="#319">319</a> 
<a name="320" href="#320">320</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setMatchCount(<strong class="jxr_keyword">int</strong> matchCount) {
<a name="321" href="#321">321</a>             <strong class="jxr_keyword">this</strong>.matchCount = matchCount;
<a name="322" href="#322">322</a>         }
<a name="323" href="#323">323</a> 
<a name="324" href="#324">324</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> reset() {
<a name="325" href="#325">325</a>             overflowPosition = 0;
<a name="326" href="#326">326</a>             matchCount = 0;
<a name="327" href="#327">327</a>             decoder.reset();
<a name="328" href="#328">328</a>         }
<a name="329" href="#329">329</a> 
<a name="330" href="#330">330</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> append(<a href="../../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> in) {
<a name="331" href="#331">331</a>             <strong class="jxr_keyword">if</strong> (overflowPosition != 0) {
<a name="332" href="#332">332</a>                 discard(in);
<a name="333" href="#333">333</a>             } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (buf.position() &gt; maxLineLength - in.remaining()) {
<a name="334" href="#334">334</a>                     overflowPosition = buf.position();
<a name="335" href="#335">335</a>                     buf.clear();
<a name="336" href="#336">336</a>                     discard(in);
<a name="337" href="#337">337</a>             } <strong class="jxr_keyword">else</strong> {
<a name="338" href="#338">338</a>                 getBuffer().put(in);
<a name="339" href="#339">339</a>             }
<a name="340" href="#340">340</a>         }
<a name="341" href="#341">341</a> 
<a name="342" href="#342">342</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> discard(<a href="../../../../../../org/apache/mina/common/IoBuffer.html">IoBuffer</a> in) {
<a name="343" href="#343">343</a>             <strong class="jxr_keyword">if</strong> (Integer.MAX_VALUE - in.remaining() &lt; overflowPosition) {
<a name="344" href="#344">344</a>                 overflowPosition = Integer.MAX_VALUE;
<a name="345" href="#345">345</a>             } <strong class="jxr_keyword">else</strong> {
<a name="346" href="#346">346</a>                 overflowPosition += in.remaining();
<a name="347" href="#347">347</a>             }
<a name="348" href="#348">348</a>             in.position(in.limit());
<a name="349" href="#349">349</a>         }
<a name="350" href="#350">350</a>     }
<a name="351" href="#351">351</a> }
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