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apache / chemistry-site / 19af7d0fa4e1872c926a0e153c3f24d6bc996bae / . / content / java / 1.1.0 / maven / chemistry-opencmis-android / chemistry-opencmis-android-client / xref / org / apache / chemistry / opencmis / commons / impl / ClassLoaderUtil.html
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<div id="overview"><a href="../../../../../../../apidocs/org/apache/chemistry/opencmis/commons/impl/ClassLoaderUtil.html">View Javadoc</a></div><pre>
<a class="jxr_linenumber" name="1" href="#1">1</a> <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em>
<a class="jxr_linenumber" name="3" href="#3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em>
<a class="jxr_linenumber" name="4" href="#4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em>
<a class="jxr_linenumber" name="5" href="#5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em>
<a class="jxr_linenumber" name="6" href="#6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em>
<a class="jxr_linenumber" name="7" href="#7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="8" href="#8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="9" href="#9">9</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="11" href="#11">11</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="12" href="#12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em>
<a class="jxr_linenumber" name="13" href="#13">13</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em>
<a class="jxr_linenumber" name="14" href="#14">14</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
<a class="jxr_linenumber" name="15" href="#15">15</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em>
<a class="jxr_linenumber" name="16" href="#16">16</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="17" href="#17">17</a> <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="18" href="#18">18</a> <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="19" href="#19">19</a> <strong class="jxr_keyword">package</strong> org.apache.chemistry.opencmis.commons.impl;
<a class="jxr_linenumber" name="20" href="#20">20</a>
<a class="jxr_linenumber" name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> java.util.HashMap;
<a class="jxr_linenumber" name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> java.util.List;
<a class="jxr_linenumber" name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> java.util.Map;
<a class="jxr_linenumber" name="24" href="#24">24</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.locks.ReentrantReadWriteLock;
<a class="jxr_linenumber" name="25" href="#25">25</a>
<a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/chemistry/opencmis/commons/impl/ClassLoaderUtil.html">ClassLoaderUtil</a> {
<a class="jxr_linenumber" name="27" href="#27">27</a>
<a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> ReentrantReadWriteLock LOCK = <strong class="jxr_keyword">new</strong> ReentrantReadWriteLock();
<a class="jxr_linenumber" name="29" href="#29">29</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> Map&lt;Long, Map&lt;String, ClassLoader&gt;&gt; CLASSLOADER_MAP = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="30" href="#30">30</a>
<a class="jxr_linenumber" name="31" href="#31">31</a> <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/chemistry/opencmis/commons/impl/ClassLoaderUtil.html">ClassLoaderUtil</a>() {
<a class="jxr_linenumber" name="32" href="#32">32</a> }
<a class="jxr_linenumber" name="33" href="#33">33</a>
<a class="jxr_linenumber" name="34" href="#34">34</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="35" href="#35">35</a> <em class="jxr_javadoccomment"> * Registers a bundle classloader.</em>
<a class="jxr_linenumber" name="36" href="#36">36</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="37" href="#37">37</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> registerBundleClassLoader(<strong class="jxr_keyword">long</strong> bundleId, ClassLoader classLoader, List&lt;String&gt; classes) {
<a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">if</strong> (classLoader == <strong class="jxr_keyword">null</strong> || classes == <strong class="jxr_keyword">null</strong> || classes.isEmpty()) {
<a class="jxr_linenumber" name="39" href="#39">39</a> <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="40" href="#40">40</a> }
<a class="jxr_linenumber" name="41" href="#41">41</a>
<a class="jxr_linenumber" name="42" href="#42">42</a> Map&lt;String, ClassLoader&gt; bundleMap = <strong class="jxr_keyword">new</strong> HashMap&lt;String, ClassLoader&gt;();
<a class="jxr_linenumber" name="43" href="#43">43</a>
<a class="jxr_linenumber" name="44" href="#44">44</a> <strong class="jxr_keyword">for</strong> (String clazz : classes) {
<a class="jxr_linenumber" name="45" href="#45">45</a> <strong class="jxr_keyword">if</strong> (clazz != <strong class="jxr_keyword">null</strong> &amp;&amp; !clazz.isEmpty()) {
<a class="jxr_linenumber" name="46" href="#46">46</a> bundleMap.put(clazz, classLoader);
<a class="jxr_linenumber" name="47" href="#47">47</a> }
<a class="jxr_linenumber" name="48" href="#48">48</a> }
<a class="jxr_linenumber" name="49" href="#49">49</a>
<a class="jxr_linenumber" name="50" href="#50">50</a> <strong class="jxr_keyword">if</strong> (bundleMap.isEmpty()) {
<a class="jxr_linenumber" name="51" href="#51">51</a> <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="52" href="#52">52</a> }
<a class="jxr_linenumber" name="53" href="#53">53</a>
<a class="jxr_linenumber" name="54" href="#54">54</a> LOCK.writeLock().lock();
<a class="jxr_linenumber" name="55" href="#55">55</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="56" href="#56">56</a> <strong class="jxr_keyword">if</strong> (CLASSLOADER_MAP == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="57" href="#57">57</a> CLASSLOADER_MAP = <strong class="jxr_keyword">new</strong> HashMap&lt;Long, Map&lt;String, ClassLoader&gt;&gt;();
<a class="jxr_linenumber" name="58" href="#58">58</a> }
<a class="jxr_linenumber" name="59" href="#59">59</a>
<a class="jxr_linenumber" name="60" href="#60">60</a> CLASSLOADER_MAP.put(bundleId, bundleMap);
<a class="jxr_linenumber" name="61" href="#61">61</a> } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="62" href="#62">62</a> LOCK.writeLock().unlock();
<a class="jxr_linenumber" name="63" href="#63">63</a> }
<a class="jxr_linenumber" name="64" href="#64">64</a> }
<a class="jxr_linenumber" name="65" href="#65">65</a>
<a class="jxr_linenumber" name="66" href="#66">66</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="67" href="#67">67</a> <em class="jxr_javadoccomment"> * Unregisters a bundle classloader.</em>
<a class="jxr_linenumber" name="68" href="#68">68</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="69" href="#69">69</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> unregisterBundleClassLoader(<strong class="jxr_keyword">long</strong> bundleId) {
<a class="jxr_linenumber" name="70" href="#70">70</a> LOCK.writeLock().lock();
<a class="jxr_linenumber" name="71" href="#71">71</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="72" href="#72">72</a> <strong class="jxr_keyword">if</strong> (CLASSLOADER_MAP != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="73" href="#73">73</a> CLASSLOADER_MAP.remove(bundleId);
<a class="jxr_linenumber" name="74" href="#74">74</a> }
<a class="jxr_linenumber" name="75" href="#75">75</a> } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="76" href="#76">76</a> LOCK.writeLock().unlock();
<a class="jxr_linenumber" name="77" href="#77">77</a> }
<a class="jxr_linenumber" name="78" href="#78">78</a> }
<a class="jxr_linenumber" name="79" href="#79">79</a>
<a class="jxr_linenumber" name="80" href="#80">80</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="81" href="#81">81</a> <em class="jxr_javadoccomment"> * Unregisters all bundle classloaders.</em>
<a class="jxr_linenumber" name="82" href="#82">82</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="83" href="#83">83</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> unregisterAllBundleClassLoaders() {
<a class="jxr_linenumber" name="84" href="#84">84</a> LOCK.writeLock().lock();
<a class="jxr_linenumber" name="85" href="#85">85</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="86" href="#86">86</a> CLASSLOADER_MAP = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="87" href="#87">87</a> } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="88" href="#88">88</a> LOCK.writeLock().unlock();
<a class="jxr_linenumber" name="89" href="#89">89</a> }
<a class="jxr_linenumber" name="90" href="#90">90</a> }
<a class="jxr_linenumber" name="91" href="#91">91</a>
<a class="jxr_linenumber" name="92" href="#92">92</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="93" href="#93">93</a> <em class="jxr_javadoccomment"> * Loads a class. If the context class loader is set, it is used.</em>
<a class="jxr_linenumber" name="94" href="#94">94</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="95" href="#95">95</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> Class&lt;?&gt; loadClass(String className) <strong class="jxr_keyword">throws</strong> ClassNotFoundException {
<a class="jxr_linenumber" name="96" href="#96">96</a> ClassLoader ccl = Thread.currentThread().getContextClassLoader();
<a class="jxr_linenumber" name="97" href="#97">97</a> <strong class="jxr_keyword">if</strong> (ccl == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="98" href="#98">98</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="99" href="#99">99</a> <strong class="jxr_keyword">return</strong> loadClass(className, <strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="100" href="#100">100</a> } <strong class="jxr_keyword">catch</strong> (ClassNotFoundException cnf) {
<a class="jxr_linenumber" name="101" href="#101">101</a> <strong class="jxr_keyword">return</strong> loadClassWithRegisteredClassLoaders(className);
<a class="jxr_linenumber" name="102" href="#102">102</a> }
<a class="jxr_linenumber" name="103" href="#103">103</a> }
<a class="jxr_linenumber" name="104" href="#104">104</a>
<a class="jxr_linenumber" name="105" href="#105">105</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="106" href="#106">106</a> <strong class="jxr_keyword">return</strong> loadClass(className, ccl);
<a class="jxr_linenumber" name="107" href="#107">107</a> } <strong class="jxr_keyword">catch</strong> (ClassNotFoundException cnf) {
<a class="jxr_linenumber" name="108" href="#108">108</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="109" href="#109">109</a> <strong class="jxr_keyword">return</strong> loadClass(className, <strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="110" href="#110">110</a> } <strong class="jxr_keyword">catch</strong> (ClassNotFoundException cnf2) {
<a class="jxr_linenumber" name="111" href="#111">111</a> <strong class="jxr_keyword">return</strong> loadClassWithRegisteredClassLoaders(className);
<a class="jxr_linenumber" name="112" href="#112">112</a> }
<a class="jxr_linenumber" name="113" href="#113">113</a> }
<a class="jxr_linenumber" name="114" href="#114">114</a> }
<a class="jxr_linenumber" name="115" href="#115">115</a>
<a class="jxr_linenumber" name="116" href="#116">116</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="117" href="#117">117</a> <em class="jxr_javadoccomment"> * Loads a class with the reigistered class loaders.</em>
<a class="jxr_linenumber" name="118" href="#118">118</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="119" href="#119">119</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> Class&lt;?&gt; loadClassWithRegisteredClassLoaders(String className) <strong class="jxr_keyword">throws</strong> ClassNotFoundException {
<a class="jxr_linenumber" name="120" href="#120">120</a> <strong class="jxr_keyword">if</strong> (className == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="121" href="#121">121</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> ClassNotFoundException(<span class="jxr_string">"Class name is null!"</span>);
<a class="jxr_linenumber" name="122" href="#122">122</a> }
<a class="jxr_linenumber" name="123" href="#123">123</a>
<a class="jxr_linenumber" name="124" href="#124">124</a> LOCK.readLock().lock();
<a class="jxr_linenumber" name="125" href="#125">125</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="126" href="#126">126</a> <strong class="jxr_keyword">if</strong> (CLASSLOADER_MAP == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="127" href="#127">127</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> ClassNotFoundException();
<a class="jxr_linenumber" name="128" href="#128">128</a> }
<a class="jxr_linenumber" name="129" href="#129">129</a>
<a class="jxr_linenumber" name="130" href="#130">130</a> <strong class="jxr_keyword">for</strong> (Map&lt;String, ClassLoader&gt; clm : CLASSLOADER_MAP.values()) {
<a class="jxr_linenumber" name="131" href="#131">131</a> <strong class="jxr_keyword">for</strong> (Map.Entry&lt;String, ClassLoader&gt; cle : clm.entrySet()) {
<a class="jxr_linenumber" name="132" href="#132">132</a> <strong class="jxr_keyword">if</strong> (cle.getKey().equals(className)) {
<a class="jxr_linenumber" name="133" href="#133">133</a> <strong class="jxr_keyword">return</strong> loadClass(className, cle.getValue());
<a class="jxr_linenumber" name="134" href="#134">134</a> }
<a class="jxr_linenumber" name="135" href="#135">135</a> }
<a class="jxr_linenumber" name="136" href="#136">136</a> }
<a class="jxr_linenumber" name="137" href="#137">137</a>
<a class="jxr_linenumber" name="138" href="#138">138</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> ClassNotFoundException();
<a class="jxr_linenumber" name="139" href="#139">139</a> } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="140" href="#140">140</a> LOCK.readLock().unlock();
<a class="jxr_linenumber" name="141" href="#141">141</a> }
<a class="jxr_linenumber" name="142" href="#142">142</a> }
<a class="jxr_linenumber" name="143" href="#143">143</a>
<a class="jxr_linenumber" name="144" href="#144">144</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="145" href="#145">145</a> <em class="jxr_javadoccomment"> * Loads a class from the given class loader.</em>
<a class="jxr_linenumber" name="146" href="#146">146</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="147" href="#147">147</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> Class&lt;?&gt; loadClass(String className, ClassLoader classLoader) <strong class="jxr_keyword">throws</strong> ClassNotFoundException {
<a class="jxr_linenumber" name="148" href="#148">148</a> <strong class="jxr_keyword">if</strong> (classLoader == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="149" href="#149">149</a> <strong class="jxr_keyword">return</strong> Class.forName(className);
<a class="jxr_linenumber" name="150" href="#150">150</a> } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="151" href="#151">151</a> <strong class="jxr_keyword">return</strong> Class.forName(className, <strong class="jxr_keyword">true</strong>, classLoader);
<a class="jxr_linenumber" name="152" href="#152">152</a> }
<a class="jxr_linenumber" name="153" href="#153">153</a> }
<a class="jxr_linenumber" name="154" href="#154">154</a> }
</pre>
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