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 20:47:57 PST 2010 --> 6<TITLE> 7Throwables (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="Throwables (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=""> 35<TR> 36<TD COLSPAN=2 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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 | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD> 80<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 81DETAIL: FIELD | CONSTR | <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.base</FONT> 92<BR> 93Class Throwables</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 "><B>com.google.common.base.Throwables</B> 97</PRE> 98<HR> 99<DL> 100<DT><PRE>public final class <B>Throwables</B><DT>extends <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></DL> 101</PRE> 102 103<P> 104Static utility methods pertaining to instances of <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang"><CODE>Throwable</CODE></A>. 105<P> 106 107<P> 108<DL> 109<DT><B>Since:</B></DT> 110 <DD>2009.09.15 <b>tentative</b></DD> 111<DT><B>Author:</B></DT> 112 <DD>Kevin Bourrillion, Ben Yu</DD> 113</DL> 114<HR> 115 116<P> 117 118<!-- ========== METHOD SUMMARY =========== --> 119 120<A NAME="method_summary"><!-- --></A> 121<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 122<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 123<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> 124<B>Method Summary</B></FONT></TH> 125</TR> 126<TR BGCOLOR="white" CLASS="TableRowColor"> 127<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 128<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</A><<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></FONT></TD> 129<TD><CODE><B><A HREF="../../../../com/google/common/base/Throwables.html#getCausalChain(java.lang.Throwable)">getCausalChain</A></B>(<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> throwable)</CODE> 130 131<BR> 132 Gets a <code>Throwable</code> cause chain as a list.</TD> 133</TR> 134<TR BGCOLOR="white" CLASS="TableRowColor"> 135<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 136<CODE>static <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></FONT></TD> 137<TD><CODE><B><A HREF="../../../../com/google/common/base/Throwables.html#getRootCause(java.lang.Throwable)">getRootCause</A></B>(<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> throwable)</CODE> 138 139<BR> 140 Returns the innermost cause of <code>throwable</code>.</TD> 141</TR> 142<TR BGCOLOR="white" CLASS="TableRowColor"> 143<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 144<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD> 145<TD><CODE><B><A HREF="../../../../com/google/common/base/Throwables.html#getStackTraceAsString(java.lang.Throwable)">getStackTraceAsString</A></B>(<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> throwable)</CODE> 146 147<BR> 148 Returns a string containing the result of 149 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Throwable.html?is-external=true#toString()" title="class or interface in java.lang"><CODE>toString()</CODE></A>, followed by the full, recursive 150 stack trace of <code>throwable</code>.</TD> 151</TR> 152<TR BGCOLOR="white" CLASS="TableRowColor"> 153<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 154<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang">RuntimeException</A></CODE></FONT></TD> 155<TD><CODE><B><A HREF="../../../../com/google/common/base/Throwables.html#propagate(java.lang.Throwable)">propagate</A></B>(<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> throwable)</CODE> 156 157<BR> 158 Propagates <code>throwable</code> as-is if it is an instance of 159 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang"><CODE>RuntimeException</CODE></A> or <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Error.html?is-external=true" title="class or interface in java.lang"><CODE>Error</CODE></A>, or else as a last resort, wraps 160 it in a <code>RuntimeException</code> then propagates.</TD> 161</TR> 162<TR BGCOLOR="white" CLASS="TableRowColor"> 163<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 164<CODE>static 165<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY=""> 166<TR ALIGN="right" VALIGN=""> 167<TD NOWRAP><FONT SIZE="-1"> 168<CODE><X extends <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>> 169<BR> 170void</CODE></FONT></TD> 171</TR> 172</TABLE> 173</CODE></FONT></TD> 174<TD><CODE><B><A HREF="../../../../com/google/common/base/Throwables.html#propagateIfInstanceOf(java.lang.Throwable, java.lang.Class)">propagateIfInstanceOf</A></B>(<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> throwable, 175 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><X> declaredType)</CODE> 176 177<BR> 178 Propagates <code>throwable</code> exactly as-is, if and only if it is an 179 instance of <code>declaredType</code>.</TD> 180</TR> 181<TR BGCOLOR="white" CLASS="TableRowColor"> 182<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 183<CODE>static void</CODE></FONT></TD> 184<TD><CODE><B><A HREF="../../../../com/google/common/base/Throwables.html#propagateIfPossible(java.lang.Throwable)">propagateIfPossible</A></B>(<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> throwable)</CODE> 185 186<BR> 187 Propagates <code>throwable</code> exactly as-is, if and only if it is an 188 instance of <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang"><CODE>RuntimeException</CODE></A> or <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Error.html?is-external=true" title="class or interface in java.lang"><CODE>Error</CODE></A>.</TD> 189</TR> 190<TR BGCOLOR="white" CLASS="TableRowColor"> 191<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 192<CODE>static 193<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY=""> 194<TR ALIGN="right" VALIGN=""> 195<TD NOWRAP><FONT SIZE="-1"> 196<CODE><X extends <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>> 197<BR> 198void</CODE></FONT></TD> 199</TR> 200</TABLE> 201</CODE></FONT></TD> 202<TD><CODE><B><A HREF="../../../../com/google/common/base/Throwables.html#propagateIfPossible(java.lang.Throwable, java.lang.Class)">propagateIfPossible</A></B>(<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> throwable, 203 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><X> declaredType)</CODE> 204 205<BR> 206 Propagates <code>throwable</code> exactly as-is, if and only if it is an 207 instance of <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang"><CODE>RuntimeException</CODE></A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Error.html?is-external=true" title="class or interface in java.lang"><CODE>Error</CODE></A>, or 208 <code>declaredType</code>.</TD> 209</TR> 210<TR BGCOLOR="white" CLASS="TableRowColor"> 211<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 212<CODE>static 213<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="0" SUMMARY=""> 214<TR ALIGN="right" VALIGN=""> 215<TD NOWRAP><FONT SIZE="-1"> 216<CODE><X1 extends <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>,X2 extends <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>> 217<BR> 218void</CODE></FONT></TD> 219</TR> 220</TABLE> 221</CODE></FONT></TD> 222<TD><CODE><B><A HREF="../../../../com/google/common/base/Throwables.html#propagateIfPossible(java.lang.Throwable, java.lang.Class, java.lang.Class)">propagateIfPossible</A></B>(<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> throwable, 223 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><X1> aDeclaredType, 224 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><X2> anotherDeclaredType)</CODE> 225 226<BR> 227 Propagates <code>throwable</code> exactly as-is, if and only if it is an 228 instance of <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang"><CODE>RuntimeException</CODE></A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Error.html?is-external=true" title="class or interface in java.lang"><CODE>Error</CODE></A>, <code>aDeclaredType</code>, 229 or <code>anotherDeclaredType</code>.</TD> 230</TR> 231<TR BGCOLOR="white" CLASS="TableRowColor"> 232<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 233<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></CODE></FONT></TD> 234<TD><CODE><B><A HREF="../../../../com/google/common/base/Throwables.html#throwCause(java.lang.Exception, boolean)">throwCause</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A> exception, 235 boolean combineStackTraces)</CODE> 236 237<BR> 238 Rethrows the cause exception of a given throwable, discarding the original 239 throwable.</TD> 240</TR> 241</TABLE> 242 <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> 243<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 244<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> 245<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> 246</TR> 247<TR BGCOLOR="white" CLASS="TableRowColor"> 248<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> 249</TR> 250</TABLE> 251 252<P> 253 254<!-- ============ METHOD DETAIL ========== --> 255 256<A NAME="method_detail"><!-- --></A> 257<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 258<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 259<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> 260<B>Method Detail</B></FONT></TH> 261</TR> 262</TABLE> 263 264<A NAME="propagateIfInstanceOf(java.lang.Throwable, java.lang.Class)"><!-- --></A><H3> 265propagateIfInstanceOf</H3> 266<PRE> 267public static <X extends <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>> void <B>propagateIfInstanceOf</B>(<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> throwable, 268 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><X> declaredType) 269 throws X extends <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> 270<DL> 271<DD>Propagates <code>throwable</code> exactly as-is, if and only if it is an 272 instance of <code>declaredType</code>. Example usage: 273 <pre> 274 try { 275 someMethodThatCouldThrowAnything(); 276 } catch (IKnowWhatToDoWithThisException e) { 277 handle(e); 278 } catch (Throwable t) { 279 Throwables.propagateIfInstanceOf(t, IOException.class); 280 Throwables.propagateIfInstanceOf(t, SQLException.class); 281 throw Throwables.propagate(t); 282 } 283 </pre> 284<P> 285<DD><DL> 286 287<DT><B>Throws:</B> 288<DD><CODE>X extends <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> 289</DD> 290</DL> 291<HR> 292 293<A NAME="propagateIfPossible(java.lang.Throwable)"><!-- --></A><H3> 294propagateIfPossible</H3> 295<PRE> 296public static void <B>propagateIfPossible</B>(<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> throwable)</PRE> 297<DL> 298<DD>Propagates <code>throwable</code> exactly as-is, if and only if it is an 299 instance of <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang"><CODE>RuntimeException</CODE></A> or <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Error.html?is-external=true" title="class or interface in java.lang"><CODE>Error</CODE></A>. Example usage: 300 <pre> 301 try { 302 someMethodThatCouldThrowAnything(); 303 } catch (IKnowWhatToDoWithThisException e) { 304 handle(e); 305 } catch (Throwable t) { 306 Throwables.propagateIfPossible(t); 307 throw new RuntimeException("unexpected", t); 308 } 309 </pre> 310<P> 311<DD><DL> 312</DL> 313</DD> 314</DL> 315<HR> 316 317<A NAME="propagateIfPossible(java.lang.Throwable, java.lang.Class)"><!-- --></A><H3> 318propagateIfPossible</H3> 319<PRE> 320public static <X extends <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>> void <B>propagateIfPossible</B>(<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> throwable, 321 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><X> declaredType) 322 throws X extends <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> 323<DL> 324<DD>Propagates <code>throwable</code> exactly as-is, if and only if it is an 325 instance of <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang"><CODE>RuntimeException</CODE></A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Error.html?is-external=true" title="class or interface in java.lang"><CODE>Error</CODE></A>, or 326 <code>declaredType</code>. Example usage: 327 <pre> 328 try { 329 someMethodThatCouldThrowAnything(); 330 } catch (IKnowWhatToDoWithThisException e) { 331 handle(e); 332 } catch (Throwable t) { 333 Throwables.propagateIfPossible(t, OtherException.class); 334 throw new RuntimeException("unexpected", t); 335 } 336 </pre> 337<P> 338<DD><DL> 339<DT><B>Parameters:</B><DD><CODE>throwable</CODE> - the Throwable to possibly propagate<DD><CODE>declaredType</CODE> - the single checked exception type declared by the 340 calling method 341<DT><B>Throws:</B> 342<DD><CODE>X extends <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> 343</DD> 344</DL> 345<HR> 346 347<A NAME="propagateIfPossible(java.lang.Throwable, java.lang.Class, java.lang.Class)"><!-- --></A><H3> 348propagateIfPossible</H3> 349<PRE> 350public static <X1 extends <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>,X2 extends <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>> void <B>propagateIfPossible</B>(<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> throwable, 351 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><X1> aDeclaredType, 352 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</A><X2> anotherDeclaredType) 353 throws X1 extends <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>, 354 X2 extends <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> 355<DL> 356<DD>Propagates <code>throwable</code> exactly as-is, if and only if it is an 357 instance of <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang"><CODE>RuntimeException</CODE></A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Error.html?is-external=true" title="class or interface in java.lang"><CODE>Error</CODE></A>, <code>aDeclaredType</code>, 358 or <code>anotherDeclaredType</code>. In the unlikely case that you have three 359 or more declared checked exception types, you can handle them all by 360 invoking these methods repeatedly. See usage example in 361 <A HREF="../../../../com/google/common/base/Throwables.html#propagateIfPossible(java.lang.Throwable, java.lang.Class)"><CODE>propagateIfPossible(Throwable, Class)</CODE></A>. 362<P> 363<DD><DL> 364<DT><B>Parameters:</B><DD><CODE>throwable</CODE> - the Throwable to possibly propagate<DD><CODE>aDeclaredType</CODE> - any checked exception type declared by the calling 365 method<DD><CODE>anotherDeclaredType</CODE> - any other checked exception type declared by the 366 calling method 367<DT><B>Throws:</B> 368<DD><CODE>X1 extends <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> 369</DD> 370</DL> 371<HR> 372 373<A NAME="propagate(java.lang.Throwable)"><!-- --></A><H3> 374propagate</H3> 375<PRE> 376public static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang">RuntimeException</A> <B>propagate</B>(<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> throwable)</PRE> 377<DL> 378<DD>Propagates <code>throwable</code> as-is if it is an instance of 379 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/RuntimeException.html?is-external=true" title="class or interface in java.lang"><CODE>RuntimeException</CODE></A> or <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Error.html?is-external=true" title="class or interface in java.lang"><CODE>Error</CODE></A>, or else as a last resort, wraps 380 it in a <code>RuntimeException</code> then propagates. 381 <p> 382 This method always throws an exception. The <code>RuntimeException</code> return 383 type is only for client code to make Java type system happy in case a 384 return value is required by the enclosing method. Example usage: 385 <pre> 386 T doSomething() { 387 try { 388 return someMethodThatCouldThrowAnything(); 389 } catch (IKnowWhatToDoWithThisException e) { 390 return handle(e); 391 } catch (Throwable t) { 392 throw Throwables.propagate(t); 393 } 394 } 395 </pre> 396<P> 397<DD><DL> 398<DT><B>Parameters:</B><DD><CODE>throwable</CODE> - the Throwable to propagate 399<DT><B>Returns:</B><DD>nothing will ever be returned</DL> 400</DD> 401</DL> 402<HR> 403 404<A NAME="getRootCause(java.lang.Throwable)"><!-- --></A><H3> 405getRootCause</H3> 406<PRE> 407public static <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> <B>getRootCause</B>(<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> throwable)</PRE> 408<DL> 409<DD>Returns the innermost cause of <code>throwable</code>. The first throwable in a 410 chain provides context from when the error or exception was initially 411 detected. Example usage: 412 <pre> 413 assertEquals("Unable to assign a customer id", 414 Throwables.getRootCause(e).getMessage()); 415 </pre> 416<P> 417<DD><DL> 418</DL> 419</DD> 420</DL> 421<HR> 422 423<A NAME="getCausalChain(java.lang.Throwable)"><!-- --></A><H3> 424getCausalChain</H3> 425<PRE> 426public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</A><<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>> <B>getCausalChain</B>(<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> throwable)</PRE> 427<DL> 428<DD>Gets a <code>Throwable</code> cause chain as a list. The first entry in the 429 list will be <code>throwable</code> followed by its cause hierarchy. Note 430 that this is a snapshot of the cause chain and will not reflect 431 any subsequent changes to the cause chain. 432 433 <p>Here's an example of how it can be used to find specific types 434 of exceptions in the cause chain: 435 436 <pre> 437 Iterables.filter(Throwables.getCausalChain(e), IOException.class)); 438 </pre> 439<P> 440<DD><DL> 441<DT><B>Parameters:</B><DD><CODE>throwable</CODE> - the non-null <code>Throwable</code> to extract causes from 442<DT><B>Returns:</B><DD>an unmodifiable list containing the cause chain starting with 443 <code>throwable</code></DL> 444</DD> 445</DL> 446<HR> 447 448<A NAME="getStackTraceAsString(java.lang.Throwable)"><!-- --></A><H3> 449getStackTraceAsString</H3> 450<PRE> 451public static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>getStackTraceAsString</B>(<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> throwable)</PRE> 452<DL> 453<DD>Returns a string containing the result of 454 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Throwable.html?is-external=true#toString()" title="class or interface in java.lang"><CODE>toString()</CODE></A>, followed by the full, recursive 455 stack trace of <code>throwable</code>. Note that you probably should not be 456 parsing the resulting string; if you need programmatic access to the stack 457 frames, you can call <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Throwable.html?is-external=true#getStackTrace()" title="class or interface in java.lang"><CODE>Throwable.getStackTrace()</CODE></A>. 458<P> 459<DD><DL> 460</DL> 461</DD> 462</DL> 463<HR> 464 465<A NAME="throwCause(java.lang.Exception, boolean)"><!-- --></A><H3> 466throwCause</H3> 467<PRE> 468public static <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A> <B>throwCause</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A> exception, 469 boolean combineStackTraces) 470 throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></PRE> 471<DL> 472<DD>Rethrows the cause exception of a given throwable, discarding the original 473 throwable. Optionally, the stack frames of the cause and the outer 474 exception are combined and the stack trace of the cause is set to this 475 combined trace. If there is no cause the original exception is rethrown 476 unchanged in all cases. 477<P> 478<DD><DL> 479<DT><B>Parameters:</B><DD><CODE>exception</CODE> - the exception from which to extract the cause<DD><CODE>combineStackTraces</CODE> - if true the stack trace of the cause will be 480 replaced by the concatenation of the trace from the exception and the 481 trace from the cause. 482<DT><B>Throws:</B> 483<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></CODE></DL> 484</DD> 485</DL> 486<!-- ========= END OF CLASS DATA ========= --> 487<HR> 488 489 490<!-- ======= START OF BOTTOM NAVBAR ====== --> 491<A NAME="navbar_bottom"><!-- --></A> 492<A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> 493<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> 494<TR> 495<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> 496<A NAME="navbar_bottom_firstrow"><!-- --></A> 497<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> 498 <TR ALIGN="center" VALIGN="top"> 499 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> 500 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> 501 <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> 502 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Throwables.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> 503 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> 504 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> 505 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> 506 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> 507 </TR> 508</TABLE> 509</TD> 510<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> 511</EM> 512</TD> 513</TR> 514 515<TR> 516<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 517 <A HREF="../../../../com/google/common/base/Suppliers.html" title="class in com.google.common.base"><B>PREV CLASS</B></A> 518 NEXT CLASS</FONT></TD> 519<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 520 <A HREF="../../../../index.html?com/google/common/base/Throwables.html" target="_top"><B>FRAMES</B></A> 521 <A HREF="Throwables.html" target="_top"><B>NO FRAMES</B></A> 522 <SCRIPT type="text/javascript"> 523 <!-- 524 if(window==top) { 525 document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); 526 } 527 //--> 528</SCRIPT> 529<NOSCRIPT> 530 <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A> 531</NOSCRIPT> 532 533 534</FONT></TD> 535</TR> 536<TR> 537<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 538 SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD> 539<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 540DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD> 541</TR> 542</TABLE> 543<A NAME="skip-navbar_bottom"></A> 544<!-- ======== END OF BOTTOM NAVBAR ======= --> 545 546<HR> 547 548</BODY> 549</HTML> 550
