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<div class="subTitle">org.osgi.service.component.annotations</div>
<h2 title="Annotation Type Reference" class="title">Annotation Type Reference</h2>
</div>
<div class="contentContainer">
<div class="description">
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<hr>
<br>
<pre>@Retention(value=CLASS)
 @Target(value={METHOD,FIELD})
public @interface <span class="memberNameLabel">Reference</span></pre>
<div class="block">Identify the annotated method as a <code>bind</code> method of a Service
 Component.
 
 <p>
 The annotated method is a bind method of the Component.
 
 <p>
 This annotation is not processed at runtime by a Service Component Runtime
 implementation. It must be processed by tools and used to add a Component
 Description to the bundle.
 
 <p>
 In the generated Component Description for a component, the references must
 be ordered in ascending lexicographical order (using <code>String.compareTo</code>
 ) of the reference <a href="../../../../../org/osgi/service/component/annotations/Reference.html#name--"><code>name</code></a>s.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The reference element of a Component Description."</dd>
</dl>
</li>
</ul>
</div>
<div class="summary">
<ul class="blockList">
<li class="blockList">
<!-- =========== ANNOTATION TYPE OPTIONAL MEMBER SUMMARY =========== -->
<ul class="blockList">
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</a>
<h3>Optional Element Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Optional Element Summary table, listing optional elements, and an explanation">
<caption><span>Optional Elements</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Optional Element and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#bind--">bind</a></span></code>
<div class="block">The name of the bind method for this reference.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/osgi/service/component/annotations/ReferenceCardinality.html" title="enum in org.osgi.service.component.annotations">ReferenceCardinality</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#cardinality--">cardinality</a></span></code>
<div class="block">The cardinality of the reference.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#field--">field</a></span></code>
<div class="block">The name of the field for this reference.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/osgi/service/component/annotations/FieldOption.html" title="enum in org.osgi.service.component.annotations">FieldOption</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#fieldOption--">fieldOption</a></span></code>
<div class="block">The field option for this reference.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#name--">name</a></span></code>
<div class="block">The name of this reference.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/osgi/service/component/annotations/ReferencePolicy.html" title="enum in org.osgi.service.component.annotations">ReferencePolicy</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#policy--">policy</a></span></code>
<div class="block">The policy for the reference.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/osgi/service/component/annotations/ReferencePolicyOption.html" title="enum in org.osgi.service.component.annotations">ReferencePolicyOption</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#policyOption--">policyOption</a></span></code>
<div class="block">The policy option for this reference.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/osgi/service/component/annotations/ReferenceScope.html" title="enum in org.osgi.service.component.annotations">ReferenceScope</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#scope--">scope</a></span></code>
<div class="block">The reference scope for this reference.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.Class&lt;?&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#service--">service</a></span></code>
<div class="block">The type of the service to bind to this reference.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#target--">target</a></span></code>
<div class="block">The target filter for the reference.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#unbind--">unbind</a></span></code>
<div class="block">The name of the unbind method for this reference.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/osgi/service/component/annotations/Reference.html#updated--">updated</a></span></code>
<div class="block">The name of the updated method which is associated with the annotated
 bind method.</div>
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</tr>
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</li>
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<h3>Element Detail</h3>
<a name="name--">
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<h4>name</h4>
<pre>public abstract&nbsp;java.lang.String&nbsp;name</pre>
<div class="block">The name of this reference.
 
 <p>
 If not specified, the name of this reference is based upon the name of
 the method being annotated. If the method name begins with <code>bind</code>,
 <code>set</code> or <code>add</code>, that is removed.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The name attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>""</dd>
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</li>
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<h4>service</h4>
<pre>public abstract&nbsp;java.lang.Class&lt;?&gt;&nbsp;service</pre>
<div class="block">The type of the service to bind to this reference.
 
 <p>
 If not specified, the type of the service to bind is based upon the type
 of the first argument of the method being annotated.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The interface attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>java.lang.Object.class</dd>
</dl>
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</li>
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<h4>cardinality</h4>
<pre>public abstract&nbsp;<a href="../../../../../org/osgi/service/component/annotations/ReferenceCardinality.html" title="enum in org.osgi.service.component.annotations">ReferenceCardinality</a>&nbsp;cardinality</pre>
<div class="block">The cardinality of the reference.
 
 <p>
 If not specified, the reference has a
 <a href="../../../../../org/osgi/service/component/annotations/ReferenceCardinality.html#MANDATORY"><code>1..1</code></a> cardinality.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The cardinality attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>org.osgi.service.component.annotations.ReferenceCardinality.MANDATORY</dd>
</dl>
</li>
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</li>
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<h4>policy</h4>
<pre>public abstract&nbsp;<a href="../../../../../org/osgi/service/component/annotations/ReferencePolicy.html" title="enum in org.osgi.service.component.annotations">ReferencePolicy</a>&nbsp;policy</pre>
<div class="block">The policy for the reference.
 
 <p>
 If not specified, the <a href="../../../../../org/osgi/service/component/annotations/ReferencePolicy.html#STATIC"><code>STATIC</code></a> reference
 policy is used.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The policy attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>org.osgi.service.component.annotations.ReferencePolicy.STATIC</dd>
</dl>
</li>
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<h4>target</h4>
<pre>public abstract&nbsp;java.lang.String&nbsp;target</pre>
<div class="block">The target filter for the reference.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The target attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>""</dd>
</dl>
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</li>
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<h4>policyOption</h4>
<pre>public abstract&nbsp;<a href="../../../../../org/osgi/service/component/annotations/ReferencePolicyOption.html" title="enum in org.osgi.service.component.annotations">ReferencePolicyOption</a>&nbsp;policyOption</pre>
<div class="block">The policy option for this reference.
 
 <p>
 If not specified, the <a href="../../../../../org/osgi/service/component/annotations/ReferencePolicyOption.html#RELUCTANT"><code>RELUCTANT</code></a>
 reference policy option is used.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.2</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The policy-option attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>org.osgi.service.component.annotations.ReferencePolicyOption.RELUCTANT</dd>
</dl>
</li>
</ul>
</li>
</ul>
<ul class="blockList">
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<h4>scope</h4>
<pre>public abstract&nbsp;<a href="../../../../../org/osgi/service/component/annotations/ReferenceScope.html" title="enum in org.osgi.service.component.annotations">ReferenceScope</a>&nbsp;scope</pre>
<div class="block">The reference scope for this reference.
 
 <p>
 If not specified, the name of the unbind method is derived from the name
 of the annotated bind method. If the annotated method name begins with
 <code>bind</code>, <code>set</code> or <code>add</code>, that is replaced with
 <code>unbind</code>, <code>unset</code> or <code>remove</code>, respectively, to derive
 the unbind method name. Otherwise, <code>un</code> is prefixed to the
 annotated method name to derive the unbind method name. The unbind method
 is only set if the component type contains a method with the derived
 name.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.3</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The scope attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>org.osgi.service.component.annotations.ReferenceScope.BUNDLE</dd>
</dl>
</li>
</ul>
</li>
</ul>
<ul class="blockList">
<li class="blockList"><a name="bind--">
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</a>
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<h4>bind</h4>
<pre>public abstract&nbsp;java.lang.String&nbsp;bind</pre>
<div class="block">The name of the bind method for this reference.
 
 <p>
 If not specified, the <a href="../../../../../org/osgi/service/component/annotations/ReferencePolicyOption.html#RELUCTANT"><code>RELUCTANT</code></a>
 reference policy option is used.
 
 <p>
 If not specified, the name of the bind method is based upon how this
 annotation is used:
 <ul>
 <li>Annotated method - The name of the annotated method is the name of
 the bind method.</li>
 <li>Annotated field - There is no bind method name.</li>
 <li><a href="../../../../../org/osgi/service/component/annotations/Component.html#reference--"><code>Component.reference()</code></a> element - There is no bind method name.
 </li>
 </ul>
 
 <p>
 If there is a bind method name, the component must contain a method with
 that name.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.3</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The bind attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>""</dd>
</dl>
</li>
</ul>
</li>
</ul>
<ul class="blockList">
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<h4>updated</h4>
<pre>public abstract&nbsp;java.lang.String&nbsp;updated</pre>
<div class="block">The name of the updated method which is associated with the annotated
 bind method.
 
 <p>
 To declare no updated method, the value <code>"-"</code> must be used.
 
 <p>
 If not specified, the name of the updated method is derived from the name
 of the annotated bind method. If the annotated method name begins with
 <code>bind</code>, <code>set</code> or <code>add</code>, that is replaced with
 <code>updated</code> to derive the updated method name. Otherwise,
 <code>updated</code> is prefixed to the annotated method name to derive the
 updated method name. The updated method is only set if the component type
 contains a method with the derived name.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.2</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The updated attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>""</dd>
</dl>
</li>
</ul>
</li>
</ul>
<ul class="blockList">
<li class="blockList"><a name="unbind--">
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</a>
<ul class="blockList">
<li class="blockList">
<h4>unbind</h4>
<pre>public abstract&nbsp;java.lang.String&nbsp;unbind</pre>
<div class="block">The name of the unbind method for this reference.
 
 <p>
 If not specified, the name of the unbind method is based upon how this
 annotation is used:
 <ul>
 <li>Annotated method - The name of the unbind method is created from the
 name of the annotated method. If the name of the annotated method begins
 with <code>bind</code>, <code>set</code> or <code>add</code>, that prefix is replaced
 with <code>unbind</code>, <code>unset</code> or <code>remove</code>, respectively, to
 create the name candidate for the unbind method. Otherwise, <code>un</code> is
 prefixed to the name of the annotated method to create the name candidate
 for the unbind method. If the component type contains a method with the
 candidate name, the candidate name is used as the name of the unbind
 method. To declare no unbind method when the component type contains a
 method with the candidate name, the value <code>"-"</code> must be used.</li>
 <li>Annotated field - There is no unbind method name.</li>
 <li><a href="../../../../../org/osgi/service/component/annotations/Component.html#reference--"><code>Component.reference()</code></a> element - There is no unbind method
 name.</li>
 </ul>
 
 <p>
 If there is an unbind method name, the component must contain a method
 with that name.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The unbind attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>""</dd>
</dl>
</li>
</ul>
</li>
</ul>
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<li class="blockList"><a name="field--">
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<h4>field</h4>
<pre>public abstract&nbsp;java.lang.String&nbsp;field</pre>
<div class="block">The name of the field for this reference.
 
 <p>
 If specified and this reference annotates a field, the specified name
 must match the name of the annotated field.
 
 <p>
 If not specified, the name of the field is based upon how this annotation
 is used:
 <ul>
 <li>Annotated method - There is no field name.</li>
 <li>Annotated field - The name of the annotated field is the name of the
 field.</li>
 <li><a href="../../../../../org/osgi/service/component/annotations/Component.html#reference--"><code>Component.reference()</code></a> element - There is no field name.</li>
 </ul>
 
 <p>
 If there is a field name, the component must contain a field with that
 name.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.3</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The field attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>""</dd>
</dl>
</li>
</ul>
</li>
</ul>
<ul class="blockList">
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<h4>fieldOption</h4>
<pre>public abstract&nbsp;<a href="../../../../../org/osgi/service/component/annotations/FieldOption.html" title="enum in org.osgi.service.component.annotations">FieldOption</a>&nbsp;fieldOption</pre>
<div class="block">The field option for this reference.
 
 <p>
 If not specified, the field option is based upon how this annotation is
 used:
 <ul>
 <li>Annotated method - There is no field option.</li>
 <li>Annotated field - The field option is based upon the policy and
 cardinality of the reference and the modifiers of the field. If the
 policy is <a href="../../../../../org/osgi/service/component/annotations/ReferencePolicy.html#DYNAMIC"><code>ReferencePolicy.DYNAMIC</code></a>, the cardinality is
 <a href="../../../../../org/osgi/service/component/annotations/ReferenceCardinality.html#MULTIPLE"><code>0..n</code></a> or
 <a href="../../../../../org/osgi/service/component/annotations/ReferenceCardinality.html#AT_LEAST_ONE"><code>1..n</code></a>, and the field is declared
 <code>final</code>, the field option is <a href="../../../../../org/osgi/service/component/annotations/FieldOption.html#UPDATE"><code>FieldOption.UPDATE</code></a>. Otherwise,
 the field option is <a href="../../../../../org/osgi/service/component/annotations/FieldOption.html#REPLACE"><code>FieldOption.REPLACE</code></a></li>
 <li><a href="../../../../../org/osgi/service/component/annotations/Component.html#reference--"><code>Component.reference()</code></a> element - There is no field option.</li>
 </ul></div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.3</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd>"The field-option attribute of the reference element of a Component Description."</dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>org.osgi.service.component.annotations.FieldOption.REPLACE</dd>
</dl>
</li>
</ul>
</li>
</ul>
</li>
</ul>
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