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<div class="subTitle">org.apache.felix.dm.context</div>
<h2 title="Interface ComponentContext" class="title">Interface ComponentContext</h2>
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<dt>All Superinterfaces:</dt>
<dd><a href="../../../../../org/apache/felix/dm/Component.html" title="interface in org.apache.felix.dm">Component</a></dd>
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<pre>public interface <span class="strong">ComponentContext</span>
extends <a href="../../../../../org/apache/felix/dm/Component.html" title="interface in org.apache.felix.dm">Component</a></pre>
<div class="block">This interface is the entry point to the Component implementation context.
It is used by all DependencyManager Dependency implementations.</div>
<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../org/apache/felix/dm/context/DependencyContext.html" title="interface in org.apache.felix.dm.context"><code>interface</code></a></dd></dl>
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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>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#getAutoConfig(java.lang.Class)">getAutoConfig</a></strong>(java.lang.Class&lt;?&gt;&nbsp;clazz)</code>
<div class="block">Indicates if an object of the given class can be injected in one field of the component</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#getAutoConfigInstance(java.lang.Class)">getAutoConfigInstance</a></strong>(java.lang.Class&lt;?&gt;&nbsp;clazz)</code>
<div class="block">Returns the component instance field that is assignable to a given class type</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>Bundle</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#getBundle()">getBundle</a></strong>()</code>
<div class="block">Returns the Compoent's bundle.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>BundleContext</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#getBundleContext()">getBundleContext</a></strong>()</code>
<div class="block">Returns the Component's bundle context</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.util.List&lt;<a href="../../../../../org/apache/felix/dm/context/DependencyContext.html" title="interface in org.apache.felix.dm.context">DependencyContext</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#getDependencies()">getDependencies</a></strong>()</code>
<div class="block">Returns the list of dependencies that has been registered on this component</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/felix/dm/context/Event.html" title="class in org.apache.felix.dm.context">Event</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#getDependencyEvent(org.apache.felix.dm.context.DependencyContext)">getDependencyEvent</a></strong>(<a href="../../../../../org/apache/felix/dm/context/DependencyContext.html" title="interface in org.apache.felix.dm.context">DependencyContext</a>&nbsp;dc)</code>
<div class="block">Returns the highest ranked dependency service instance for a given dependency</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.util.Set&lt;<a href="../../../../../org/apache/felix/dm/context/Event.html" title="class in org.apache.felix.dm.context">Event</a>&gt;</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#getDependencyEvents(org.apache.felix.dm.context.DependencyContext)">getDependencyEvents</a></strong>(<a href="../../../../../org/apache/felix/dm/context/DependencyContext.html" title="interface in org.apache.felix.dm.context">DependencyContext</a>&nbsp;dc)</code>
<div class="block">Returns all the available dependency services for a given dependency</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.Object[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#getInstances()">getInstances</a></strong>()</code>
<div class="block">Returns the component instances</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/felix/dm/Logger.html" title="class in org.apache.felix.dm">Logger</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#getLogger()">getLogger</a></strong>()</code>
<div class="block">Returns the logger which can be used by the DependencyManager Dependencies implementations.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#handleEvent(org.apache.felix.dm.context.DependencyContext,%20org.apache.felix.dm.context.EventType,%20org.apache.felix.dm.context.Event...)">handleEvent</a></strong>(<a href="../../../../../org/apache/felix/dm/context/DependencyContext.html" title="interface in org.apache.felix.dm.context">DependencyContext</a>&nbsp;dc,
<a href="../../../../../org/apache/felix/dm/context/EventType.html" title="enum in org.apache.felix.dm.context">EventType</a>&nbsp;type,
<a href="../../../../../org/apache/felix/dm/context/Event.html" title="class in org.apache.felix.dm.context">Event</a>...&nbsp;event)</code>
<div class="block">Notifies the Component about a dependency event.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#invokeCallbackMethod(java.lang.Object[],%20java.lang.String,%20java.lang.Class[][],%20java.lang.Object[][])">invokeCallbackMethod</a></strong>(java.lang.Object[]&nbsp;instances,
java.lang.String&nbsp;methodName,
java.lang.Class&lt;?&gt;[][]&nbsp;signatures,
java.lang.Object[][]&nbsp;parameters)</code>
<div class="block">Invoke a component callback method with a given dependency service instance</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#isActive()">isActive</a></strong>()</code>
<div class="block">Is this component already started ?</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#isAvailable()">isAvailable</a></strong>()</code>
<div class="block">Is this component available (all required dependencies are available) ?</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#setThreadPool(java.util.concurrent.Executor)">setThreadPool</a></strong>(java.util.concurrent.Executor&nbsp;threadPool)</code>
<div class="block">Sets a threadpool that the component will use when handling external events</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#start()">start</a></strong>()</code>
<div class="block">Starts the component.</div>
</td>
</tr>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/felix/dm/context/ComponentContext.html#stop()">stop</a></strong>()</code>
<div class="block">Stops the component.</div>
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<h3>Methods inherited from interface&nbsp;org.apache.felix.dm.<a href="../../../../../org/apache/felix/dm/Component.html" title="interface in org.apache.felix.dm">Component</a></h3>
<code><a href="../../../../../org/apache/felix/dm/Component.html#add(org.apache.felix.dm.ComponentStateListener)">add</a>, <a href="../../../../../org/apache/felix/dm/Component.html#add(org.apache.felix.dm.Dependency...)">add</a>, <a href="../../../../../org/apache/felix/dm/Component.html#getComponentDeclaration()">getComponentDeclaration</a>, <a href="../../../../../org/apache/felix/dm/Component.html#getDependencyManager()">getDependencyManager</a>, <a href="../../../../../org/apache/felix/dm/Component.html#getInstance()">getInstance</a>, <a href="../../../../../org/apache/felix/dm/Component.html#getServiceProperties()">getServiceProperties</a>, <a href="../../../../../org/apache/felix/dm/Component.html#getServiceRegistration()">getServiceRegistration</a>, <a href="../../../../../org/apache/felix/dm/Component.html#remove(org.apache.felix.dm.ComponentStateListener)">remove</a>, <a href="../../../../../org/apache/felix/dm/Component.html#remove(org.apache.felix.dm.Dependency)">remove</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setAutoConfig(java.lang.Class,%20boolean)">setAutoConfig</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setAutoConfig(java.lang.Class,%20java.lang.String)">setAutoConfig</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setCallbacks(java.lang.Object,%20java.lang.String,%20java.lang.String,%20java.lang.String,%20java.lang.String)">setCallbacks</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setCallbacks(java.lang.String,%20java.lang.String,%20java.lang.String,%20java.lang.String)">setCallbacks</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setComposition(java.lang.Object,%20java.lang.String)">setComposition</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setComposition(java.lang.String)">setComposition</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setDebug(java.lang.String)">setDebug</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setFactory(java.lang.Object,%20java.lang.String)">setFactory</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setFactory(java.lang.String)">setFactory</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setImplementation(java.lang.Object)">setImplementation</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setInterface(java.lang.String[],%20java.util.Dictionary)">setInterface</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setInterface(java.lang.String,%20java.util.Dictionary)">setInterface</a>, <a href="../../../../../org/apache/felix/dm/Component.html#setServiceProperties(java.util.Dictionary)">setServiceProperties</a></code></li>
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<h4>getLogger</h4>
<pre><a href="../../../../../org/apache/felix/dm/Logger.html" title="class in org.apache.felix.dm">Logger</a>&nbsp;getLogger()</pre>
<div class="block">Returns the logger which can be used by the DependencyManager Dependencies implementations.</div>
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<h4>getBundleContext</h4>
<pre>BundleContext&nbsp;getBundleContext()</pre>
<div class="block">Returns the Component's bundle context</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>the Component's bundle context</dd></dl>
</li>
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<a name="getBundle()">
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<h4>getBundle</h4>
<pre>Bundle&nbsp;getBundle()</pre>
<div class="block">Returns the Compoent's bundle.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>the Compoent's bundle.</dd></dl>
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<h4>setThreadPool</h4>
<pre>void&nbsp;setThreadPool(java.util.concurrent.Executor&nbsp;threadPool)</pre>
<div class="block">Sets a threadpool that the component will use when handling external events</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>threadPool</code> - a threadpool used to handle component events and invoke the component's lifecycle callbacks</dd></dl>
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<h4>start</h4>
<pre>void&nbsp;start()</pre>
<div class="block">Starts the component. All initial dependencies previously added to the component will be started.</div>
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<h4>stop</h4>
<pre>void&nbsp;stop()</pre>
<div class="block">Stops the component.</div>
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<pre>boolean&nbsp;isActive()</pre>
<div class="block">Is this component already started ?</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>true if this component has been started</dd></dl>
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<pre>boolean&nbsp;isAvailable()</pre>
<div class="block">Is this component available (all required dependencies are available) ?</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>true if this component is available (all dependencies are available), or false</dd></dl>
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<a name="handleEvent(org.apache.felix.dm.context.DependencyContext, org.apache.felix.dm.context.EventType, org.apache.felix.dm.context.Event...)">
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<h4>handleEvent</h4>
<pre>void&nbsp;handleEvent(<a href="../../../../../org/apache/felix/dm/context/DependencyContext.html" title="interface in org.apache.felix.dm.context">DependencyContext</a>&nbsp;dc,
<a href="../../../../../org/apache/felix/dm/context/EventType.html" title="enum in org.apache.felix.dm.context">EventType</a>&nbsp;type,
<a href="../../../../../org/apache/felix/dm/context/Event.html" title="class in org.apache.felix.dm.context">Event</a>...&nbsp;event)</pre>
<div class="block">Notifies the Component about a dependency event.
An event is for example fired when:<p>
<ul>
<li> a dependency service becomes available <a href="../../../../../org/apache/felix/dm/context/EventType.html#ADDED"><code>EventType.ADDED</code></a>)
<li> a dependenc service has changed is changed <a href="../../../../../org/apache/felix/dm/context/EventType.html#CHANGED"><code>EventType.CHANGED</code></a>)
<li> a dependency service has been lost <a href="../../../../../org/apache/felix/dm/context/EventType.html#REMOVED"><code>EventType.REMOVED</code></a>)
<li> a dependency service has been swapped by another <a href="../../../../../org/apache/felix/dm/context/EventType.html#SWAPPED"><code>EventType.SWAPPED</code></a>)
</ul></div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>dc</code> - the dependency</dd><dd><code>type</code> - the dependency event type</dd><dd><code>e</code> - the dependency event</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../org/apache/felix/dm/context/EventType.html" title="enum in org.apache.felix.dm.context"><code>EventType</code></a></dd></dl>
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<h4>getDependencies</h4>
<pre>java.util.List&lt;<a href="../../../../../org/apache/felix/dm/context/DependencyContext.html" title="interface in org.apache.felix.dm.context">DependencyContext</a>&gt;&nbsp;getDependencies()</pre>
<div class="block">Returns the list of dependencies that has been registered on this component</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>the list of dependencies that has been registered on this component</dd></dl>
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<h4>invokeCallbackMethod</h4>
<pre>void&nbsp;invokeCallbackMethod(java.lang.Object[]&nbsp;instances,
java.lang.String&nbsp;methodName,
java.lang.Class&lt;?&gt;[][]&nbsp;signatures,
java.lang.Object[][]&nbsp;parameters)</pre>
<div class="block">Invoke a component callback method with a given dependency service instance</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>instances</code> - the component instances</dd><dd><code>methodName</code> - the method name</dd><dd><code>signatures</code> - the method signatures (types)</dd><dd><code>parameters</code> - the method parameters</dd></dl>
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<h4>getInstances</h4>
<pre>java.lang.Object[]&nbsp;getInstances()</pre>
<div class="block">Returns the component instances</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../org/apache/felix/dm/Component.html#getInstances()">getInstances</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/felix/dm/Component.html" title="interface in org.apache.felix.dm">Component</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the component instances</dd></dl>
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<h4>getAutoConfigInstance</h4>
<pre>java.lang.String&nbsp;getAutoConfigInstance(java.lang.Class&lt;?&gt;&nbsp;clazz)</pre>
<div class="block">Returns the component instance field that is assignable to a given class type</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>clazz</code> - the type of an object that has to be injected in the component instance field</dd>
<dt><span class="strong">Returns:</span></dt><dd>the name of the component instance field that can be assigned to an object having the same type as
the "clazz" parameter</dd></dl>
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<pre>boolean&nbsp;getAutoConfig(java.lang.Class&lt;?&gt;&nbsp;clazz)</pre>
<div class="block">Indicates if an object of the given class can be injected in one field of the component</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>clazz</code> - the class of an object that has to be injected in one of the component fields</dd>
<dt><span class="strong">Returns:</span></dt><dd>true if the component can be injected with an object having the specified "clazz" type.</dd></dl>
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<a name="getDependencyEvent(org.apache.felix.dm.context.DependencyContext)">
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<h4>getDependencyEvent</h4>
<pre><a href="../../../../../org/apache/felix/dm/context/Event.html" title="class in org.apache.felix.dm.context">Event</a>&nbsp;getDependencyEvent(<a href="../../../../../org/apache/felix/dm/context/DependencyContext.html" title="interface in org.apache.felix.dm.context">DependencyContext</a>&nbsp;dc)</pre>
<div class="block">Returns the highest ranked dependency service instance for a given dependency</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>dc</code> - the dependency</dd>
<dt><span class="strong">Returns:</span></dt><dd>the highest ranked dependency service instance for a given dependency</dd></dl>
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<h4>getDependencyEvents</h4>
<pre>java.util.Set&lt;<a href="../../../../../org/apache/felix/dm/context/Event.html" title="class in org.apache.felix.dm.context">Event</a>&gt;&nbsp;getDependencyEvents(<a href="../../../../../org/apache/felix/dm/context/DependencyContext.html" title="interface in org.apache.felix.dm.context">DependencyContext</a>&nbsp;dc)</pre>
<div class="block">Returns all the available dependency services for a given dependency</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>dc</code> - the dependency</dd>
<dt><span class="strong">Returns:</span></dt><dd>all the available dependency services for a given dependency</dd></dl>
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