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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"><span class="deprecatedLabel">Deprecated.</span> |
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| <br> |
| <pre>public abstract class <span class="typeNameLabel">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. |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/el/Expression.html#Expression--">Expression</a></span>()</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
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| <td class="colFirst"><code>abstract java.lang.Object</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/el/Expression.html#evaluate-javax.servlet.jsp.el.VariableResolver-">evaluate</a></span>(<a href="../../../../javax/servlet/jsp/el/VariableResolver.html" title="interface in javax.servlet.jsp.el">VariableResolver</a> vResolver)</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| <div class="block">Evaluates an expression that was previously prepared.</div> |
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| <h4>Expression</h4> |
| <pre>public Expression()</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
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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="deprecatedLabel">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="paramLabel">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="returnLabel">Returns:</span></dt> |
| <dd>The result of the expression evaluation.</dd> |
| <dt><span class="throwsLabel">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> |
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