replayinputstream.html

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<a name="137" href="#137">137</a>         }
<a name="138" href="#138">138</a>         <strong>if</strong> (position &lt; buffer.length) {
<a name="139" href="#139">139</a>             <strong>int</strong> toCopy = (<strong>int</strong>)Math.min(size - position,
<a name="140" href="#140">140</a>                 Math.min(len, buffer.length - position));
<a name="141" href="#141">141</a>             System.arraycopy(buffer, (<strong>int</strong>)position, b, off, toCopy);
<a name="142" href="#142">142</a>             <strong>if</strong> (toCopy > 0) {
<a name="143" href="#143">143</a>                 position += toCopy;
<a name="144" href="#144">144</a>             }
<a name="145" href="#145">145</a>             <strong>return</strong> toCopy;
<a name="146" href="#146">146</a>         }
<a name="147" href="#147">147</a>         <em class="comment">// into disk zone</em>
<a name="148" href="#148">148</a>         <strong>int</strong> read = diskStream.read(b,off,len);
<a name="149" href="#149">149</a>         <strong>if</strong>(read>0) {
<a name="150" href="#150">150</a>             position += read;
<a name="151" href="#151">151</a>         }
<a name="152" href="#152">152</a>         <strong>return</strong> read;
<a name="153" href="#153">153</a>     }
<a name="154" href="#154">154</a> 
<a name="155" href="#155">155</a>     <strong>public</strong> <strong>void</strong> readFullyTo(OutputStream os) throws IOException {
<a name="156" href="#156">156</a>         byte[] buf = <strong>new</strong> byte[4096];
<a name="157" href="#157">157</a>         <strong>int</strong> c = read(buf);
<a name="158" href="#158">158</a>         <strong>while</strong> (c != -1) {
<a name="159" href="#159">159</a>             os.write(buf,0,c);
<a name="160" href="#160">160</a>             c = read(buf);
<a name="161" href="#161">161</a>         }
<a name="162" href="#162">162</a>     }
<a name="163" href="#163">163</a>     
<a name="164" href="#164">164</a>     <em class="comment">/*</em>
<a name="165" href="#165">165</a> <em class="comment">     * Like 'readFullyTo', but only reads the header-part.</em>
<a name="166" href="#166">166</a> <em class="comment">     * Starts from the beginning each time it is called.</em>
<a name="167" href="#167">167</a> <em class="comment">     */</em>
<a name="168" href="#168">168</a>     <strong>public</strong> <strong>void</strong> readHeaderTo(OutputStream os) throws IOException {
<a name="169" href="#169">169</a>         position = 0;
<a name="170" href="#170">170</a>         byte[] buf = <strong>new</strong> byte[(<strong>int</strong>)responseBodyStart];
<a name="171" href="#171">171</a>         <strong>int</strong> c = read(buf,0,buf.length);
<a name="172" href="#172">172</a>         <strong>if</strong>(c != -1) {
<a name="173" href="#173">173</a>             os.write(buf,0,c);
<a name="174" href="#174">174</a>         }
<a name="175" href="#175">175</a>     }
<a name="176" href="#176">176</a> 
<a name="177" href="#177">177</a>     <em class="comment">/*</em>
<a name="178" href="#178">178</a> <em class="comment">     * Like 'readFullyTo', but only reads the content-part.</em>
<a name="179" href="#179">179</a> <em class="comment">     */</em>
<a name="180" href="#180">180</a>     <strong>public</strong> <strong>void</strong> readContentTo(OutputStream os) throws IOException {
<a name="181" href="#181">181</a>         setToResponseBodyStart();
<a name="182" href="#182">182</a>         byte[] buf = <strong>new</strong> byte[4096];
<a name="183" href="#183">183</a>         <strong>int</strong> c = read(buf);
<a name="184" href="#184">184</a>         <strong>while</strong> (c != -1) {
<a name="185" href="#185">185</a>             os.write(buf,0,c);
<a name="186" href="#186">186</a>             c = read(buf);            
<a name="187" href="#187">187</a>         }
<a name="188" href="#188">188</a>     }
<a name="189" href="#189">189</a>     
<a name="190" href="#190">190</a>     <strong>public</strong> <strong>void</strong> readContentTo(OutputStream os, <strong>int</strong> maxSize) throws IOException {
<a name="191" href="#191">191</a>         setToResponseBodyStart();
<a name="192" href="#192">192</a>         byte[] buf = <strong>new</strong> byte[4096];
<a name="193" href="#193">193</a>         <strong>int</strong> c = read(buf);
<a name="194" href="#194">194</a>         <strong>int</strong> tot = 0;
<a name="195" href="#195">195</a>         <strong>while</strong> (c != -1 &amp;&amp; tot &lt; maxSize) {
<a name="196" href="#196">196</a>             os.write(buf,0,c);
<a name="197" href="#197">197</a>             c = read(buf);
<a name="198" href="#198">198</a>             tot += c;
<a name="199" href="#199">199</a>         }
<a name="200" href="#200">200</a>     }
<a name="201" href="#201">201</a> 
<a name="202" href="#202">202</a>     <em class="comment">/*<em class="comment"> (non-Javadoc)</em></em>
<a name="203" href="#203">203</a> <em class="comment">     * @see java.io.InputStream#close()</em>
<a name="204" href="#204">204</a> <em class="comment">     */</em>
<a name="205" href="#205">205</a>     <strong>public</strong> <strong>void</strong> close() throws IOException {
<a name="206" href="#206">206</a>         <strong>super</strong>.close();
<a name="207" href="#207">207</a>         <strong>if</strong>(diskStream != <strong>null</strong>) {
<a name="208" href="#208">208</a>             diskStream.close();
<a name="209" href="#209">209</a>         }
<a name="210" href="#210">210</a>     }
<a name="211" href="#211">211</a> 
<a name="212" href="#212">212</a>     <em>/**<em>*</em></em>
<a name="213" href="#213">213</a> <em>     * Total size of stream content.</em>
<a name="214" href="#214">214</a> <em>     * @return Returns the size.</em>
<a name="215" href="#215">215</a> <em>     */</em>
<a name="216" href="#216">216</a>     <strong>public</strong> <strong>long</strong> getSize()
<a name="217" href="#217">217</a>     {
<a name="218" href="#218">218</a>         <strong>return</strong> size;
<a name="219" href="#219">219</a>     }
<a name="220" href="#220">220</a>     
<a name="221" href="#221">221</a>     <em>/**<em>*</em></em>
<a name="222" href="#222">222</a> <em>     * Total size of header.</em>
<a name="223" href="#223">223</a> <em>     * @return the size of the header.</em>
<a name="224" href="#224">224</a> <em>     */</em>
<a name="225" href="#225">225</a>     <strong>public</strong> <strong>long</strong> getHeaderSize()
<a name="226" href="#226">226</a>     {
<a name="227" href="#227">227</a>         <strong>return</strong> responseBodyStart;
<a name="228" href="#228">228</a>     }
<a name="229" href="#229">229</a>     
<a name="230" href="#230">230</a>     <em>/**<em>*</em></em>
<a name="231" href="#231">231</a> <em>     * Total size of content.</em>
<a name="232" href="#232">232</a> <em>     * @return the size of the content.</em>
<a name="233" href="#233">233</a> <em>     */</em>
<a name="234" href="#234">234</a>     <strong>public</strong> <strong>long</strong> getContentSize()
<a name="235" href="#235">235</a>     {
<a name="236" href="#236">236</a>         <strong>return</strong> size - responseBodyStart;
<a name="237" href="#237">237</a>     }
<a name="238" href="#238">238</a> 
<a name="239" href="#239">239</a>     <em>/**<em>*</em></em>
<a name="240" href="#240">240</a> <em>     * @return Amount THEORETICALLY remaining (TODO: Its not theoretical</em>
<a name="241" href="#241">241</a> <em>     * seemingly.  The class implemetentation depends on it being exact).</em>
<a name="242" href="#242">242</a> <em>     */</em>
<a name="243" href="#243">243</a>     <strong>public</strong> <strong>long</strong> remaining() {
<a name="244" href="#244">244</a>         <strong>return</strong> size - position;
<a name="245" href="#245">245</a>     }
<a name="246" href="#246">246</a>     
<a name="247" href="#247">247</a> 
<a name="248" href="#248">248</a>     <em>/**<em>*</em></em>
<a name="249" href="#249">249</a> <em>     * Reposition the stream.</em>
<a name="250" href="#250">250</a> <em>     * </em>
<a name="251" href="#251">251</a> <em>     * @param p  the new position for this stream</em>
<a name="252" href="#252">252</a> <em>     * @throws IOException  if an IO error occurs</em>
<a name="253" href="#253">253</a> <em>     */</em>
<a name="254" href="#254">254</a>     <strong>public</strong> <strong>void</strong> position(<strong>long</strong> p) throws IOException {
<a name="255" href="#255">255</a>         <strong>if</strong> (p &lt; 0) {
<a name="256" href="#256">256</a>             <strong>throw</strong> <strong>new</strong> IOException(<span class="string">"Negative seek offset."</span>);
<a name="257" href="#257">257</a>         }
<a name="258" href="#258">258</a>         <strong>if</strong> (p > size) {
<a name="259" href="#259">259</a>             <strong>throw</strong> <strong>new</strong> IOException(<span class="string">"Desired position exceeds size."</span>);
<a name="260" href="#260">260</a>         }
<a name="261" href="#261">261</a>         <strong>if</strong> (p &lt; buffer.length) {
<a name="262" href="#262">262</a>             <em class="comment">// Only seek file if necessary</em>
<a name="263" href="#263">263</a>             <strong>if</strong> (position > buffer.length) {
<a name="264" href="#264">264</a>                 diskStream.position(0);
<a name="265" href="#265">265</a>             }
<a name="266" href="#266">266</a>         } <strong>else</strong> {
<a name="267" href="#267">267</a>             diskStream.position(p - buffer.length);
<a name="268" href="#268">268</a>         }
<a name="269" href="#269">269</a>         <strong>this</strong>.position = p;
<a name="270" href="#270">270</a>     }
<a name="271" href="#271">271</a>     
<a name="272" href="#272">272</a>     
<a name="273" href="#273">273</a>     <strong>public</strong> <strong>long</strong> position() throws IOException {
<a name="274" href="#274">274</a>         <strong>return</strong> position;
<a name="275" href="#275">275</a>     }
<a name="276" href="#276">276</a> }
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