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<ul class="subNavList">
<li>Summary: </li>
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<div class="subTitle"><span class="packageLabelInType">Package</span> <a href="../../javax/el/package-summary.html">javax.el</a></div>
<h2 title="Class ELResolver" class="title">Class ELResolver</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>javax.el.ELResolver</li>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><code><a href="../../javax/el/ArrayELResolver.html" title="class in javax.el">ArrayELResolver</a></code>, <code><a href="../../javax/el/BeanELResolver.html" title="class in javax.el">BeanELResolver</a></code>, <code><a href="../../javax/el/BeanNameELResolver.html" title="class in javax.el">BeanNameELResolver</a></code>, <code><a href="../../javax/el/CompositeELResolver.html" title="class in javax.el">CompositeELResolver</a></code>, <code><a href="../../javax/servlet/jsp/el/ImplicitObjectELResolver.html" title="class in javax.servlet.jsp.el">ImplicitObjectELResolver</a></code>, <code><a href="../../javax/el/ListELResolver.html" title="class in javax.el">ListELResolver</a></code>, <code><a href="../../javax/el/MapELResolver.html" title="class in javax.el">MapELResolver</a></code>, <code><a href="../../javax/el/ResourceBundleELResolver.html" title="class in javax.el">ResourceBundleELResolver</a></code>, <code><a href="../../javax/servlet/jsp/el/ScopedAttributeELResolver.html" title="class in javax.servlet.jsp.el">ScopedAttributeELResolver</a></code>, <code><a href="../../javax/el/StaticFieldELResolver.html" title="class in javax.el">StaticFieldELResolver</a></code>, <code><a href="../../javax/el/TypeConverter.html" title="class in javax.el">TypeConverter</a></code></dd>
</dl>
<hr>
<pre>public abstract class <span class="typeNameLabel">ELResolver</span>
extends java.lang.Object</pre>
<dl>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Jacob Hookom [jacob/hookom.net]</dd>
</dl>
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<h3>Field Summary</h3>
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<caption><span>Fields</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Field</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#RESOLVABLE_AT_DESIGN_TIME">RESOLVABLE_AT_DESIGN_TIME</a></span></code></th>
<td class="colLast"> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#TYPE">TYPE</a></span></code></th>
<td class="colLast"> </td>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#ELResolver--">ELResolver</a></span>()</code></th>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><code>java.lang.Object</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#convertToType-javax.el.ELContext-java.lang.Object-java.lang.Class-">convertToType</a></span>​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object obj,
java.lang.Class<?> type)</code></th>
<td class="colLast">
<div class="block">Converts the given object to the given type.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>abstract java.lang.Class<?></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#getCommonPropertyType-javax.el.ELContext-java.lang.Object-">getCommonPropertyType</a></span>​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base)</code></th>
<td class="colLast"> </td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>abstract java.util.Iterator<java.beans.FeatureDescriptor></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#getFeatureDescriptors-javax.el.ELContext-java.lang.Object-">getFeatureDescriptors</a></span>​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base)</code></th>
<td class="colLast"> </td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>abstract java.lang.Class<?></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#getType-javax.el.ELContext-java.lang.Object-java.lang.Object-">getType</a></span>​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object property)</code></th>
<td class="colLast"> </td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>abstract java.lang.Object</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#getValue-javax.el.ELContext-java.lang.Object-java.lang.Object-">getValue</a></span>​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object property)</code></th>
<td class="colLast"> </td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#invoke-javax.el.ELContext-java.lang.Object-java.lang.Object-java.lang.Class:A-java.lang.Object:A-">invoke</a></span>​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object method,
java.lang.Class<?>[] paramTypes,
java.lang.Object[] params)</code></th>
<td class="colLast">
<div class="block">Invokes a method on the the given object.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>abstract boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#isReadOnly-javax.el.ELContext-java.lang.Object-java.lang.Object-">isReadOnly</a></span>​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object property)</code></th>
<td class="colLast"> </td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>abstract void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../javax/el/ELResolver.html#setValue-javax.el.ELContext-java.lang.Object-java.lang.Object-java.lang.Object-">setValue</a></span>​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object property,
java.lang.Object value)</code></th>
<td class="colLast"> </td>
</tr>
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<h3>Methods inherited from class java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h3>Field Detail</h3>
<a name="TYPE">
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<h4>TYPE</h4>
<pre>public static final java.lang.String TYPE</pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../constant-values.html#javax.el.ELResolver.TYPE">Constant Field Values</a></dd>
</dl>
</li>
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<h4>RESOLVABLE_AT_DESIGN_TIME</h4>
<pre>public static final java.lang.String RESOLVABLE_AT_DESIGN_TIME</pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../constant-values.html#javax.el.ELResolver.RESOLVABLE_AT_DESIGN_TIME">Constant Field Values</a></dd>
</dl>
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</ul>
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<h3>Constructor Detail</h3>
<a name="ELResolver--">
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<h4>ELResolver</h4>
<pre>public ELResolver()</pre>
</li>
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<h4>getValue</h4>
<pre>public abstract java.lang.Object getValue​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object property)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - The EL context for this evaluation</dd>
<dd><code>base</code> - The base object on which the property is to be found</dd>
<dd><code>property</code> - The property whose value is to be returned</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value of the provided property</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - If the supplied context is <code>null</code></dd>
<dd><code><a href="../../javax/el/PropertyNotFoundException.html" title="class in javax.el">PropertyNotFoundException</a></code> - If the base/property combination provided to the resolver is
one that the resolver can handle but no match was found or a
match was found but was not readable</dd>
<dd><code><a href="../../javax/el/ELException.html" title="class in javax.el">ELException</a></code> - Wraps any exception throw whilst resolving the property</dd>
</dl>
</li>
</ul>
<a name="invoke-javax.el.ELContext-java.lang.Object-java.lang.Object-java.lang.Class:A-java.lang.Object:A-">
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<h4>invoke</h4>
<pre>public java.lang.Object invoke​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object method,
java.lang.Class<?>[] paramTypes,
java.lang.Object[] params)</pre>
<div class="block">Invokes a method on the the given object. This default implementation
always returns <code>null</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - The EL context for this evaluation</dd>
<dd><code>base</code> - The base object on which the method is to be found</dd>
<dd><code>method</code> - The method to invoke</dd>
<dd><code>paramTypes</code> - The types of the parameters of the method to invoke</dd>
<dd><code>params</code> - The parameters with which to invoke the method</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Always <code>null</code></dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>EL 2.2</dd>
</dl>
</li>
</ul>
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<h4>getType</h4>
<pre>public abstract java.lang.Class<?> getType​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object property)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - The EL context for this evaluation</dd>
<dd><code>base</code> - The base object on which the property is to be found</dd>
<dd><code>property</code> - The property whose type is to be returned</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the type of the provided property</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - If the supplied context is <code>null</code></dd>
<dd><code><a href="../../javax/el/PropertyNotFoundException.html" title="class in javax.el">PropertyNotFoundException</a></code> - If the base/property combination provided to the resolver is
one that the resolver can handle but no match was found or a
match was found but was not readable</dd>
<dd><code><a href="../../javax/el/ELException.html" title="class in javax.el">ELException</a></code> - Wraps any exception throw whilst resolving the property</dd>
</dl>
</li>
</ul>
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<h4>setValue</h4>
<pre>public abstract void setValue​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object property,
java.lang.Object value)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - The EL context for this evaluation</dd>
<dd><code>base</code> - The base object on which the property is to be found</dd>
<dd><code>property</code> - The property whose value is to be set</dd>
<dd><code>value</code> - The value to set the property to</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - If the supplied context is <code>null</code></dd>
<dd><code><a href="../../javax/el/PropertyNotFoundException.html" title="class in javax.el">PropertyNotFoundException</a></code> - If the base/property combination provided to the resolver is
one that the resolver can handle but no match was found</dd>
<dd><code><a href="../../javax/el/PropertyNotWritableException.html" title="class in javax.el">PropertyNotWritableException</a></code> - If the base/property combination provided to the resolver is
one that the resolver can handle but the property was not
writable</dd>
<dd><code><a href="../../javax/el/ELException.html" title="class in javax.el">ELException</a></code> - Wraps any exception throw whilst resolving the property</dd>
</dl>
</li>
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<h4>isReadOnly</h4>
<pre>public abstract boolean isReadOnly​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base,
java.lang.Object property)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - The EL context for this evaluation</dd>
<dd><code>base</code> - The base object on which the property is to be found</dd>
<dd><code>property</code> - The property to be checked for read only status</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>true</code> if the identified property is read only,
otherwise <code>false</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.NullPointerException</code> - If the supplied context is <code>null</code></dd>
<dd><code><a href="../../javax/el/PropertyNotFoundException.html" title="class in javax.el">PropertyNotFoundException</a></code> - If the base/property combination provided to the resolver is
one that the resolver can handle but no match was found</dd>
<dd><code><a href="../../javax/el/ELException.html" title="class in javax.el">ELException</a></code> - Wraps any exception throw whilst resolving the property</dd>
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<h4>getFeatureDescriptors</h4>
<pre>public abstract java.util.Iterator<java.beans.FeatureDescriptor> getFeatureDescriptors​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base)</pre>
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<h4>getCommonPropertyType</h4>
<pre>public abstract java.lang.Class<?> getCommonPropertyType​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object base)</pre>
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<h4>convertToType</h4>
<pre>public java.lang.Object convertToType​(<a href="../../javax/el/ELContext.html" title="class in javax.el">ELContext</a> context,
java.lang.Object obj,
java.lang.Class<?> type)</pre>
<div class="block">Converts the given object to the given type. This default implementation
always returns <code>null</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - The EL context for this evaluation</dd>
<dd><code>obj</code> - The object to convert</dd>
<dd><code>type</code> - The type to which the object should be converted</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Always <code>null</code></dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>EL 3.0</dd>
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