<a name="141" href="#141">141</a>         File f = <strong>new</strong> File(aFileName);<a name="142" href="#142">142</a>         <strong>long</strong> logsize = f.length();<a name="143" href="#143">143</a>         <strong>try</strong> {<a name="144" href="#144">144</a>             <strong>return</strong> get(seriesReader(aFileName),lineNumber,n,logsize);<a name="145" href="#145">145</a>         } <strong>catch</strong> (IOException e) {<a name="146" href="#146">146</a>             e.printStackTrace();<a name="147" href="#147">147</a>             <strong>return</strong> <strong>null</strong>;<a name="148" href="#148">148</a>         }<a name="149" href="#149">149</a>     }<a name="150" href="#150">150</a> <a name="151" href="#151">151</a>     <strong>public</strong> <strong>static</strong> String buildDisplayingHeader(<strong>int</strong> len, <strong>long</strong> logsize)<a name="152" href="#152">152</a>     {<a name="153" href="#153">153</a>         <strong>double</strong> percent = 0.0;<a name="154" href="#154">154</a>         <strong>if</strong> (logsize != 0) {<a name="155" href="#155">155</a>             percent = ((<strong>double</strong>) len/logsize) * 100;<a name="156" href="#156">156</a>         }<a name="157" href="#157">157</a>         <strong>return</strong> <span class="string">"Displaying: "</span> + ArchiveUtils.doubleToString(percent,1) +<a name="158" href="#158">158</a>             <span class="string">"% of "</span> + ArchiveUtils.formatBytesForDisplay(logsize);<a name="159" href="#159">159</a>     }<a name="160" href="#160">160</a> <a name="161" href="#161">161</a>     <em>/**<em>*</em></em><a name="162" href="#162">162</a> <em>     * Gets a portion of a log file. Starting at a given line number and the n-1</em><a name="163" href="#163">163</a> <em>     * lines following that one or until the end of the log if that is reached</em><a name="164" href="#164">164</a> <em>     * first.</em><a name="165" href="#165">165</a> <em>     *</em><a name="166" href="#166">166</a> <em>     * @param reader source to scan for lines</em><a name="167" href="#167">167</a> <em>     * @param lineNumber The number of the first line to get (if larger then the</em><a name="168" href="#168">168</a> <em>     *                   file an empty string will be returned)</em><a name="169" href="#169">169</a> <em>     * @param n How many lines to return (total, including the one indicated by</em><a name="170" href="#170">170</a> <em>     *                   lineNumber). If smaller then 1 then an empty string</em><a name="171" href="#171">171</a> <em>     *                   will be returned.</em><a name="172" href="#172">172</a> <em>     *</em><a name="173" href="#173">173</a> <em>     * @param logsize total size of source</em><a name="174" href="#174">174</a> <em>     * @return An array of two strings is returned. At index 0 a portion of the</em><a name="175" href="#175">175</a> <em>     *         file starting at lineNumber and reaching lineNumber+n is located.</em><a name="176" href="#176">176</a> <em>     *         At index 1 there is an informational string about how large a</em><a name="177" href="#177">177</a> <em>     *         segment of the file is being returned.</em><a name="178" href="#178">178</a> <em>     *         Null is returned if errors occur (file not found or io exception)</em><a name="179" href="#179">179</a> <em>     */</em><a name="180" href="#180">180</a>     <strong>public</strong> <strong>static</strong> String[] get(InputStreamReader reader, <a name="181" href="#181">181</a>                                <strong>int</strong> lineNumber, <a name="182" href="#182">182</a>                                <strong>int</strong> n, <a name="183" href="#183">183</a>                                <strong>long</strong> logsize)<a name="184" href="#184">184</a>     {<a name="185" href="#185">185</a>         StringBuffer ret = <strong>new</strong> StringBuffer();<a name="186" href="#186">186</a>         String info = <strong>null</strong>;<a name="187" href="#187">187</a>         <strong>try</strong>{<a name="188" href="#188">188</a>             BufferedReader bf = <strong>new</strong> BufferedReader(reader, 8192);<a name="189" href="#189">189</a> <a name="190" href="#190">190</a>             String line = <strong>null</strong>;<a name="191" href="#191">191</a>             <strong>int</strong> i=1;<a name="192" href="#192">192</a>             <strong>while</strong> ((line = bf.readLine()) != <strong>null</strong>) {<a name="193" href="#193">193</a>                 <strong>if</strong>(i >= lineNumber &amp;&amp; i &lt; (lineNumber+n))<a name="194" href="#194">194</a>                 {<a name="195" href="#195">195</a>                     ret.append(line);<a name="196" href="#196">196</a>                     ret.append('\n');<a name="197" href="#197">197</a>                 } <strong>else</strong> <strong>if</strong>( i >= (lineNumber+n)){<a name="198" href="#198">198</a>                     <strong>break</strong>;<a name="199" href="#199">199</a>                 }<a name="200" href="#200">200</a>                 i++;<a name="201" href="#201">201</a>             }<a name="202" href="#202">202</a>             info = buildDisplayingHeader(ret.length(), logsize);<a name="203" href="#203">203</a>         }<strong>catch</strong>(IOException e){<a name="204" href="#204">204</a>             e.printStackTrace();<a name="205" href="#205">205</a>             <strong>return</strong> <strong>null</strong>;<a name="206" href="#206">206</a>         }<a name="207" href="#207">207</a>         String[] tmp = {ret.toString(),info};<a name="208" href="#208">208</a>         <strong>return</strong> tmp;<a name="209" href="#209">209</a>     }<a name="210" href="#210">210</a> <a name="211" href="#211">211</a>     <em>/**<em>*</em></em><a name="212" href="#212">212</a> <em>     * Return the line number of the first line in the</em><a name="213" href="#213">213</a> <em>     * log/file that matches a given regular expression.</em><a name="214" href="#214">214</a> <em>     *</em><a name="215" href="#215">215</a> <em>     * @param aFileName The filename of the log/file</em><a name="216" href="#216">216</a> <em>     * @param regExpr The regular expression that is to be used</em><a name="217" href="#217">217</a> <em>     * @return The line number (counting from 1, not zero) of the first line</em><a name="218" href="#218">218</a> <em>     *         that matches the given regular expression. -1 is returned if no</em><a name="219" href="#219">219</a> <em>     *         line matches the regular expression. -1 also is returned if </em><a name="220" href="#220">220</a> <em>     *         errors occur (file not found, io exception etc.)</em><a name="221" href="#221">221</a> <em>     */</em><a name="222" href="#222">222</a>     <strong>public</strong> <strong>static</strong> <strong>int</strong> findFirstLineContaining(String aFileName, String regExpr)<a name="223" href="#223">223</a>     {<a name="224" href="#224">224</a>         <strong>try</strong> {<a name="225" href="#225">225</a>             <strong>return</strong> findFirstLineContaining(<strong>new</strong> FileReader(aFileName), regExpr);<a name="226" href="#226">226</a>         } <strong>catch</strong> (FileNotFoundException e) {<a name="227" href="#227">227</a>             e.printStackTrace();<a name="228" href="#228">228</a>             <strong>return</strong> -1;<a name="229" href="#229">229</a>         }<a name="230" href="#230">230</a>     }<a name="231" href="#231">231</a> <a name="232" href="#232">232</a>     <em>/**<em>*</em></em><a name="233" href="#233">233</a> <em>     * Return the line number of the first line in the</em><a name="234" href="#234">234</a> <em>     * log/file that begins with the given string.</em><a name="235" href="#235">235</a> <em>     *</em><a name="236" href="#236">236</a> <em>     * @param aFileName The filename of the log/file</em><a name="237" href="#237">237</a> <em>     * @param prefix The prefix string to match</em><a name="238" href="#238">238</a> <em>     * @return The line number (counting from 1, not zero) of the first line</em><a name="239" href="#239">239</a> <em>     *         that matches the given regular expression. -1 is returned if no</em><a name="240" href="#240">240</a> <em>     *         line matches the regular expression. -1 also is returned if </em><a name="241" href="#241">241</a> <em>     *         errors occur (file not found, io exception etc.)</em><a name="242" href="#242">242</a> <em>     */</em><a name="243" href="#243">243</a>     <strong>public</strong> <strong>static</strong> <strong>int</strong> findFirstLineBeginningFromSeries(String aFileName, <a name="244" href="#244">244</a>                                                         String prefix)<a name="245" href="#245">245</a>     {<a name="246" href="#246">246</a>         <strong>try</strong> {<a name="247" href="#247">247</a>             <strong>return</strong> findFirstLineBeginning(seriesReader(aFileName), prefix);<a name="248" href="#248">248</a>         } <strong>catch</strong> (IOException e) {<a name="249" href="#249">249</a>             e.printStackTrace();<a name="250" href="#250">250</a>             <strong>return</strong> -1;<a name="251" href="#251">251</a>         }<a name="252" href="#252">252</a>     }<a name="253" href="#253">253</a>     <a name="254" href="#254">254</a>     <em>/**<em>*</em></em><a name="255" href="#255">255</a> <em>     * Return the line number of the first line in the</em><a name="256" href="#256">256</a> <em>     * log/file that that begins with the given string.</em><a name="257" href="#257">257</a> <em>     *</em><a name="258" href="#258">258</a> <em>     * @param reader The reader of the log/file</em><a name="259" href="#259">259</a> <em>     * @param prefix The prefix string to match</em><a name="260" href="#260">260</a> <em>     * @return The line number (counting from 1, not zero) of the first line</em><a name="261" href="#261">261</a> <em>     *         that matches the given regular expression. -1 is returned if no</em><a name="262" href="#262">262</a> <em>     *         line matches the regular expression. -1 also is returned if </em><a name="263" href="#263">263</a> <em>     *         errors occur (file not found, io exception etc.)</em><a name="264" href="#264">264</a> <em>     */</em><a name="265" href="#265">265</a>     <strong>public</strong> <strong>static</strong> <strong>int</strong> findFirstLineBeginning(InputStreamReader reader, <a name="266" href="#266">266</a>                                               String prefix)<a name="267" href="#267">267</a>     {<a name="268" href="#268">268</a> <a name="269" href="#269">269</a>         <strong>try</strong>{<a name="270" href="#270">270</a>             BufferedReader bf = <strong>new</strong> BufferedReader(reader, 8192);<a name="271" href="#271">271</a> <a name="272" href="#272">272</a>             String line = <strong>null</strong>;<a name="273" href="#273">273</a>             <strong>int</strong> i = 1;<a name="274" href="#274">274</a>             <strong>while</strong> ((line = bf.readLine()) != <strong>null</strong>) {<a name="275" href="#275">275</a>                 <strong>if</strong>(line.startsWith(prefix)){<a name="276" href="#276">276</a>                     <em class="comment">// Found a match</em><a name="277" href="#277">277</a>                     <strong>return</strong> i;<a name="278" href="#278">278</a>                 }<a name="279" href="#279">279</a>                 i++;<a name="280" href="#280">280</a>             }<a name="281" href="#281">281</a>         } <strong>catch</strong>(IOException e){<a name="282" href="#282">282</a>             e.printStackTrace();<a name="283" href="#283">283</a>         }<a name="284" href="#284">284</a>         <strong>return</strong> -1;<a name="285" href="#285">285</a>     }<a name="286" href="#286">286</a>     <a name="287" href="#287">287</a>     <em>/**<em>*</em></em><a name="288" href="#288">288</a> <em>     * Return the line number of the first line in the</em><a name="289" href="#289">289</a> <em>     * log/file that matches a given regular expression.</em>