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| <h2 title="Interface Feature" class="title">Interface Feature</h2> |
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| <pre>public interface <span class="typeNameLabel">Feature</span></pre> |
| <div class="block">A feature extension contract. |
| |
| Typically encapsulates a concept or facility that involves configuration of multiple providers |
| (e.g. filters or interceptors) and/or properties. |
| <p> |
| A <code>Feature</code> is a special type of configuration meta-provider. Once a feature is registered, |
| its <a href="../../../../javax/ws/rs/core/Feature.html#configure-javax.ws.rs.core.FeatureContext-"><code>configure(FeatureContext)</code></a> method is invoked during runtime configuration and bootstrapping |
| phase allowing the feature to further configure the runtime context in which it has been registered. |
| From within the invoked <code>configure(...)</code> method a feature may provide additional runtime configuration |
| for the facility or conceptual domain it represents, such as registering additional contract providers, |
| including nested features and/or specifying domain-specific properties. |
| </p> |
| <p> |
| Features implementing this interface MAY be annotated with the <a href="../../../../javax/ws/rs/ext/Provider.html" title="annotation in javax.ws.rs.ext"><code>@Provider</code></a> |
| annotation in order to be discovered by the runtime when scanning for resources and providers. |
| Please note that this will only work for server side features. Features in the Client API must |
| be registered programmatically. |
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| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>2.0</dd> |
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| <h3>Method Summary</h3> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/ws/rs/core/Feature.html#configure-javax.ws.rs.core.FeatureContext-">configure</a></span>(<a href="../../../../javax/ws/rs/core/FeatureContext.html" title="interface in javax.ws.rs.core">FeatureContext</a> context)</code> |
| <div class="block">A call-back method called when the feature is to be enabled in a given |
| runtime configuration scope.</div> |
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| <h4>configure</h4> |
| <pre>boolean configure(<a href="../../../../javax/ws/rs/core/FeatureContext.html" title="interface in javax.ws.rs.core">FeatureContext</a> context)</pre> |
| <div class="block">A call-back method called when the feature is to be enabled in a given |
| runtime configuration scope. |
| |
| The responsibility of the feature is to properly update the supplied runtime configuration context |
| and return <code>true</code> if the feature was successfully enabled or <code>false</code> otherwise. |
| <p> |
| Note that under some circumstances the feature may decide not to enable itself, which |
| is indicated by returning <code>false</code>. In such case the configuration context does |
| not add the feature to the collection of enabled features and a subsequent call to |
| <a href="../../../../javax/ws/rs/core/Configuration.html#isEnabled-javax.ws.rs.core.Feature-"><code>Configuration.isEnabled(Feature)</code></a> or <a href="../../../../javax/ws/rs/core/Configuration.html#isEnabled-java.lang.Class-"><code>Configuration.isEnabled(Class)</code></a> method |
| would return <code>false</code>. |
| </p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>context</code> - configurable context in which the feature should be enabled.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> if the feature was successfully enabled, <code>false</code> |
| otherwise.</dd> |
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