1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<!--NewPage--> 3<HTML> 4<HEAD> 5<!-- Generated by javadoc (build 1.6.0-google-internal) on Mon Jan 04 20:47:59 PST 2010 --> 6<TITLE> 7FileBackedOutputStream (Guava Libraries 2010.01.04) 8</TITLE> 9 10<META NAME="date" CONTENT="2010-01-04"> 11 12<LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"> 13 14<SCRIPT type="text/javascript"> 15function windowTitle() 16{ 17 if (location.href.indexOf('is-external=true') == -1) { 18 parent.document.title="FileBackedOutputStream (Guava Libraries 2010.01.04)"; 19 } 20} 21</SCRIPT> 22<NOSCRIPT> 23</NOSCRIPT> 24 25</HEAD> 26 27<BODY BGCOLOR="white" onload="windowTitle();"> 28<HR> 29 30 31<!-- ========= START OF TOP NAVBAR ======= --> 32<A NAME="navbar_top"><!-- --></A> 33<A HREF="#skip-navbar_top" title="Skip navigation links"></A> 34<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> 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FRAMES</B></A> 63 <SCRIPT type="text/javascript"> 64 <!-- 65 if(window==top) { 66 document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); 67 } 68 //--> 69</SCRIPT> 70<NOSCRIPT> 71 <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A> 72</NOSCRIPT> 73 74 75</FONT></TD> 76</TR> 77<TR> 78<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 79 SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> 80<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 81DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> 82</TR> 83</TABLE> 84<A NAME="skip-navbar_top"></A> 85<!-- ========= END OF TOP NAVBAR ========= --> 86 87<HR> 88<!-- ======== START OF CLASS DATA ======== --> 89<H2> 90<FONT SIZE="-1"> 91com.google.common.io</FONT> 92<BR> 93Class FileBackedOutputStream</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>com.google.common.io.FileBackedOutputStream</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></DD> 101</DL> 102<HR> 103<DL> 104<DT><PRE>public final class <B>FileBackedOutputStream</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></DL> 105</PRE> 106 107<P> 108An <A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io"><CODE>OutputStream</CODE></A> that starts buffering to a byte array, but 109 switches to file buffering once the data reaches a configurable size. 110 111 <p>This class is thread-safe. 112<P> 113 114<P> 115<DL> 116<DT><B>Since:</B></DT> 117 <DD>2009.09.15 <b>tentative</b></DD> 118<DT><B>Author:</B></DT> 119 <DD>Chris Nokleberg</DD> 120</DL> 121<HR> 122 123<P> 124 125<!-- ======== CONSTRUCTOR SUMMARY ======== --> 126 127<A NAME="constructor_summary"><!-- --></A> 128<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 129<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 130<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> 131<B>Constructor Summary</B></FONT></TH> 132</TR> 133<TR BGCOLOR="white" CLASS="TableRowColor"> 134<TD><CODE><B><A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#FileBackedOutputStream(int)">FileBackedOutputStream</A></B>(int fileThreshold)</CODE> 135 136<BR> 137 Creates a new instance that uses the given file threshold.</TD> 138</TR> 139<TR BGCOLOR="white" CLASS="TableRowColor"> 140<TD><CODE><B><A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#FileBackedOutputStream(int, boolean)">FileBackedOutputStream</A></B>(int fileThreshold, 141 boolean resetOnFinalize)</CODE> 142 143<BR> 144 Creates a new instance that uses the given file threshold, and 145 optionally resets the data when the <A HREF="../../../../com/google/common/io/InputSupplier.html" title="interface in com.google.common.io"><CODE>InputSupplier</CODE></A> returned 146 by <A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#getSupplier()"><CODE>getSupplier()</CODE></A> is finalized.</TD> 147</TR> 148</TABLE> 149 150<!-- ========== METHOD SUMMARY =========== --> 151 152<A NAME="method_summary"><!-- --></A> 153<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 154<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 155<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> 156<B>Method Summary</B></FONT></TH> 157</TR> 158<TR BGCOLOR="white" CLASS="TableRowColor"> 159<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 160<CODE> void</CODE></FONT></TD> 161<TD><CODE><B><A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#close()">close</A></B>()</CODE> 162 163<BR> 164 </TD> 165</TR> 166<TR BGCOLOR="white" CLASS="TableRowColor"> 167<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 168<CODE> void</CODE></FONT></TD> 169<TD><CODE><B><A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#flush()">flush</A></B>()</CODE> 170 171<BR> 172 </TD> 173</TR> 174<TR BGCOLOR="white" CLASS="TableRowColor"> 175<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 176<CODE> <A HREF="../../../../com/google/common/io/InputSupplier.html" title="interface in com.google.common.io">InputSupplier</A><<A HREF="http://java.sun.com/javase/6/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</A>></CODE></FONT></TD> 177<TD><CODE><B><A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#getSupplier()">getSupplier</A></B>()</CODE> 178 179<BR> 180 Returns a supplier that may be used to retrieve the data buffered 181 by this stream.</TD> 182</TR> 183<TR BGCOLOR="white" CLASS="TableRowColor"> 184<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 185<CODE> void</CODE></FONT></TD> 186<TD><CODE><B><A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#reset()">reset</A></B>()</CODE> 187 188<BR> 189 Calls <A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#close()"><CODE>close()</CODE></A> if not already closed, and then resets this 190 object back to its initial state, for reuse.</TD> 191</TR> 192<TR BGCOLOR="white" CLASS="TableRowColor"> 193<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 194<CODE> void</CODE></FONT></TD> 195<TD><CODE><B><A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#write(byte[])">write</A></B>(byte[] b)</CODE> 196 197<BR> 198 </TD> 199</TR> 200<TR BGCOLOR="white" CLASS="TableRowColor"> 201<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 202<CODE> void</CODE></FONT></TD> 203<TD><CODE><B><A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#write(byte[], int, int)">write</A></B>(byte[] b, 204 int off, 205 int len)</CODE> 206 207<BR> 208 </TD> 209</TR> 210<TR BGCOLOR="white" CLASS="TableRowColor"> 211<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 212<CODE> void</CODE></FONT></TD> 213<TD><CODE><B><A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#write(int)">write</A></B>(int b)</CODE> 214 215<BR> 216 </TD> 217</TR> 218</TABLE> 219 <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> 220<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 221<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> 222<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> 223</TR> 224<TR BGCOLOR="white" CLASS="TableRowColor"> 225<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#finalize()" title="class or interface in java.lang">finalize</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> 226</TR> 227</TABLE> 228 229<P> 230 231<!-- ========= CONSTRUCTOR DETAIL ======== --> 232 233<A NAME="constructor_detail"><!-- --></A> 234<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 235<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 236<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> 237<B>Constructor Detail</B></FONT></TH> 238</TR> 239</TABLE> 240 241<A NAME="FileBackedOutputStream(int)"><!-- --></A><H3> 242FileBackedOutputStream</H3> 243<PRE> 244public <B>FileBackedOutputStream</B>(int fileThreshold)</PRE> 245<DL> 246<DD>Creates a new instance that uses the given file threshold. 247 Equivalent to <code>ThresholdOutputStream(fileThreshold, false)</code>. 248<P> 249<DL> 250<DT><B>Parameters:</B><DD><CODE>fileThreshold</CODE> - the number of bytes before the stream should 251 switch to buffering to a file</DL> 252</DL> 253<HR> 254 255<A NAME="FileBackedOutputStream(int, boolean)"><!-- --></A><H3> 256FileBackedOutputStream</H3> 257<PRE> 258public <B>FileBackedOutputStream</B>(int fileThreshold, 259 boolean resetOnFinalize)</PRE> 260<DL> 261<DD>Creates a new instance that uses the given file threshold, and 262 optionally resets the data when the <A HREF="../../../../com/google/common/io/InputSupplier.html" title="interface in com.google.common.io"><CODE>InputSupplier</CODE></A> returned 263 by <A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#getSupplier()"><CODE>getSupplier()</CODE></A> is finalized. 264<P> 265<DL> 266<DT><B>Parameters:</B><DD><CODE>fileThreshold</CODE> - the number of bytes before the stream should 267 switch to buffering to a file<DD><CODE>resetOnFinalize</CODE> - if true, the <A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#reset()"><CODE>reset()</CODE></A> method will 268 be called when the <A HREF="../../../../com/google/common/io/InputSupplier.html" title="interface in com.google.common.io"><CODE>InputSupplier</CODE></A> returned by <A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#getSupplier()"><CODE>getSupplier()</CODE></A> 269 is finalized</DL> 270</DL> 271 272<!-- ============ METHOD DETAIL ========== --> 273 274<A NAME="method_detail"><!-- --></A> 275<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 276<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 277<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> 278<B>Method Detail</B></FONT></TH> 279</TR> 280</TABLE> 281 282<A NAME="getSupplier()"><!-- --></A><H3> 283getSupplier</H3> 284<PRE> 285public <A HREF="../../../../com/google/common/io/InputSupplier.html" title="interface in com.google.common.io">InputSupplier</A><<A HREF="http://java.sun.com/javase/6/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</A>> <B>getSupplier</B>()</PRE> 286<DL> 287<DD>Returns a supplier that may be used to retrieve the data buffered 288 by this stream. 289<P> 290<DD><DL> 291</DL> 292</DD> 293</DL> 294<HR> 295 296<A NAME="reset()"><!-- --></A><H3> 297reset</H3> 298<PRE> 299public void <B>reset</B>() 300 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> 301<DL> 302<DD>Calls <A HREF="../../../../com/google/common/io/FileBackedOutputStream.html#close()"><CODE>close()</CODE></A> if not already closed, and then resets this 303 object back to its initial state, for reuse. If data was buffered 304 to a file, it will be deleted. 305<P> 306<DD><DL> 307 308<DT><B>Throws:</B> 309<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 occurred while deleting the file buffer</DL> 310</DD> 311</DL> 312<HR> 313 314<A NAME="write(int)"><!-- --></A><H3> 315write</H3> 316<PRE> 317public void <B>write</B>(int b) 318 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> 319<DL> 320<DD><DL> 321<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> 322</DD> 323<DD><DL> 324 325<DT><B>Throws:</B> 326<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> 327</DD> 328</DL> 329<HR> 330 331<A NAME="write(byte[])"><!-- --></A><H3> 332write</H3> 333<PRE> 334public void <B>write</B>(byte[] b) 335 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> 336<DL> 337<DD><DL> 338<DT><B>Overrides:</B><DD><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> 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> 339</DD> 340<DD><DL> 341 342<DT><B>Throws:</B> 343<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> 344</DD> 345</DL> 346<HR> 347 348<A NAME="write(byte[], int, int)"><!-- --></A><H3> 349write</H3> 350<PRE> 351public void <B>write</B>(byte[] b, 352 int off, 353 int len) 354 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> 355<DL> 356<DD><DL> 357<DT><B>Overrides:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true#write(byte[], int, 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> 358</DD> 359<DD><DL> 360 361<DT><B>Throws:</B> 362<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> 363</DD> 364</DL> 365<HR> 366 367<A NAME="close()"><!-- --></A><H3> 368close</H3> 369<PRE> 370public void <B>close</B>() 371 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> 372<DL> 373<DD><DL> 374<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> 375</DD> 376<DD><DL> 377 378<DT><B>Throws:</B> 379<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> 380</DD> 381</DL> 382<HR> 383 384<A NAME="flush()"><!-- --></A><H3> 385flush</H3> 386<PRE> 387public void <B>flush</B>() 388 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> 389<DL> 390<DD><DL> 391<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> 392</DD> 393<DD><DL> 394 395<DT><B>Throws:</B> 396<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> 397</DD> 398</DL> 399<!-- ========= END OF CLASS DATA ========= --> 400<HR> 401 402 403<!-- ======= START OF BOTTOM NAVBAR ====== --> 404<A NAME="navbar_bottom"><!-- --></A> 405<A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> 406<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> 407<TR> 408<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> 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