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<div class="subTitle">javax.faces.validator</div>
<h2 title="Class MethodExpressionValidator" class="title">Class MethodExpressionValidator</h2>
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<li>javax.faces.validator.MethodExpressionValidator</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="http://docs.oracle.com/javase/8/docs/api/java/util/EventListener.html?is-external=true" title="class or interface in java.util">EventListener</a>, <a href="../../../javax/faces/component/StateHolder.html" title="interface in javax.faces.component">StateHolder</a>, <a href="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator">Validator</a></dd>
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<pre>public class <span class="typeNameLabel">MethodExpressionValidator</span>
extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator">Validator</a>, <a href="../../../javax/faces/component/StateHolder.html" title="interface in javax.faces.component">StateHolder</a></pre>
<div class="block"><p><strong
 class="changed_modified_2_0_rev_a">MethodExpressionValidator</strong>
 is a <a href="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><code>Validator</code></a> that wraps a <a href="../../../javax/el/MethodExpression.html" title="class in javax.el"><code>MethodExpression</code></a>, and it
 performs validation by executing a method on an object identified by
 the <a href="../../../javax/el/MethodExpression.html" title="class in javax.el"><code>MethodExpression</code></a>.</p></div>
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<h3>Fields inherited from interface&nbsp;javax.faces.validator.<a href="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator">Validator</a></h3>
<code><a href="../../../javax/faces/validator/Validator.html#NOT_IN_RANGE_MESSAGE_ID">NOT_IN_RANGE_MESSAGE_ID</a></code></li>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/faces/validator/MethodExpressionValidator.html#MethodExpressionValidator--">MethodExpressionValidator</a></span>()</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/faces/validator/MethodExpressionValidator.html#MethodExpressionValidator-javax.el.MethodExpression-">MethodExpressionValidator</a></span>(<a href="../../../javax/el/MethodExpression.html" title="class in javax.el">MethodExpression</a>&nbsp;methodExpression)</code>
<div class="block">Construct a <a href="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><code>Validator</code></a> that contains a <a href="../../../javax/el/MethodExpression.html" title="class in javax.el"><code>MethodExpression</code></a>.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/faces/validator/MethodExpressionValidator.html#isTransient--">isTransient</a></span>()</code>
<div class="block">If true, the Object implementing this interface must not
 participate in state saving or restoring.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/faces/validator/MethodExpressionValidator.html#restoreState-javax.faces.context.FacesContext-java.lang.Object-">restoreState</a></span>(<a href="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context">FacesContext</a>&nbsp;context,
            <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;state)</code>
<div class="block"><span class="changed_modified_2_0_rev_a">Perform</span> any
 processing required to restore the state from the entries in the
 state Object.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/faces/validator/MethodExpressionValidator.html#saveState-javax.faces.context.FacesContext-">saveState</a></span>(<a href="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context">FacesContext</a>&nbsp;context)</code>
<div class="block"> Gets the state of the instance as a
 <code>Serializable</code> Object.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/faces/validator/MethodExpressionValidator.html#setTransient-boolean-">setTransient</a></span>(boolean&nbsp;transientValue)</code>
<div class="block"><span class="changed_modified_2_0_rev_a">Denotes</span>
 whether or not the Object implementing this interface must or
 must not participate in state saving or restoring.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/faces/validator/MethodExpressionValidator.html#validate-javax.faces.context.FacesContext-javax.faces.component.UIComponent-java.lang.Object-">validate</a></span>(<a href="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context">FacesContext</a>&nbsp;context,
        <a href="../../../javax/faces/component/UIComponent.html" title="class in javax.faces.component">UIComponent</a>&nbsp;component,
        <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;value)</code>
<div class="block"><span class="changed_modified_2_0">Perform</span> the
 correctness checks implemented by this <a href="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><code>Validator</code></a> against
 the specified <a href="../../../javax/faces/component/UIComponent.html" title="class in javax.faces.component"><code>UIComponent</code></a>.</div>
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<code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h4>MethodExpressionValidator</h4>
<pre>public&nbsp;MethodExpressionValidator()</pre>
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<h4>MethodExpressionValidator</h4>
<pre>public&nbsp;MethodExpressionValidator(<a href="../../../javax/el/MethodExpression.html" title="class in javax.el">MethodExpression</a>&nbsp;methodExpression)</pre>
<div class="block"><p>Construct a <a href="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><code>Validator</code></a> that contains a <a href="../../../javax/el/MethodExpression.html" title="class in javax.el"><code>MethodExpression</code></a>.</p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>methodExpression</code> - the expression to wrap</dd>
</dl>
</li>
</ul>
</li>
</ul>
<!-- ============ METHOD DETAIL ========== -->
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<h3>Method Detail</h3>
<a name="validate-javax.faces.context.FacesContext-javax.faces.component.UIComponent-java.lang.Object-">
<!--   -->
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<h4>validate</h4>
<pre>public&nbsp;void&nbsp;validate(<a href="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context">FacesContext</a>&nbsp;context,
                     <a href="../../../javax/faces/component/UIComponent.html" title="class in javax.faces.component">UIComponent</a>&nbsp;component,
                     <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;value)
              throws <a href="../../../javax/faces/validator/ValidatorException.html" title="class in javax.faces.validator">ValidatorException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../javax/faces/validator/Validator.html#validate-javax.faces.context.FacesContext-javax.faces.component.UIComponent-T-">Validator</a></code></span></div>
<div class="block"><p><span class="changed_modified_2_0">Perform</span> the
 correctness checks implemented by this <a href="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator"><code>Validator</code></a> against
 the specified <a href="../../../javax/faces/component/UIComponent.html" title="class in javax.faces.component"><code>UIComponent</code></a>.  If any violations are found,
 a <a href="../../../javax/faces/validator/ValidatorException.html" title="class in javax.faces.validator"><code>ValidatorException</code></a> will be thrown containing the <a href="../../../javax/faces/application/FacesMessage.html" title="class in javax.faces.application"><code>FacesMessage</code></a> describing the failure.

 <div class="changed_added_2_0">

 <p>For a validator to be fully compliant with Version 2 and later
 of the specification, it must not fail validation on
 <code>null</code> or empty values unless it is specifically
 intended to address <code>null</code> or empty values.  An
 application-wide <code>&lt;context-param&gt;</code> is provided
 to allow validators designed for JSF 1.2 to work with JSF 2 and
 later. The <code>javax.faces.VALIDATE_EMPTY_FIELDS</code>
 <code>&lt;context-param&gt;</code> must be set to
 <code>false</code> to enable this backwards compatibility
 behavior.</p>

 </div></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../javax/faces/validator/Validator.html#validate-javax.faces.context.FacesContext-javax.faces.component.UIComponent-T-">validate</a></code>&nbsp;in interface&nbsp;<code><a href="../../../javax/faces/validator/Validator.html" title="interface in javax.faces.validator">Validator</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - FacesContext for the request we are processing</dd>
<dd><code>component</code> - UIComponent we are checking for correctness</dd>
<dd><code>value</code> - the value to validate</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if <code>context</code>
                              or <code>component</code> is <code>null</code></dd>
<dd><code><a href="../../../javax/faces/validator/ValidatorException.html" title="class in javax.faces.validator">ValidatorException</a></code> - if validation fails</dd>
</dl>
</li>
</ul>
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<h4>saveState</h4>
<pre>public&nbsp;<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;saveState(<a href="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context">FacesContext</a>&nbsp;context)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../javax/faces/component/StateHolder.html#saveState-javax.faces.context.FacesContext-">StateHolder</a></code></span></div>
<div class="block"><p> Gets the state of the instance as a
 <code>Serializable</code> Object.</p>

 <p>If the class that implements this interface has references to
 instances that implement StateHolder (such as a
 <code>UIComponent</code> with event handlers, validators, etc.)
 this method must call the <a href="../../../javax/faces/component/StateHolder.html#saveState-javax.faces.context.FacesContext-"><code>StateHolder.saveState(javax.faces.context.FacesContext)</code></a> method on all those
 instances as well.  <strong>This method must not save the state
 of children and facets.</strong> That is done via the <a href="../../../javax/faces/application/StateManager.html" title="class in javax.faces.application"><code>StateManager</code></a></p>

 <p>This method must not alter the state of the implementing
 object.  In other words, after executing this code:</p>

 <pre><code>
 Object state = component.saveState(facesContext);
 </code></pre>

 <p><code>component</code> should be the same as before executing
 it.</p>

 <p>The return from this method must be <code>Serializable</code></p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../javax/faces/component/StateHolder.html#saveState-javax.faces.context.FacesContext-">saveState</a></code>&nbsp;in interface&nbsp;<code><a href="../../../javax/faces/component/StateHolder.html" title="interface in javax.faces.component">StateHolder</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - the Faces context.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the saved state.</dd>
</dl>
</li>
</ul>
<a name="restoreState-javax.faces.context.FacesContext-java.lang.Object-">
<!--   -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>restoreState</h4>
<pre>public&nbsp;void&nbsp;restoreState(<a href="../../../javax/faces/context/FacesContext.html" title="class in javax.faces.context">FacesContext</a>&nbsp;context,
                         <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;state)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../javax/faces/component/StateHolder.html#restoreState-javax.faces.context.FacesContext-java.lang.Object-">StateHolder</a></code></span></div>
<div class="block"><p><span class="changed_modified_2_0_rev_a">Perform</span> any
 processing required to restore the state from the entries in the
 state Object.</p>

 <p>If the class that implements this interface has references to
 instances that also implement StateHolder (such as a
 <code>UIComponent</code> with event handlers, validators, etc.)
 this method must call the <a href="../../../javax/faces/component/StateHolder.html#restoreState-javax.faces.context.FacesContext-java.lang.Object-"><code>StateHolder.restoreState(javax.faces.context.FacesContext, java.lang.Object)</code></a> method on all those
 instances as well. </p>

 <p class="changed_modified_2_0_rev_a">If the <code>state</code>
 argument is <code>null</code>, take no action and return.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../javax/faces/component/StateHolder.html#restoreState-javax.faces.context.FacesContext-java.lang.Object-">restoreState</a></code>&nbsp;in interface&nbsp;<code><a href="../../../javax/faces/component/StateHolder.html" title="interface in javax.faces.component">StateHolder</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - the Faces context.</dd>
<dd><code>state</code> - the state.</dd>
</dl>
</li>
</ul>
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<h4>isTransient</h4>
<pre>public&nbsp;boolean&nbsp;isTransient()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../javax/faces/component/StateHolder.html#isTransient--">StateHolder</a></code></span></div>
<div class="block"><p>If true, the Object implementing this interface must not
 participate in state saving or restoring.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../javax/faces/component/StateHolder.html#isTransient--">isTransient</a></code>&nbsp;in interface&nbsp;<code><a href="../../../javax/faces/component/StateHolder.html" title="interface in javax.faces.component">StateHolder</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>true</code> if transient, <code>false</code> otherwise.</dd>
</dl>
</li>
</ul>
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<h4>setTransient</h4>
<pre>public&nbsp;void&nbsp;setTransient(boolean&nbsp;transientValue)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../javax/faces/component/StateHolder.html#setTransient-boolean-">StateHolder</a></code></span></div>
<div class="block"><p><span class="changed_modified_2_0_rev_a">Denotes</span>
 whether or not the Object implementing this interface must or
 must not participate in state saving or restoring.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../javax/faces/component/StateHolder.html#setTransient-boolean-">setTransient</a></code>&nbsp;in interface&nbsp;<code><a href="../../../javax/faces/component/StateHolder.html" title="interface in javax.faces.component">StateHolder</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>transientValue</code> - boolean pass <code>true</code> if this
 Object <span class="changed_modified_2_0_rev_a">will not
 participate</span> in state saving or restoring, otherwise pass
 <code>false</code>.</dd>
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