implicitobjectelresolver.html

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 the name of a JSP implicit object, throws
 <code>PropertyNotWritableException</code> to indicate that implicit
 objects cannot be overwritten.

 <p>The <code>propertyResolved</code> property of the 
 <code>ELContext</code> object must be set to <code>true</code> by 
 this resolver before returning if an implicit object is matched. If 
 this property is not <code>true</code> after this method is called,
 the caller should ignore the return value.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../javax/el/ELResolver.html#setValue(javax.el.ELContext, java.lang.Object, java.lang.Object, java.lang.Object)">setValue</A></CODE> in class <CODE><A HREF="../../../../javax/el/ELResolver.html" title="class in javax.el">ELResolver</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>context</CODE> - The context of this evaluation.<DD><CODE>base</CODE> - Only <code>null</code> is handled by this resolver.
     Other values will result in an immediate return.<DD><CODE>property</CODE> - The name of the implicit object.<DD><CODE>val</CODE> - The value to be associated with the implicit object.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/NullPointerException.html" title="class or interface in java.lang">NullPointerException</A></CODE> - if context is <code>null</code>.
<DD><CODE><A HREF="../../../../javax/el/PropertyNotWritableException.html" title="class in javax.el">PropertyNotWritableException</A></CODE> - always thrown, if the 
     implicit object name is recognized by this resolver.
<DD><CODE><A HREF="../../../../javax/servlet/jsp/el/ELException.html" title="class in javax.servlet.jsp.el">ELException</A></CODE> - if an exception was thrown while performing
     the property or variable resolution. The thrown exception
     must be included as the cause property of this exception, if
     available.</DL>
</DD>
</DL>
<HR>

<A NAME="isReadOnly(javax.el.ELContext, java.lang.Object, java.lang.Object)"><!-- --></A><H3>
isReadOnly</H3>
<PRE>
public boolean <B>isReadOnly</B>(<A HREF="../../../../javax/el/ELContext.html" title="class in javax.el">ELContext</A>&nbsp;context,
                          <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;base,
                          <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;property)</PRE>
<DL>
<DD>If the base object is <code>null</code>, and the property matches
 the name of a JSP implicit object, returns <code>true</code>
 to indicate that implicit objects cannot be overwritten.

 <p>The <code>propertyResolved</code> property of the 
 <code>ELContext</code> object must be set to <code>true</code> by 
 this resolver before returning if an implicit object is matched. If 
 this property is not <code>true</code> after this method is called,
 the caller should ignore the return value.</p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../javax/el/ELResolver.html#isReadOnly(javax.el.ELContext, java.lang.Object, java.lang.Object)">isReadOnly</A></CODE> in class <CODE><A HREF="../../../../javax/el/ELResolver.html" title="class in javax.el">ELResolver</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>context</CODE> - The context of this evaluation.<DD><CODE>base</CODE> - Only <code>null</code> is handled by this resolver.
     Other values will result in an immediate return.<DD><CODE>property</CODE> - The name of the implicit object.
<DT><B>Returns:</B><DD>If the <code>propertyResolved</code> property of 
     <code>ELContext</code> was set to <code>true</code>, then
     <code>true</code>; otherwise undefined.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/NullPointerException.html" title="class or interface in java.lang">NullPointerException</A></CODE> - if context is <code>null</code>.
<DD><CODE><A HREF="../../../../javax/servlet/jsp/el/ELException.html" title="class in javax.servlet.jsp.el">ELException</A></CODE> - if an exception was thrown while performing
     the property or variable resolution. The thrown exception
     must be included as the cause property of this exception, if
     available.</DL>
</DD>
</DL>
<HR>

<A NAME="getFeatureDescriptors(javax.el.ELContext, java.lang.Object)"><!-- --></A><H3>
getFeatureDescriptors</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/util/Iterator.html" title="class or interface in java.util">Iterator</A>&lt;<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/beans/FeatureDescriptor.html" title="class or interface in java.beans">FeatureDescriptor</A>&gt; <B>getFeatureDescriptors</B>(<A HREF="../../../../javax/el/ELContext.html" title="class in javax.el">ELContext</A>&nbsp;context,
                                                         <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;base)</PRE>
<DL>
<DD>If the base object is <code>null</code>, and the property matches
 the name of a JSP implicit object, returns an <code>Iterator</code>
 containing <code>FeatureDescriptor</code> objects with information
 about each JSP implicit object resolved by this resolver. Otherwise,
 returns <code>null</code>.

 <p>The <code>Iterator</code> returned must contain one instance of 
 <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/beans/FeatureDescriptor.html" title="class or interface in java.beans"><CODE>FeatureDescriptor</CODE></A> for each of the EL implicit objects
 defined by the JSP spec. Each info object contains information about 
 a single implicit object, and is initialized as follows:
 <dl>
     <li>displayName - The name of the implicit object.</li>
     <li>name - Same as displayName property.</li>
     <li>shortDescription - A suitable description for the implicit
         object. Will vary by implementation.</li>
     <li>expert - <code>false</code></li>
     <li>hidden - <code>false</code></li>
     <li>preferred - <code>true</code></li>
 </dl>
 In addition, the following named attributes must be set in the
 returned <code>FeatureDescriptor</code>s:
 <dl>
     <li><A HREF="../../../../javax/el/ELResolver.html#TYPE"><CODE>ELResolver.TYPE</CODE></A> - The runtime type of the implicit object.</li>
     <li><A HREF="../../../../javax/el/ELResolver.html#RESOLVABLE_AT_DESIGN_TIME"><CODE>ELResolver.RESOLVABLE_AT_DESIGN_TIME</CODE></A> - <code>true</code>.</li>
 </dl></p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../javax/el/ELResolver.html#getFeatureDescriptors(javax.el.ELContext, java.lang.Object)">getFeatureDescriptors</A></CODE> in class <CODE><A HREF="../../../../javax/el/ELResolver.html" title="class in javax.el">ELResolver</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>context</CODE> - The context of this evaluation.<DD><CODE>base</CODE> - Only <code>null</code> is handled by this resolver.
     Other values will result in a <code>null</code> return value.
<DT><B>Returns:</B><DD>An <code>Iterator</code> containing one 
     <code>FeatureDescriptor</code> object for each implicit object, or
     <code>null</code> if <code>base</code> is not <code>null</code>.<DT><B>See Also:</B><DD><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/beans/FeatureDescriptor.html" title="class or interface in java.beans"><CODE>FeatureDescriptor</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getCommonPropertyType(javax.el.ELContext, java.lang.Object)"><!-- --></A><H3>
getCommonPropertyType</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Class.html" title="class or interface in java.lang">Class</A>&lt;<A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&gt; <B>getCommonPropertyType</B>(<A HREF="../../../../javax/el/ELContext.html" title="class in javax.el">ELContext</A>&nbsp;context,
                                           <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;base)</PRE>
<DL>
<DD>If the base object is <code>null</code>, returns 
 <code>String.class</code>.  Otherwise, returns <code>null</code>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../javax/el/ELResolver.html#getCommonPropertyType(javax.el.ELContext, java.lang.Object)">getCommonPropertyType</A></CODE> in class <CODE><A HREF="../../../../javax/el/ELResolver.html" title="class in javax.el">ELResolver</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>context</CODE> - The context of this evaluation.<DD><CODE>base</CODE> - Only <code>null</code> is handled by this resolver.
     Other values will result in a <code>null</code> return value.
<DT><B>Returns:</B><DD><code>null</code> if base is not <code>null</code>; otherwise
     <code>String.class</code>.</DL>
</DD>
</DL>
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