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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<!--NewPage-->
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<!-- Generated by javadoc (build 1.6.0) on Thu Mar 06 17:19:14 EST 2008 -->
<TITLE>
ClassCache (Rhino)
</TITLE>
<META NAME="date" CONTENT="2008-03-06">
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SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
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org.mozilla.javascript</FONT>
<BR>
Class ClassCache</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>org.mozilla.javascript.ClassCache</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>ClassCache</B><DT>extends java.lang.Object</DL>
</PRE>
<P>
Cache of generated classes and data structures to access Java runtime
from JavaScript.
<P>
<P>
<DL>
<DT><B>Since:</B></DT>
<DD>Rhino 1.5 Release 5</DD>
<DT><B>Author:</B></DT>
<DD>Igor Bukanov</DD>
</DL>
<HR>
<P>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<A NAME="constructor_summary"><!-- --></A>
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<B>Constructor Summary</B></FONT></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ClassCache.html#ClassCache()">ClassCache</A></B>()</CODE>
<BR>
</TD>
</TR>
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<!-- ========== METHOD SUMMARY =========== -->
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ClassCache.html#associate(org.mozilla.javascript.ScriptableObject)">associate</A></B>(<A HREF="../../../org/mozilla/javascript/ScriptableObject.html" title="class in org.mozilla.javascript">ScriptableObject</A> topScope)</CODE>
<BR>
Associate ClassCache object with the given top-level scope.</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/mozilla/javascript/ClassCache.html#clearCaches()">clearCaches</A></B>()</CODE>
<BR>
Empty caches of generated Java classes and Java reflection information.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../../org/mozilla/javascript/ClassCache.html" title="class in org.mozilla.javascript">ClassCache</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ClassCache.html#get(org.mozilla.javascript.Scriptable)">get</A></B>(<A HREF="../../../org/mozilla/javascript/Scriptable.html" title="interface in org.mozilla.javascript">Scriptable</A> scope)</CODE>
<BR>
Search for ClassCache object in the given scope.</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/mozilla/javascript/ClassCache.html#isCachingEnabled()">isCachingEnabled</A></B>()</CODE>
<BR>
Check if generated Java classes and Java reflection information
is cached.</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/mozilla/javascript/ClassCache.html#isInvokerOptimizationEnabled()">isInvokerOptimizationEnabled</A></B>()</CODE>
<BR>
<B>Deprecated.</B> <I>The method always returns false.</I></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/mozilla/javascript/ClassCache.html#newClassSerialNumber()">newClassSerialNumber</A></B>()</CODE>
<BR>
Internal engine method to return serial number for generated classes
to ensure name uniqueness.</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/mozilla/javascript/ClassCache.html#setCachingEnabled(boolean)">setCachingEnabled</A></B>(boolean enabled)</CODE>
<BR>
Set whether to cache some values.</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/mozilla/javascript/ClassCache.html#setInvokerOptimizationEnabled(boolean)">setInvokerOptimizationEnabled</A></B>(boolean enabled)</CODE>
<BR>
<B>Deprecated.</B> <I>The method does nothing.
Invoker optimization is no longer used by Rhino.
On modern JDK like 1.4 or 1.5 the disadvantages of the optimization
like increased memory usage or longer initialization time overweight
small speed increase that can be gained using generated proxy class
to replace reflection.</I></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
<P>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
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<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="ClassCache()"><!-- --></A><H3>
ClassCache</H3>
<PRE>
public <B>ClassCache</B>()</PRE>
<DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
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<B>Method Detail</B></FONT></TH>
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<A NAME="get(org.mozilla.javascript.Scriptable)"><!-- --></A><H3>
get</H3>
<PRE>
public static <A HREF="../../../org/mozilla/javascript/ClassCache.html" title="class in org.mozilla.javascript">ClassCache</A> <B>get</B>(<A HREF="../../../org/mozilla/javascript/Scriptable.html" title="interface in org.mozilla.javascript">Scriptable</A> scope)</PRE>
<DL>
<DD>Search for ClassCache object in the given scope.
The method first calls
<A HREF="../../../org/mozilla/javascript/ScriptableObject.html#getTopLevelScope(org.mozilla.javascript.Scriptable)"><CODE>ScriptableObject.getTopLevelScope(Scriptable scope)</CODE></A>
to get the top most scope and then tries to locate associated
ClassCache object in the prototype chain of the top scope.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>scope</CODE> - scope to search for ClassCache object.
<DT><B>Returns:</B><DD>previously associated ClassCache object or a new instance of
ClassCache if no ClassCache object was found.<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ClassCache.html#associate(org.mozilla.javascript.ScriptableObject)"><CODE>associate(ScriptableObject topScope)</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="associate(org.mozilla.javascript.ScriptableObject)"><!-- --></A><H3>
associate</H3>
<PRE>
public boolean <B>associate</B>(<A HREF="../../../org/mozilla/javascript/ScriptableObject.html" title="class in org.mozilla.javascript">ScriptableObject</A> topScope)</PRE>
<DL>
<DD>Associate ClassCache object with the given top-level scope.
The ClassCache object can only be associated with the given scope once.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>topScope</CODE> - scope to associate this ClassCache object with.
<DT><B>Returns:</B><DD>true if no previous ClassCache objects were embedded into
the scope and this ClassCache were successfully associated
or false otherwise.<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ClassCache.html#get(org.mozilla.javascript.Scriptable)"><CODE>get(Scriptable scope)</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="clearCaches()"><!-- --></A><H3>
clearCaches</H3>
<PRE>
public void <B>clearCaches</B>()</PRE>
<DL>
<DD>Empty caches of generated Java classes and Java reflection information.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="isCachingEnabled()"><!-- --></A><H3>
isCachingEnabled</H3>
<PRE>
public final boolean <B>isCachingEnabled</B>()</PRE>
<DL>
<DD>Check if generated Java classes and Java reflection information
is cached.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="setCachingEnabled(boolean)"><!-- --></A><H3>
setCachingEnabled</H3>
<PRE>
public void <B>setCachingEnabled</B>(boolean enabled)</PRE>
<DL>
<DD>Set whether to cache some values.
<p>
By default, the engine will cache the results of
<tt>Class.getMethods()</tt> and similar calls.
This can speed execution dramatically, but increases the memory
footprint. Also, with caching enabled, references may be held to
objects past the lifetime of any real usage.
<p>
If caching is enabled and this method is called with a
<code>false</code> argument, the caches will be emptied.
<p>
Caching is enabled by default.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>enabled</CODE> - if true, caching is enabled<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ClassCache.html#clearCaches()"><CODE>clearCaches()</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="isInvokerOptimizationEnabled()"><!-- --></A><H3>
isInvokerOptimizationEnabled</H3>
<PRE>
public boolean <B>isInvokerOptimizationEnabled</B>()</PRE>
<DL>
<DD><B>Deprecated.</B> <I>The method always returns false.</I>
<P>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ClassCache.html#setInvokerOptimizationEnabled(boolean)"><CODE>setInvokerOptimizationEnabled(boolean enabled)</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="setInvokerOptimizationEnabled(boolean)"><!-- --></A><H3>
setInvokerOptimizationEnabled</H3>
<PRE>
public void <B>setInvokerOptimizationEnabled</B>(boolean enabled)</PRE>
<DL>
<DD><B>Deprecated.</B> <I>The method does nothing.
Invoker optimization is no longer used by Rhino.
On modern JDK like 1.4 or 1.5 the disadvantages of the optimization
like increased memory usage or longer initialization time overweight
small speed increase that can be gained using generated proxy class
to replace reflection.</I>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="newClassSerialNumber()"><!-- --></A><H3>
newClassSerialNumber</H3>
<PRE>
public final int <B>newClassSerialNumber</B>()</PRE>
<DL>
<DD>Internal engine method to return serial number for generated classes
to ensure name uniqueness.
<P>
<DD><DL>
</DL>
</DD>
</DL>
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