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85 <H2>
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87 com.google.common.collect</FONT>
88 <BR>
89 Class ForwardingConcurrentMap&lt;K,V&gt;</H2>
90 <PRE>
91 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A>
92 <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>
93 <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../com/google/common/collect/ForwardingMap.html" title="class in com.google.common.collect">com.google.common.collect.ForwardingMap</A>&lt;K,V&gt;
94 <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.google.common.collect.ForwardingConcurrentMap&lt;K,V&gt;</B>
95 </PRE>
96 <DL>
97 <DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html" title="class or interface in java.util.concurrent">ConcurrentMap</A>&lt;K,V&gt;, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A>&lt;K,V&gt;</DD>
98 </DL>
99 <HR>
100 <DL>
101 <DT><PRE>public abstract class <B>ForwardingConcurrentMap&lt;K,V&gt;</B><DT>extends <A HREF="../../../../com/google/common/collect/ForwardingMap.html" title="class in com.google.common.collect">ForwardingMap</A>&lt;K,V&gt;<DT>implements <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html" title="class or interface in java.util.concurrent">ConcurrentMap</A>&lt;K,V&gt;</DL>
102 </PRE>
103
104 <P>
105 A concurrent map which forwards all its method calls to another concurrent
106 map. Subclasses should override one or more methods to modify the behavior of
107 the backing map as desired per the <a
108 href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
109 <P>
110
111 <P>
112 <DL>
113 <DT><B>Author:</B></DT>
114 <DD>Charles Fry</DD>
115 <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>
116 <HR>
117
118 <P>
119 <!-- ======== NESTED CLASS SUMMARY ======== -->
120
121 <A NAME="nested_class_summary"><!-- --></A>
122 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
123 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
124 <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
125 <B>Nested Class Summary</B></FONT></TH>
126 </TR>
127 </TABLE>
128 &nbsp;<A NAME="nested_classes_inherited_from_class_java.util.Map"><!-- --></A>
129 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
130 <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
131 <TH ALIGN="left"><B>Nested classes/interfaces inherited from interface java.util.<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A></B></TH>
132 </TR>
133 <TR BGCOLOR="white" CLASS="TableRowColor">
134 <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.Entry.html" title="class or interface in java.util">Map.Entry</A>&lt;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.Entry.html" title="class or interface in java.util">K</A>,<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.Entry.html" title="class or interface in java.util">V</A>&gt;</CODE></TD>
135 </TR>
136 </TABLE>
137 &nbsp;
138
139 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
140
141 <A NAME="constructor_summary"><!-- --></A>
142 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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144 <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
145 <B>Constructor Summary</B></FONT></TH>
146 </TR>
147 <TR BGCOLOR="white" CLASS="TableRowColor">
148 <TD><CODE><B><A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html#ForwardingConcurrentMap()">ForwardingConcurrentMap</A></B>()</CODE>
149
150 <BR>
151 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
152 </TR>
153 </TABLE>
154 &nbsp;
155 <!-- ========== METHOD SUMMARY =========== -->
156
157 <A NAME="method_summary"><!-- --></A>
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161 <B>Method Summary</B></FONT></TH>
162 </TR>
163 <TR BGCOLOR="white" CLASS="TableRowColor">
164 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
165 <CODE>protected abstract &nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html" title="class or interface in java.util.concurrent">ConcurrentMap</A>&lt;<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>,<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&gt;</CODE></FONT></TD>
166 <TD><CODE><B><A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html#delegate()">delegate</A></B>()</CODE>
167
168 <BR>
169 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the backing delegate instance that methods are forwarded to.</TD>
170 </TR>
171 <TR BGCOLOR="white" CLASS="TableRowColor">
172 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
173 <CODE>&nbsp;<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A></CODE></FONT></TD>
174 <TD><CODE><B><A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html#putIfAbsent(K, V)">putIfAbsent</A></B>(<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>&nbsp;key,
175 <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&nbsp;value)</CODE>
176
177 <BR>
178 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;If the specified key is not already associated
179 with a value, associate it with the given value.</TD>
180 </TR>
181 <TR BGCOLOR="white" CLASS="TableRowColor">
182 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
183 <CODE>&nbsp;boolean</CODE></FONT></TD>
184 <TD><CODE><B><A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html#remove(java.lang.Object, java.lang.Object)">remove</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;key,
185 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;value)</CODE>
186
187 <BR>
188 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Remove entry for key only if currently mapped to given value.</TD>
189 </TR>
190 <TR BGCOLOR="white" CLASS="TableRowColor">
191 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
192 <CODE>&nbsp;<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A></CODE></FONT></TD>
193 <TD><CODE><B><A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html#replace(K, V)">replace</A></B>(<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>&nbsp;key,
194 <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&nbsp;value)</CODE>
195
196 <BR>
197 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Replace entry for key only if currently mapped to some value.</TD>
198 </TR>
199 <TR BGCOLOR="white" CLASS="TableRowColor">
200 <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
201 <CODE>&nbsp;boolean</CODE></FONT></TD>
202 <TD><CODE><B><A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html#replace(K, V, V)">replace</A></B>(<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>&nbsp;key,
203 <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&nbsp;oldValue,
204 <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&nbsp;newValue)</CODE>
205
206 <BR>
207 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Replace entry for key only if currently mapped to given value.</TD>
208 </TR>
209 </TABLE>
210 &nbsp;<A NAME="methods_inherited_from_class_com.google.common.collect.ForwardingMap"><!-- --></A>
211 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
212 <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
213 <TH ALIGN="left"><B>Methods inherited from class com.google.common.collect.<A HREF="../../../../com/google/common/collect/ForwardingMap.html" title="class in com.google.common.collect">ForwardingMap</A></B></TH>
214 </TR>
215 <TR BGCOLOR="white" CLASS="TableRowColor">
216 <TD><CODE><A HREF="../../../../com/google/common/collect/ForwardingMap.html#clear()">clear</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#containsKey(java.lang.Object)">containsKey</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#containsValue(java.lang.Object)">containsValue</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#entrySet()">entrySet</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#equals(java.lang.Object)">equals</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#get(java.lang.Object)">get</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#hashCode()">hashCode</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#isEmpty()">isEmpty</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#keySet()">keySet</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#put(K, V)">put</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#putAll(java.util.Map)">putAll</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#remove(java.lang.Object)">remove</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#size()">size</A>, <A HREF="../../../../com/google/common/collect/ForwardingMap.html#values()">values</A></CODE></TD>
217 </TR>
218 </TABLE>
219 &nbsp;<A NAME="methods_inherited_from_class_com.google.common.collect.ForwardingObject"><!-- --></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 com.google.common.collect.<A HREF="../../../../com/google/common/collect/ForwardingObject.html" title="class in com.google.common.collect">ForwardingObject</A></B></TH>
223 </TR>
224 <TR BGCOLOR="white" CLASS="TableRowColor">
225 <TD><CODE><A HREF="../../../../com/google/common/collect/ForwardingObject.html#toString()">toString</A></CODE></TD>
226 </TR>
227 </TABLE>
228 &nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
229 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
230 <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
231 <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TH>
232 </TR>
233 <TR BGCOLOR="white" CLASS="TableRowColor">
234 <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html#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#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
235 </TR>
236 </TABLE>
237 &nbsp;<A NAME="methods_inherited_from_class_java.util.Map"><!-- --></A>
238 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
239 <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
240 <TH ALIGN="left"><B>Methods inherited from interface java.util.<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A></B></TH>
241 </TR>
242 <TR BGCOLOR="white" CLASS="TableRowColor">
243 <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#clear()" title="class or interface in java.util">clear</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#containsKey(java.lang.Object)" title="class or interface in java.util">containsKey</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#containsValue(java.lang.Object)" title="class or interface in java.util">containsValue</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#entrySet()" title="class or interface in java.util">entrySet</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#equals(java.lang.Object)" title="class or interface in java.util">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#get(java.lang.Object)" title="class or interface in java.util">get</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#hashCode()" title="class or interface in java.util">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#isEmpty()" title="class or interface in java.util">isEmpty</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#keySet()" title="class or interface in java.util">keySet</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#put(K, V)" title="class or interface in java.util">put</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#putAll(java.util.Map)" title="class or interface in java.util">putAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#remove(java.lang.Object)" title="class or interface in java.util">remove</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#size()" title="class or interface in java.util">size</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Map.html#values()" title="class or interface in java.util">values</A></CODE></TD>
244 </TR>
245 </TABLE>
246 &nbsp;
247 <P>
248
249 <!-- ========= CONSTRUCTOR DETAIL ======== -->
250
251 <A NAME="constructor_detail"><!-- --></A>
252 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
253 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
254 <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
255 <B>Constructor Detail</B></FONT></TH>
256 </TR>
257 </TABLE>
258
259 <A NAME="ForwardingConcurrentMap()"><!-- --></A><H3>
260 ForwardingConcurrentMap</H3>
261 <PRE>
262 public <B>ForwardingConcurrentMap</B>()</PRE>
263 <DL>
264 </DL>
265
266 <!-- ============ METHOD DETAIL ========== -->
267
268 <A NAME="method_detail"><!-- --></A>
269 <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
270 <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
271 <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
272 <B>Method Detail</B></FONT></TH>
273 </TR>
274 </TABLE>
275
276 <A NAME="delegate()"><!-- --></A><H3>
277 delegate</H3>
278 <PRE>
279 protected abstract <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html" title="class or interface in java.util.concurrent">ConcurrentMap</A>&lt;<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>,<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&gt; <B>delegate</B>()</PRE>
280 <DL>
281 <DD><B>Description copied from class: <CODE><A HREF="../../../../com/google/common/collect/ForwardingObject.html#delegate()">ForwardingObject</A></CODE></B></DD>
282 <DD>Returns the backing delegate instance that methods are forwarded to.
283 Abstract subclasses generally override the <A HREF="../../../../com/google/common/collect/ForwardingObject.html" title="class in com.google.common.collect"><CODE>ForwardingObject</CODE></A> method
284 with an abstract method that has a more specific return type, such as
285 <A HREF="../../../../com/google/common/collect/ForwardingSet.html#delegate()"><CODE>ForwardingSet.delegate()</CODE></A>. Concrete subclasses override this method to
286 supply the instance being decorated.
287 <P>
288 <DD><DL>
289 <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../com/google/common/collect/ForwardingMap.html#delegate()">delegate</A></CODE> in class <CODE><A HREF="../../../../com/google/common/collect/ForwardingMap.html" title="class in com.google.common.collect">ForwardingMap</A>&lt;<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>,<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&gt;</CODE></DL>
290 </DD>
291 <DD><DL>
292 </DL>
293 </DD>
294 </DL>
295 <HR>
296
297 <A NAME="putIfAbsent(java.lang.Object,java.lang.Object)"><!-- --></A><A NAME="putIfAbsent(K, V)"><!-- --></A><H3>
298 putIfAbsent</H3>
299 <PRE>
300 public <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A> <B>putIfAbsent</B>(<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>&nbsp;key,
301 <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&nbsp;value)</PRE>
302 <DL>
303 <DD><B>Description copied from interface: <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html#putIfAbsent(K, V)" title="class or interface in java.util.concurrent">java.util.concurrent.ConcurrentMap</A></CODE></B></DD>
304 <DD>If the specified key is not already associated
305 with a value, associate it with the given value.
306 This is equivalent to
307 <pre>
308 if (!map.containsKey(key))
309 return map.put(key, value);
310 else
311 return map.get(key);
312 </pre>
313 Except that the action is performed atomically.
314 <P>
315 <DD><DL>
316 <DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html#putIfAbsent(K, V)" title="class or interface in java.util.concurrent">putIfAbsent</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html" title="class or interface in java.util.concurrent">ConcurrentMap</A>&lt;<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>,<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&gt;</CODE></DL>
317 </DD>
318 <DD><DL>
319 <DT><B>Parameters:</B><DD><CODE>key</CODE> - key with which the specified value is to be associated.<DD><CODE>value</CODE> - value to be associated with the specified key.
320 <DT><B>Returns:</B><DD>previous value associated with specified key, or <tt>null</tt>
321 if there was no mapping for key. A <tt>null</tt> return can
322 also indicate that the map previously associated <tt>null</tt>
323 with the specified key, if the implementation supports
324 <tt>null</tt> values.</DL>
325 </DD>
326 </DL>
327 <HR>
328
329 <A NAME="remove(java.lang.Object, java.lang.Object)"><!-- --></A><H3>
330 remove</H3>
331 <PRE>
332 public boolean <B>remove</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;key,
333 <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;value)</PRE>
334 <DL>
335 <DD><B>Description copied from interface: <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html#remove(java.lang.Object, java.lang.Object)" title="class or interface in java.util.concurrent">java.util.concurrent.ConcurrentMap</A></CODE></B></DD>
336 <DD>Remove entry for key only if currently mapped to given value.
337 Acts as
338 <pre>
339 if ((map.containsKey(key) && map.get(key).equals(value)) {
340 map.remove(key);
341 return true;
342 } else return false;
343 </pre>
344 except that the action is performed atomically.
345 <P>
346 <DD><DL>
347 <DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html#remove(java.lang.Object, java.lang.Object)" title="class or interface in java.util.concurrent">remove</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html" title="class or interface in java.util.concurrent">ConcurrentMap</A>&lt;<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>,<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&gt;</CODE></DL>
348 </DD>
349 <DD><DL>
350 <DT><B>Parameters:</B><DD><CODE>key</CODE> - key with which the specified value is associated.<DD><CODE>value</CODE> - value associated with the specified key.
351 <DT><B>Returns:</B><DD>true if the value was removed, false otherwise</DL>
352 </DD>
353 </DL>
354 <HR>
355
356 <A NAME="replace(java.lang.Object,java.lang.Object)"><!-- --></A><A NAME="replace(K, V)"><!-- --></A><H3>
357 replace</H3>
358 <PRE>
359 public <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A> <B>replace</B>(<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>&nbsp;key,
360 <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&nbsp;value)</PRE>
361 <DL>
362 <DD><B>Description copied from interface: <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html#replace(K, V)" title="class or interface in java.util.concurrent">java.util.concurrent.ConcurrentMap</A></CODE></B></DD>
363 <DD>Replace entry for key only if currently mapped to some value.
364 Acts as
365 <pre>
366 if ((map.containsKey(key)) {
367 return map.put(key, value);
368 } else return null;
369 </pre>
370 except that the action is performed atomically.
371 <P>
372 <DD><DL>
373 <DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html#replace(K, V)" title="class or interface in java.util.concurrent">replace</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html" title="class or interface in java.util.concurrent">ConcurrentMap</A>&lt;<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>,<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&gt;</CODE></DL>
374 </DD>
375 <DD><DL>
376 <DT><B>Parameters:</B><DD><CODE>key</CODE> - key with which the specified value is associated.<DD><CODE>value</CODE> - value to be associated with the specified key.
377 <DT><B>Returns:</B><DD>previous value associated with specified key, or <tt>null</tt>
378 if there was no mapping for key. A <tt>null</tt> return can
379 also indicate that the map previously associated <tt>null</tt>
380 with the specified key, if the implementation supports
381 <tt>null</tt> values.</DL>
382 </DD>
383 </DL>
384 <HR>
385
386 <A NAME="replace(java.lang.Object,java.lang.Object,java.lang.Object)"><!-- --></A><A NAME="replace(K, V, V)"><!-- --></A><H3>
387 replace</H3>
388 <PRE>
389 public boolean <B>replace</B>(<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>&nbsp;key,
390 <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&nbsp;oldValue,
391 <A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&nbsp;newValue)</PRE>
392 <DL>
393 <DD><B>Description copied from interface: <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html#replace(K, V, V)" title="class or interface in java.util.concurrent">java.util.concurrent.ConcurrentMap</A></CODE></B></DD>
394 <DD>Replace entry for key only if currently mapped to given value.
395 Acts as
396 <pre>
397 if ((map.containsKey(key) && map.get(key).equals(oldValue)) {
398 map.put(key, newValue);
399 return true;
400 } else return false;
401 </pre>
402 except that the action is performed atomically.
403 <P>
404 <DD><DL>
405 <DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html#replace(K, V, V)" title="class or interface in java.util.concurrent">replace</A></CODE> in interface <CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ConcurrentMap.html" title="class or interface in java.util.concurrent">ConcurrentMap</A>&lt;<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">K</A>,<A HREF="../../../../com/google/common/collect/ForwardingConcurrentMap.html" title="type parameter in ForwardingConcurrentMap">V</A>&gt;</CODE></DL>
406 </DD>
407 <DD><DL>
408 <DT><B>Parameters:</B><DD><CODE>key</CODE> - key with which the specified value is associated.<DD><CODE>oldValue</CODE> - value expected to be associated with the specified key.<DD><CODE>newValue</CODE> - value to be associated with the specified key.
409 <DT><B>Returns:</B><DD>true if the value was replaced</DL>
410 </DD>
411 </DL>
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