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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<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> *<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> *<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing,<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * software distributed under the License is distributed on an<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * KIND, either express or implied. See the License for the<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * specific language governing permissions and limitations<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * under the License.<a name="line.17"></a> |
| <span class="sourceLineNo">018</span> */<a name="line.18"></a> |
| <span class="sourceLineNo">019</span>package org.apache.shiro.util;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.io.Serializable;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import java.util.*;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span><a name="line.23"></a> |
| <span class="sourceLineNo">024</span>/**<a name="line.24"></a> |
| <span class="sourceLineNo">025</span> * A {@code MapContext} provides a common base for context-based data storage in a {@link Map}. Type-safe attribute<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> * retrieval is provided for subclasses with the {@link #getTypedValue(String, Class)} method.<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> *<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> * @see org.apache.shiro.subject.SubjectContext SubjectContext<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> * @see org.apache.shiro.session.mgt.SessionContext SessionContext<a name="line.29"></a> |
| <span class="sourceLineNo">030</span> * @since 1.0<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> */<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>public class MapContext implements Map<String, Object>, Serializable {<a name="line.32"></a> |
| <span class="sourceLineNo">033</span><a name="line.33"></a> |
| <span class="sourceLineNo">034</span> private static final long serialVersionUID = 5373399119017820322L;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span><a name="line.35"></a> |
| <span class="sourceLineNo">036</span> private final Map<String, Object> backingMap;<a name="line.36"></a> |
| <span class="sourceLineNo">037</span><a name="line.37"></a> |
| <span class="sourceLineNo">038</span> public MapContext() {<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> this.backingMap = new HashMap<String, Object>();<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> }<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> public MapContext(Map<String, Object> map) {<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> this();<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> if (!CollectionUtils.isEmpty(map)) {<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> this.backingMap.putAll(map);<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> }<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> }<a name="line.47"></a> |
| <span class="sourceLineNo">048</span><a name="line.48"></a> |
| <span class="sourceLineNo">049</span> /**<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> * Performs a {@link #get get} operation but additionally ensures that the value returned is of the specified<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * {@code type}. If there is no value, {@code null} is returned.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> *<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> * @param key the attribute key to look up a value<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> * @param type the expected type of the value<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> * @param <E> the expected type of the value<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> * @return the typed value or {@code null} if the attribute does not exist.<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> */<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> @SuppressWarnings({"unchecked"})<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> protected <E> E getTypedValue(String key, Class<E> type) {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> E found = null;<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> Object o = backingMap.get(key);<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> if (o != null) {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> if (!type.isAssignableFrom(o.getClass())) {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> String msg = "Invalid object found in SubjectContext Map under key [" + key + "]. Expected type " +<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> "was [" + type.getName() + "], but the object under that key is of type " +<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> "[" + o.getClass().getName() + "].";<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> throw new IllegalArgumentException(msg);<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> }<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> found = (E) o;<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> }<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> return found;<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> }<a name="line.72"></a> |
| <span class="sourceLineNo">073</span><a name="line.73"></a> |
| <span class="sourceLineNo">074</span> /**<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> * Places a value in this context map under the given key only if the given {@code value} argument is not null.<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> *<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> * @param key the attribute key under which the non-null value will be stored<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> * @param value the non-null value to store. If {@code null}, this method does nothing and returns immediately.<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> */<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> protected void nullSafePut(String key, Object value) {<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> if (value != null) {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> put(key, value);<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> }<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> }<a name="line.84"></a> |
| <span class="sourceLineNo">085</span><a name="line.85"></a> |
| <span class="sourceLineNo">086</span> public int size() {<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> return backingMap.size();<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> }<a name="line.88"></a> |
| <span class="sourceLineNo">089</span><a name="line.89"></a> |
| <span class="sourceLineNo">090</span> public boolean isEmpty() {<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> return backingMap.isEmpty();<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> }<a name="line.92"></a> |
| <span class="sourceLineNo">093</span><a name="line.93"></a> |
| <span class="sourceLineNo">094</span> public boolean containsKey(Object o) {<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> return backingMap.containsKey(o);<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> }<a name="line.96"></a> |
| <span class="sourceLineNo">097</span><a name="line.97"></a> |
| <span class="sourceLineNo">098</span> public boolean containsValue(Object o) {<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> return backingMap.containsValue(o);<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> }<a name="line.100"></a> |
| <span class="sourceLineNo">101</span><a name="line.101"></a> |
| <span class="sourceLineNo">102</span> public Object get(Object o) {<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> return backingMap.get(o);<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> }<a name="line.104"></a> |
| <span class="sourceLineNo">105</span><a name="line.105"></a> |
| <span class="sourceLineNo">106</span> public Object put(String s, Object o) {<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> return backingMap.put(s, o);<a name="line.107"></a> |
| <span class="sourceLineNo">108</span> }<a name="line.108"></a> |
| <span class="sourceLineNo">109</span><a name="line.109"></a> |
| <span class="sourceLineNo">110</span> public Object remove(Object o) {<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> return backingMap.remove(o);<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> }<a name="line.112"></a> |
| <span class="sourceLineNo">113</span><a name="line.113"></a> |
| <span class="sourceLineNo">114</span> public void putAll(Map<? extends String, ?> map) {<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> backingMap.putAll(map);<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> }<a name="line.116"></a> |
| <span class="sourceLineNo">117</span><a name="line.117"></a> |
| <span class="sourceLineNo">118</span> public void clear() {<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> backingMap.clear();<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> }<a name="line.120"></a> |
| <span class="sourceLineNo">121</span><a name="line.121"></a> |
| <span class="sourceLineNo">122</span> public Set<String> keySet() {<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> return Collections.unmodifiableSet(backingMap.keySet());<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> }<a name="line.124"></a> |
| <span class="sourceLineNo">125</span><a name="line.125"></a> |
| <span class="sourceLineNo">126</span> public Collection<Object> values() {<a name="line.126"></a> |
| <span class="sourceLineNo">127</span> return Collections.unmodifiableCollection(backingMap.values());<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> }<a name="line.128"></a> |
| <span class="sourceLineNo">129</span><a name="line.129"></a> |
| <span class="sourceLineNo">130</span> public Set<Entry<String, Object>> entrySet() {<a name="line.130"></a> |
| <span class="sourceLineNo">131</span> return Collections.unmodifiableSet(backingMap.entrySet());<a name="line.131"></a> |
| <span class="sourceLineNo">132</span> }<a name="line.132"></a> |
| <span class="sourceLineNo">133</span>}<a name="line.133"></a> |
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| </pre> |
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