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<h1 title="Package" class="title">Package javax.servlet.jsp.tagext</h1>
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<div class="block">Classes and interfaces for the definition of JavaServer Pages Tag Libraries.
<p>
The JavaServer Pages(tm) (JSP) 2.0 specification provides a portable
mechanism for the description of tag libraries.
<p>
A JSP tag library contains
<ul>
<li>A Tag Library Descriptor</li>
<li>A number of Tag Files or Tag handler classes defining
request-time behavior</li>
<li>Additional classes and resources used at runtime</li>
<li>Possibly some additional classes to provide extra translation
information</li>
</ul>
<p>
The JSP 2.0 specification and the reference implementation both contain
simple and moderately complex examples of actions defined using this
mechanism. These are available at JSP's web site, at
<a href="http://java.sun.com/products/jsp">http://java.sun.com/products/jsp</a>.
Some readers may want to consult those to get a quick feel for how
the mechanisms work together.</div>
<ul class="blockList">
<li class="blockList">
<table class="typeSummary" summary="Interface Summary table, listing interfaces, and an explanation">
<caption><span>Interface Summary</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/BodyTag.html" title="interface in javax.servlet.jsp.tagext">BodyTag</a></th>
<td class="colLast">
<div class="block">The BodyTag interface extends IterationTag by defining additional methods
that let a tag handler manipulate the content of evaluating its body.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/DynamicAttributes.html" title="interface in javax.servlet.jsp.tagext">DynamicAttributes</a></th>
<td class="colLast">
<div class="block">For a tag to declare that it accepts dynamic attributes, it must implement
this interface.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/IterationTag.html" title="interface in javax.servlet.jsp.tagext">IterationTag</a></th>
<td class="colLast">
<div class="block">The IterationTag interface extends Tag by defining one additional
method that controls the reevaluation of its body.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/JspIdConsumer.html" title="interface in javax.servlet.jsp.tagext">JspIdConsumer</a></th>
<td class="colLast"> </td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/JspTag.html" title="interface in javax.servlet.jsp.tagext">JspTag</a></th>
<td class="colLast">
<div class="block">Serves as a base class for Tag and SimpleTag.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/SimpleTag.html" title="interface in javax.servlet.jsp.tagext">SimpleTag</a></th>
<td class="colLast">
<div class="block">Interface for defining Simple Tag Handlers.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/Tag.html" title="interface in javax.servlet.jsp.tagext">Tag</a></th>
<td class="colLast">
<div class="block">The interface of a classic tag handler that does not want to manipulate
its body.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TryCatchFinally.html" title="interface in javax.servlet.jsp.tagext">TryCatchFinally</a></th>
<td class="colLast">
<div class="block">The auxiliary interface of a Tag, IterationTag or BodyTag tag
handler that wants additional hooks for managing resources.</div>
</td>
</tr>
</tbody>
</table>
</li>
<li class="blockList">
<table class="typeSummary" summary="Class Summary table, listing classes, and an explanation">
<caption><span>Class Summary</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tbody>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/BodyContent.html" title="class in javax.servlet.jsp.tagext">BodyContent</a></th>
<td class="colLast">
<div class="block">An encapsulation of the evaluation of the body of an action so it is
available to a tag handler.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/BodyTagSupport.html" title="class in javax.servlet.jsp.tagext">BodyTagSupport</a></th>
<td class="colLast">
<div class="block">A base class for defining tag handlers implementing BodyTag.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/FunctionInfo.html" title="class in javax.servlet.jsp.tagext">FunctionInfo</a></th>
<td class="colLast">
<div class="block">Information for a function in a Tag Library.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/JspFragment.html" title="class in javax.servlet.jsp.tagext">JspFragment</a></th>
<td class="colLast">
<div class="block">Encapsulates a portion of JSP code in an object that
can be invoked as many times as needed.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/PageData.html" title="class in javax.servlet.jsp.tagext">PageData</a></th>
<td class="colLast">
<div class="block">Translation-time information on a JSP page.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/SimpleTagSupport.html" title="class in javax.servlet.jsp.tagext">SimpleTagSupport</a></th>
<td class="colLast">
<div class="block">A base class for defining tag handlers implementing SimpleTag.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagAdapter.html" title="class in javax.servlet.jsp.tagext">TagAdapter</a></th>
<td class="colLast">
<div class="block">Wraps any SimpleTag and exposes it using a Tag interface.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagAttributeInfo.html" title="class in javax.servlet.jsp.tagext">TagAttributeInfo</a></th>
<td class="colLast">
<div class="block">Information on the attributes of a Tag, available at translation time.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagData.html" title="class in javax.servlet.jsp.tagext">TagData</a></th>
<td class="colLast">
<div class="block">The (translation-time only) attribute/value information for a tag instance.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagExtraInfo.html" title="class in javax.servlet.jsp.tagext">TagExtraInfo</a></th>
<td class="colLast">
<div class="block">Optional class provided by the tag library author to describe additional
translation-time information not described in the TLD.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagFileInfo.html" title="class in javax.servlet.jsp.tagext">TagFileInfo</a></th>
<td class="colLast">
<div class="block">Tag information for a tag file in a Tag Library;
This class is instantiated from the Tag Library Descriptor file (TLD)
and is available only at translation time.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagInfo.html" title="class in javax.servlet.jsp.tagext">TagInfo</a></th>
<td class="colLast">
<div class="block">Tag information for a tag in a Tag Library;
This class is instantiated from the Tag Library Descriptor file (TLD)
and is available only at translation time.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagLibraryInfo.html" title="class in javax.servlet.jsp.tagext">TagLibraryInfo</a></th>
<td class="colLast">
<div class="block">Translation-time information associated with a taglib directive, and its
underlying TLD file.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagLibraryValidator.html" title="class in javax.servlet.jsp.tagext">TagLibraryValidator</a></th>
<td class="colLast">
<div class="block">Translation-time validator class for a JSP page.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagSupport.html" title="class in javax.servlet.jsp.tagext">TagSupport</a></th>
<td class="colLast">
<div class="block">A base class for defining new tag handlers implementing Tag.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/TagVariableInfo.html" title="class in javax.servlet.jsp.tagext">TagVariableInfo</a></th>
<td class="colLast">
<div class="block">Variable information for a tag in a Tag Library; This class is instantiated
from the Tag Library Descriptor file (TLD) and is available only at
translation time.</div>
</td>
</tr>
<tr class="altColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/ValidationMessage.html" title="class in javax.servlet.jsp.tagext">ValidationMessage</a></th>
<td class="colLast">
<div class="block">A validation message from either TagLibraryValidator or TagExtraInfo.</div>
</td>
</tr>
<tr class="rowColor">
<th class="colFirst" scope="row"><a href="../../../../javax/servlet/jsp/tagext/VariableInfo.html" title="class in javax.servlet.jsp.tagext">VariableInfo</a></th>
<td class="colLast">
<div class="block">Information on the scripting variables that are created/modified by a tag (at
run-time).</div>
</td>
</tr>
</tbody>
</table>
</li>
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