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<h2 title="Class Expression" class="title">Class Expression</h2>
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<li>java.lang.Object</li>
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<div class="block"><strong>Deprecated.</strong>
<div class="block"><i>As of JSP 2.1, replaced by javax.el.ValueExpression</i></div>
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<pre>public abstract class <span class="strong">Expression</span>
extends java.lang.Object</pre>
<div class="block"><p>The abstract class for a prepared expression.</p>
<p>An instance of an Expression can be obtained via from an
ExpressionEvaluator instance.</p>
<p>An Expression may or not have done a syntactic parse of the expression.
A client invoking the evaluate() method should be ready for the case
where ELParseException exceptions are raised. </p></div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>2.0</dd></dl>
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<td class="colOne"><code><strong><a href="../../../../javax/servlet/jsp/el/Expression.html#Expression()">Expression</a></strong>()</code>
<div class="block"><strong>Deprecated.</strong> </div>
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<td class="colFirst"><code>abstract java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../javax/servlet/jsp/el/Expression.html#evaluate(javax.servlet.jsp.el.VariableResolver)">evaluate</a></strong>(<a href="../../../../javax/servlet/jsp/el/VariableResolver.html" title="interface in javax.servlet.jsp.el">VariableResolver</a> vResolver)</code>
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<div class="block">Evaluates an expression that was previously prepared.</div>
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<h4>Expression</h4>
<pre>public Expression()</pre>
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<h4>evaluate</h4>
<pre>public abstract java.lang.Object evaluate(<a href="../../../../javax/servlet/jsp/el/VariableResolver.html" title="interface in javax.servlet.jsp.el">VariableResolver</a> vResolver)
throws <a href="../../../../javax/servlet/jsp/el/ELException.html" title="class in javax.servlet.jsp.el">ELException</a></pre>
<div class="block"><span class="strong">Deprecated.</span> </div>
<div class="block">Evaluates an expression that was previously prepared. In some
implementations preparing an expression involves full syntactic
validation, but others may not do so. Evaluating the expression may
raise an ELParseException as well as other ELExceptions due to
run-time evaluation.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>vResolver</code> - A VariableResolver instance that can be used at
runtime to resolve the name of implicit objects into Objects.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The result of the expression evaluation.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../javax/servlet/jsp/el/ELException.html" title="class in javax.servlet.jsp.el">ELException</a></code> - Thrown if the expression evaluation failed.</dd></dl>
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