archiveutils.html

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<a name="296" href="#296">296</a>                 }
<a name="297" href="#297">297</a>             }
<a name="298" href="#298">298</a>             date = ArchiveUtils.parse12DigitDate(sb.toString());
<a name="299" href="#299">299</a>         }
<a name="300" href="#300">300</a> 
<a name="301" href="#301">301</a>         <strong>return</strong> date;
<a name="302" href="#302">302</a>     }
<a name="303" href="#303">303</a> 
<a name="304" href="#304">304</a>     <em>/**<em>*</em></em>
<a name="305" href="#305">305</a> <em>     * Utility function for parsing arc-style date stamps</em>
<a name="306" href="#306">306</a> <em>     * in the format yyyMMddHHmmssSSS.</em>
<a name="307" href="#307">307</a> <em>     * Date stamps are in the UTC time zone.  The whole string will not be</em>
<a name="308" href="#308">308</a> <em>     * parsed, only the first 17 digits.</em>
<a name="309" href="#309">309</a> <em>     *</em>
<a name="310" href="#310">310</a> <em>     * @param date an arc-style formatted date stamp</em>
<a name="311" href="#311">311</a> <em>     * @return the Date corresponding to the date stamp string</em>
<a name="312" href="#312">312</a> <em>     * @throws ParseException if the inputstring was malformed</em>
<a name="313" href="#313">313</a> <em>     */</em>
<a name="314" href="#314">314</a>     <strong>public</strong> <strong>static</strong> Date parse17DigitDate(String date) throws ParseException {
<a name="315" href="#315">315</a>         <strong>return</strong> TIMESTAMP17.get().parse(date);
<a name="316" href="#316">316</a>     }
<a name="317" href="#317">317</a> 
<a name="318" href="#318">318</a>     <em>/**<em>*</em></em>
<a name="319" href="#319">319</a> <em>     * Utility function for parsing arc-style date stamps</em>
<a name="320" href="#320">320</a> <em>     * in the format yyyMMddHHmmss.</em>
<a name="321" href="#321">321</a> <em>     * Date stamps are in the UTC time zone.  The whole string will not be</em>
<a name="322" href="#322">322</a> <em>     * parsed, only the first 14 digits.</em>
<a name="323" href="#323">323</a> <em>     *</em>
<a name="324" href="#324">324</a> <em>     * @param date an arc-style formatted date stamp</em>
<a name="325" href="#325">325</a> <em>     * @return the Date corresponding to the date stamp string</em>
<a name="326" href="#326">326</a> <em>     * @throws ParseException if the inputstring was malformed</em>
<a name="327" href="#327">327</a> <em>     */</em>
<a name="328" href="#328">328</a>     <strong>public</strong> <strong>static</strong> Date parse14DigitDate(String date) throws ParseException{
<a name="329" href="#329">329</a>         <strong>return</strong> TIMESTAMP14.get().parse(date);
<a name="330" href="#330">330</a>     }
<a name="331" href="#331">331</a> 
<a name="332" href="#332">332</a>     <em>/**<em>*</em></em>
<a name="333" href="#333">333</a> <em>     * Utility function for parsing arc-style date stamps</em>
<a name="334" href="#334">334</a> <em>     * in the format yyyMMddHHmm.</em>
<a name="335" href="#335">335</a> <em>     * Date stamps are in the UTC time zone.  The whole string will not be</em>
<a name="336" href="#336">336</a> <em>     * parsed, only the first 12 digits.</em>
<a name="337" href="#337">337</a> <em>     *</em>
<a name="338" href="#338">338</a> <em>     * @param date an arc-style formatted date stamp</em>
<a name="339" href="#339">339</a> <em>     * @return the Date corresponding to the date stamp string</em>
<a name="340" href="#340">340</a> <em>     * @throws ParseException if the inputstring was malformed</em>
<a name="341" href="#341">341</a> <em>     */</em>
<a name="342" href="#342">342</a>     <strong>public</strong> <strong>static</strong> Date parse12DigitDate(String date) throws ParseException{
<a name="343" href="#343">343</a>         <strong>return</strong> TIMESTAMP12.get().parse(date);
<a name="344" href="#344">344</a>     }
<a name="345" href="#345">345</a>     
<a name="346" href="#346">346</a>     <em>/**<em>*</em></em>
<a name="347" href="#347">347</a> <em>     * Convert 17-digit date format timestamps (as found in crawl.log, for</em>
<a name="348" href="#348">348</a> <em>     * example) into a GregorianCalendar object. + * Useful so you can convert</em>
<a name="349" href="#349">349</a> <em>     * into milliseconds-since-epoch. Note: it is possible to compute</em>
<a name="350" href="#350">350</a> <em>     * milliseconds-since-epoch + * using {@link #parse17DigitDate}.UTC(), but</em>
<a name="351" href="#351">351</a> <em>     * that method is deprecated in favor of using Calendar.getTimeInMillis(). + *</em>
<a name="352" href="#352">352</a> <em>     * &lt;p/>I probably should have dug into all the utility methods in</em>
<a name="353" href="#353">353</a> <em>     * DateFormat.java to parse the timestamp, but this was + * easier. If</em>
<a name="354" href="#354">354</a> <em>     * someone wants to fix this to use those methods, please have at it! &lt;p/></em>
<a name="355" href="#355">355</a> <em>     * Mike Schwartz, schwartz at CodeOnTheRoad dot com.</em>
<a name="356" href="#356">356</a> <em>     * </em>
<a name="357" href="#357">357</a> <em>     * @param timestamp17String</em>
<a name="358" href="#358">358</a> <em>     * @return Calendar set to &lt;code>timestamp17String&lt;/code>.</em>
<a name="359" href="#359">359</a> <em>     */</em>
<a name="360" href="#360">360</a>     <strong>public</strong> <strong>static</strong> Calendar timestamp17ToCalendar(String timestamp17String) {
<a name="361" href="#361">361</a>         GregorianCalendar calendar = <strong>new</strong> GregorianCalendar();
<a name="362" href="#362">362</a>         <strong>int</strong> year = Integer.parseInt(timestamp17String.substring(0, 4));
<a name="363" href="#363">363</a>         <strong>int</strong> dayOfMonth = Integer.parseInt(timestamp17String.substring(6, 8));
<a name="364" href="#364">364</a>         <em class="comment">// Month is 0-based</em>
<a name="365" href="#365">365</a>         <strong>int</strong> month = Integer.parseInt(timestamp17String.substring(4, 6)) - 1;
<a name="366" href="#366">366</a>         <strong>int</strong> hourOfDay = Integer.parseInt(timestamp17String.substring(8, 10));
<a name="367" href="#367">367</a>         <strong>int</strong> minute = Integer.parseInt(timestamp17String.substring(10, 12));
<a name="368" href="#368">368</a>         <strong>int</strong> second = Integer.parseInt(timestamp17String.substring(12, 14));
<a name="369" href="#369">369</a>         <strong>int</strong> milliseconds = Integer
<a name="370" href="#370">370</a>                 .parseInt(timestamp17String.substring(14, 17));
<a name="371" href="#371">371</a>         calendar.set(Calendar.YEAR, year);
<a name="372" href="#372">372</a>         calendar.set(Calendar.MONTH, month);
<a name="373" href="#373">373</a>         calendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
<a name="374" href="#374">374</a>         calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
<a name="375" href="#375">375</a>         calendar.set(Calendar.MINUTE, minute);
<a name="376" href="#376">376</a>         calendar.set(Calendar.SECOND, second);
<a name="377" href="#377">377</a>         calendar.set(Calendar.MILLISECOND, milliseconds);
<a name="378" href="#378">378</a>         <strong>return</strong> calendar;
<a name="379" href="#379">379</a>     }
<a name="380" href="#380">380</a>     
<a name="381" href="#381">381</a>     <em>/**<em>*</em></em>
<a name="382" href="#382">382</a> <em>     * @param timestamp A 14-digit timestamp or the suffix for a 14-digit</em>
<a name="383" href="#383">383</a> <em>     * timestamp: E.g. '20010909014640' or '20010101' or '1970'.</em>
<a name="384" href="#384">384</a> <em>     * @return Seconds since the epoch as a string zero-pre-padded so always</em>
<a name="385" href="#385">385</a> <em>     * Integer.MAX_VALUE wide (Makes it so sorting of resultant string works</em>
<a name="386" href="#386">386</a> <em>     * properly).</em>
<a name="387" href="#387">387</a> <em>     * @throws ParseException </em>
<a name="388" href="#388">388</a> <em>     */</em>
<a name="389" href="#389">389</a>     <strong>public</strong> <strong>static</strong> String secondsSinceEpoch(String timestamp)
<a name="390" href="#390">390</a>     throws ParseException {
<a name="391" href="#391">391</a>         <strong>return</strong> zeroPadInteger((<strong>int</strong>)
<a name="392" href="#392">392</a>             (getSecondsSinceEpoch(timestamp).getTime()/1000));
<a name="393" href="#393">393</a>     }
<a name="394" href="#394">394</a>     
<a name="395" href="#395">395</a>     <em>/**<em>*</em></em>
<a name="396" href="#396">396</a> <em>     * @param timestamp A 14-digit timestamp or the suffix for a 14-digit</em>
<a name="397" href="#397">397</a> <em>     * timestamp: E.g. '20010909014640' or '20010101' or '1970'.</em>
<a name="398" href="#398">398</a> <em>     * @return A date.</em>
<a name="399" href="#399">399</a> <em>     * @see #secondsSinceEpoch(String)</em>
<a name="400" href="#400">400</a> <em>     * @throws ParseException </em>
<a name="401" href="#401">401</a> <em>     */</em>
<a name="402" href="#402">402</a>     <strong>public</strong> <strong>static</strong> Date getSecondsSinceEpoch(String timestamp)
<a name="403" href="#403">403</a>     throws ParseException {
<a name="404" href="#404">404</a>         <strong>if</strong> (timestamp.length() &lt; 14) {
<a name="405" href="#405">405</a>             <strong>if</strong> (timestamp.length() &lt; 10 &amp;&amp; (timestamp.length() % 2) == 1) {
<a name="406" href="#406">406</a>                 <strong>throw</strong> <strong>new</strong> IllegalArgumentException(<span class="string">"Must have year, "</span> +
<a name="407" href="#407">407</a>                     <span class="string">"month, date, hour or second granularity: "</span> + timestamp);
<a name="408" href="#408">408</a>             }
<a name="409" href="#409">409</a>             <strong>if</strong> (timestamp.length() == 4) {
<a name="410" href="#410">410</a>                 <em class="comment">// Add first month and first date.</em>
<a name="411" href="#411">411</a>                 timestamp = timestamp + <span class="string">"01010000"</span>;
<a name="412" href="#412">412</a>             }
<a name="413" href="#413">413</a>             <strong>if</strong> (timestamp.length() == 6) {
<a name="414" href="#414">414</a>                 <em class="comment">// Add a date of the first.</em>
<a name="415" href="#415">415</a>                 timestamp = timestamp + <span class="string">"010000"</span>;
<a name="416" href="#416">416</a>             }
<a name="417" href="#417">417</a>             <strong>if</strong> (timestamp.length() &lt; 14) {
<a name="418" href="#418">418</a>                 timestamp = timestamp +
<a name="419" href="#419">419</a>                     ArchiveUtils.padTo(<span class="string">""</span>, 14 - timestamp.length(), '0');
<a name="420" href="#420">420</a>             }
<a name="421" href="#421">421</a>         }
<a name="422" href="#422">422</a>         <strong>return</strong> ArchiveUtils.parse14DigitDate(timestamp);
<a name="423" href="#423">423</a>     }
<a name="424" href="#424">424</a>     
<a name="425" href="#425">425</a>     <em>/**<em>*</em></em>
<a name="426" href="#426">426</a> <em>     * @param i Integer to add prefix of zeros too.  If passed</em>
<a name="427" href="#427">427</a> <em>     * 2005, will return the String &lt;code>0000002005&lt;/code>. String</em>
<a name="428" href="#428">428</a> <em>     * width is the width of Integer.MAX_VALUE as a string (10</em>
<a name="429" href="#429">429</a> <em>     * digits).</em>
<a name="430" href="#430">430</a> <em>     * @return Padded String version of &lt;code>i&lt;/code>.</em>
<a name="431" href="#431">431</a> <em>     */</em>
<a name="432" href="#432">432</a>     <strong>public</strong> <strong>static</strong> String zeroPadInteger(<strong>int</strong> i) {
<a name="433" href="#433">433</a>         <strong>return</strong> ArchiveUtils.padTo(Integer.toString(i),
<a name="434" href="#434">434</a>                 MAX_INT_CHAR_WIDTH, '0');
<a name="435" href="#435">435</a>     }
<a name="436" href="#436">436</a> 
<a name="437" href="#437">437</a>     <em>/**<em>* </em></em>
<a name="438" href="#438">438</a> <em>     * Convert an &lt;code>int&lt;/code> to a &lt;code>String&lt;/code>, and pad it to</em>
<a name="439" href="#439">439</a> <em>     * &lt;code>pad&lt;/code> spaces.</em>
<a name="440" href="#440">440</a> <em>     * @param i the int</em>
<a name="441" href="#441">441</a> <em>     * @param pad the width to pad to.</em>
<a name="442" href="#442">442</a> <em>     * @return String w/ padding.</em>
<a name="443" href="#443">443</a> <em>     */</em>
<a name="444" href="#444">444</a>     <strong>public</strong> <strong>static</strong> String padTo(<strong>final</strong> <strong>int</strong> i, <strong>final</strong> <strong>int</strong> pad) {
<a name="445" href="#445">445</a>         String n = Integer.toString(i);
<a name="446" href="#446">446</a>         <strong>return</strong> padTo(n, pad);
<a name="447" href="#447">447</a>     }