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apache / felix-site-pub / ce5028da261c6ed2e1928e6338c81e1f24559823 / . / ipojo / api / 1.12.1 / src-html / org / apache / felix / ipojo / dependency / impl / TransformedServiceReferenceImpl.html
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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><a name="line.19"></a>
<span class="sourceLineNo">020</span>package org.apache.felix.ipojo.dependency.impl;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.apache.felix.ipojo.dependency.interceptors.TransformedServiceReference;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.osgi.framework.Bundle;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.osgi.framework.Constants;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.osgi.framework.ServiceReference;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.*;<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> * Implements transformed service reference.<a name="line.30"></a>
<span class="sourceLineNo">031</span> */<a name="line.31"></a>
<span class="sourceLineNo">032</span>public class TransformedServiceReferenceImpl&lt;S&gt; implements TransformedServiceReference&lt;S&gt; {<a name="line.32"></a>
<span class="sourceLineNo">033</span><a name="line.33"></a>
<span class="sourceLineNo">034</span> private final ServiceReference&lt;S&gt; m_origin;<a name="line.34"></a>
<span class="sourceLineNo">035</span> private Map&lt;String, Object&gt; m_properties = new HashMap&lt;String, Object&gt;();<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span> public TransformedServiceReferenceImpl(ServiceReference&lt;S&gt; origin) {<a name="line.37"></a>
<span class="sourceLineNo">038</span> this.m_origin = origin;<a name="line.38"></a>
<span class="sourceLineNo">039</span> // Copy properties<a name="line.39"></a>
<span class="sourceLineNo">040</span> for (String key : origin.getPropertyKeys()) {<a name="line.40"></a>
<span class="sourceLineNo">041</span> m_properties.put(key, origin.getProperty(key));<a name="line.41"></a>
<span class="sourceLineNo">042</span> }<a name="line.42"></a>
<span class="sourceLineNo">043</span> }<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span> public TransformedServiceReferenceImpl&lt;S&gt; addProperty(String name, Object value) {<a name="line.45"></a>
<span class="sourceLineNo">046</span> if (FORBIDDEN_KEYS.contains(name)) {<a name="line.46"></a>
<span class="sourceLineNo">047</span> throw new IllegalArgumentException("Cannot change the property " + name);<a name="line.47"></a>
<span class="sourceLineNo">048</span> }<a name="line.48"></a>
<span class="sourceLineNo">049</span> m_properties.put(name, value);<a name="line.49"></a>
<span class="sourceLineNo">050</span> return this;<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> public TransformedServiceReference&lt;S&gt; addPropertyIfAbsent(String name, Object value) {<a name="line.53"></a>
<span class="sourceLineNo">054</span> if (! contains(name)) {<a name="line.54"></a>
<span class="sourceLineNo">055</span> addProperty(name, value);<a name="line.55"></a>
<span class="sourceLineNo">056</span> }<a name="line.56"></a>
<span class="sourceLineNo">057</span> return this;<a name="line.57"></a>
<span class="sourceLineNo">058</span> }<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span> public Object get(String name) {<a name="line.60"></a>
<span class="sourceLineNo">061</span> return m_properties.get(name);<a name="line.61"></a>
<span class="sourceLineNo">062</span> }<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span> public TransformedServiceReferenceImpl&lt;S&gt; removeProperty(String name) {<a name="line.64"></a>
<span class="sourceLineNo">065</span> if (FORBIDDEN_KEYS.contains(name)) {<a name="line.65"></a>
<span class="sourceLineNo">066</span> throw new IllegalArgumentException("Cannot change the property " + name);<a name="line.66"></a>
<span class="sourceLineNo">067</span> }<a name="line.67"></a>
<span class="sourceLineNo">068</span> // Store a null value.<a name="line.68"></a>
<span class="sourceLineNo">069</span> m_properties.put(name, null);<a name="line.69"></a>
<span class="sourceLineNo">070</span> return this;<a name="line.70"></a>
<span class="sourceLineNo">071</span> }<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span> public boolean contains(String name) {<a name="line.73"></a>
<span class="sourceLineNo">074</span> return m_properties.get(name) != null;<a name="line.74"></a>
<span class="sourceLineNo">075</span> }<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span> public ServiceReference&lt;S&gt; getWrappedReference() {<a name="line.77"></a>
<span class="sourceLineNo">078</span> if (m_origin instanceof TransformedServiceReferenceImpl) {<a name="line.78"></a>
<span class="sourceLineNo">079</span> return ((TransformedServiceReferenceImpl&lt;S&gt;) m_origin).getWrappedReference();<a name="line.79"></a>
<span class="sourceLineNo">080</span> } else {<a name="line.80"></a>
<span class="sourceLineNo">081</span> return m_origin;<a name="line.81"></a>
<span class="sourceLineNo">082</span> }<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> public Object getProperty(String key) {<a name="line.85"></a>
<span class="sourceLineNo">086</span> return m_properties.get(key);<a name="line.86"></a>
<span class="sourceLineNo">087</span> }<a name="line.87"></a>
<span class="sourceLineNo">088</span><a name="line.88"></a>
<span class="sourceLineNo">089</span> public String[] getPropertyKeys() {<a name="line.89"></a>
<span class="sourceLineNo">090</span> List&lt;String&gt; keys = new ArrayList&lt;String&gt;();<a name="line.90"></a>
<span class="sourceLineNo">091</span> for (Map.Entry&lt;String, Object&gt; entry : m_properties.entrySet()) {<a name="line.91"></a>
<span class="sourceLineNo">092</span> if (entry.getValue() != null) {<a name="line.92"></a>
<span class="sourceLineNo">093</span> keys.add(entry.getKey());<a name="line.93"></a>
<span class="sourceLineNo">094</span> }<a name="line.94"></a>
<span class="sourceLineNo">095</span> }<a name="line.95"></a>
<span class="sourceLineNo">096</span> return keys.toArray(new String[keys.size()]);<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> public Bundle getBundle() {<a name="line.99"></a>
<span class="sourceLineNo">100</span> return m_origin.getBundle();<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>
<span class="sourceLineNo">103</span> public Bundle[] getUsingBundles() {<a name="line.103"></a>
<span class="sourceLineNo">104</span> return m_origin.getUsingBundles();<a name="line.104"></a>
<span class="sourceLineNo">105</span> }<a name="line.105"></a>
<span class="sourceLineNo">106</span><a name="line.106"></a>
<span class="sourceLineNo">107</span> public boolean isAssignableTo(Bundle bundle, String className) {<a name="line.107"></a>
<span class="sourceLineNo">108</span> return m_origin.isAssignableTo(bundle, className);<a name="line.108"></a>
<span class="sourceLineNo">109</span> }<a name="line.109"></a>
<span class="sourceLineNo">110</span><a name="line.110"></a>
<span class="sourceLineNo">111</span> /**<a name="line.111"></a>
<span class="sourceLineNo">112</span> * Compares two service references.<a name="line.112"></a>
<span class="sourceLineNo">113</span> * This method is not delegated as we may have modified some of the properties using for the ranking.<a name="line.113"></a>
<span class="sourceLineNo">114</span> * @param reference the reference<a name="line.114"></a>
<span class="sourceLineNo">115</span> * @return 0, 1 or -1 depending of the reference.<a name="line.115"></a>
<span class="sourceLineNo">116</span> */<a name="line.116"></a>
<span class="sourceLineNo">117</span> public int compareTo(Object reference) {<a name="line.117"></a>
<span class="sourceLineNo">118</span> ServiceReference other = (ServiceReference) reference;<a name="line.118"></a>
<span class="sourceLineNo">119</span><a name="line.119"></a>
<span class="sourceLineNo">120</span> Long id = (Long) getProperty(Constants.SERVICE_ID);<a name="line.120"></a>
<span class="sourceLineNo">121</span> Long otherId = (Long) other.getProperty(Constants.SERVICE_ID);<a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
<span class="sourceLineNo">123</span> if (id.equals(otherId)) {<a name="line.123"></a>
<span class="sourceLineNo">124</span> return 0; // same service<a name="line.124"></a>
<span class="sourceLineNo">125</span> }<a name="line.125"></a>
<span class="sourceLineNo">126</span><a name="line.126"></a>
<span class="sourceLineNo">127</span> Object rankObj = getProperty(Constants.SERVICE_RANKING);<a name="line.127"></a>
<span class="sourceLineNo">128</span> Object otherRankObj = other.getProperty(Constants.SERVICE_RANKING);<a name="line.128"></a>
<span class="sourceLineNo">129</span><a name="line.129"></a>
<span class="sourceLineNo">130</span> // If no rank, then spec says it defaults to zero.<a name="line.130"></a>
<span class="sourceLineNo">131</span> rankObj = (rankObj == null) ? new Integer(0) : rankObj;<a name="line.131"></a>
<span class="sourceLineNo">132</span> otherRankObj = (otherRankObj == null) ? new Integer(0) : otherRankObj;<a name="line.132"></a>
<span class="sourceLineNo">133</span><a name="line.133"></a>
<span class="sourceLineNo">134</span> // If rank is not Integer, then spec says it defaults to zero.<a name="line.134"></a>
<span class="sourceLineNo">135</span> Integer rank = (rankObj instanceof Integer)<a name="line.135"></a>
<span class="sourceLineNo">136</span> ? (Integer) rankObj : new Integer(0);<a name="line.136"></a>
<span class="sourceLineNo">137</span> Integer otherRank = (otherRankObj instanceof Integer)<a name="line.137"></a>
<span class="sourceLineNo">138</span> ? (Integer) otherRankObj : new Integer(0);<a name="line.138"></a>
<span class="sourceLineNo">139</span><a name="line.139"></a>
<span class="sourceLineNo">140</span> // Sort by rank in ascending order.<a name="line.140"></a>
<span class="sourceLineNo">141</span> if (rank.compareTo(otherRank) &lt; 0) {<a name="line.141"></a>
<span class="sourceLineNo">142</span> return -1; // lower rank<a name="line.142"></a>
<span class="sourceLineNo">143</span> } else if (rank.compareTo(otherRank) &gt; 0) {<a name="line.143"></a>
<span class="sourceLineNo">144</span> return 1; // higher rank<a name="line.144"></a>
<span class="sourceLineNo">145</span> }<a name="line.145"></a>
<span class="sourceLineNo">146</span><a name="line.146"></a>
<span class="sourceLineNo">147</span> // If ranks are equal, then sort by service id in descending order.<a name="line.147"></a>
<span class="sourceLineNo">148</span> return (id.compareTo(otherId) &lt; 0) ? 1 : -1;<a name="line.148"></a>
<span class="sourceLineNo">149</span> }<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span> @Override<a name="line.151"></a>
<span class="sourceLineNo">152</span> public boolean equals(Object o) {<a name="line.152"></a>
<span class="sourceLineNo">153</span> if (o instanceof ServiceReference) {<a name="line.153"></a>
<span class="sourceLineNo">154</span> Object id1 = ((ServiceReference) o).getProperty(Constants.SERVICE_ID);<a name="line.154"></a>
<span class="sourceLineNo">155</span> Object id2 = this.getProperty(Constants.SERVICE_ID);<a name="line.155"></a>
<span class="sourceLineNo">156</span> return (id1 != null &amp;&amp; id1.equals(id2)) || (id1 == id2);<a name="line.156"></a>
<span class="sourceLineNo">157</span> }<a name="line.157"></a>
<span class="sourceLineNo">158</span> return m_origin.equals(o);<a name="line.158"></a>
<span class="sourceLineNo">159</span> }<a name="line.159"></a>
<span class="sourceLineNo">160</span><a name="line.160"></a>
<span class="sourceLineNo">161</span> @Override<a name="line.161"></a>
<span class="sourceLineNo">162</span> public int hashCode() {<a name="line.162"></a>
<span class="sourceLineNo">163</span> return m_origin.hashCode();<a name="line.163"></a>
<span class="sourceLineNo">164</span> }<a name="line.164"></a>
<span class="sourceLineNo">165</span><a name="line.165"></a>
<span class="sourceLineNo">166</span> @Override<a name="line.166"></a>
<span class="sourceLineNo">167</span> public String toString() {<a name="line.167"></a>
<span class="sourceLineNo">168</span> return getWrappedReference().toString() + m_properties;<a name="line.168"></a>
<span class="sourceLineNo">169</span> }<a name="line.169"></a>
<span class="sourceLineNo">170</span>}<a name="line.170"></a>
</pre>
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