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CachedMap (plexus-utils2 API)
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org.codehaus.plexus.util</FONT>
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Class CachedMap</H2>
<PRE>
<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.codehaus.plexus.util.CachedMap</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></DD>
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<DT><PRE>public final class <B>CachedMap</B><DT>extends <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></DL>
</PRE>
<P>
<p> This class provides cache access to <code>Map</code> collections.</p>
<p> Instance of this class can be used as "proxy" for any collection
implementing the <code>java.util.Map</code> interface.</p>
<p> Typically, <A HREF="../../../../org/codehaus/plexus/util/CachedMap.html" title="class in org.codehaus.plexus.util"><CODE>CachedMap</CODE></A> are used to accelerate access to
large collections when the access to the collection is not evenly
distributed (associative cache). The performance gain is about
50% for the fastest hash map collections (e.g. <A HREF="../../../../org/codehaus/plexus/util/FastMap.html" title="class in org.codehaus.plexus.util"><CODE>FastMap</CODE></A>).
For slower collections such as <code>java.util.TreeMap</code>,
non-resizable <A HREF="../../../../org/codehaus/plexus/util/FastMap.html" title="class in org.codehaus.plexus.util"><CODE>FastMap</CODE></A> (real-time) or database access,
performance can be of several orders of magnitude.</p>
<p> <b>Note:</b> The keys used to access elements of a <A HREF="../../../../org/codehaus/plexus/util/CachedMap.html" title="class in org.codehaus.plexus.util"><CODE>CachedMap</CODE></A> do
not need to be immutable as they are not stored in the cache
(only keys specified by the <A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#put(java.lang.Object, java.lang.Object)"><CODE>put(java.lang.Object, java.lang.Object)</CODE></A> method are).
In other words, access can be performed using mutable keys as long
as these keys can be compared for equality with the real map's keys
(e.g. same <code>hashCode</code> values).</p>
<p> This implementation is not synchronized. Multiple threads accessing
or modifying the collection must be synchronized externally.</p>
<p><i> This class is <b>public domain</b> (not copyrighted).</i></p>
<P>
<P>
<DL>
<DT><B>Version:</B></DT>
<DD>5.3, October 30, 2003</DD>
<DT><B>Author:</B></DT>
<DD><a href="mailto:jean-marie@dautelle.com">Jean-Marie Dautelle</a></DD>
</DL>
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<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#CachedMap()">CachedMap</A></B>()</CODE>
<BR>
Creates a cached map backed by a <A HREF="../../../../org/codehaus/plexus/util/FastMap.html" title="class in org.codehaus.plexus.util"><CODE>FastMap</CODE></A>.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#CachedMap(int)">CachedMap</A></B>(int cacheSize)</CODE>
<BR>
Creates a cached map backed by a <A HREF="../../../../org/codehaus/plexus/util/FastMap.html" title="class in org.codehaus.plexus.util"><CODE>FastMap</CODE></A> and having the
specified cache size.</TD>
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<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#CachedMap(int, java.util.Map)">CachedMap</A></B>(int cacheSize,
<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A> backingMap)</CODE>
<BR>
Creates a cached map backed by the specified map and having the specified
cache size.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#clear()">clear</A></B>()</CODE>
<BR>
Removes all mappings from this map (optional operation).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#containsKey(java.lang.Object)">containsKey</A></B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key)</CODE>
<BR>
Indicates if this map contains a mapping for the specified key.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#containsValue(java.lang.Object)">containsValue</A></B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> value)</CODE>
<BR>
Returns <code>true</code> if this map maps one or more keys to the
specified value.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#entrySet()">entrySet</A></B>()</CODE>
<BR>
Returns an <b>unmodifiable</b> view of the mappings contained in this
map.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#equals(java.lang.Object)">equals</A></B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> o)</CODE>
<BR>
Compares the specified object with this map for equality.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#flush()">flush</A></B>()</CODE>
<BR>
Flushes the key/value pairs being cached.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#get(java.lang.Object)">get</A></B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key)</CODE>
<BR>
Returns the value to which this map maps the specified key.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#getBackingMap()">getBackingMap</A></B>()</CODE>
<BR>
Returns the backing map.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#getCacheSize()">getCacheSize</A></B>()</CODE>
<BR>
Returns the actual cache size.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#hashCode()">hashCode</A></B>()</CODE>
<BR>
Returns the hash code value for this map.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#isEmpty()">isEmpty</A></B>()</CODE>
<BR>
Returns <code>true</code> if this map contains no key-value mappings.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#keySet()">keySet</A></B>()</CODE>
<BR>
Returns an <b>unmodifiable</b> view of the keys contained in this
map.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#put(java.lang.Object, java.lang.Object)">put</A></B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key,
<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> value)</CODE>
<BR>
Associates the specified value with the specified key in this map.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#putAll(java.util.Map)">putAll</A></B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A> map)</CODE>
<BR>
Copies all of the mappings from the specified map to this map
(optional operation).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#remove(java.lang.Object)">remove</A></B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key)</CODE>
<BR>
Removes the mapping for this key from this map if it is present.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#size()">size</A></B>()</CODE>
<BR>
Returns the number of key-value mappings in this map.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#values()">values</A></B>()</CODE>
<BR>
Returns an <b>unmodifiable</b> view of the values contained in this map.</TD>
</TR>
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<TD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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</TABLE>
<A NAME="CachedMap()"><!-- --></A><H3>
CachedMap</H3>
<PRE>
public <B>CachedMap</B>()</PRE>
<DL>
<DD>Creates a cached map backed by a <A HREF="../../../../org/codehaus/plexus/util/FastMap.html" title="class in org.codehaus.plexus.util"><CODE>FastMap</CODE></A>.
The default cache size and map capacity is set to <code>256</code>
entries.
<P>
</DL>
<HR>
<A NAME="CachedMap(int)"><!-- --></A><H3>
CachedMap</H3>
<PRE>
public <B>CachedMap</B>(int cacheSize)</PRE>
<DL>
<DD>Creates a cached map backed by a <A HREF="../../../../org/codehaus/plexus/util/FastMap.html" title="class in org.codehaus.plexus.util"><CODE>FastMap</CODE></A> and having the
specified cache size.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>cacheSize</CODE> - the cache size, the actual cache size is the
first power of 2 greater or equal to <code>cacheSize</code>.
This is also the initial capacity of the backing map.</DL>
</DL>
<HR>
<A NAME="CachedMap(int, java.util.Map)"><!-- --></A><H3>
CachedMap</H3>
<PRE>
public <B>CachedMap</B>(int cacheSize,
<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A> backingMap)</PRE>
<DL>
<DD>Creates a cached map backed by the specified map and having the specified
cache size. In order to maitain cache veracity, it is critical
that <b>all</b> update to the backing map is accomplished through the
<A HREF="../../../../org/codehaus/plexus/util/CachedMap.html" title="class in org.codehaus.plexus.util"><CODE>CachedMap</CODE></A> instance; otherwise <A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#flush()"><CODE>flush()</CODE></A> has to be called.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>cacheSize</CODE> - the cache size, the actual cache size is the
first power of 2 greater or equal to <code>cacheSize</code>.<DD><CODE>backingMap</CODE> - the backing map to be "wrapped" in a cached map.</DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="getCacheSize()"><!-- --></A><H3>
getCacheSize</H3>
<PRE>
public int <B>getCacheSize</B>()</PRE>
<DL>
<DD>Returns the actual cache size.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the cache size (power of 2).</DL>
</DD>
</DL>
<HR>
<A NAME="getBackingMap()"><!-- --></A><H3>
getBackingMap</H3>
<PRE>
public <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A> <B>getBackingMap</B>()</PRE>
<DL>
<DD>Returns the backing map. If the backing map is modified directly,
this <A HREF="../../../../org/codehaus/plexus/util/CachedMap.html" title="class in org.codehaus.plexus.util"><CODE>CachedMap</CODE></A> has to be flushed.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the backing map.<DT><B>See Also:</B><DD><A HREF="../../../../org/codehaus/plexus/util/CachedMap.html#flush()"><CODE>flush()</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="flush()"><!-- --></A><H3>
flush</H3>
<PRE>
public void <B>flush</B>()</PRE>
<DL>
<DD>Flushes the key/value pairs being cached. This method should be called
if the backing map is externally modified.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="get(java.lang.Object)"><!-- --></A><H3>
get</H3>
<PRE>
public <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> <B>get</B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key)</PRE>
<DL>
<DD>Returns the value to which this map maps the specified key.
First, the cache is being checked, then if the cache does not contains
the specified key, the backing map is accessed and the key/value
pair is stored in the cache.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#get(java.lang.Object)" title="class or interface in java.util">get</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the key whose associated value is to be returned.
<DT><B>Returns:</B><DD>the value to which this map maps the specified key, or
<code>null</code> if the map contains no mapping for this key.
<DT><B>Throws:</B>
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/ClassCastException.html?is-external=true" title="class or interface in java.lang">ClassCastException</A></CODE> - if the key is of an inappropriate type for
the backing map (optional).
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</A></CODE> - if the key is <code>null</code>.</DL>
</DD>
</DL>
<HR>
<A NAME="put(java.lang.Object, java.lang.Object)"><!-- --></A><H3>
put</H3>
<PRE>
public <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> <B>put</B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key,
<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> value)</PRE>
<DL>
<DD>Associates the specified value with the specified key in this map.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#put(K, V)" title="class or interface in java.util">put</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the key with which the specified value is to be associated.<DD><CODE>value</CODE> - the value to be associated with the specified key.
<DT><B>Returns:</B><DD>the previous value associated with specified key, or
<code>null</code> if there was no mapping for the key.
<DT><B>Throws:</B>
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</A></CODE> - if the <code>put</code> operation
is not supported by the backing map.
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/ClassCastException.html?is-external=true" title="class or interface in java.lang">ClassCastException</A></CODE> - if the class of the specified key or value
prevents it from being stored in this map.
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if some aspect of this key or value
prevents it from being stored in this map.
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</A></CODE> - if the key is <code>null</code>.</DL>
</DD>
</DL>
<HR>
<A NAME="remove(java.lang.Object)"><!-- --></A><H3>
remove</H3>
<PRE>
public <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> <B>remove</B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key)</PRE>
<DL>
<DD>Removes the mapping for this key from this map if it is present.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#remove(java.lang.Object)" title="class or interface in java.util">remove</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - key whose mapping is to be removed from the map.
<DT><B>Returns:</B><DD>previous value associated with specified key,
or <code>null</code> if there was no mapping for key.
<DT><B>Throws:</B>
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/ClassCastException.html?is-external=true" title="class or interface in java.lang">ClassCastException</A></CODE> - if the key is of an inappropriate type for
the backing map (optional).
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</A></CODE> - if the key is <code>null</code>.
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</A></CODE> - if the <code>remove</code> method
is not supported by the backing map.</DL>
</DD>
</DL>
<HR>
<A NAME="containsKey(java.lang.Object)"><!-- --></A><H3>
containsKey</H3>
<PRE>
public boolean <B>containsKey</B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> key)</PRE>
<DL>
<DD>Indicates if this map contains a mapping for the specified key.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#containsKey(java.lang.Object)" title="class or interface in java.util">containsKey</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the key whose presence in this map is to be tested.
<DT><B>Returns:</B><DD><code>true</code> if this map contains a mapping for the
specified key; <code>false</code> otherwise.</DL>
</DD>
</DL>
<HR>
<A NAME="size()"><!-- --></A><H3>
size</H3>
<PRE>
public int <B>size</B>()</PRE>
<DL>
<DD>Returns the number of key-value mappings in this map. If the
map contains more than <code>Integer.MAX_VALUE</code> elements,
returns <code>Integer.MAX_VALUE</code>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#size()" title="class or interface in java.util">size</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the number of key-value mappings in this map.</DL>
</DD>
</DL>
<HR>
<A NAME="isEmpty()"><!-- --></A><H3>
isEmpty</H3>
<PRE>
public boolean <B>isEmpty</B>()</PRE>
<DL>
<DD>Returns <code>true</code> if this map contains no key-value mappings.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#isEmpty()" title="class or interface in java.util">isEmpty</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD><code>true</code> if this map contains no key-value mappings.</DL>
</DD>
</DL>
<HR>
<A NAME="containsValue(java.lang.Object)"><!-- --></A><H3>
containsValue</H3>
<PRE>
public boolean <B>containsValue</B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> value)</PRE>
<DL>
<DD>Returns <code>true</code> if this map maps one or more keys to the
specified value.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#containsValue(java.lang.Object)" title="class or interface in java.util">containsValue</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>value</CODE> - value whose presence in this map is to be tested.
<DT><B>Returns:</B><DD><code>true</code> if this map maps one or more keys to the
specified value.
<DT><B>Throws:</B>
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/ClassCastException.html?is-external=true" title="class or interface in java.lang">ClassCastException</A></CODE> - if the value is of an inappropriate type for
the backing map (optional).
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</A></CODE> - if the value is <code>null</code> and the
backing map does not not permit <code>null</code> values.</DL>
</DD>
</DL>
<HR>
<A NAME="putAll(java.util.Map)"><!-- --></A><H3>
putAll</H3>
<PRE>
public void <B>putAll</B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A> map)</PRE>
<DL>
<DD>Copies all of the mappings from the specified map to this map
(optional operation). This method automatically flushes the cache.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#putAll(java.util.Map)" title="class or interface in java.util">putAll</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>map</CODE> - the mappings to be stored in this map.
<DT><B>Throws:</B>
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</A></CODE> - if the <code>putAll</code> method
is not supported by the backing map.
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/ClassCastException.html?is-external=true" title="class or interface in java.lang">ClassCastException</A></CODE> - if the class of a key or value in the
specified map prevents it from being stored in this map.
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - some aspect of a key or value in the
specified map prevents it from being stored in this map.
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</A></CODE> - the specified map is <code>null</code>, or
if the backing map does not permit <code>null</code> keys or
values, and the specified map contains <code>null</code> keys or
values.</DL>
</DD>
</DL>
<HR>
<A NAME="clear()"><!-- --></A><H3>
clear</H3>
<PRE>
public void <B>clear</B>()</PRE>
<DL>
<DD>Removes all mappings from this map (optional operation). This method
automatically flushes the cache.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#clear()" title="class or interface in java.util">clear</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</A></CODE> - if clear is not supported by the
backing map.</DL>
</DD>
</DL>
<HR>
<A NAME="keySet()"><!-- --></A><H3>
keySet</H3>
<PRE>
public <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</A> <B>keySet</B>()</PRE>
<DL>
<DD>Returns an <b>unmodifiable</b> view of the keys contained in this
map.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#keySet()" title="class or interface in java.util">keySet</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>an unmodifiable view of the keys contained in this map.</DL>
</DD>
</DL>
<HR>
<A NAME="values()"><!-- --></A><H3>
values</H3>
<PRE>
public <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</A> <B>values</B>()</PRE>
<DL>
<DD>Returns an <b>unmodifiable</b> view of the values contained in this map.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#values()" title="class or interface in java.util">values</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>an unmodifiable view of the values contained in this map.</DL>
</DD>
</DL>
<HR>
<A NAME="entrySet()"><!-- --></A><H3>
entrySet</H3>
<PRE>
public <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</A> <B>entrySet</B>()</PRE>
<DL>
<DD>Returns an <b>unmodifiable</b> view of the mappings contained in this
map. Each element in the returned set is a <code>Map.Entry</code>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#entrySet()" title="class or interface in java.util">entrySet</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>an unmodifiable view of the mappings contained in this map.</DL>
</DD>
</DL>
<HR>
<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
public boolean <B>equals</B>(<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A> o)</PRE>
<DL>
<DD>Compares the specified object with this map for equality. Returns
<tt>true</tt> if the given object is also a map and the two Maps
represent the same mappings.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.util">equals</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A></CODE> in class <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - object to be compared for equality with this map.
<DT><B>Returns:</B><DD><code>true</code> if the specified object is equal to this map.</DL>
</DD>
</DL>
<HR>
<A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
public int <B>hashCode</B>()</PRE>
<DL>
<DD>Returns the hash code value for this map.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true#hashCode()" title="class or interface in java.util">hashCode</A></CODE> in interface <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A></CODE> in class <CODE><A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the hash code value for this map.</DL>
</DD>
</DL>
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