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| <pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * the License. You may obtain a copy of the License at<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * <a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * <a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * See the License for the specific language governing permissions and<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * limitations under the License.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> */<a name="line.16"></a> |
| <span class="sourceLineNo">017</span>package org.apache.mina.integration.ognl;<a name="line.17"></a> |
| <span class="sourceLineNo">018</span><a name="line.18"></a> |
| <span class="sourceLineNo">019</span>import java.util.LinkedHashSet;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.util.Set;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span><a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import ognl.Ognl;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import ognl.OgnlContext;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import ognl.OgnlException;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import ognl.TypeConverter;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span><a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.mina.core.session.IoSession;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span><a name="line.28"></a> |
| <span class="sourceLineNo">029</span>/**<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> * Finds {@link IoSession}s that match a boolean OGNL expression.<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> * <a name="line.31"></a> |
| <span class="sourceLineNo">032</span> * @author <a href="http://mina.apache.org">Apache MINA Project</a><a name="line.32"></a> |
| <span class="sourceLineNo">033</span> */<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>public class IoSessionFinder {<a name="line.34"></a> |
| <span class="sourceLineNo">035</span><a name="line.35"></a> |
| <span class="sourceLineNo">036</span> private final String query;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span> private final TypeConverter typeConverter = new PropertyTypeConverter();<a name="line.38"></a> |
| <span class="sourceLineNo">039</span><a name="line.39"></a> |
| <span class="sourceLineNo">040</span> private final Object expression;<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> /**<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * Creates a new instance with the specified OGNL expression that returns<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> * a boolean value (e.g. <tt>"id == 0x12345678"</tt>).<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> * <a name="line.45"></a> |
| <span class="sourceLineNo">046</span> * @param query The OGNL expression <a name="line.46"></a> |
| <span class="sourceLineNo">047</span> */<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> public IoSessionFinder(String query) {<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> if (query == null) {<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> throw new IllegalArgumentException("query");<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> }<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> query = query.trim();<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> <a name="line.54"></a> |
| <span class="sourceLineNo">055</span> if (query.length() == 0) {<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> throw new IllegalArgumentException("query is empty.");<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> }<a name="line.57"></a> |
| <span class="sourceLineNo">058</span><a name="line.58"></a> |
| <span class="sourceLineNo">059</span> this.query = query;<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> <a name="line.60"></a> |
| <span class="sourceLineNo">061</span> try {<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> expression = Ognl.parseExpression(query);<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> } catch (OgnlException e) {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> throw new IllegalArgumentException("query: " + query);<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> }<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> }<a name="line.66"></a> |
| <span class="sourceLineNo">067</span><a name="line.67"></a> |
| <span class="sourceLineNo">068</span> /**<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> * Finds a {@link Set} of {@link IoSession}s that matches the query<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> * from the specified sessions and returns the matches.<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> * @throws OgnlException if failed to evaluate the OGNL expression<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> * <a name="line.72"></a> |
| <span class="sourceLineNo">073</span> * @param sessions The list of sessions to check<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> * @return A set of the session that matches the query<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * @throws OgnlException If we can't find a boolean value in a session's context<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> */<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> public Set<IoSession> find(Iterable<IoSession> sessions) throws OgnlException {<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> if (sessions == null) {<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> throw new IllegalArgumentException("sessions");<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> }<a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> Set<IoSession> answer = new LinkedHashSet<IoSession>();<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> <a name="line.83"></a> |
| <span class="sourceLineNo">084</span> for (IoSession s : sessions) {<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> OgnlContext context = (OgnlContext) Ognl.createDefaultContext(s);<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> context.setTypeConverter(typeConverter);<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> context.put(AbstractPropertyAccessor.READ_ONLY_MODE, true);<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> context.put(AbstractPropertyAccessor.QUERY, query);<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> Object result = Ognl.getValue(expression, context, s);<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> <a name="line.90"></a> |
| <span class="sourceLineNo">091</span> if (result instanceof Boolean) {<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> if (((Boolean) result).booleanValue()) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> answer.add(s);<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> }<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> } else {<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> throw new OgnlException("Query didn't return a boolean value: " + query);<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> }<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> }<a name="line.98"></a> |
| <span class="sourceLineNo">099</span><a name="line.99"></a> |
| <span class="sourceLineNo">100</span> return answer;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> }<a name="line.101"></a> |
| <span class="sourceLineNo">102</span>}<a name="line.102"></a> |
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