iobuffertest.html

MINA+API 关于MINA的API

<a name="156" href="#156">156</a>         buf.fill(28);
<a name="157" href="#157">157</a>         buf.compact();
<a name="158" href="#158">158</a>         Assert.assertEquals(8, buf.capacity());
<a name="159" href="#159">159</a>         Assert.assertEquals(4, buf.position());
<a name="160" href="#160">160</a>         Assert.assertEquals(8, buf.limit());
<a name="161" href="#161">161</a>         buf.clear();
<a name="162" href="#162">162</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; 4; i ++) {
<a name="163" href="#163">163</a>             Assert.assertEquals(1, buf.get());
<a name="164" href="#164">164</a>         }
<a name="165" href="#165">165</a> 
<a name="166" href="#166">166</a>         <em class="jxr_comment">// Expand the buffer.</em>
<a name="167" href="#167">167</a>         buf.capacity(32).clear();
<a name="168" href="#168">168</a>         Assert.assertEquals(32, buf.capacity());
<a name="169" href="#169">169</a>         
<a name="170" href="#170">170</a>         <em class="jxr_comment">// Make sure the buffer shrinks when 0 byte is being used.</em>
<a name="171" href="#171">171</a>         buf.fill(32);
<a name="172" href="#172">172</a>         buf.compact();
<a name="173" href="#173">173</a>         Assert.assertEquals(8, buf.capacity());
<a name="174" href="#174">174</a>         Assert.assertEquals(0, buf.position());
<a name="175" href="#175">175</a>         Assert.assertEquals(8, buf.limit());
<a name="176" href="#176">176</a> 
<a name="177" href="#177">177</a>         <em class="jxr_comment">// Expand the buffer.</em>
<a name="178" href="#178">178</a>         buf.capacity(32).clear();
<a name="179" href="#179">179</a>         Assert.assertEquals(32, buf.capacity());
<a name="180" href="#180">180</a>         
<a name="181" href="#181">181</a>         <em class="jxr_comment">// Make sure the buffer doesn't shrink when more than 1/4 is being used.</em>
<a name="182" href="#182">182</a>         buf.sweep((byte) 1);
<a name="183" href="#183">183</a>         buf.fill(23);
<a name="184" href="#184">184</a>         buf.compact();
<a name="185" href="#185">185</a>         Assert.assertEquals(32, buf.capacity());
<a name="186" href="#186">186</a>         Assert.assertEquals(9, buf.position());
<a name="187" href="#187">187</a>         Assert.assertEquals(32, buf.limit());
<a name="188" href="#188">188</a>         buf.clear();
<a name="189" href="#189">189</a>         <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; 9; i ++) {
<a name="190" href="#190">190</a>             Assert.assertEquals(1, buf.get());
<a name="191" href="#191">191</a>         }
<a name="192" href="#192">192</a>     }
<a name="193" href="#193">193</a> 
<a name="194" href="#194">194</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testGetString() <strong class="jxr_keyword">throws</strong> Exception {
<a name="195" href="#195">195</a>         IoBuffer buf = IoBuffer.allocate(16);
<a name="196" href="#196">196</a>         CharsetDecoder decoder;
<a name="197" href="#197">197</a> 
<a name="198" href="#198">198</a>         Charset charset = Charset.forName(<span class="jxr_string">"UTF-8"</span>);
<a name="199" href="#199">199</a>         buf.clear();
<a name="200" href="#200">200</a>         buf.putString(<span class="jxr_string">"hello"</span>, charset.newEncoder());
<a name="201" href="#201">201</a>         buf.put((byte) 0);
<a name="202" href="#202">202</a>         buf.flip();
<a name="203" href="#203">203</a>         Assert.assertEquals(<span class="jxr_string">"hello"</span>, buf.getString(charset.newDecoder()));
<a name="204" href="#204">204</a> 
<a name="205" href="#205">205</a>         buf.clear();
<a name="206" href="#206">206</a>         buf.putString(<span class="jxr_string">"hello"</span>, charset.newEncoder());
<a name="207" href="#207">207</a>         buf.flip();
<a name="208" href="#208">208</a>         Assert.assertEquals(<span class="jxr_string">"hello"</span>, buf.getString(charset.newDecoder()));
<a name="209" href="#209">209</a> 
<a name="210" href="#210">210</a>         decoder = Charset.forName(<span class="jxr_string">"ISO-8859-1"</span>).newDecoder();
<a name="211" href="#211">211</a>         buf.clear();
<a name="212" href="#212">212</a>         buf.put((byte) 'A');
<a name="213" href="#213">213</a>         buf.put((byte) 'B');
<a name="214" href="#214">214</a>         buf.put((byte) 'C');
<a name="215" href="#215">215</a>         buf.put((byte) 0);
<a name="216" href="#216">216</a> 
<a name="217" href="#217">217</a>         buf.position(0);
<a name="218" href="#218">218</a>         Assert.assertEquals(<span class="jxr_string">"ABC"</span>, buf.getString(decoder));
<a name="219" href="#219">219</a>         Assert.assertEquals(4, buf.position());
<a name="220" href="#220">220</a> 
<a name="221" href="#221">221</a>         buf.position(0);
<a name="222" href="#222">222</a>         buf.limit(1);
<a name="223" href="#223">223</a>         Assert.assertEquals(<span class="jxr_string">"A"</span>, buf.getString(decoder));
<a name="224" href="#224">224</a>         Assert.assertEquals(1, buf.position());
<a name="225" href="#225">225</a> 
<a name="226" href="#226">226</a>         buf.clear();
<a name="227" href="#227">227</a>         Assert.assertEquals(<span class="jxr_string">"ABC"</span>, buf.getString(10, decoder));
<a name="228" href="#228">228</a>         Assert.assertEquals(10, buf.position());
<a name="229" href="#229">229</a> 
<a name="230" href="#230">230</a>         buf.clear();
<a name="231" href="#231">231</a>         Assert.assertEquals(<span class="jxr_string">"A"</span>, buf.getString(1, decoder));
<a name="232" href="#232">232</a>         Assert.assertEquals(1, buf.position());
<a name="233" href="#233">233</a> 
<a name="234" href="#234">234</a>         <em class="jxr_comment">// Test a trailing garbage</em>
<a name="235" href="#235">235</a>         buf.clear();
<a name="236" href="#236">236</a>         buf.put((byte) 'A');
<a name="237" href="#237">237</a>         buf.put((byte) 'B');
<a name="238" href="#238">238</a>         buf.put((byte) 0);
<a name="239" href="#239">239</a>         buf.put((byte) 'C');
<a name="240" href="#240">240</a>         buf.position(0);
<a name="241" href="#241">241</a>         Assert.assertEquals(<span class="jxr_string">"AB"</span>, buf.getString(4, decoder));
<a name="242" href="#242">242</a>         Assert.assertEquals(4, buf.position());
<a name="243" href="#243">243</a> 
<a name="244" href="#244">244</a>         buf.clear();
<a name="245" href="#245">245</a>         buf.fillAndReset(buf.limit());
<a name="246" href="#246">246</a>         decoder = Charset.forName(<span class="jxr_string">"UTF-16"</span>).newDecoder();
<a name="247" href="#247">247</a>         buf.put((byte) 0);
<a name="248" href="#248">248</a>         buf.put((byte) 'A');
<a name="249" href="#249">249</a>         buf.put((byte) 0);
<a name="250" href="#250">250</a>         buf.put((byte) 'B');
<a name="251" href="#251">251</a>         buf.put((byte) 0);
<a name="252" href="#252">252</a>         buf.put((byte) 'C');
<a name="253" href="#253">253</a>         buf.put((byte) 0);
<a name="254" href="#254">254</a>         buf.put((byte) 0);
<a name="255" href="#255">255</a> 
<a name="256" href="#256">256</a>         buf.position(0);
<a name="257" href="#257">257</a>         Assert.assertEquals(<span class="jxr_string">"ABC"</span>, buf.getString(decoder));
<a name="258" href="#258">258</a>         Assert.assertEquals(8, buf.position());
<a name="259" href="#259">259</a> 
<a name="260" href="#260">260</a>         buf.position(0);
<a name="261" href="#261">261</a>         buf.limit(2);
<a name="262" href="#262">262</a>         Assert.assertEquals(<span class="jxr_string">"A"</span>, buf.getString(decoder));
<a name="263" href="#263">263</a>         Assert.assertEquals(2, buf.position());
<a name="264" href="#264">264</a> 
<a name="265" href="#265">265</a>         buf.position(0);
<a name="266" href="#266">266</a>         buf.limit(3);
<a name="267" href="#267">267</a>         Assert.assertEquals(<span class="jxr_string">"A"</span>, buf.getString(decoder));
<a name="268" href="#268">268</a>         Assert.assertEquals(2, buf.position());
<a name="269" href="#269">269</a> 
<a name="270" href="#270">270</a>         buf.clear();
<a name="271" href="#271">271</a>         Assert.assertEquals(<span class="jxr_string">"ABC"</span>, buf.getString(10, decoder));
<a name="272" href="#272">272</a>         Assert.assertEquals(10, buf.position());
<a name="273" href="#273">273</a> 
<a name="274" href="#274">274</a>         buf.clear();
<a name="275" href="#275">275</a>         Assert.assertEquals(<span class="jxr_string">"A"</span>, buf.getString(2, decoder));
<a name="276" href="#276">276</a>         Assert.assertEquals(2, buf.position());
<a name="277" href="#277">277</a> 
<a name="278" href="#278">278</a>         buf.clear();
<a name="279" href="#279">279</a>         <strong class="jxr_keyword">try</strong> {
<a name="280" href="#280">280</a>             buf.getString(1, decoder);
<a name="281" href="#281">281</a>             Assert.fail();
<a name="282" href="#282">282</a>         } <strong class="jxr_keyword">catch</strong> (IllegalArgumentException e) {
<a name="283" href="#283">283</a>             <em class="jxr_comment">// ignore</em>
<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">// Test getting strings from an empty buffer.</em>
<a name="287" href="#287">287</a>         buf.clear();
<a name="288" href="#288">288</a>         buf.limit(0);
<a name="289" href="#289">289</a>         Assert.assertEquals(<span class="jxr_string">""</span>, buf.getString(decoder));
<a name="290" href="#290">290</a>         Assert.assertEquals(<span class="jxr_string">""</span>, buf.getString(2, decoder));
<a name="291" href="#291">291</a> 
<a name="292" href="#292">292</a>         <em class="jxr_comment">// Test getting strings from non-empty buffer which is filled with 0x00</em>
<a name="293" href="#293">293</a>         buf.clear();
<a name="294" href="#294">294</a>         buf.putInt(0);
<a name="295" href="#295">295</a>         buf.clear();
<a name="296" href="#296">296</a>         buf.limit(4);
<a name="297" href="#297">297</a>         Assert.assertEquals(<span class="jxr_string">""</span>, buf.getString(decoder));
<a name="298" href="#298">298</a>         Assert.assertEquals(2, buf.position());
<a name="299" href="#299">299</a>         Assert.assertEquals(4, buf.limit());
<a name="300" href="#300">300</a> 
<a name="301" href="#301">301</a>         buf.position(0);
<a name="302" href="#302">302</a>         Assert.assertEquals(<span class="jxr_string">""</span>, buf.getString(2, decoder));
<a name="303" href="#303">303</a>         Assert.assertEquals(2, buf.position());
<a name="304" href="#304">304</a>         Assert.assertEquals(4, buf.limit());
<a name="305" href="#305">305</a>     }
<a name="306" href="#306">306</a> 
<a name="307" href="#307">307</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testGetStringWithFailure() <strong class="jxr_keyword">throws</strong> Exception {
<a name="308" href="#308">308</a>         String test = <span class="jxr_string">"\u30b3\u30e1\u30f3\u30c8\u7de8\u96c6"</span>;
<a name="309" href="#309">309</a>         IoBuffer buffer = IoBuffer.wrap(test.getBytes(<span class="jxr_string">"Shift_JIS"</span>));
<a name="310" href="#310">310</a> 
<a name="311" href="#311">311</a>         <em class="jxr_comment">// Make sure the limit doesn't change when an exception arose.</em>
<a name="312" href="#312">312</a>         <strong class="jxr_keyword">int</strong> oldLimit = buffer.limit();
<a name="313" href="#313">313</a>         <strong class="jxr_keyword">int</strong> oldPos = buffer.position();
<a name="314" href="#314">314</a>         <strong class="jxr_keyword">try</strong> {
<a name="315" href="#315">315</a>             buffer.getString(3, Charset.forName(<span class="jxr_string">"ASCII"</span>).newDecoder());
<a name="316" href="#316">316</a>             Assert.fail();
<a name="317" href="#317">317</a>         } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a name="318" href="#318">318</a>             Assert.assertEquals(oldLimit, buffer.limit());
<a name="319" href="#319">319</a>             Assert.assertEquals(oldPos, buffer.position());
<a name="320" href="#320">320</a>         }