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apache / shiro-site / 01016f43374d9b054f3ea1e568b015d5d69428f9 / . / src / site / assets / static / 1.2.4 / apidocs / src-html / org / apache / shiro / web / tags / UserTag.html
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<FONT color="green">001</FONT> /*<a name="line.1"></a>
<FONT color="green">002</FONT> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<FONT color="green">003</FONT> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<FONT color="green">004</FONT> * distributed with this work for additional information<a name="line.4"></a>
<FONT color="green">005</FONT> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<FONT color="green">006</FONT> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<FONT color="green">007</FONT> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<FONT color="green">008</FONT> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<FONT color="green">009</FONT> *<a name="line.9"></a>
<FONT color="green">010</FONT> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<FONT color="green">011</FONT> *<a name="line.11"></a>
<FONT color="green">012</FONT> * Unless required by applicable law or agreed to in writing,<a name="line.12"></a>
<FONT color="green">013</FONT> * software distributed under the License is distributed on an<a name="line.13"></a>
<FONT color="green">014</FONT> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a>
<FONT color="green">015</FONT> * KIND, either express or implied. See the License for the<a name="line.15"></a>
<FONT color="green">016</FONT> * specific language governing permissions and limitations<a name="line.16"></a>
<FONT color="green">017</FONT> * under the License.<a name="line.17"></a>
<FONT color="green">018</FONT> */<a name="line.18"></a>
<FONT color="green">019</FONT> package org.apache.shiro.web.tags;<a name="line.19"></a>
<FONT color="green">020</FONT> <a name="line.20"></a>
<FONT color="green">021</FONT> import javax.servlet.jsp.JspException;<a name="line.21"></a>
<FONT color="green">022</FONT> <a name="line.22"></a>
<FONT color="green">023</FONT> import org.slf4j.Logger;<a name="line.23"></a>
<FONT color="green">024</FONT> import org.slf4j.LoggerFactory;<a name="line.24"></a>
<FONT color="green">025</FONT> <a name="line.25"></a>
<FONT color="green">026</FONT> <a name="line.26"></a>
<FONT color="green">027</FONT> /**<a name="line.27"></a>
<FONT color="green">028</FONT> * JSP tag that renders the tag body if the current user known to the system, either from a successful login attempt<a name="line.28"></a>
<FONT color="green">029</FONT> * (not necessarily during the current session) or from 'RememberMe' services.<a name="line.29"></a>
<FONT color="green">030</FONT> *<a name="line.30"></a>
<FONT color="green">031</FONT> * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; This is &lt;em&gt;less&lt;/em&gt; restrictive than the &lt;code&gt;AuthenticatedTag&lt;/code&gt; since it only assumes<a name="line.31"></a>
<FONT color="green">032</FONT> * the user is who they say they are, either via a current session login &lt;em&gt;or&lt;/em&gt; via Remember Me services, which<a name="line.32"></a>
<FONT color="green">033</FONT> * makes no guarantee the user is who they say they are. The &lt;code&gt;AuthenticatedTag&lt;/code&gt; however<a name="line.33"></a>
<FONT color="green">034</FONT> * guarantees that the current user has logged in &lt;em&gt;during their current session&lt;/em&gt;, proving they really are<a name="line.34"></a>
<FONT color="green">035</FONT> * who they say they are.<a name="line.35"></a>
<FONT color="green">036</FONT> *<a name="line.36"></a>
<FONT color="green">037</FONT> * &lt;p&gt;The logically opposite tag of this one is the {@link org.apache.shiro.web.tags.GuestTag}.<a name="line.37"></a>
<FONT color="green">038</FONT> *<a name="line.38"></a>
<FONT color="green">039</FONT> * @since 0.9<a name="line.39"></a>
<FONT color="green">040</FONT> */<a name="line.40"></a>
<FONT color="green">041</FONT> public class UserTag extends SecureTag {<a name="line.41"></a>
<FONT color="green">042</FONT> <a name="line.42"></a>
<FONT color="green">043</FONT> //TODO - complete JavaDoc<a name="line.43"></a>
<FONT color="green">044</FONT> <a name="line.44"></a>
<FONT color="green">045</FONT> private static final Logger log = LoggerFactory.getLogger(UserTag.class);<a name="line.45"></a>
<FONT color="green">046</FONT> <a name="line.46"></a>
<FONT color="green">047</FONT> public int onDoStartTag() throws JspException {<a name="line.47"></a>
<FONT color="green">048</FONT> if (getSubject() != null &amp;&amp; getSubject().getPrincipal() != null) {<a name="line.48"></a>
<FONT color="green">049</FONT> if (log.isTraceEnabled()) {<a name="line.49"></a>
<FONT color="green">050</FONT> log.trace("Subject has known identity (aka 'principal'). " +<a name="line.50"></a>
<FONT color="green">051</FONT> "Tag body will be evaluated.");<a name="line.51"></a>
<FONT color="green">052</FONT> }<a name="line.52"></a>
<FONT color="green">053</FONT> return EVAL_BODY_INCLUDE;<a name="line.53"></a>
<FONT color="green">054</FONT> } else {<a name="line.54"></a>
<FONT color="green">055</FONT> if (log.isTraceEnabled()) {<a name="line.55"></a>
<FONT color="green">056</FONT> log.trace("Subject does not exist or have a known identity (aka 'principal'). " +<a name="line.56"></a>
<FONT color="green">057</FONT> "Tag body will not be evaluated.");<a name="line.57"></a>
<FONT color="green">058</FONT> }<a name="line.58"></a>
<FONT color="green">059</FONT> return SKIP_BODY;<a name="line.59"></a>
<FONT color="green">060</FONT> }<a name="line.60"></a>
<FONT color="green">061</FONT> }<a name="line.61"></a>
<FONT color="green">062</FONT> <a name="line.62"></a>
<FONT color="green">063</FONT> }<a name="line.63"></a>
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