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7CBZip2OutputStream (Hadoop 0.20.1 API)
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79  SUMMARY:&nbsp;NESTED&nbsp;|&nbsp;<A HREF="#field_summary">FIELD</A>&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
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91org.apache.hadoop.io.compress.bzip2</FONT>
92<BR>
93Class CBZip2OutputStream</H2>
94<PRE>
95<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
96  <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">java.io.OutputStream</A>
97      <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream</B>
98</PRE>
99<DL>
100<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/io/Flushable.html?is-external=true" title="class or interface in java.io">Flushable</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html" title="interface in org.apache.hadoop.io.compress.bzip2">BZip2Constants</A></DD>
101</DL>
102<HR>
103<DL>
104<DT><PRE>public class <B>CBZip2OutputStream</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</A><DT>implements <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html" title="interface in org.apache.hadoop.io.compress.bzip2">BZip2Constants</A></DL>
105</PRE>
106
107<P>
108An output stream that compresses into the BZip2 format (without the file
109 header chars) into another stream.
110
111 <p>
112 The compression requires large amounts of memory. Thus you should call the
113 <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#close()"><CODE>close()</CODE></A> method as soon as possible, to force
114 <tt>CBZip2OutputStream</tt> to release the allocated memory.
115 </p>
116
117 <p>
118 You can shrink the amount of allocated memory and maybe raise the compression
119 speed by choosing a lower blocksize, which in turn may cause a lower
120 compression ratio. You can avoid unnecessary memory allocation by avoiding
121 using a blocksize which is bigger than the size of the input.
122 </p>
123
124 <p>
125 You can compute the memory usage for compressing by the following formula:
126 </p>
127
128 <pre>
129 &lt;code&gt;400k + (9 * blocksize)&lt;/code&gt;.
130 </pre>
131
132 <p>
133 To get the memory required for decompression by <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2InputStream.html" title="class in org.apache.hadoop.io.compress.bzip2"><CODE>CBZip2InputStream</CODE></A> use
134 </p>
135
136 <pre>
137 &lt;code&gt;65k + (5 * blocksize)&lt;/code&gt;.
138 </pre>
139
140 <table width="100%" border="1">
141 <colgroup> <col width="33%" /> <col width="33%" /> <col width="33%" />
142 </colgroup>
143 <tr>
144 <th colspan="3">Memory usage by blocksize</th>
145 </tr>
146 <tr>
147 <th align="right">Blocksize</th> <th align="right">Compression<br>
148 memory usage</th> <th align="right">Decompression<br>
149 memory usage</th>
150 </tr>
151 <tr>
152 <td align="right">100k</td>
153 <td align="right">1300k</td>
154 <td align="right">565k</td>
155 </tr>
156 <tr>
157 <td align="right">200k</td>
158 <td align="right">2200k</td>
159 <td align="right">1065k</td>
160 </tr>
161 <tr>
162 <td align="right">300k</td>
163 <td align="right">3100k</td>
164 <td align="right">1565k</td>
165 </tr>
166 <tr>
167 <td align="right">400k</td>
168 <td align="right">4000k</td>
169 <td align="right">2065k</td>
170 </tr>
171 <tr>
172 <td align="right">500k</td>
173 <td align="right">4900k</td>
174 <td align="right">2565k</td>
175 </tr>
176 <tr>
177 <td align="right">600k</td>
178 <td align="right">5800k</td>
179 <td align="right">3065k</td>
180 </tr>
181 <tr>
182 <td align="right">700k</td>
183 <td align="right">6700k</td>
184 <td align="right">3565k</td>
185 </tr>
186 <tr>
187 <td align="right">800k</td>
188 <td align="right">7600k</td>
189 <td align="right">4065k</td>
190 </tr>
191 <tr>
192 <td align="right">900k</td>
193 <td align="right">8500k</td>
194 <td align="right">4565k</td>
195 </tr>
196 </table>
197
198 <p>
199 For decompression <tt>CBZip2InputStream</tt> allocates less memory if the
200 bzipped input is smaller than one block.
201 </p>
202
203 <p>
204 Instances of this class are not threadsafe.
205 </p>
206
207 <p>
208 TODO: Update to BZip2 1.0.1
209 </p>
210<P>
211
212<P>
213<HR>
214
215<P>
216<!-- =========== FIELD SUMMARY =========== -->
217
218<A NAME="field_summary"><!-- --></A>
219<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
220<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
221<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
222<B>Field Summary</B></FONT></TH>
223</TR>
224<TR BGCOLOR="white" CLASS="TableRowColor">
225<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
226<CODE>protected static&nbsp;int</CODE></FONT></TD>
227<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#CLEARMASK">CLEARMASK</A></B></CODE>
228
229<BR>
230&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This constant is accessible by subclasses for historical purposes.</TD>
231</TR>
232<TR BGCOLOR="white" CLASS="TableRowColor">
233<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
234<CODE>protected static&nbsp;int</CODE></FONT></TD>
235<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#DEPTH_THRESH">DEPTH_THRESH</A></B></CODE>
236
237<BR>
238&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This constant is accessible by subclasses for historical purposes.</TD>
239</TR>
240<TR BGCOLOR="white" CLASS="TableRowColor">
241<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
242<CODE>protected static&nbsp;int</CODE></FONT></TD>
243<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#GREATER_ICOST">GREATER_ICOST</A></B></CODE>
244
245<BR>
246&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This constant is accessible by subclasses for historical purposes.</TD>
247</TR>
248<TR BGCOLOR="white" CLASS="TableRowColor">
249<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
250<CODE>protected static&nbsp;int</CODE></FONT></TD>
251<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#LESSER_ICOST">LESSER_ICOST</A></B></CODE>
252
253<BR>
254&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This constant is accessible by subclasses for historical purposes.</TD>
255</TR>
256<TR BGCOLOR="white" CLASS="TableRowColor">
257<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
258<CODE>static&nbsp;int</CODE></FONT></TD>
259<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#MAX_BLOCKSIZE">MAX_BLOCKSIZE</A></B></CODE>
260
261<BR>
262&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The maximum supported blocksize <tt> == 9</tt>.</TD>
263</TR>
264<TR BGCOLOR="white" CLASS="TableRowColor">
265<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
266<CODE>static&nbsp;int</CODE></FONT></TD>
267<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#MIN_BLOCKSIZE">MIN_BLOCKSIZE</A></B></CODE>
268
269<BR>
270&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The minimum supported blocksize <tt> == 1</tt>.</TD>
271</TR>
272<TR BGCOLOR="white" CLASS="TableRowColor">
273<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
274<CODE>protected static&nbsp;int</CODE></FONT></TD>
275<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#QSORT_STACK_SIZE">QSORT_STACK_SIZE</A></B></CODE>
276
277<BR>
278&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This constant is accessible by subclasses for historical purposes.</TD>
279</TR>
280<TR BGCOLOR="white" CLASS="TableRowColor">
281<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
282<CODE>protected static&nbsp;int</CODE></FONT></TD>
283<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#SETMASK">SETMASK</A></B></CODE>
284
285<BR>
286&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This constant is accessible by subclasses for historical purposes.</TD>
287</TR>
288<TR BGCOLOR="white" CLASS="TableRowColor">
289<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
290<CODE>protected static&nbsp;int</CODE></FONT></TD>
291<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#SMALL_THRESH">SMALL_THRESH</A></B></CODE>
292
293<BR>
294&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This constant is accessible by subclasses for historical purposes.</TD>
295</TR>
296<TR BGCOLOR="white" CLASS="TableRowColor">
297<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
298<CODE>protected static&nbsp;int</CODE></FONT></TD>
299<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#WORK_FACTOR">WORK_FACTOR</A></B></CODE>
300
301<BR>
302&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This constant is accessible by subclasses for historical purposes.</TD>
303</TR>
304</TABLE>
305&nbsp;<A NAME="fields_inherited_from_class_org.apache.hadoop.io.compress.bzip2.BZip2Constants"><!-- --></A>
306<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
307<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
308<TH ALIGN="left"><B>Fields inherited from interface org.apache.hadoop.io.compress.bzip2.<A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html" title="interface in org.apache.hadoop.io.compress.bzip2">BZip2Constants</A></B></TH>
309</TR>
310<TR BGCOLOR="white" CLASS="TableRowColor">
311<TD><CODE><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#baseBlockSize">baseBlockSize</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#G_SIZE">G_SIZE</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#MAX_ALPHA_SIZE">MAX_ALPHA_SIZE</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#MAX_CODE_LEN">MAX_CODE_LEN</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#MAX_SELECTORS">MAX_SELECTORS</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#N_GROUPS">N_GROUPS</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#N_ITERS">N_ITERS</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#NUM_OVERSHOOT_BYTES">NUM_OVERSHOOT_BYTES</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#rNums">rNums</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#RUNA">RUNA</A>, <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/BZip2Constants.html#RUNB">RUNB</A></CODE></TD>
312</TR>
313</TABLE>
314&nbsp;
315<!-- ======== CONSTRUCTOR SUMMARY ======== -->
316
317<A NAME="constructor_summary"><!-- --></A>
318<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
319<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
320<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
321<B>Constructor Summary</B></FONT></TH>
322</TR>
323<TR BGCOLOR="white" CLASS="TableRowColor">
324<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#CBZip2OutputStream(java.io.OutputStream)">CBZip2OutputStream</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</A>&nbsp;out)</CODE>
325
326<BR>
327&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new <tt>CBZip2OutputStream</tt> with a blocksize of 900k.</TD>
328</TR>
329<TR BGCOLOR="white" CLASS="TableRowColor">
330<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#CBZip2OutputStream(java.io.OutputStream, int)">CBZip2OutputStream</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</A>&nbsp;out,
331                   int&nbsp;blockSize)</CODE>
332
333<BR>
334&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new <tt>CBZip2OutputStream</tt> with specified blocksize.</TD>
335</TR>
336</TABLE>
337&nbsp;
338<!-- ========== METHOD SUMMARY =========== -->
339
340<A NAME="method_summary"><!-- --></A>
341<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
342<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
343<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
344<B>Method Summary</B></FONT></TH>
345</TR>
346<TR BGCOLOR="white" CLASS="TableRowColor">
347<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
348<CODE>static&nbsp;int</CODE></FONT></TD>
349<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#chooseBlockSize(long)">chooseBlockSize</A></B>(long&nbsp;inputLength)</CODE>
350
351<BR>
352&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Chooses a blocksize based on the given length of the data to compress.</TD>
353</TR>
354<TR BGCOLOR="white" CLASS="TableRowColor">
355<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
356<CODE>&nbsp;void</CODE></FONT></TD>
357<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#close()">close</A></B>()</CODE>
358
359<BR>
360&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
361</TR>
362<TR BGCOLOR="white" CLASS="TableRowColor">
363<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
364<CODE>protected &nbsp;void</CODE></FONT></TD>
365<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#finalize()">finalize</A></B>()</CODE>
366
367<BR>
368&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Overriden to close the stream.</TD>
369</TR>
370<TR BGCOLOR="white" CLASS="TableRowColor">
371<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
372<CODE>&nbsp;void</CODE></FONT></TD>
373<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#finish()">finish</A></B>()</CODE>
374
375<BR>
376&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
377</TR>
378<TR BGCOLOR="white" CLASS="TableRowColor">
379<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
380<CODE>&nbsp;void</CODE></FONT></TD>
381<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#flush()">flush</A></B>()</CODE>
382
383<BR>
384&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
385</TR>
386<TR BGCOLOR="white" CLASS="TableRowColor">
387<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
388<CODE>&nbsp;int</CODE></FONT></TD>
389<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#getBlockSize()">getBlockSize</A></B>()</CODE>
390
391<BR>
392&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the blocksize parameter specified at construction time.</TD>
393</TR>
394<TR BGCOLOR="white" CLASS="TableRowColor">
395<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
396<CODE>protected static&nbsp;void</CODE></FONT></TD>
397<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#hbMakeCodeLengths(char[], int[], int, int)">hbMakeCodeLengths</A></B>(char[]&nbsp;len,
398                  int[]&nbsp;freq,
399                  int&nbsp;alphaSize,
400                  int&nbsp;maxLen)</CODE>
401
402<BR>
403&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This method is accessible by subclasses for historical purposes.</TD>
404</TR>
405<TR BGCOLOR="white" CLASS="TableRowColor">
406<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
407<CODE>&nbsp;void</CODE></FONT></TD>
408<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#write(byte[], int, int)">write</A></B>(byte[]&nbsp;buf,
409      int&nbsp;offs,
410      int&nbsp;len)</CODE>
411
412<BR>
413&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
414</TR>
415<TR BGCOLOR="white" CLASS="TableRowColor">
416<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
417<CODE>&nbsp;void</CODE></FONT></TD>
418<TD><CODE><B><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#write(int)">write</A></B>(int&nbsp;b)</CODE>
419
420<BR>
421&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
422</TR>
423</TABLE>
424&nbsp;<A NAME="methods_inherited_from_class_java.io.OutputStream"><!-- --></A>
425<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
426<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
427<TH ALIGN="left"><B>Methods inherited from class java.io.<A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</A></B></TH>
428</TR>
429<TR BGCOLOR="white" CLASS="TableRowColor">
430<TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true#write(byte[])" title="class or interface in java.io">write</A></CODE></TD>
431</TR>
432</TABLE>
433&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
434<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
435<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
436<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
437</TR>
438<TR BGCOLOR="white" CLASS="TableRowColor">
439<TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/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://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
440</TR>
441</TABLE>
442&nbsp;
443<P>
444
445<!-- ============ FIELD DETAIL =========== -->
446
447<A NAME="field_detail"><!-- --></A>
448<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
449<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
450<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
451<B>Field Detail</B></FONT></TH>
452</TR>
453</TABLE>
454
455<A NAME="MIN_BLOCKSIZE"><!-- --></A><H3>
456MIN_BLOCKSIZE</H3>
457<PRE>
458public static final int <B>MIN_BLOCKSIZE</B></PRE>
459<DL>
460<DD>The minimum supported blocksize <tt> == 1</tt>.
461<P>
462<DL>
463<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.MIN_BLOCKSIZE">Constant Field Values</A></DL>
464</DL>
465<HR>
466
467<A NAME="MAX_BLOCKSIZE"><!-- --></A><H3>
468MAX_BLOCKSIZE</H3>
469<PRE>
470public static final int <B>MAX_BLOCKSIZE</B></PRE>
471<DL>
472<DD>The maximum supported blocksize <tt> == 9</tt>.
473<P>
474<DL>
475<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.MAX_BLOCKSIZE">Constant Field Values</A></DL>
476</DL>
477<HR>
478
479<A NAME="SETMASK"><!-- --></A><H3>
480SETMASK</H3>
481<PRE>
482protected static final int <B>SETMASK</B></PRE>
483<DL>
484<DD>This constant is accessible by subclasses for historical purposes. If you
485 don't know what it means then you don't need it.
486<P>
487<DL>
488<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.SETMASK">Constant Field Values</A></DL>
489</DL>
490<HR>
491
492<A NAME="CLEARMASK"><!-- --></A><H3>
493CLEARMASK</H3>
494<PRE>
495protected static final int <B>CLEARMASK</B></PRE>
496<DL>
497<DD>This constant is accessible by subclasses for historical purposes. If you
498 don't know what it means then you don't need it.
499<P>
500<DL>
501<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.CLEARMASK">Constant Field Values</A></DL>
502</DL>
503<HR>
504
505<A NAME="GREATER_ICOST"><!-- --></A><H3>
506GREATER_ICOST</H3>
507<PRE>
508protected static final int <B>GREATER_ICOST</B></PRE>
509<DL>
510<DD>This constant is accessible by subclasses for historical purposes. If you
511 don't know what it means then you don't need it.
512<P>
513<DL>
514<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.GREATER_ICOST">Constant Field Values</A></DL>
515</DL>
516<HR>
517
518<A NAME="LESSER_ICOST"><!-- --></A><H3>
519LESSER_ICOST</H3>
520<PRE>
521protected static final int <B>LESSER_ICOST</B></PRE>
522<DL>
523<DD>This constant is accessible by subclasses for historical purposes. If you
524 don't know what it means then you don't need it.
525<P>
526<DL>
527<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.LESSER_ICOST">Constant Field Values</A></DL>
528</DL>
529<HR>
530
531<A NAME="SMALL_THRESH"><!-- --></A><H3>
532SMALL_THRESH</H3>
533<PRE>
534protected static final int <B>SMALL_THRESH</B></PRE>
535<DL>
536<DD>This constant is accessible by subclasses for historical purposes. If you
537 don't know what it means then you don't need it.
538<P>
539<DL>
540<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.SMALL_THRESH">Constant Field Values</A></DL>
541</DL>
542<HR>
543
544<A NAME="DEPTH_THRESH"><!-- --></A><H3>
545DEPTH_THRESH</H3>
546<PRE>
547protected static final int <B>DEPTH_THRESH</B></PRE>
548<DL>
549<DD>This constant is accessible by subclasses for historical purposes. If you
550 don't know what it means then you don't need it.
551<P>
552<DL>
553<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.DEPTH_THRESH">Constant Field Values</A></DL>
554</DL>
555<HR>
556
557<A NAME="WORK_FACTOR"><!-- --></A><H3>
558WORK_FACTOR</H3>
559<PRE>
560protected static final int <B>WORK_FACTOR</B></PRE>
561<DL>
562<DD>This constant is accessible by subclasses for historical purposes. If you
563 don't know what it means then you don't need it.
564<P>
565<DL>
566<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.WORK_FACTOR">Constant Field Values</A></DL>
567</DL>
568<HR>
569
570<A NAME="QSORT_STACK_SIZE"><!-- --></A><H3>
571QSORT_STACK_SIZE</H3>
572<PRE>
573protected static final int <B>QSORT_STACK_SIZE</B></PRE>
574<DL>
575<DD>This constant is accessible by subclasses for historical purposes. If you
576 don't know what it means then you don't need it.
577 <p>
578 If you are ever unlucky/improbable enough to get a stack overflow whilst
579 sorting, increase the following constant and try again. In practice I
580 have never seen the stack go above 27 elems, so the following limit seems
581 very generous.
582 </p>
583<P>
584<DL>
585<DT><B>See Also:</B><DD><A HREF="../../../../../../constant-values.html#org.apache.hadoop.io.compress.bzip2.CBZip2OutputStream.QSORT_STACK_SIZE">Constant Field Values</A></DL>
586</DL>
587
588<!-- ========= CONSTRUCTOR DETAIL ======== -->
589
590<A NAME="constructor_detail"><!-- --></A>
591<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
592<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
593<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
594<B>Constructor Detail</B></FONT></TH>
595</TR>
596</TABLE>
597
598<A NAME="CBZip2OutputStream(java.io.OutputStream)"><!-- --></A><H3>
599CBZip2OutputStream</H3>
600<PRE>
601public <B>CBZip2OutputStream</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</A>&nbsp;out)
602                   throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
603<DL>
604<DD>Constructs a new <tt>CBZip2OutputStream</tt> with a blocksize of 900k.
605
606 <p>
607 <b>Attention: </b>The caller is resonsible to write the two BZip2 magic
608 bytes <tt>"BZ"</tt> to the specified stream prior to calling this
609 constructor.
610 </p>
611<P>
612<DL>
613<DT><B>Parameters:</B><DD><CODE>out</CODE> - *
614            the destination stream.
615<DT><B>Throws:</B>
616<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE> - if an I/O error occurs in the specified stream.
617<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</A></CODE> - if <code>out == null</code>.</DL>
618</DL>
619<HR>
620
621<A NAME="CBZip2OutputStream(java.io.OutputStream, int)"><!-- --></A><H3>
622CBZip2OutputStream</H3>
623<PRE>
624public <B>CBZip2OutputStream</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</A>&nbsp;out,
625                          int&nbsp;blockSize)
626                   throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
627<DL>
628<DD>Constructs a new <tt>CBZip2OutputStream</tt> with specified blocksize.
629
630 <p>
631 <b>Attention: </b>The caller is resonsible to write the two BZip2 magic
632 bytes <tt>"BZ"</tt> to the specified stream prior to calling this
633 constructor.
634 </p>
635<P>
636<DL>
637<DT><B>Parameters:</B><DD><CODE>out</CODE> - the destination stream.<DD><CODE>blockSize</CODE> - the blockSize as 100k units.
638<DT><B>Throws:</B>
639<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE> - if an I/O error occurs in the specified stream.
640<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <code>(blockSize < 1) || (blockSize > 9)</code>.
641<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</A></CODE> - if <code>out == null</code>.<DT><B>See Also:</B><DD><A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#MIN_BLOCKSIZE"><CODE>MIN_BLOCKSIZE</CODE></A>,
642<A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#MAX_BLOCKSIZE"><CODE>MAX_BLOCKSIZE</CODE></A></DL>
643</DL>
644
645<!-- ============ METHOD DETAIL ========== -->
646
647<A NAME="method_detail"><!-- --></A>
648<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
649<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
650<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
651<B>Method Detail</B></FONT></TH>
652</TR>
653</TABLE>
654
655<A NAME="hbMakeCodeLengths(char[], int[], int, int)"><!-- --></A><H3>
656hbMakeCodeLengths</H3>
657<PRE>
658protected static void <B>hbMakeCodeLengths</B>(char[]&nbsp;len,
659                                        int[]&nbsp;freq,
660                                        int&nbsp;alphaSize,
661                                        int&nbsp;maxLen)</PRE>
662<DL>
663<DD>This method is accessible by subclasses for historical purposes. If you
664 don't know what it does then you don't need it.
665<P>
666<DD><DL>
667</DL>
668</DD>
669<DD><DL>
670</DL>
671</DD>
672</DL>
673<HR>
674
675<A NAME="chooseBlockSize(long)"><!-- --></A><H3>
676chooseBlockSize</H3>
677<PRE>
678public static int <B>chooseBlockSize</B>(long&nbsp;inputLength)</PRE>
679<DL>
680<DD>Chooses a blocksize based on the given length of the data to compress.
681<P>
682<DD><DL>
683</DL>
684</DD>
685<DD><DL>
686<DT><B>Parameters:</B><DD><CODE>inputLength</CODE> - The length of the data which will be compressed by
687            <tt>CBZip2OutputStream</tt>.
688<DT><B>Returns:</B><DD>The blocksize, between <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#MIN_BLOCKSIZE"><CODE>MIN_BLOCKSIZE</CODE></A> and
689         <A HREF="../../../../../../org/apache/hadoop/io/compress/bzip2/CBZip2OutputStream.html#MAX_BLOCKSIZE"><CODE>MAX_BLOCKSIZE</CODE></A> both inclusive. For a negative
690         <tt>inputLength</tt> this method returns <tt>MAX_BLOCKSIZE</tt>
691         always.</DL>
692</DD>
693</DL>
694<HR>
695
696<A NAME="write(int)"><!-- --></A><H3>
697write</H3>
698<PRE>
699public void <B>write</B>(int&nbsp;b)
700           throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
701<DL>
702<DD><DL>
703<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true#write(int)" title="class or interface in java.io">write</A></CODE> in class <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</A></CODE></DL>
704</DD>
705<DD><DL>
706
707<DT><B>Throws:</B>
708<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
709</DD>
710</DL>
711<HR>
712
713<A NAME="finalize()"><!-- --></A><H3>
714finalize</H3>
715<PRE>
716protected void <B>finalize</B>()
717                 throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</A></PRE>
718<DL>
719<DD>Overriden to close the stream.
720<P>
721<DD><DL>
722<DT><B>Overrides:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A></CODE> in class <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></DL>
723</DD>
724<DD><DL>
725
726<DT><B>Throws:</B>
727<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</A></CODE></DL>
728</DD>
729</DL>
730<HR>
731
732<A NAME="finish()"><!-- --></A><H3>
733finish</H3>
734<PRE>
735public void <B>finish</B>()
736            throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
737<DL>
738<DD><DL>
739</DL>
740</DD>
741<DD><DL>
742
743<DT><B>Throws:</B>
744<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
745</DD>
746</DL>
747<HR>
748
749<A NAME="close()"><!-- --></A><H3>
750close</H3>
751<PRE>
752public void <B>close</B>()
753           throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
754<DL>
755<DD><DL>
756<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true#close()" title="class or interface in java.io">close</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true#close()" title="class or interface in java.io">close</A></CODE> in class <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</A></CODE></DL>
757</DD>
758<DD><DL>
759
760<DT><B>Throws:</B>
761<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
762</DD>
763</DL>
764<HR>
765
766<A NAME="flush()"><!-- --></A><H3>
767flush</H3>
768<PRE>
769public void <B>flush</B>()
770           throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
771<DL>
772<DD><DL>
773<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Flushable.html?is-external=true#flush()" title="class or interface in java.io">flush</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/Flushable.html?is-external=true" title="class or interface in java.io">Flushable</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true#flush()" title="class or interface in java.io">flush</A></CODE> in class <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</A></CODE></DL>
774</DD>
775<DD><DL>
776
777<DT><B>Throws:</B>
778<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL>
779</DD>
780</DL>
781<HR>
782
783<A NAME="getBlockSize()"><!-- --></A><H3>
784getBlockSize</H3>
785<PRE>
786public final int <B>getBlockSize</B>()</PRE>
787<DL>
788<DD>Returns the blocksize parameter specified at construction time.
789<P>
790<DD><DL>
791</DL>
792</DD>
793<DD><DL>
794</DL>
795</DD>
796</DL>
797<HR>
798
799<A NAME="write(byte[], int, int)"><!-- --></A><H3>
800write</H3>
801<PRE>
802public void <B>write</B>(byte[]&nbsp;buf,
803                  int&nbsp;offs,
804                  int&nbsp;len)
805           throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE>
806<DL>
807<DD><DL>
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811
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