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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<title>ProviderLocator</title>
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<div class="header">
<div class="subTitle">org.apache.geronimo.osgi.locator</div>
<h2 title="Class ProviderLocator" class="title">Class ProviderLocator</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>org.apache.geronimo.osgi.locator.ProviderLocator</li>
</ul>
</li>
</ul>
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<pre>public class <span class="strong">ProviderLocator</span>
extends java.lang.Object</pre>
</li>
</ul>
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<!-- ========== METHOD SUMMARY =========== -->
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<h3>Method Summary</h3>
<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#destroy()">destroy</a></strong>()</code>
<div class="block">Cleanup resources on bundle shutdown.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#getService(java.lang.String,%20java.lang.Class,%20java.lang.ClassLoader)">getService</a></strong>(java.lang.String&nbsp;iface,
          java.lang.Class&lt;?&gt;&nbsp;contextClass,
          java.lang.ClassLoader&nbsp;loader)</code>
<div class="block">Get a single service instance that matches an interface
 definition.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static java.lang.Class&lt;?&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#getServiceClass(java.lang.String,%20java.lang.Class,%20java.lang.ClassLoader)">getServiceClass</a></strong>(java.lang.String&nbsp;iface,
               java.lang.Class&lt;?&gt;&nbsp;contextClass,
               java.lang.ClassLoader&nbsp;loader)</code>
<div class="block">Locate a service class that matches an interface
 definition.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static java.util.List&lt;java.lang.Class&lt;?&gt;&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#getServiceClasses(java.lang.String,%20java.lang.Class,%20java.lang.ClassLoader)">getServiceClasses</a></strong>(java.lang.String&nbsp;iface,
                 java.lang.Class&lt;?&gt;&nbsp;contextClass,
                 java.lang.ClassLoader&nbsp;loader)</code>
<div class="block">Get a list of service class implementations that match
 an interface name.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static java.util.List&lt;java.lang.Object&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#getServices(java.lang.String,%20java.lang.Class,%20java.lang.ClassLoader)">getServices</a></strong>(java.lang.String&nbsp;iface,
           java.lang.Class&lt;?&gt;&nbsp;contextClass,
           java.lang.ClassLoader&nbsp;loader)</code>
<div class="block">Get a list of services that match a given interface
 name.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#init(org.osgi.framework.BundleContext)">init</a></strong>(org.osgi.framework.BundleContext&nbsp;c)</code>
<div class="block">initialize the tracker statics for this bundle</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static java.lang.Class&lt;?&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#loadClass(java.lang.String)">loadClass</a></strong>(java.lang.String&nbsp;className)</code>
<div class="block">Utility class for locating a class with OSGi registry
 support.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static java.lang.Class&lt;?&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#loadClass(java.lang.String,%20java.lang.Class)">loadClass</a></strong>(java.lang.String&nbsp;className,
         java.lang.Class&lt;?&gt;&nbsp;contextClass)</code>
<div class="block">Utility class for locating a class with OSGi registry
 support.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static java.lang.Class&lt;?&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#loadClass(java.lang.String,%20java.lang.Class,%20java.lang.ClassLoader)">loadClass</a></strong>(java.lang.String&nbsp;className,
         java.lang.Class&lt;?&gt;&nbsp;contextClass,
         java.lang.ClassLoader&nbsp;loader)</code>
<div class="block">Standardized utility method for performing class lookups
 with support for OSGi registry lookups.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static java.lang.Class&lt;?&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#locate(java.lang.String)">locate</a></strong>(java.lang.String&nbsp;providerId)</code>
<div class="block">Locate a class by its provider id indicator.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static java.util.List&lt;java.lang.Class&lt;?&gt;&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#locateAll(java.lang.String)">locateAll</a></strong>(java.lang.String&nbsp;providerId)</code>
<div class="block">Locate all class files that match a given factory id.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/geronimo/osgi/locator/ProviderLocator.html#lookupByJREPropertyFile(java.lang.String,%20java.lang.String)">lookupByJREPropertyFile</a></strong>(java.lang.String&nbsp;path,
                       java.lang.String&nbsp;property)</code>
<div class="block">Perform a service class discovery by looking for a
 property in a target properties file located in the
 java.home directory.</div>
</td>
</tr>
</table>
<ul class="blockList">
<li class="blockList"><a name="methods_inherited_from_class_java.lang.Object">
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
</ul>
</li>
</ul>
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<!-- ============ METHOD DETAIL ========== -->
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<h3>Method Detail</h3>
<a name="init(org.osgi.framework.BundleContext)">
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<ul class="blockList">
<li class="blockList">
<h4>init</h4>
<pre>public static&nbsp;void&nbsp;init(org.osgi.framework.BundleContext&nbsp;c)</pre>
<div class="block">initialize the tracker statics for this bundle</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>c</code> - The starup BundleContext.</dd></dl>
</li>
</ul>
<a name="destroy()">
<!--   -->
</a>
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<h4>destroy</h4>
<pre>public static&nbsp;void&nbsp;destroy()</pre>
<div class="block">Cleanup resources on bundle shutdown.</div>
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<a name="locate(java.lang.String)">
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<ul class="blockList">
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<h4>locate</h4>
<pre>public static&nbsp;java.lang.Class&lt;?&gt;&nbsp;locate(java.lang.String&nbsp;providerId)</pre>
<div class="block">Locate a class by its provider id indicator. .</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>providerId</code> - The provider id (generally, a fully qualified class name).</dd>
<dt><span class="strong">Returns:</span></dt><dd>The Class corresponding to this provider id.  Returns null
         if this is not registered or the indicated class can't be
         loaded.</dd></dl>
</li>
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<a name="locateAll(java.lang.String)">
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<h4>locateAll</h4>
<pre>public static&nbsp;java.util.List&lt;java.lang.Class&lt;?&gt;&gt;&nbsp;locateAll(java.lang.String&nbsp;providerId)</pre>
<div class="block">Locate all class files that match a given factory id.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>providerId</code> - The target provider identifier.</dd>
<dt><span class="strong">Returns:</span></dt><dd>A List containing the class objects corresponding to the
         provider identifier.  Returns an empty list if no
         matching classes can be located.</dd></dl>
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<ul class="blockList">
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<h4>loadClass</h4>
<pre>public static&nbsp;java.lang.Class&lt;?&gt;&nbsp;loadClass(java.lang.String&nbsp;className)
                                    throws java.lang.ClassNotFoundException</pre>
<div class="block">Utility class for locating a class with OSGi registry
 support.  Uses the thread context classloader as part of
 the search order.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>className</code> - The name of the target class.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The loaded class.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.ClassNotFoundException</code> - Thrown if the class cannot be located.</dd></dl>
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<h4>loadClass</h4>
<pre>public static&nbsp;java.lang.Class&lt;?&gt;&nbsp;loadClass(java.lang.String&nbsp;className,
                           java.lang.Class&lt;?&gt;&nbsp;contextClass)
                                    throws java.lang.ClassNotFoundException</pre>
<div class="block">Utility class for locating a class with OSGi registry
 support.  Uses the thread context classloader as part of
 the search order.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>className</code> - The name of the target class.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The loaded class.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.ClassNotFoundException</code> - Thrown if the class cannot be located.</dd></dl>
</li>
</ul>
<a name="loadClass(java.lang.String, java.lang.Class, java.lang.ClassLoader)">
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<h4>loadClass</h4>
<pre>public static&nbsp;java.lang.Class&lt;?&gt;&nbsp;loadClass(java.lang.String&nbsp;className,
                           java.lang.Class&lt;?&gt;&nbsp;contextClass,
                           java.lang.ClassLoader&nbsp;loader)
                                    throws java.lang.ClassNotFoundException</pre>
<div class="block">Standardized utility method for performing class lookups
 with support for OSGi registry lookups.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>className</code> - The name of the target class.</dd><dd><code>loader</code> - An optional class loader.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The loaded class</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.ClassNotFoundException</code> - Thrown if the class cannot be loaded.</dd></dl>
</li>
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<a name="getService(java.lang.String, java.lang.Class, java.lang.ClassLoader)">
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<h4>getService</h4>
<pre>public static&nbsp;java.lang.Object&nbsp;getService(java.lang.String&nbsp;iface,
                          java.lang.Class&lt;?&gt;&nbsp;contextClass,
                          java.lang.ClassLoader&nbsp;loader)
                                   throws java.lang.Exception</pre>
<div class="block">Get a single service instance that matches an interface
 definition.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>iface</code> - The name of the required interface.</dd><dd><code>contextClass</code> - The class requesting the lookup (used for class resolution).</dd><dd><code>loader</code> - A class loader to use for searching for service definitions
               and loading classes.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The service instance, or null if no matching services
         can be found.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.Exception</code> - Thrown for any classloading or exceptions thrown
                      trying to instantiate a service instance.</dd></dl>
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</ul>
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<h4>getServiceClass</h4>
<pre>public static&nbsp;java.lang.Class&lt;?&gt;&nbsp;getServiceClass(java.lang.String&nbsp;iface,
                                 java.lang.Class&lt;?&gt;&nbsp;contextClass,
                                 java.lang.ClassLoader&nbsp;loader)
                                          throws java.lang.ClassNotFoundException</pre>
<div class="block">Locate a service class that matches an interface
 definition.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>iface</code> - The name of the required interface.</dd><dd><code>contextClass</code> - The class requesting the lookup (used for class resolution).</dd><dd><code>loader</code> - A class loader to use for searching for service definitions
               and loading classes.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The located class, or null if no matching services
         can be found.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.Exception</code> - Thrown for any classloading exceptions thrown
                      trying to load the class.</dd>
<dd><code>java.lang.ClassNotFoundException</code></dd></dl>
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<h4>getServices</h4>
<pre>public static&nbsp;java.util.List&lt;java.lang.Object&gt;&nbsp;getServices(java.lang.String&nbsp;iface,
                                           java.lang.Class&lt;?&gt;&nbsp;contextClass,
                                           java.lang.ClassLoader&nbsp;loader)
                                                    throws java.lang.Exception</pre>
<div class="block">Get a list of services that match a given interface
 name.  This searches both the current class path and
 the global repository for matches.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>iface</code> - The name of the required interface.</dd><dd><code>contextClass</code> - The class requesting the lookup (used for class resolution).</dd><dd><code>loader</code> - A class loader to use for searching for service definitions
               and loading classes.</dd>
<dt><span class="strong">Returns:</span></dt><dd>A list of matching services.  Returns an empty list if there
         are no matches.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.Exception</code> - Thrown for any classloading or exceptions thrown
                      trying to instantiate a service instance.</dd></dl>
</li>
</ul>
<a name="getServiceClasses(java.lang.String, java.lang.Class, java.lang.ClassLoader)">
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<h4>getServiceClasses</h4>
<pre>public static&nbsp;java.util.List&lt;java.lang.Class&lt;?&gt;&gt;&nbsp;getServiceClasses(java.lang.String&nbsp;iface,
                                                   java.lang.Class&lt;?&gt;&nbsp;contextClass,
                                                   java.lang.ClassLoader&nbsp;loader)
                                                            throws java.lang.Exception</pre>
<div class="block">Get a list of service class implementations that match
 an interface name.  This searches both the current class path and
 the global repository for matches.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>iface</code> - The name of the required interface.</dd><dd><code>contextClass</code> - The class requesting the lookup (used for class resolution).</dd><dd><code>loader</code> - A class loader to use for searching for service definitions
               and loading classes.</dd>
<dt><span class="strong">Returns:</span></dt><dd>A list of matching provider classes.  Returns an empty list if there
         are no matches.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.Exception</code> - Thrown for any classloading exceptions thrown
                      trying to load a provider class.</dd></dl>
</li>
</ul>
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<h4>lookupByJREPropertyFile</h4>
<pre>public static&nbsp;java.lang.String&nbsp;lookupByJREPropertyFile(java.lang.String&nbsp;path,
                                       java.lang.String&nbsp;property)
                                                throws java.io.IOException</pre>
<div class="block">Perform a service class discovery by looking for a
 property in a target properties file located in the
 java.home directory.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>path</code> - The relative path to the desired properties file.</dd><dd><code>property</code> - The name of the required property.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The value of the named property within the properties file.  Returns
         null if the property doesn't exist or the properties file doesn't exist.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.io.IOException</code></dd></dl>
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