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ContextFactory (Rhino)
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SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
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org.mozilla.javascript</FONT>
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Class ContextFactory</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>org.mozilla.javascript.ContextFactory</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>ContextFactory</B><DT>extends java.lang.Object</DL>
</PRE>
<P>
Factory class that Rhino runtime uses to create new <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A>
instances. A <code>ContextFactory</code> can also notify listeners
about context creation and release.
<p>
When the Rhino runtime needs to create new <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> instance during
execution of <A HREF="../../../org/mozilla/javascript/Context.html#enter()"><CODE>Context.enter()</CODE></A> or <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A>, it will call
<A HREF="../../../org/mozilla/javascript/ContextFactory.html#makeContext()"><CODE>makeContext()</CODE></A> of the current global ContextFactory.
See <A HREF="../../../org/mozilla/javascript/ContextFactory.html#getGlobal()"><CODE>getGlobal()</CODE></A> and <A HREF="../../../org/mozilla/javascript/ContextFactory.html#initGlobal(org.mozilla.javascript.ContextFactory)"><CODE>initGlobal(ContextFactory)</CODE></A>.
<p>
It is also possible to use explicit ContextFactory instances for Context
creation. This is useful to have a set of independent Rhino runtime
instances under single JVM. See <A HREF="../../../org/mozilla/javascript/ContextFactory.html#call(org.mozilla.javascript.ContextAction)"><CODE>call(ContextAction)</CODE></A>.
<p>
The following example demonstrates Context customization to terminate
scripts running more then 10 seconds and to provide better compatibility
with JavaScript code using MSIE-specific features.
<pre>
import org.mozilla.javascript.*;
class MyFactory extends ContextFactory
{
// Custom <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> to store execution time.
private static class MyContext extends Context
{
long startTime;
}
static {
// Initialize GlobalFactory with custom factory
ContextFactory.initGlobal(new MyFactory());
}
// Override <A HREF="../../../org/mozilla/javascript/ContextFactory.html#makeContext()"><CODE>makeContext()</CODE></A>
protected Context makeContext()
{
MyContext cx = new MyContext();
// Use pure interpreter mode to allow for
// <A HREF="../../../org/mozilla/javascript/ContextFactory.html#observeInstructionCount(org.mozilla.javascript.Context, int)"><CODE>observeInstructionCount(Context, int)</CODE></A> to work
cx.setOptimizationLevel(-1);
// Make Rhino runtime to call observeInstructionCount
// each 10000 bytecode instructions
cx.setInstructionObserverThreshold(10000);
return cx;
}
// Override <A HREF="../../../org/mozilla/javascript/ContextFactory.html#hasFeature(org.mozilla.javascript.Context, int)"><CODE>hasFeature(Context, int)</CODE></A>
public boolean hasFeature(Context cx, int featureIndex)
{
// Turn on maximum compatibility with MSIE scripts
switch (featureIndex) {
case <A HREF="../../../org/mozilla/javascript/Context.html#FEATURE_NON_ECMA_GET_YEAR"><CODE>Context.FEATURE_NON_ECMA_GET_YEAR</CODE></A>:
return true;
case <A HREF="../../../org/mozilla/javascript/Context.html#FEATURE_MEMBER_EXPR_AS_FUNCTION_NAME"><CODE>Context.FEATURE_MEMBER_EXPR_AS_FUNCTION_NAME</CODE></A>:
return true;
case <A HREF="../../../org/mozilla/javascript/Context.html#FEATURE_RESERVED_KEYWORD_AS_IDENTIFIER"><CODE>Context.FEATURE_RESERVED_KEYWORD_AS_IDENTIFIER</CODE></A>:
return true;
case <A HREF="../../../org/mozilla/javascript/Context.html#FEATURE_PARENT_PROTO_PROPERTIES"><CODE>Context.FEATURE_PARENT_PROTO_PROPERTIES</CODE></A>:
return false;
}
return super.hasFeature(cx, featureIndex);
}
// Override <A HREF="../../../org/mozilla/javascript/ContextFactory.html#observeInstructionCount(org.mozilla.javascript.Context, int)"><CODE>observeInstructionCount(Context, int)</CODE></A>
protected void observeInstructionCount(Context cx, int instructionCount)
{
MyContext mcx = (MyContext)cx;
long currentTime = System.currentTimeMillis();
if (currentTime - mcx.startTime > 10*1000) {
// More then 10 seconds from Context creation time:
// it is time to stop the script.
// Throw Error instance to ensure that script will never
// get control back through catch or finally.
throw new Error();
}
}
// Override <A HREF="../../../org/mozilla/javascript/ContextFactory.html#doTopCall(org.mozilla.javascript.Callable, org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[])"><CODE>doTopCall(Callable,
Context, Scriptable,
Scriptable, Object[])</CODE></A>
protected Object doTopCall(Callable callable,
Context cx, Scriptable scope,
Scriptable thisObj, Object[] args)
{
MyContext mcx = (MyContext)cx;
mcx.startTime = System.currentTimeMillis();
return super.doTopCall(callable, cx, scope, thisObj, args);
}
}
</pre>
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<CODE>static interface</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.Listener.html" title="interface in org.mozilla.javascript">ContextFactory.Listener</A></B></CODE>
<BR>
Listener of <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> creation and release events.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#ContextFactory()">ContextFactory</A></B>()</CODE>
<BR>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#addListener(org.mozilla.javascript.ContextFactory.Listener)">addListener</A></B>(<A HREF="../../../org/mozilla/javascript/ContextFactory.Listener.html" title="interface in org.mozilla.javascript">ContextFactory.Listener</A> listener)</CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#call(org.mozilla.javascript.ContextAction)">call</A></B>(<A HREF="../../../org/mozilla/javascript/ContextAction.html" title="interface in org.mozilla.javascript">ContextAction</A> action)</CODE>
<BR>
Call <A HREF="../../../org/mozilla/javascript/ContextAction.html#run(org.mozilla.javascript.Context)"><CODE>ContextAction.run(Context cx)</CODE></A>
using the <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> instance associated with the current thread.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#checkNotSealed()">checkNotSealed</A></B>()</CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../org/mozilla/javascript/GeneratedClassLoader.html" title="interface in org.mozilla.javascript">GeneratedClassLoader</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#createClassLoader(java.lang.ClassLoader)">createClassLoader</A></B>(java.lang.ClassLoader parent)</CODE>
<BR>
Create class loader for generated classes.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#doTopCall(org.mozilla.javascript.Callable, org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[])">doTopCall</A></B>(<A HREF="../../../org/mozilla/javascript/Callable.html" title="interface in org.mozilla.javascript">Callable</A> callable,
<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx,
<A HREF="../../../org/mozilla/javascript/Scriptable.html" title="interface in org.mozilla.javascript">Scriptable</A> scope,
<A HREF="../../../org/mozilla/javascript/Scriptable.html" title="interface in org.mozilla.javascript">Scriptable</A> thisObj,
java.lang.Object[] args)</CODE>
<BR>
Execute top call to script or function.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#enter()">enter</A></B>()</CODE>
<BR>
<B>Deprecated.</B> <I>use <A HREF="../../../org/mozilla/javascript/ContextFactory.html#enterContext()"><CODE>enterContext()</CODE></A> instead</I></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#enterContext()">enterContext</A></B>()</CODE>
<BR>
Get a context associated with the current thread, creating one if need
be.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#enterContext(org.mozilla.javascript.Context)">enterContext</A></B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx)</CODE>
<BR>
Get a Context associated with the current thread, using the given
Context if need be.</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/ContextFactory.html#exit()">exit</A></B>()</CODE>
<BR>
<B>Deprecated.</B> <I>Use <A HREF="../../../org/mozilla/javascript/Context.html#exit()"><CODE>Context.exit()</CODE></A> instead.</I></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.ClassLoader</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#getApplicationClassLoader()">getApplicationClassLoader</A></B>()</CODE>
<BR>
Get ClassLoader to use when searching for Java classes.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected org.mozilla.javascript.xml.XMLLib.Factory</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#getE4xImplementationFactory()">getE4xImplementationFactory</A></B>()</CODE>
<BR>
Provides a default
<CODE>XMLLib.Factory</CODE>
to be used by the <code>Context</code> instances produced by this
factory.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static <A HREF="../../../org/mozilla/javascript/ContextFactory.html" title="class in org.mozilla.javascript">ContextFactory</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#getGlobal()">getGlobal</A></B>()</CODE>
<BR>
Get global ContextFactory.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#hasExplicitGlobal()">hasExplicitGlobal</A></B>()</CODE>
<BR>
Check if global factory was set.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#hasFeature(org.mozilla.javascript.Context, int)">hasFeature</A></B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx,
int featureIndex)</CODE>
<BR>
Implementation of <A HREF="../../../org/mozilla/javascript/Context.html#hasFeature(int)"><CODE>Context.hasFeature(int featureIndex)</CODE></A>.</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/ContextFactory.html#initApplicationClassLoader(java.lang.ClassLoader)">initApplicationClassLoader</A></B>(java.lang.ClassLoader loader)</CODE>
<BR>
Set explicit class loader to use when searching for Java classes.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#initGlobal(org.mozilla.javascript.ContextFactory)">initGlobal</A></B>(<A HREF="../../../org/mozilla/javascript/ContextFactory.html" title="class in org.mozilla.javascript">ContextFactory</A> factory)</CODE>
<BR>
Set global ContextFactory.</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/ContextFactory.html#isSealed()">isSealed</A></B>()</CODE>
<BR>
Checks if this is a sealed ContextFactory.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#makeContext()">makeContext</A></B>()</CODE>
<BR>
Create new <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> instance to be associated with the current
thread.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#observeInstructionCount(org.mozilla.javascript.Context, int)">observeInstructionCount</A></B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx,
int instructionCount)</CODE>
<BR>
Implementation of
<A HREF="../../../org/mozilla/javascript/Context.html#observeInstructionCount(int)"><CODE>Context.observeInstructionCount(int instructionCount)</CODE></A>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#onContextCreated(org.mozilla.javascript.Context)">onContextCreated</A></B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx)</CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/mozilla/javascript/ContextFactory.html#onContextReleased(org.mozilla.javascript.Context)">onContextReleased</A></B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx)</CODE>
<BR>
</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/ContextFactory.html#removeListener(org.mozilla.javascript.ContextFactory.Listener)">removeListener</A></B>(<A HREF="../../../org/mozilla/javascript/ContextFactory.Listener.html" title="interface in org.mozilla.javascript">ContextFactory.Listener</A> listener)</CODE>
<BR>
</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/ContextFactory.html#seal()">seal</A></B>()</CODE>
<BR>
Seal this ContextFactory so any attempt to modify it like to add or
remove its listeners will throw an exception.</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 ======== -->
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<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="ContextFactory()"><!-- --></A><H3>
ContextFactory</H3>
<PRE>
public <B>ContextFactory</B>()</PRE>
<DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
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<B>Method Detail</B></FONT></TH>
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</TABLE>
<A NAME="getGlobal()"><!-- --></A><H3>
getGlobal</H3>
<PRE>
public static <A HREF="../../../org/mozilla/javascript/ContextFactory.html" title="class in org.mozilla.javascript">ContextFactory</A> <B>getGlobal</B>()</PRE>
<DL>
<DD>Get global ContextFactory.
<P>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ContextFactory.html#hasExplicitGlobal()"><CODE>hasExplicitGlobal()</CODE></A>,
<A HREF="../../../org/mozilla/javascript/ContextFactory.html#initGlobal(org.mozilla.javascript.ContextFactory)"><CODE>initGlobal(ContextFactory)</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="hasExplicitGlobal()"><!-- --></A><H3>
hasExplicitGlobal</H3>
<PRE>
public static boolean <B>hasExplicitGlobal</B>()</PRE>
<DL>
<DD>Check if global factory was set.
Return true to indicate that <A HREF="../../../org/mozilla/javascript/ContextFactory.html#initGlobal(org.mozilla.javascript.ContextFactory)"><CODE>initGlobal(ContextFactory)</CODE></A> was
already called and false to indicate that the global factory was not
explicitly set.
<P>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ContextFactory.html#getGlobal()"><CODE>getGlobal()</CODE></A>,
<A HREF="../../../org/mozilla/javascript/ContextFactory.html#initGlobal(org.mozilla.javascript.ContextFactory)"><CODE>initGlobal(ContextFactory)</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="initGlobal(org.mozilla.javascript.ContextFactory)"><!-- --></A><H3>
initGlobal</H3>
<PRE>
public static void <B>initGlobal</B>(<A HREF="../../../org/mozilla/javascript/ContextFactory.html" title="class in org.mozilla.javascript">ContextFactory</A> factory)</PRE>
<DL>
<DD>Set global ContextFactory.
The method can only be called once.
<P>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ContextFactory.html#getGlobal()"><CODE>getGlobal()</CODE></A>,
<A HREF="../../../org/mozilla/javascript/ContextFactory.html#hasExplicitGlobal()"><CODE>hasExplicitGlobal()</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="makeContext()"><!-- --></A><H3>
makeContext</H3>
<PRE>
protected <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> <B>makeContext</B>()</PRE>
<DL>
<DD>Create new <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> instance to be associated with the current
thread.
This is a callback method used by Rhino to create <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A>
instance when it is necessary to associate one with the current
execution thread. <tt>makeContext()</tt> is allowed to call
<A HREF="../../../org/mozilla/javascript/Context.html#seal(java.lang.Object)"><CODE>Context.seal(Object)</CODE></A> on the result to prevent
<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> changes by hostile scripts or applets.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="hasFeature(org.mozilla.javascript.Context, int)"><!-- --></A><H3>
hasFeature</H3>
<PRE>
protected boolean <B>hasFeature</B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx,
int featureIndex)</PRE>
<DL>
<DD>Implementation of <A HREF="../../../org/mozilla/javascript/Context.html#hasFeature(int)"><CODE>Context.hasFeature(int featureIndex)</CODE></A>.
This can be used to customize <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> without introducing
additional subclasses.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getE4xImplementationFactory()"><!-- --></A><H3>
getE4xImplementationFactory</H3>
<PRE>
protected org.mozilla.javascript.xml.XMLLib.Factory <B>getE4xImplementationFactory</B>()</PRE>
<DL>
<DD>Provides a default
<CODE>XMLLib.Factory</CODE>
to be used by the <code>Context</code> instances produced by this
factory. See <A HREF="../../../org/mozilla/javascript/Context.html#getE4xImplementationFactory()"><CODE>Context.getE4xImplementationFactory()</CODE></A> for details.
May return null, in which case E4X functionality is not supported in
Rhino.
The default implementation now prefers the DOM3 E4X implementation.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="createClassLoader(java.lang.ClassLoader)"><!-- --></A><H3>
createClassLoader</H3>
<PRE>
protected <A HREF="../../../org/mozilla/javascript/GeneratedClassLoader.html" title="interface in org.mozilla.javascript">GeneratedClassLoader</A> <B>createClassLoader</B>(java.lang.ClassLoader parent)</PRE>
<DL>
<DD>Create class loader for generated classes.
This method creates an instance of the default implementation
of <A HREF="../../../org/mozilla/javascript/GeneratedClassLoader.html" title="interface in org.mozilla.javascript"><CODE>GeneratedClassLoader</CODE></A>. Rhino uses this interface to load
generated JVM classes when no <A HREF="../../../org/mozilla/javascript/SecurityController.html" title="class in org.mozilla.javascript"><CODE>SecurityController</CODE></A>
is installed.
Application can override the method to provide custom class loading.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getApplicationClassLoader()"><!-- --></A><H3>
getApplicationClassLoader</H3>
<PRE>
public final java.lang.ClassLoader <B>getApplicationClassLoader</B>()</PRE>
<DL>
<DD>Get ClassLoader to use when searching for Java classes.
Unless it was explicitly initialized with
<A HREF="../../../org/mozilla/javascript/ContextFactory.html#initApplicationClassLoader(java.lang.ClassLoader)"><CODE>initApplicationClassLoader(ClassLoader)</CODE></A> the method returns
null to indicate that Thread.getContextClassLoader() should be used.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="initApplicationClassLoader(java.lang.ClassLoader)"><!-- --></A><H3>
initApplicationClassLoader</H3>
<PRE>
public final void <B>initApplicationClassLoader</B>(java.lang.ClassLoader loader)</PRE>
<DL>
<DD>Set explicit class loader to use when searching for Java classes.
<P>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ContextFactory.html#getApplicationClassLoader()"><CODE>getApplicationClassLoader()</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="doTopCall(org.mozilla.javascript.Callable, org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[])"><!-- --></A><H3>
doTopCall</H3>
<PRE>
protected java.lang.Object <B>doTopCall</B>(<A HREF="../../../org/mozilla/javascript/Callable.html" title="interface in org.mozilla.javascript">Callable</A> callable,
<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx,
<A HREF="../../../org/mozilla/javascript/Scriptable.html" title="interface in org.mozilla.javascript">Scriptable</A> scope,
<A HREF="../../../org/mozilla/javascript/Scriptable.html" title="interface in org.mozilla.javascript">Scriptable</A> thisObj,
java.lang.Object[] args)</PRE>
<DL>
<DD>Execute top call to script or function.
When the runtime is about to execute a script or function that will
create the first stack frame with scriptable code, it calls this method
to perform the real call. In this way execution of any script
happens inside this function.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="observeInstructionCount(org.mozilla.javascript.Context, int)"><!-- --></A><H3>
observeInstructionCount</H3>
<PRE>
protected void <B>observeInstructionCount</B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx,
int instructionCount)</PRE>
<DL>
<DD>Implementation of
<A HREF="../../../org/mozilla/javascript/Context.html#observeInstructionCount(int)"><CODE>Context.observeInstructionCount(int instructionCount)</CODE></A>.
This can be used to customize <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> without introducing
additional subclasses.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="onContextCreated(org.mozilla.javascript.Context)"><!-- --></A><H3>
onContextCreated</H3>
<PRE>
protected void <B>onContextCreated</B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="onContextReleased(org.mozilla.javascript.Context)"><!-- --></A><H3>
onContextReleased</H3>
<PRE>
protected void <B>onContextReleased</B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="addListener(org.mozilla.javascript.ContextFactory.Listener)"><!-- --></A><H3>
addListener</H3>
<PRE>
public final void <B>addListener</B>(<A HREF="../../../org/mozilla/javascript/ContextFactory.Listener.html" title="interface in org.mozilla.javascript">ContextFactory.Listener</A> listener)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="removeListener(org.mozilla.javascript.ContextFactory.Listener)"><!-- --></A><H3>
removeListener</H3>
<PRE>
public final void <B>removeListener</B>(<A HREF="../../../org/mozilla/javascript/ContextFactory.Listener.html" title="interface in org.mozilla.javascript">ContextFactory.Listener</A> listener)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="isSealed()"><!-- --></A><H3>
isSealed</H3>
<PRE>
public final boolean <B>isSealed</B>()</PRE>
<DL>
<DD>Checks if this is a sealed ContextFactory.
<P>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ContextFactory.html#seal()"><CODE>seal()</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="seal()"><!-- --></A><H3>
seal</H3>
<PRE>
public final void <B>seal</B>()</PRE>
<DL>
<DD>Seal this ContextFactory so any attempt to modify it like to add or
remove its listeners will throw an exception.
<P>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ContextFactory.html#isSealed()"><CODE>isSealed()</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="checkNotSealed()"><!-- --></A><H3>
checkNotSealed</H3>
<PRE>
protected final void <B>checkNotSealed</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="call(org.mozilla.javascript.ContextAction)"><!-- --></A><H3>
call</H3>
<PRE>
public final java.lang.Object <B>call</B>(<A HREF="../../../org/mozilla/javascript/ContextAction.html" title="interface in org.mozilla.javascript">ContextAction</A> action)</PRE>
<DL>
<DD>Call <A HREF="../../../org/mozilla/javascript/ContextAction.html#run(org.mozilla.javascript.Context)"><CODE>ContextAction.run(Context cx)</CODE></A>
using the <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript"><CODE>Context</CODE></A> instance associated with the current thread.
If no Context is associated with the thread, then
<A HREF="../../../org/mozilla/javascript/ContextFactory.html#makeContext()"><CODE>makeContext()</CODE></A> will be called to construct
new Context instance. The instance will be temporary associated
with the thread during call to <A HREF="../../../org/mozilla/javascript/ContextAction.html#run(org.mozilla.javascript.Context)"><CODE>ContextAction.run(Context)</CODE></A>.
<P>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ContextFactory.html#call(org.mozilla.javascript.ContextAction)"><CODE>call(ContextAction)</CODE></A>,
<A HREF="../../../org/mozilla/javascript/Context.html#call(org.mozilla.javascript.ContextFactory, org.mozilla.javascript.Callable, org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable, java.lang.Object[])"><CODE>Context.call(ContextFactory factory, Callable callable,
Scriptable scope, Scriptable thisObj,
Object[] args)</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="enterContext()"><!-- --></A><H3>
enterContext</H3>
<PRE>
public <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> <B>enterContext</B>()</PRE>
<DL>
<DD>Get a context associated with the current thread, creating one if need
be. The Context stores the execution state of the JavaScript engine, so
it is required that the context be entered before execution may begin.
Once a thread has entered a Context, then getCurrentContext() may be
called to find the context that is associated with the current thread.
<p>
Calling <code>enterContext()</code> will return either the Context
currently associated with the thread, or will create a new context and
associate it with the current thread. Each call to
<code>enterContext()</code> must have a matching call to
<A HREF="../../../org/mozilla/javascript/Context.html#exit()"><CODE>Context.exit()</CODE></A>.
<pre>
Context cx = contextFactory.enterContext();
try {
...
cx.evaluateString(...);
} finally {
Context.exit();
}
</pre>
Instead of using <tt>enterContext()</tt>, <tt>exit()</tt> pair consider
using <A HREF="../../../org/mozilla/javascript/ContextFactory.html#call(org.mozilla.javascript.ContextAction)"><CODE>call(ContextAction)</CODE></A> which guarantees proper association
of Context instances with the current thread.
With this method the above example becomes:
<pre>
ContextFactory.call(new ContextAction() {
public Object run(Context cx) {
...
cx.evaluateString(...);
return null;
}
});
</pre>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>a Context associated with the current thread<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/Context.html#getCurrentContext()"><CODE>Context.getCurrentContext()</CODE></A>,
<A HREF="../../../org/mozilla/javascript/Context.html#exit()"><CODE>Context.exit()</CODE></A>,
<A HREF="../../../org/mozilla/javascript/ContextFactory.html#call(org.mozilla.javascript.ContextAction)"><CODE>call(ContextAction)</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="enter()"><!-- --></A><H3>
enter</H3>
<PRE>
public final <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> <B>enter</B>()</PRE>
<DL>
<DD><B>Deprecated.</B> <I>use <A HREF="../../../org/mozilla/javascript/ContextFactory.html#enterContext()"><CODE>enterContext()</CODE></A> instead</I>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>a Context associated with the current thread</DL>
</DD>
</DL>
<HR>
<A NAME="exit()"><!-- --></A><H3>
exit</H3>
<PRE>
public final void <B>exit</B>()</PRE>
<DL>
<DD><B>Deprecated.</B> <I>Use <A HREF="../../../org/mozilla/javascript/Context.html#exit()"><CODE>Context.exit()</CODE></A> instead.</I>
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="enterContext(org.mozilla.javascript.Context)"><!-- --></A><H3>
enterContext</H3>
<PRE>
public final <A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> <B>enterContext</B>(<A HREF="../../../org/mozilla/javascript/Context.html" title="class in org.mozilla.javascript">Context</A> cx)</PRE>
<DL>
<DD>Get a Context associated with the current thread, using the given
Context if need be.
<p>
The same as <code>enterContext()</code> except that <code>cx</code>
is associated with the current thread and returned if the current thread
has no associated context and <code>cx</code> is not associated with any
other thread.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>cx</CODE> - a Context to associate with the thread if possible
<DT><B>Returns:</B><DD>a Context associated with the current thread
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalStateException</CODE> - if <code>cx</code> is already associated
with a different thread<DT><B>See Also:</B><DD><A HREF="../../../org/mozilla/javascript/ContextFactory.html#enterContext()"><CODE>enterContext()</CODE></A>,
<A HREF="../../../org/mozilla/javascript/ContextFactory.html#call(org.mozilla.javascript.ContextAction)"><CODE>call(ContextAction)</CODE></A></DL>
</DD>
</DL>
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