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<h2 title="Class TagData" class="title">Class TagData</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>javax.servlet.jsp.tagext.TagData</li>
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<pre>public class <span class="typeNameLabel">TagData</span>
extends java.lang.Object
implements java.lang.Cloneable</pre>
<div class="block">The (translation-time only) attribute/value information for a tag instance.
<p>
TagData is only used as an argument to the isValid, validate, and
getVariableInfo methods of TagExtraInfo, which are invoked at
translation time.</div>
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<td class="colFirst"><code>static java.lang.Object</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagData.html#REQUEST_TIME_VALUE">REQUEST_TIME_VALUE</a></span></code></th>
<td class="colLast">
<div class="block">Distinguished value for an attribute to indicate its value
is a request-time expression (which is not yet available because
TagData instances are used at translation-time).</div>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagData.html#TagData-java.lang.Object:A:A-">TagData</a></span>​(java.lang.Object[][] atts)</code></th>
<td class="colLast">
<div class="block">Constructor for TagData.</div>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagData.html#TagData-java.util.Hashtable-">TagData</a></span>​(java.util.Hashtable<java.lang.String,java.lang.Object> attrs)</code></th>
<td class="colLast">
<div class="block">Constructor for a TagData.</div>
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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/servlet/jsp/tagext/TagData.html#getAttribute-java.lang.String-">getAttribute</a></span>​(java.lang.String attName)</code></th>
<td class="colLast">
<div class="block">The value of the attribute.</div>
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<td class="colFirst"><code>java.util.Enumeration<java.lang.String></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagData.html#getAttributes--">getAttributes</a></span>()</code></th>
<td class="colLast">
<div class="block">Enumerates the attributes.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagData.html#getAttributeString-java.lang.String-">getAttributeString</a></span>​(java.lang.String attName)</code></th>
<td class="colLast">
<div class="block">Get the value for a given attribute.</div>
</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagData.html#getId--">getId</a></span>()</code></th>
<td class="colLast">
<div class="block">The value of the tag's id attribute.</div>
</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagData.html#setAttribute-java.lang.String-java.lang.Object-">setAttribute</a></span>​(java.lang.String attName,
java.lang.Object value)</code></th>
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<div class="block">Set the value of an attribute.</div>
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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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<h4>REQUEST_TIME_VALUE</h4>
<pre>public static final java.lang.Object REQUEST_TIME_VALUE</pre>
<div class="block">Distinguished value for an attribute to indicate its value
is a request-time expression (which is not yet available because
TagData instances are used at translation-time).</div>
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<h4>TagData</h4>
<pre>public TagData​(java.lang.Object[][] atts)</pre>
<div class="block">Constructor for TagData.
<p>
A typical constructor may be
<pre>
static final Object[][] att = {{"connection", "conn0"}, {"id", "query0"}};
static final TagData td = new TagData(att);
</pre>
All values must be Strings except for those holding the
distinguished object REQUEST_TIME_VALUE.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>atts</code> - the static attribute and values. May be null.</dd>
</dl>
</li>
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<h4>TagData</h4>
<pre>public TagData​(java.util.Hashtable<java.lang.String,java.lang.Object> attrs)</pre>
<div class="block">Constructor for a TagData.
If you already have the attributes in a hashtable, use this
constructor.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>attrs</code> - A hashtable to get the values from.</dd>
</dl>
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<h4>getId</h4>
<pre>public java.lang.String getId()</pre>
<div class="block">The value of the tag's id attribute.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the value of the tag's id attribute, or null if no such
attribute was specified.</dd>
</dl>
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<h4>getAttribute</h4>
<pre>public java.lang.Object getAttribute​(java.lang.String attName)</pre>
<div class="block">The value of the attribute.
If a static value is specified for an attribute that accepts a
request-time attribute expression then that static value is returned,
even if the value is provided in the body of a <jsp:attribute>
action. The distinguished object REQUEST_TIME_VALUE is only returned if
the value is specified as a request-time attribute expression
or via the <jsp:attribute> action with a body that contains
dynamic content (scriptlets, scripting expressions, EL expressions,
standard actions, or custom actions). Returns null if the attribute
is not set.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>attName</code> - the name of the attribute</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the attribute's value</dd>
</dl>
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<h4>setAttribute</h4>
<pre>public void setAttribute​(java.lang.String attName,
java.lang.Object value)</pre>
<div class="block">Set the value of an attribute.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>attName</code> - the name of the attribute</dd>
<dd><code>value</code> - the value.</dd>
</dl>
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<h4>getAttributeString</h4>
<pre>public java.lang.String getAttributeString​(java.lang.String attName)</pre>
<div class="block">Get the value for a given attribute.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>attName</code> - the name of the attribute</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the attribute value string</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.lang.ClassCastException</code> - if attribute value is not a String</dd>
</dl>
</li>
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<h4>getAttributes</h4>
<pre>public java.util.Enumeration<java.lang.String> getAttributes()</pre>
<div class="block">Enumerates the attributes.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>An enumeration of the attributes in a TagData</dd>
</dl>
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