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| <div class="subTitle">javax.servlet.jsp.tagext</div> |
| <h2 title="Class TagLibraryValidator" class="title">Class TagLibraryValidator</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../../../javax/servlet/jsp/jstl/tlv/PermittedTaglibsTLV.html" title="class in javax.servlet.jsp.jstl.tlv">PermittedTaglibsTLV</a>, <a href="../../../../javax/servlet/jsp/jstl/tlv/ScriptFreeTLV.html" title="class in javax.servlet.jsp.jstl.tlv">ScriptFreeTLV</a></dd> |
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| <pre>public abstract class <span class="typeNameLabel">TagLibraryValidator</span> |
| extends java.lang.Object</pre> |
| <div class="block">Translation-time validator class for a JSP page. A validator operates on the XML view associated with the JSP page. |
| |
| <p> |
| The TLD file associates a TagLibraryValidator class and some init arguments with a tag library. |
| |
| <p> |
| The JSP container is reponsible for locating an appropriate instance of the appropriate subclass by |
| |
| <ul> |
| <li>new a fresh instance, or reuse an available one |
| <li>invoke the setInitParams(Map) method on the instance |
| </ul> |
| |
| once initialized, the validate(String, String, PageData) method will be invoked, where the first two arguments are |
| the prefix and uri for this tag library in the XML View. The prefix is intended to make it easier to produce an error |
| message. However, it is not always accurate. In the case where a single URI is mapped to more than one prefix in the |
| XML view, the prefix of the first URI is provided. Therefore, to provide high quality error messages in cases where |
| the tag elements themselves are checked, the prefix parameter should be ignored and the actual prefix of the element |
| should be used instead. TagLibraryValidators should always use the uri to identify elements as beloning to the tag |
| library, not the prefix. |
| |
| <p> |
| A TagLibraryValidator instance may create auxiliary objects internally to perform the validation (e.g. an XSchema |
| validator) and may reuse it for all the pages in a given translation run. |
| |
| <p> |
| The JSP container is not guaranteed to serialize invocations of validate() method, and TagLibraryValidators should |
| perform any synchronization they may require. |
| |
| <p> |
| As of JSP 2.0, a JSP container must provide a jsp:id attribute to provide higher quality validation errors. The |
| container will track the JSP pages as passed to the container, and will assign to each element a unique "id", which |
| is passed as the value of the jsp:id attribute. Each XML element in the XML view available will be extended with this |
| attribute. The TagLibraryValidator can then use the attribute in one or more ValidationMessage objects. The container |
| then, in turn, can use these values to provide more precise information on the location of an error. |
| |
| <p> |
| The actual prefix of the <code>id</code> attribute may or may not be <code>jsp</code> but it will always map to the |
| namespace <code>http://java.sun.com/JSP/Page</code>. A TagLibraryValidator implementation must rely on the uri, not |
| the prefix, of the <code>id</code> attribute.</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagLibraryValidator.html#TagLibraryValidator--">TagLibraryValidator</a></span>()</code> |
| <div class="block">Sole constructor.</div> |
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| <td class="colFirst"><code>java.util.Map<java.lang.String,java.lang.Object></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagLibraryValidator.html#getInitParameters--">getInitParameters</a></span>()</code> |
| <div class="block">Get the init parameters data as an immutable Map.</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/servlet/jsp/tagext/TagLibraryValidator.html#release--">release</a></span>()</code> |
| <div class="block">Release any data kept by this instance for validation purposes.</div> |
| </td> |
| </tr> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagLibraryValidator.html#setInitParameters-java.util.Map-">setInitParameters</a></span>(java.util.Map<java.lang.String,java.lang.Object> map)</code> |
| <div class="block">Set the init data in the TLD for this validator.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../javax/servlet/jsp/tagext/ValidationMessage.html" title="class in javax.servlet.jsp.tagext">ValidationMessage</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/servlet/jsp/tagext/TagLibraryValidator.html#validate-java.lang.String-java.lang.String-javax.servlet.jsp.tagext.PageData-">validate</a></span>(java.lang.String prefix, |
| java.lang.String uri, |
| <a href="../../../../javax/servlet/jsp/tagext/PageData.html" title="class in javax.servlet.jsp.tagext">PageData</a> page)</code> |
| <div class="block">Validate a JSP page.</div> |
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| <h4>TagLibraryValidator</h4> |
| <pre>public TagLibraryValidator()</pre> |
| <div class="block">Sole constructor. (For invocation by subclass constructors, typically implicit.)</div> |
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| <h4>setInitParameters</h4> |
| <pre>public void setInitParameters(java.util.Map<java.lang.String,java.lang.Object> map)</pre> |
| <div class="block">Set the init data in the TLD for this validator. Parameter names are keys, and parameter values are the values.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>map</code> - A Map describing the init parameters</dd> |
| </dl> |
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| <h4>getInitParameters</h4> |
| <pre>public java.util.Map<java.lang.String,java.lang.Object> getInitParameters()</pre> |
| <div class="block">Get the init parameters data as an immutable Map. Parameter names are keys, and parameter values are the values.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>The init parameters as an immutable map.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="validate-java.lang.String-java.lang.String-javax.servlet.jsp.tagext.PageData-"> |
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| <h4>validate</h4> |
| <pre>public <a href="../../../../javax/servlet/jsp/tagext/ValidationMessage.html" title="class in javax.servlet.jsp.tagext">ValidationMessage</a>[] validate(java.lang.String prefix, |
| java.lang.String uri, |
| <a href="../../../../javax/servlet/jsp/tagext/PageData.html" title="class in javax.servlet.jsp.tagext">PageData</a> page)</pre> |
| <div class="block">Validate a JSP page. This will get invoked once per unique tag library URI in the XML view. This method will |
| return null if the page is valid; otherwise the method should return an array of ValidationMessage objects. An |
| array of length zero is also interpreted as no errors.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>prefix</code> - the first prefix with which the tag library is associated, in the XML view. Note that some tags may |
| use a different prefix if the namespace is redefined.</dd> |
| <dd><code>uri</code> - the tag library's unique identifier</dd> |
| <dd><code>page</code> - the JspData page object</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>A null object, or zero length array if no errors, an array of ValidationMessages otherwise.</dd> |
| </dl> |
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| <h4>release</h4> |
| <pre>public void release()</pre> |
| <div class="block">Release any data kept by this instance for validation purposes.</div> |
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