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| <li>Summary: </li> |
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| <div class="subTitle">org.apache.felix.dm.annotation.api</div> |
| <h2 title="Annotation Type BundleDependency" class="title">Annotation Type BundleDependency</h2> |
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| <pre>@Retention(value=CLASS) |
| @Target(value=METHOD) |
| public @interface <span class="memberNameLabel">BundleDependency</span></pre> |
| <div class="block">Annotates a class or method for a bundle dependency. A bundle dependency allows you to |
| depend on a bundle in a certain set of states (INSTALLED|RESOLVED|STARTED|...), as |
| indicated by a state mask. You can also use a filter condition that is matched against |
| all manifest entries. When applied on a class field, optional unavailable dependencies |
| are injected with a NullObject. |
| |
| <h3>Usage Examples</h3> |
| |
| <p> In the following example, the "SCR" Component allows to track |
| all bundles containing a specific "Service-Component" OSGi header, in order to load |
| and manage all Declarative Service components specified in the SCR xml documents referenced by the header: |
| |
| <blockquote> |
| <pre> |
| @Component |
| public class SCR { |
| @BundleDependency(required = false, removed = "unloadServiceComponents", filter = "(Service-Component=*)", stateMask = Bundle.ACTIVE) |
| void loadServiceComponents(Bundle b) { |
| String descriptorPaths = (String) b.getHeaders().get("Service-Component"); |
| // load all service component specified in the XML descriptorPaths files ... |
| } |
| |
| void unloadServiceComponents(Bundle b) { |
| // unload all service component we loaded from our "loadServiceComponents" method. |
| } |
| } |
| </pre> |
| </blockquote></div> |
| </li> |
| </ul> |
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| <div class="summary"> |
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| <!-- =========== ANNOTATION TYPE OPTIONAL MEMBER SUMMARY =========== --> |
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| <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"> </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/apache/felix/dm/annotation/api/BundleDependency.html#changed--">changed</a></span></code> |
| <div class="block">Returns the callback method to be invoked when the bundle have been updated</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/apache/felix/dm/annotation/api/BundleDependency.html#filter--">filter</a></span></code> |
| <div class="block">Returns the ldap filter dependency matching some bundle manifest headers</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/apache/felix/dm/annotation/api/BundleDependency.html#name--">name</a></span></code> |
| <div class="block">The name used when dynamically configuring this dependency from the init method.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/felix/dm/annotation/api/BundleDependency.html#propagate--">propagate</a></span></code> |
| <div class="block">Specifies if the manifest headers from the bundle should be propagated to the service properties.</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/apache/felix/dm/annotation/api/BundleDependency.html#removed--">removed</a></span></code> |
| <div class="block">Returns the callback method to invoke when the bundle is lost.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/felix/dm/annotation/api/BundleDependency.html#required--">required</a></span></code> |
| <div class="block">Returns whether the dependency is required or not.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/felix/dm/annotation/api/BundleDependency.html#stateMask--">stateMask</a></span></code> |
| <div class="block">Returns the bundle state mask</div> |
| </td> |
| </tr> |
| </table> |
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| </ul> |
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| <h4>changed</h4> |
| <pre>public abstract java.lang.String changed</pre> |
| <div class="block">Returns the callback method to be invoked when the bundle have been updated</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the change callback</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>""</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>removed</h4> |
| <pre>public abstract java.lang.String removed</pre> |
| <div class="block">Returns the callback method to invoke when the bundle is lost.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the remove callback</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>""</dd> |
| </dl> |
| </li> |
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| <h4>required</h4> |
| <pre>public abstract boolean required</pre> |
| <div class="block">Returns whether the dependency is required or not.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the required flag</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>true</dd> |
| </dl> |
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| <h4>filter</h4> |
| <pre>public abstract java.lang.String filter</pre> |
| <div class="block">Returns the ldap filter dependency matching some bundle manifest headers</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the filter</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>""</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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| <h4>stateMask</h4> |
| <pre>public abstract int stateMask</pre> |
| <div class="block">Returns the bundle state mask</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the state mask</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd><error></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>propagate</h4> |
| <pre>public abstract boolean propagate</pre> |
| <div class="block">Specifies if the manifest headers from the bundle should be propagated to the service properties. |
| The provided service properties take precedence over the propagated bundle manifest headers. |
| It means a bundle manifest header won't override a component service property having the same name.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the propagation flag</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>false</dd> |
| </dl> |
| </li> |
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| <h4>name</h4> |
| <pre>public abstract java.lang.String name</pre> |
| <div class="block">The name used when dynamically configuring this dependency from the init method. |
| Specifying this attribute allows to dynamically configure the dependency |
| <code>filter</code> and <code>required</code> flag from the Service's init method. |
| All unnamed dependencies will be injected before the init() method; so from the init() method, you can |
| then pick up whatever information needed from already injected (unnamed) dependencies, and configure dynamically |
| your named dependencies, which will then be calculated once the init() method returns. |
| |
| <p> See <a href="../../../../../../org/apache/felix/dm/annotation/api/Init.html" title="annotation in org.apache.felix.dm.annotation.api"><code>Init</code></a> annotation for an example usage of a dependency dynamically configured from the init method.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the dependency name used to dynamically configure the dependency from the init callback</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>""</dd> |
| </dl> |
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