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7ForwardingFuture (Guava Libraries 2010.01.04)
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89<H2>
90<FONT SIZE="-1">
91com.google.common.util.concurrent</FONT>
92<BR>
93Class ForwardingFuture&lt;V&gt;</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="../../../../../com/google/common/collect/ForwardingObject.html" title="class in com.google.common.collect">com.google.common.collect.ForwardingObject</A>
97      <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>com.google.common.util.concurrent.ForwardingFuture&lt;V&gt;</B>
98</PRE>
99<DL>
100<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;V&gt;</DD>
101</DL>
102<HR>
103<DL>
104<DT><PRE>public abstract class <B>ForwardingFuture&lt;V&gt;</B><DT>extends <A HREF="../../../../../com/google/common/collect/ForwardingObject.html" title="class in com.google.common.collect">ForwardingObject</A><DT>implements <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;V&gt;</DL>
105</PRE>
106
107<P>
108A <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>Future</CODE></A> which forwards all its method calls to another future.
109 Subclasses should override one or more methods to modify the behavior of
110 the backing collection as desired per the <a
111 href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
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>Sven Mawson</DD>
120<DT><B>See Also:</B><DD><A HREF="../../../../../com/google/common/collect/ForwardingObject.html" title="class in com.google.common.collect"><CODE>ForwardingObject</CODE></A></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/util/concurrent/ForwardingFuture.html#ForwardingFuture()">ForwardingFuture</A></B>()</CODE>
135
136<BR>
137&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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140&nbsp;
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147<B>Method Summary</B></FONT></TH>
148</TR>
149<TR BGCOLOR="white" CLASS="TableRowColor">
150<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
151<CODE>&nbsp;boolean</CODE></FONT></TD>
152<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html#cancel(boolean)">cancel</A></B>(boolean&nbsp;mayInterruptIfRunning)</CODE>
153
154<BR>
155&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
156</TR>
157<TR BGCOLOR="white" CLASS="TableRowColor">
158<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
159<CODE>protected abstract &nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A>&gt;</CODE></FONT></TD>
160<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html#delegate()">delegate</A></B>()</CODE>
161
162<BR>
163&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the backing delegate instance that methods are forwarded to.</TD>
164</TR>
165<TR BGCOLOR="white" CLASS="TableRowColor">
166<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
167<CODE>&nbsp;<A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A></CODE></FONT></TD>
168<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html#get()">get</A></B>()</CODE>
169
170<BR>
171&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
172</TR>
173<TR BGCOLOR="white" CLASS="TableRowColor">
174<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
175<CODE>&nbsp;<A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A></CODE></FONT></TD>
176<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html#get(long, java.util.concurrent.TimeUnit)">get</A></B>(long&nbsp;timeout,
177    <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A>&nbsp;unit)</CODE>
178
179<BR>
180&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
181</TR>
182<TR BGCOLOR="white" CLASS="TableRowColor">
183<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
184<CODE>&nbsp;boolean</CODE></FONT></TD>
185<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html#isCancelled()">isCancelled</A></B>()</CODE>
186
187<BR>
188&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
189</TR>
190<TR BGCOLOR="white" CLASS="TableRowColor">
191<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
192<CODE>&nbsp;boolean</CODE></FONT></TD>
193<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html#isDone()">isDone</A></B>()</CODE>
194
195<BR>
196&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
197</TR>
198</TABLE>
199&nbsp;<A NAME="methods_inherited_from_class_com.google.common.collect.ForwardingObject"><!-- --></A>
200<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
201<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
202<TH ALIGN="left"><B>Methods inherited from class com.google.common.collect.<A HREF="../../../../../com/google/common/collect/ForwardingObject.html" title="class in com.google.common.collect">ForwardingObject</A></B></TH>
203</TR>
204<TR BGCOLOR="white" CLASS="TableRowColor">
205<TD><CODE><A HREF="../../../../../com/google/common/collect/ForwardingObject.html#toString()">toString</A></CODE></TD>
206</TR>
207</TABLE>
208&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
209<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
210<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
211<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>
212</TR>
213<TR BGCOLOR="white" CLASS="TableRowColor">
214<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#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>
215</TR>
216</TABLE>
217&nbsp;
218<P>
219
220<!-- ========= CONSTRUCTOR DETAIL ======== -->
221
222<A NAME="constructor_detail"><!-- --></A>
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224<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
225<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
226<B>Constructor Detail</B></FONT></TH>
227</TR>
228</TABLE>
229
230<A NAME="ForwardingFuture()"><!-- --></A><H3>
231ForwardingFuture</H3>
232<PRE>
233public <B>ForwardingFuture</B>()</PRE>
234<DL>
235</DL>
236
237<!-- ============ METHOD DETAIL ========== -->
238
239<A NAME="method_detail"><!-- --></A>
240<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
241<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
242<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
243<B>Method Detail</B></FONT></TH>
244</TR>
245</TABLE>
246
247<A NAME="delegate()"><!-- --></A><H3>
248delegate</H3>
249<PRE>
250protected abstract <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A>&gt; <B>delegate</B>()</PRE>
251<DL>
252<DD><B>Description copied from class: <CODE><A HREF="../../../../../com/google/common/collect/ForwardingObject.html#delegate()">ForwardingObject</A></CODE></B></DD>
253<DD>Returns the backing delegate instance that methods are forwarded to.
254 Abstract subclasses generally override this method with an abstract method
255 that has a more specific return type, such as <A HREF="../../../../../com/google/common/collect/ForwardingSet.html#delegate()"><CODE>ForwardingSet.delegate()</CODE></A>. Concrete subclasses override this method to supply
256 the instance being decorated.
257<P>
258<DD><DL>
259<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/google/common/collect/ForwardingObject.html#delegate()">delegate</A></CODE> in class <CODE><A HREF="../../../../../com/google/common/collect/ForwardingObject.html" title="class in com.google.common.collect">ForwardingObject</A></CODE></DL>
260</DD>
261<DD><DL>
262</DL>
263</DD>
264</DL>
265<HR>
266
267<A NAME="cancel(boolean)"><!-- --></A><H3>
268cancel</H3>
269<PRE>
270public boolean <B>cancel</B>(boolean&nbsp;mayInterruptIfRunning)</PRE>
271<DL>
272<DD><DL>
273<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#cancel(boolean)" title="class or interface in java.util.concurrent">cancel</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A>&gt;</CODE></DL>
274</DD>
275<DD><DL>
276</DL>
277</DD>
278</DL>
279<HR>
280
281<A NAME="isCancelled()"><!-- --></A><H3>
282isCancelled</H3>
283<PRE>
284public boolean <B>isCancelled</B>()</PRE>
285<DL>
286<DD><DL>
287<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#isCancelled()" title="class or interface in java.util.concurrent">isCancelled</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A>&gt;</CODE></DL>
288</DD>
289<DD><DL>
290</DL>
291</DD>
292</DL>
293<HR>
294
295<A NAME="isDone()"><!-- --></A><H3>
296isDone</H3>
297<PRE>
298public boolean <B>isDone</B>()</PRE>
299<DL>
300<DD><DL>
301<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#isDone()" title="class or interface in java.util.concurrent">isDone</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A>&gt;</CODE></DL>
302</DD>
303<DD><DL>
304</DL>
305</DD>
306</DL>
307<HR>
308
309<A NAME="get()"><!-- --></A><H3>
310get</H3>
311<PRE>
312public <A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A> <B>get</B>()
313      throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A>,
314             <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutionException.html?is-external=true" title="class or interface in java.util.concurrent">ExecutionException</A></PRE>
315<DL>
316<DD><DL>
317<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#get()" title="class or interface in java.util.concurrent">get</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A>&gt;</CODE></DL>
318</DD>
319<DD><DL>
320
321<DT><B>Throws:</B>
322<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></CODE>
323<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutionException.html?is-external=true" title="class or interface in java.util.concurrent">ExecutionException</A></CODE></DL>
324</DD>
325</DL>
326<HR>
327
328<A NAME="get(long, java.util.concurrent.TimeUnit)"><!-- --></A><H3>
329get</H3>
330<PRE>
331public <A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A> <B>get</B>(long&nbsp;timeout,
332             <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A>&nbsp;unit)
333      throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A>,
334             <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutionException.html?is-external=true" title="class or interface in java.util.concurrent">ExecutionException</A>,
335             <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeoutException.html?is-external=true" title="class or interface in java.util.concurrent">TimeoutException</A></PRE>
336<DL>
337<DD><DL>
338<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#get(long, java.util.concurrent.TimeUnit)" title="class or interface in java.util.concurrent">get</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/util/concurrent/ForwardingFuture.html" title="type parameter in ForwardingFuture">V</A>&gt;</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/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></CODE>
344<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutionException.html?is-external=true" title="class or interface in java.util.concurrent">ExecutionException</A></CODE>
345<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeoutException.html?is-external=true" title="class or interface in java.util.concurrent">TimeoutException</A></CODE></DL>
346</DD>
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