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<div class="subTitle">javax.servlet.jsp.tagext</div>
<h2 title="Class TagAttributeInfo" class="title">Class TagAttributeInfo</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>javax.servlet.jsp.tagext.TagAttributeInfo</li>
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<pre>public class <span class="typeNameLabel">TagAttributeInfo</span>
extends java.lang.Object</pre>
<div class="block">Information on the attributes of a Tag, available at translation time. This class is instantiated from the Tag
Library Descriptor file (TLD).
<p>
Only the information needed to generate code is included here. Other information like SCHEMA for validation belongs
elsewhere.
<p>
Note from the Expert Group:<br>
This should have been designed as an interface. Every time we change the TLD, we need to add a new constructor to
this class (not good). This class should only be instantiated by container implementations (not by JSP developers).</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#ID">ID</a></span></code>
<div class="block">"id" is wired in to be ID.</div>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#TagAttributeInfo-java.lang.String-boolean-java.lang.String-boolean-">TagAttributeInfo</a></span>(java.lang.String&nbsp;name,
boolean&nbsp;required,
java.lang.String&nbsp;type,
boolean&nbsp;reqTime)</code>
<div class="block">Constructor for TagAttributeInfo.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#TagAttributeInfo-java.lang.String-boolean-java.lang.String-boolean-boolean-">TagAttributeInfo</a></span>(java.lang.String&nbsp;name,
boolean&nbsp;required,
java.lang.String&nbsp;type,
boolean&nbsp;reqTime,
boolean&nbsp;fragment)</code>
<div class="block">JSP 2.0 Constructor for TagAttributeInfo.</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#TagAttributeInfo-java.lang.String-boolean-java.lang.String-boolean-boolean-java.lang.String-boolean-boolean-java.lang.String-java.lang.String-">TagAttributeInfo</a></span>(java.lang.String&nbsp;name,
boolean&nbsp;required,
java.lang.String&nbsp;type,
boolean&nbsp;reqTime,
boolean&nbsp;fragment,
java.lang.String&nbsp;description,
boolean&nbsp;deferredValue,
boolean&nbsp;deferredMethod,
java.lang.String&nbsp;expectedTypeName,
java.lang.String&nbsp;methodSignature)</code>
<div class="block">JSP 2.1 Constructor for TagAttributeInfo.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#canBeRequestTime--">canBeRequestTime</a></span>()</code>
<div class="block">Whether this attribute has been specified in the TLD as rtexprvalue.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#getDescription--">getDescription</a></span>()</code>
<div class="block">Gets the description string of this tag attribute.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#getExpectedTypeName--">getExpectedTypeName</a></span>()</code>
<div class="block">Returns the name of the expected type (as a String) of this deferred value attribute.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html" title="class in javax.servlet.jsp.tagext">TagAttributeInfo</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#getIdAttribute-javax.servlet.jsp.tagext.TagAttributeInfo:A-">getIdAttribute</a></span>(<a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html" title="class in javax.servlet.jsp.tagext">TagAttributeInfo</a>[]&nbsp;a)</code>
<div class="block">Convenience static method that goes through an array of TagAttributeInfo objects and looks for "id".</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#getMethodSignature--">getMethodSignature</a></span>()</code>
<div class="block">Returns the expected method signature of this deferred method attribute.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#getName--">getName</a></span>()</code>
<div class="block">The name of this attribute.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#getTypeName--">getTypeName</a></span>()</code>
<div class="block">The type (as a String) of this attribute.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#isDeferredMethod--">isDeferredMethod</a></span>()</code>
<div class="block">Returns <code>true</code> if this attribute is to be passed a <code>MethodExpression</code> so that expression
evaluation can be deferred.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#isDeferredValue--">isDeferredValue</a></span>()</code>
<div class="block">Returns <code>true</code> if this attribute is to be passed a <code>ValueExpression</code> so that expression
evaluation can be deferred.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#isFragment--">isFragment</a></span>()</code>
<div class="block">Whether this attribute is of type JspFragment.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#isRequired--">isRequired</a></span>()</code>
<div class="block">Whether this attribute is required.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html#toString--">toString</a></span>()</code>
<div class="block">Returns a String representation of this TagAttributeInfo, suitable for debugging purposes.</div>
</td>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<h3>Field Detail</h3>
<a name="ID">
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<h4>ID</h4>
<pre>public static final&nbsp;java.lang.String ID</pre>
<div class="block">"id" is wired in to be ID. There is no real benefit in having it be something else IDREFs are not handled any
differently.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../constant-values.html#javax.servlet.jsp.tagext.TagAttributeInfo.ID">Constant Field Values</a></dd>
</dl>
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<h4>TagAttributeInfo</h4>
<pre>public&nbsp;TagAttributeInfo(java.lang.String&nbsp;name,
boolean&nbsp;required,
java.lang.String&nbsp;type,
boolean&nbsp;reqTime)</pre>
<div class="block">Constructor for TagAttributeInfo. This class is to be instantiated only from the TagLibrary code under request
from some JSP code that is parsing a TLD (Tag Library Descriptor).</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - The name of the attribute.</dd>
<dd><code>required</code> - If this attribute is required in tag instances.</dd>
<dd><code>type</code> - The name of the type of the attribute.</dd>
<dd><code>reqTime</code> - Whether this attribute holds a request-time Attribute.</dd>
</dl>
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<h4>TagAttributeInfo</h4>
<pre>public&nbsp;TagAttributeInfo(java.lang.String&nbsp;name,
boolean&nbsp;required,
java.lang.String&nbsp;type,
boolean&nbsp;reqTime,
boolean&nbsp;fragment)</pre>
<div class="block">JSP 2.0 Constructor for TagAttributeInfo. This class is to be instantiated only from the TagLibrary code under
request from some JSP code that is parsing a TLD (Tag Library Descriptor).</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - The name of the attribute.</dd>
<dd><code>required</code> - If this attribute is required in tag instances.</dd>
<dd><code>type</code> - The name of the type of the attribute.</dd>
<dd><code>reqTime</code> - Whether this attribute holds a request-time Attribute.</dd>
<dd><code>fragment</code> - Whether this attribute is of type JspFragment</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>JSP 2.0</dd>
</dl>
</li>
</ul>
<a name="TagAttributeInfo-java.lang.String-boolean-java.lang.String-boolean-boolean-java.lang.String-boolean-boolean-java.lang.String-java.lang.String-">
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<h4>TagAttributeInfo</h4>
<pre>public&nbsp;TagAttributeInfo(java.lang.String&nbsp;name,
boolean&nbsp;required,
java.lang.String&nbsp;type,
boolean&nbsp;reqTime,
boolean&nbsp;fragment,
java.lang.String&nbsp;description,
boolean&nbsp;deferredValue,
boolean&nbsp;deferredMethod,
java.lang.String&nbsp;expectedTypeName,
java.lang.String&nbsp;methodSignature)</pre>
<div class="block">JSP 2.1 Constructor for TagAttributeInfo. This class is to be instantiated only from the TagLibrary code under
request from some JSP code that is parsing a TLD (Tag Library Descriptor).</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>name</code> - The name of the attribute.</dd>
<dd><code>required</code> - If this attribute is required in tag instances.</dd>
<dd><code>type</code> - The name of the type of the attribute.</dd>
<dd><code>reqTime</code> - Whether this attribute holds a request-time Attribute.</dd>
<dd><code>fragment</code> - Whether this attribute is of type JspFragment</dd>
<dd><code>description</code> - The description of the attribute.</dd>
<dd><code>deferredValue</code> - Whether this attribute is a deferred value.</dd>
<dd><code>deferredMethod</code> - Whether this attribute is a deferred method. rtexpr or deferred value.</dd>
<dd><code>expectedTypeName</code> - The name of the expected type of this deferred value (or <code>null</code> if this is not
a deferred value).</dd>
<dd><code>methodSignature</code> - The expected method signature of this deferred method (or <code>null</code> if this is
not a deferred method).</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>JSP 2.1</dd>
</dl>
</li>
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</li>
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<h4>getName</h4>
<pre>public&nbsp;java.lang.String&nbsp;getName()</pre>
<div class="block">The name of this attribute.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the name of the attribute</dd>
</dl>
</li>
</ul>
<a name="getTypeName--">
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<h4>getTypeName</h4>
<pre>public&nbsp;java.lang.String&nbsp;getTypeName()</pre>
<div class="block">The type (as a String) of this attribute.
<p>
This method must return <code>"javax.el.ValueExpression"</code> if <code>isDeferredValue()</code> returns
<code>true</code> and <code>canBeRequestTime()</code> returns <code>false</code>. It must return
<code>"javax.el.MethodExpression"</code> if <code>isDeferredMethod()</code> returns <code>true</code>. It must
return <code>"java.lang.Object"</code> if <code>isDeferredValue()</code> returns <code>true</code> and
<code>canBeRequestTime()</code> returns <code>true</code>.
</p></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the type of the attribute</dd>
</dl>
</li>
</ul>
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<h4>canBeRequestTime</h4>
<pre>public&nbsp;boolean&nbsp;canBeRequestTime()</pre>
<div class="block">Whether this attribute has been specified in the TLD as rtexprvalue. If <code>true</code>, this means the
attribute can hold a request-time value.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the attribute has been specified in the TLD as rtexprvalue</dd>
</dl>
</li>
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<a name="isRequired--">
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<h4>isRequired</h4>
<pre>public&nbsp;boolean&nbsp;isRequired()</pre>
<div class="block">Whether this attribute is required.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>if the attribute is required.</dd>
</dl>
</li>
</ul>
<a name="getIdAttribute-javax.servlet.jsp.tagext.TagAttributeInfo:A-">
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<h4>getIdAttribute</h4>
<pre>public static&nbsp;<a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html" title="class in javax.servlet.jsp.tagext">TagAttributeInfo</a>&nbsp;getIdAttribute(<a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html" title="class in javax.servlet.jsp.tagext">TagAttributeInfo</a>[]&nbsp;a)</pre>
<div class="block">Convenience static method that goes through an array of TagAttributeInfo objects and looks for "id".</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>a</code> - An array of TagAttributeInfo</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The TagAttributeInfo reference with name "id"</dd>
</dl>
</li>
</ul>
<a name="isFragment--">
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<h4>isFragment</h4>
<pre>public&nbsp;boolean&nbsp;isFragment()</pre>
<div class="block">Whether this attribute is of type JspFragment.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>if the attribute is of type JspFragment</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>JSP 2.0</dd>
</dl>
</li>
</ul>
<a name="getDescription--">
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</a>
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<h4>getDescription</h4>
<pre>public&nbsp;java.lang.String&nbsp;getDescription()</pre>
<div class="block">Gets the description string of this tag attribute.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the description string of this tag attribute</dd>
</dl>
</li>
</ul>
<a name="isDeferredValue--">
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</a>
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<h4>isDeferredValue</h4>
<pre>public&nbsp;boolean&nbsp;isDeferredValue()</pre>
<div class="block">Returns <code>true</code> if this attribute is to be passed a <code>ValueExpression</code> so that expression
evaluation can be deferred.
<p>
If this method returns <code>true</code>, then <code>getTypeName()</code> must return
<code>"javax.el.ValueExpression"</code>.
</p>
<p>
The <code>getExpectedType()</code> method can be used to retrieve the expected type this value expression will be
constructed with.
</p></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>true</code> if this attribute accepts a deferred value; <code>false</code> otherwise.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>JSP 2.1</dd>
</dl>
</li>
</ul>
<a name="isDeferredMethod--">
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<h4>isDeferredMethod</h4>
<pre>public&nbsp;boolean&nbsp;isDeferredMethod()</pre>
<div class="block">Returns <code>true</code> if this attribute is to be passed a <code>MethodExpression</code> so that expression
evaluation can be deferred.
<p>
If this method returns <code>true</code>, then <code>getTypeName()</code> must return
<code>"javax.el.MethodExpression"</code>.
</p>
<p>
The <code>getMethodSignature()</code> method can be used to retrieve the expected method signature this method
expression will be constructed with.
</p></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>true</code> if this attribute accepts a deferred method; <code>false</code> otherwise.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>JSP 2.1</dd>
</dl>
</li>
</ul>
<a name="getExpectedTypeName--">
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<h4>getExpectedTypeName</h4>
<pre>public&nbsp;java.lang.String&nbsp;getExpectedTypeName()</pre>
<div class="block">Returns the name of the expected type (as a String) of this deferred value attribute.
<p>
This method returns <code>null</code> if <code>isDeferredValue()</code> returns <code>false</code>.
</p></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the name of the expected type</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>JSP 2.1</dd>
</dl>
</li>
</ul>
<a name="getMethodSignature--">
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<h4>getMethodSignature</h4>
<pre>public&nbsp;java.lang.String&nbsp;getMethodSignature()</pre>
<div class="block">Returns the expected method signature of this deferred method attribute.
<p>
This method returns <code>null</code> if <code>isDeferredMethod()</code> returns <code>false</code>.
</p></div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the method signature</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>JSP 2.1</dd>
</dl>
</li>
</ul>
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</a>
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<h4>toString</h4>
<pre>public&nbsp;java.lang.String&nbsp;toString()</pre>
<div class="block">Returns a String representation of this TagAttributeInfo, suitable for debugging purposes.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>toString</code>&nbsp;in class&nbsp;<code>java.lang.Object</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a String representation of this TagAttributeInfo</dd>
</dl>
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