SnappyCompressorInputStream.html 25 KB

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  6. <title>SnappyCompressorInputStream (Apache Commons Compress 1.13 API)</title>
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  85. <div class="subTitle">org.apache.commons.compress.compressors.snappy</div>
  86. <h2 title="Class SnappyCompressorInputStream" class="title">Class SnappyCompressorInputStream</h2>
  87. </div>
  88. <div class="contentContainer">
  89. <ul class="inheritance">
  90. <li><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
  91. <li>
  92. <ul class="inheritance">
  93. <li><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">java.io.InputStream</a></li>
  94. <li>
  95. <ul class="inheritance">
  96. <li><a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html" title="class in org.apache.commons.compress.compressors">org.apache.commons.compress.compressors.CompressorInputStream</a></li>
  97. <li>
  98. <ul class="inheritance">
  99. <li>org.apache.commons.compress.compressors.snappy.SnappyCompressorInputStream</li>
  100. </ul>
  101. </li>
  102. </ul>
  103. </li>
  104. </ul>
  105. </li>
  106. </ul>
  107. <div class="description">
  108. <ul class="blockList">
  109. <li class="blockList">
  110. <dl>
  111. <dt>All Implemented Interfaces:</dt>
  112. <dd><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></dd>
  113. </dl>
  114. <hr>
  115. <br>
  116. <pre>public class <a href="../../../../../../src-html/org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#line.41">SnappyCompressorInputStream</a>
  117. extends <a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html" title="class in org.apache.commons.compress.compressors">CompressorInputStream</a></pre>
  118. <div class="block">CompressorInputStream for the raw Snappy format.
  119. <p>This implementation uses an internal buffer in order to handle
  120. the back-references that are at the heart of the LZ77 algorithm.
  121. The size of the buffer must be at least as big as the biggest
  122. offset used in the compressed stream. The current version of the
  123. Snappy algorithm as defined by Google works on 32k blocks and
  124. doesn't contain offsets bigger than 32k which is the default block
  125. size used by this class.</p></div>
  126. <dl><dt><span class="strong">Since:</span></dt>
  127. <dd>1.7</dd>
  128. <dt><span class="strong">See Also:</span></dt><dd><a href="http://code.google.com/p/snappy/source/browse/trunk/format_description.txt">Snappy compressed format description</a></dd></dl>
  129. </li>
  130. </ul>
  131. </div>
  132. <div class="summary">
  133. <ul class="blockList">
  134. <li class="blockList">
  135. <!-- =========== FIELD SUMMARY =========== -->
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  137. <li class="blockList"><a name="field_summary">
  138. <!-- -->
  139. </a>
  140. <h3>Field Summary</h3>
  141. <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
  142. <caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
  143. <tr>
  144. <th class="colFirst" scope="col">Modifier and Type</th>
  145. <th class="colLast" scope="col">Field and Description</th>
  146. </tr>
  147. <tr class="altColor">
  148. <td class="colFirst"><code>static int</code></td>
  149. <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#DEFAULT_BLOCK_SIZE">DEFAULT_BLOCK_SIZE</a></strong></code>
  150. <div class="block">Default block size</div>
  151. </td>
  152. </tr>
  153. </table>
  154. </li>
  155. </ul>
  156. <!-- ======== CONSTRUCTOR SUMMARY ======== -->
  157. <ul class="blockList">
  158. <li class="blockList"><a name="constructor_summary">
  159. <!-- -->
  160. </a>
  161. <h3>Constructor Summary</h3>
  162. <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
  163. <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
  164. <tr>
  165. <th class="colOne" scope="col">Constructor and Description</th>
  166. </tr>
  167. <tr class="altColor">
  168. <td class="colOne"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#SnappyCompressorInputStream(java.io.InputStream)">SnappyCompressorInputStream</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;is)</code>
  169. <div class="block">Constructor using the default buffer size of 32k.</div>
  170. </td>
  171. </tr>
  172. <tr class="rowColor">
  173. <td class="colOne"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#SnappyCompressorInputStream(java.io.InputStream,%20int)">SnappyCompressorInputStream</a></strong>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;is,
  174. int&nbsp;blockSize)</code>
  175. <div class="block">Constructor using a configurable buffer size.</div>
  176. </td>
  177. </tr>
  178. </table>
  179. </li>
  180. </ul>
  181. <!-- ========== METHOD SUMMARY =========== -->
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  186. <h3>Method Summary</h3>
  187. <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
  188. <caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
  189. <tr>
  190. <th class="colFirst" scope="col">Modifier and Type</th>
  191. <th class="colLast" scope="col">Method and Description</th>
  192. </tr>
  193. <tr class="altColor">
  194. <td class="colFirst"><code>int</code></td>
  195. <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#available()">available</a></strong>()</code></td>
  196. </tr>
  197. <tr class="rowColor">
  198. <td class="colFirst"><code>void</code></td>
  199. <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#close()">close</a></strong>()</code></td>
  200. </tr>
  201. <tr class="altColor">
  202. <td class="colFirst"><code>int</code></td>
  203. <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#getSize()">getSize</a></strong>()</code>
  204. <div class="block">Get the uncompressed size of the stream</div>
  205. </td>
  206. </tr>
  207. <tr class="rowColor">
  208. <td class="colFirst"><code>int</code></td>
  209. <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#read()">read</a></strong>()</code></td>
  210. </tr>
  211. <tr class="altColor">
  212. <td class="colFirst"><code>int</code></td>
  213. <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#read(byte[],%20int,%20int)">read</a></strong>(byte[]&nbsp;b,
  214. int&nbsp;off,
  215. int&nbsp;len)</code></td>
  216. </tr>
  217. </table>
  218. <ul class="blockList">
  219. <li class="blockList"><a name="methods_inherited_from_class_org.apache.commons.compress.compressors.CompressorInputStream">
  220. <!-- -->
  221. </a>
  222. <h3>Methods inherited from class&nbsp;org.apache.commons.compress.compressors.<a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html" title="class in org.apache.commons.compress.compressors">CompressorInputStream</a></h3>
  223. <code><a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html#count(int)">count</a>, <a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html#count(long)">count</a>, <a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html#getBytesRead()">getBytesRead</a>, <a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html#getCount()">getCount</a>, <a href="../../../../../../org/apache/commons/compress/compressors/CompressorInputStream.html#pushedBackBytes(long)">pushedBackBytes</a></code></li>
  224. </ul>
  225. <ul class="blockList">
  226. <li class="blockList"><a name="methods_inherited_from_class_java.io.InputStream">
  227. <!-- -->
  228. </a>
  229. <h3>Methods inherited from class&nbsp;java.io.<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></h3>
  230. <code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true#mark(int)" title="class or interface in java.io">mark</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true#markSupported()" title="class or interface in java.io">markSupported</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true#read(byte[])" title="class or interface in java.io">read</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true#reset()" title="class or interface in java.io">reset</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true#skip(long)" title="class or interface in java.io">skip</a></code></li>
  231. </ul>
  232. <ul class="blockList">
  233. <li class="blockList"><a name="methods_inherited_from_class_java.lang.Object">
  234. <!-- -->
  235. </a>
  236. <h3>Methods inherited from class&nbsp;java.lang.<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
  237. <code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait(long,%20int)" title="class or interface in java.lang">wait</a></code></li>
  238. </ul>
  239. </li>
  240. </ul>
  241. </li>
  242. </ul>
  243. </div>
  244. <div class="details">
  245. <ul class="blockList">
  246. <li class="blockList">
  247. <!-- ============ FIELD DETAIL =========== -->
  248. <ul class="blockList">
  249. <li class="blockList"><a name="field_detail">
  250. <!-- -->
  251. </a>
  252. <h3>Field Detail</h3>
  253. <a name="DEFAULT_BLOCK_SIZE">
  254. <!-- -->
  255. </a>
  256. <ul class="blockListLast">
  257. <li class="blockList">
  258. <h4>DEFAULT_BLOCK_SIZE</h4>
  259. <pre>public static final&nbsp;int <a href="../../../../../../src-html/org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#line.47">DEFAULT_BLOCK_SIZE</a></pre>
  260. <div class="block">Default block size</div>
  261. <dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../constant-values.html#org.apache.commons.compress.compressors.snappy.SnappyCompressorInputStream.DEFAULT_BLOCK_SIZE">Constant Field Values</a></dd></dl>
  262. </li>
  263. </ul>
  264. </li>
  265. </ul>
  266. <!-- ========= CONSTRUCTOR DETAIL ======== -->
  267. <ul class="blockList">
  268. <li class="blockList"><a name="constructor_detail">
  269. <!-- -->
  270. </a>
  271. <h3>Constructor Detail</h3>
  272. <a name="SnappyCompressorInputStream(java.io.InputStream)">
  273. <!-- -->
  274. </a>
  275. <ul class="blockList">
  276. <li class="blockList">
  277. <h4>SnappyCompressorInputStream</h4>
  278. <pre>public&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#line.83">SnappyCompressorInputStream</a>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;is)
  279. throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
  280. <div class="block">Constructor using the default buffer size of 32k.</div>
  281. <dl><dt><span class="strong">Parameters:</span></dt><dd><code>is</code> - An InputStream to read compressed data from</dd>
  282. <dt><span class="strong">Throws:</span></dt>
  283. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if reading fails</dd></dl>
  284. </li>
  285. </ul>
  286. <a name="SnappyCompressorInputStream(java.io.InputStream, int)">
  287. <!-- -->
  288. </a>
  289. <ul class="blockListLast">
  290. <li class="blockList">
  291. <h4>SnappyCompressorInputStream</h4>
  292. <pre>public&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#line.97">SnappyCompressorInputStream</a>(<a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;is,
  293. int&nbsp;blockSize)
  294. throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
  295. <div class="block">Constructor using a configurable buffer size.</div>
  296. <dl><dt><span class="strong">Parameters:</span></dt><dd><code>is</code> - An InputStream to read compressed data from</dd><dd><code>blockSize</code> - The block size used in compression</dd>
  297. <dt><span class="strong">Throws:</span></dt>
  298. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if reading fails</dd></dl>
  299. </li>
  300. </ul>
  301. </li>
  302. </ul>
  303. <!-- ============ METHOD DETAIL ========== -->
  304. <ul class="blockList">
  305. <li class="blockList"><a name="method_detail">
  306. <!-- -->
  307. </a>
  308. <h3>Method Detail</h3>
  309. <a name="read()">
  310. <!-- -->
  311. </a>
  312. <ul class="blockList">
  313. <li class="blockList">
  314. <h4>read</h4>
  315. <pre>public&nbsp;int&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#line.108">read</a>()
  316. throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
  317. <dl>
  318. <dt><strong>Specified by:</strong></dt>
  319. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true#read()" title="class or interface in java.io">read</a></code>&nbsp;in class&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></code></dd>
  320. <dt><span class="strong">Throws:</span></dt>
  321. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd></dl>
  322. </li>
  323. </ul>
  324. <a name="close()">
  325. <!-- -->
  326. </a>
  327. <ul class="blockList">
  328. <li class="blockList">
  329. <h4>close</h4>
  330. <pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#line.114">close</a>()
  331. throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
  332. <dl>
  333. <dt><strong>Specified by:</strong></dt>
  334. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true#close()" title="class or interface in java.io">close</a></code>&nbsp;in interface&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd>
  335. <dt><strong>Specified by:</strong></dt>
  336. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true#close()" title="class or interface in java.lang">close</a></code>&nbsp;in interface&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd>
  337. <dt><strong>Overrides:</strong></dt>
  338. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true#close()" title="class or interface in java.io">close</a></code>&nbsp;in class&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></code></dd>
  339. <dt><span class="strong">Throws:</span></dt>
  340. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd></dl>
  341. </li>
  342. </ul>
  343. <a name="available()">
  344. <!-- -->
  345. </a>
  346. <ul class="blockList">
  347. <li class="blockList">
  348. <h4>available</h4>
  349. <pre>public&nbsp;int&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#line.120">available</a>()</pre>
  350. <dl>
  351. <dt><strong>Overrides:</strong></dt>
  352. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true#available()" title="class or interface in java.io">available</a></code>&nbsp;in class&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></code></dd>
  353. </dl>
  354. </li>
  355. </ul>
  356. <a name="read(byte[], int, int)">
  357. <!-- -->
  358. </a>
  359. <ul class="blockList">
  360. <li class="blockList">
  361. <h4>read</h4>
  362. <pre>public&nbsp;int&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#line.128">read</a>(byte[]&nbsp;b,
  363. int&nbsp;off,
  364. int&nbsp;len)
  365. throws <a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
  366. <dl>
  367. <dt><strong>Overrides:</strong></dt>
  368. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true#read(byte[],%20int,%20int)" title="class or interface in java.io">read</a></code>&nbsp;in class&nbsp;<code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a></code></dd>
  369. <dt><span class="strong">Throws:</span></dt>
  370. <dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd></dl>
  371. </li>
  372. </ul>
  373. <a name="getSize()">
  374. <!-- -->
  375. </a>
  376. <ul class="blockListLast">
  377. <li class="blockList">
  378. <h4>getSize</h4>
  379. <pre>public&nbsp;int&nbsp;<a href="../../../../../../src-html/org/apache/commons/compress/compressors/snappy/SnappyCompressorInputStream.html#line.423">getSize</a>()</pre>
  380. <div class="block">Get the uncompressed size of the stream</div>
  381. <dl><dt><span class="strong">Returns:</span></dt><dd>the uncompressed size</dd></dl>
  382. </li>
  383. </ul>
  384. </li>
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