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<A NAME="addELResolver(javax.el.ELResolver)"><!-- --></A><H3>
addELResolver</H3>
<PRE>
void <B>addELResolver</B>(<A HREF="../../../javax/el/ELResolver.html" title="class in javax.el">ELResolver</A>&nbsp;resolver)</PRE>
<DL>
<DD>Adds an <code>ELResolver</code> to affect the way EL variables
 and properties are resolved for EL expressions appearing in JSP pages
 and tag files.

 <p>For example, in the EL expression ${employee.lastName}, an
 <code>ELResolver</code> determines what object "employee"
 references and how to find its "lastName" property.</p>

 <p>When evaluating an expression, the JSP container will consult a
 set of standard resolvers as well as any resolvers registered via
 this method. The set of resolvers are consulted in the following
 order:
 <ul>
   <li><A HREF="../../../javax/servlet/jsp/el/ImplicitObjectELResolver.html" title="class in javax.servlet.jsp.el"><CODE>ImplicitObjectELResolver</CODE></A></li>
   <li><code>ELResolver</code>s registered via this method, in the
       order in which they are registered.</li>
   <li><A HREF="../../../javax/el/MapELResolver.html" title="class in javax.el"><CODE>MapELResolver</CODE></A></li>
   <li><A HREF="../../../javax/el/ListELResolver.html" title="class in javax.el"><CODE>ListELResolver</CODE></A></li>
   <li><A HREF="../../../javax/el/ArrayELResolver.html" title="class in javax.el"><CODE>ArrayELResolver</CODE></A></li>
   <li><A HREF="../../../javax/el/BeanELResolver.html" title="class in javax.el"><CODE>BeanELResolver</CODE></A></li>
   <li><A HREF="../../../javax/servlet/jsp/el/ScopedAttributeELResolver.html" title="class in javax.servlet.jsp.el"><CODE>ScopedAttributeELResolver</CODE></A></li>
 </ul></p>

 <p>It is illegal to register an <code>ELResolver</code> after the
 application has received any request from the client. If an
 attempt is made to register an <code>ELResolver</code> after that time,
 an <code>IllegalStateException</code> is thrown.</p>
 This restriction is
 in place to allow the JSP container to optimize for the common
 case where no additional <code>ELResolver</code>s are in the chain,
 aside from the standard ones. It is permissible to add
 <code>ELResolver</code>s before or after initialization to
 a <code>CompositeELResolver</code> that is already in the chain.</p>

 <p>It is not possible to remove an <code>ELResolver</code> registered
 with this method, once it has been registered.</p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>resolver</CODE> - The new <code>ELResolver</code>
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if an attempt is made to
     call this method after all <code>ServletContextListener</code>s
     have had their <code>contextInitialized</code> methods invoked.</DL>
</DD>
</DL>
<HR>

<A NAME="getExpressionFactory()"><!-- --></A><H3>
getExpressionFactory</H3>
<PRE>
<A HREF="../../../javax/el/ExpressionFactory.html" title="class in javax.el">ExpressionFactory</A> <B>getExpressionFactory</B>()</PRE>
<DL>
<DD>Returns a factory used to create <code>ValueExpression</code>s and
 <code>MethodExpression</code>s so that EL expressions can be
 parsed and evaluated.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>A concrete implementation of the
     an <code>ExpressionFactory</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="addELContextListener(javax.el.ELContextListener)"><!-- --></A><H3>
addELContextListener</H3>
<PRE>
void <B>addELContextListener</B>(<A HREF="../../../javax/el/ELContextListener.html" title="interface in javax.el">ELContextListener</A>&nbsp;listener)</PRE>
<DL>
<DD>Registers a <code>ELContextListener</code>s so that context objects
 can be added whenever a new <code>ELContext</code> is created.

 <p>At a minimum, the <code>ELContext</code> objects created will
 contain a reference to the <code>JspContext</code> for this request,
 which is added by the JSP container.
 This is sufficient for all the
 default <code>ELResolver</code>s listed in <A HREF="../../../javax/servlet/jsp/JspApplicationContext.html#addELResolver(javax.el.ELResolver)"><CODE>addELResolver(javax.el.ELResolver)</CODE></A>.
 Note that <code>JspContext.class</code> is used as the key to ELContext.putContext()
 for the <code>JspContext</code> object reference.</p>

 <p>This method is generally used by frameworks and applications that
 register their own <code>ELResolver</code> that needs context other
 than <code>JspContext</code>. The listener will typically add the
 necessary context to the <code>ELContext</code> provided in the
 event object. Registering a listener that adds context allows the
 <code>ELResolver</code>s in the stack to access the context they
 need when they do a resolution.</p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>listener</CODE> - The listener to be notified when a new
     <code>ELContext</code> is created.</DL>
</DD>
</DL>
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