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| <h2 title="Interface ConstructorInjector" class="title">Interface ConstructorInjector</h2> |
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| <pre>public interface <a href="../../../../src-html/org/apache/felix/ipojo/ConstructorInjector.html#line.33">ConstructorInjector</a></pre> |
| <div class="block">Interface implemented to support constructor parameter injection. |
| When a new POJO object has to be created, all constructor injectors are |
| called to gets the objects to injects as well as the type (to discover |
| the constructor). |
| Handlers willing to inject constructor parameters must register themselves |
| using <a href="../../../../org/apache/felix/ipojo/InstanceManager.html#register(int, org.apache.felix.ipojo.ConstructorInjector)"><code>InstanceManager.register(int, ConstructorInjector)</code></a> where |
| the integer is the parameter index. Only one injector can inject a value |
| for a specific index. If several injectors are registered for the same index, |
| the component type is declared as invalid.</div> |
| <dl><dt><span class="strong">Author:</span></dt> |
| <dd><a href="mailto:dev@felix.apache.org">Felix Project Team</a></dd></dl> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
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| <caption><span>Methods</span><span class="tabEnd"> </span></caption> |
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| <th class="colLast" scope="col">Method and Description</th> |
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| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/felix/ipojo/ConstructorInjector.html#getConstructorParameter(int)">getConstructorParameter</a></strong>(int index)</code> |
| <div class="block">Gets the object to inject in the constructor parameter.</div> |
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| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../org/apache/felix/ipojo/ConstructorInjector.html#getConstructorParameterType(int)">getConstructorParameterType</a></strong>(int index)</code> |
| <div class="block">Gets the type of the object to inject in the constructor parameter.</div> |
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| <h4>getConstructorParameter</h4> |
| <pre><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> <a href="../../../../src-html/org/apache/felix/ipojo/ConstructorInjector.html#line.40">getConstructorParameter</a>(int index)</pre> |
| <div class="block">Gets the object to inject in the constructor parameter.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>index</code> - the parameter index</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>the object to be injected.</dd></dl> |
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| <h4>getConstructorParameterType</h4> |
| <pre><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a> <a href="../../../../src-html/org/apache/felix/ipojo/ConstructorInjector.html#line.51">getConstructorParameterType</a>(int index)</pre> |
| <div class="block">Gets the type of the object to inject in the constructor parameter. |
| This is the type looked into the Pojo class, so it must match. |
| Returning <code>null</code> will try to get the class from the |
| injected object, however this can be wrong (implementation instead of interface, |
| boxed objects...) and error-prone.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>index</code> - the parameter index</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>the Class object (must fit also for primitive type)</dd></dl> |
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