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| <li>Summary: </li> |
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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">jakarta.ws.rs</a></div> |
| <h2 title="Annotation Type HeaderParam" class="title">Annotation Type HeaderParam</h2> |
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| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Target.html?is-external=true" title="class or interface in java.lang.annotation" class="externalLink">@Target</a>({<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/ElementType.html?is-external=true#PARAMETER" title="class or interface in java.lang.annotation" class="externalLink">PARAMETER</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/ElementType.html?is-external=true#METHOD" title="class or interface in java.lang.annotation" class="externalLink">METHOD</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/ElementType.html?is-external=true#FIELD" title="class or interface in java.lang.annotation" class="externalLink">FIELD</a>}) |
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| public @interface <span class="memberNameLabel">HeaderParam</span></pre> |
| <div class="block">Binds the value(s) of a HTTP header to a resource method parameter, resource class field, or resource class bean |
| property. A default value can be specified using the <a href="DefaultValue.html" title="annotation in jakarta.ws.rs"><code>DefaultValue</code></a> annotation. |
| |
| The type <code>T</code> of the annotated parameter, field or property must either: |
| <ol> |
| <li>Be a primitive type</li> |
| <li>Have a constructor that accepts a single <code>String</code> argument</li> |
| <li>Have a static method named <code>valueOf</code> or <code>fromString</code> that accepts a single <code>String</code> argument |
| (see, for example, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true#valueOf(java.lang.String)" title="class or interface in java.lang" class="externalLink"><code>Integer.valueOf(String)</code></a>)</li> |
| <li>Have a registered implementation of <a href="ext/ParamConverterProvider.html" title="interface in jakarta.ws.rs.ext"><code>ParamConverterProvider</code></a> JAX-RS extension SPI that |
| returns a <a href="ext/ParamConverter.html" title="interface in jakarta.ws.rs.ext"><code>ParamConverter</code></a> instance capable of a "from string" conversion for the type.</li> |
| <li>Be <code>List<T></code>, <code>Set<T></code> or <code>SortedSet<T></code>, where <code>T</code> satisfies 2, 3 or 4 above. The |
| resulting collection is read-only.</li> |
| </ol> |
| |
| <p> |
| If the type is not one of the collection types listed in 5 above and the header parameter is represented by multiple |
| values then the first value (lexically) of the parameter is used. |
| </p> |
| |
| <p> |
| Because injection occurs at object creation time, use of this annotation on resource class fields and bean properties |
| is only supported for the default per-request resource class lifecycle. Resource classes using other lifecycles |
| should only use this annotation on resource method parameters. |
| </p></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.0</dd> |
| <dt><span class="simpleTagLabel">Author:</span></dt> |
| <dd>Paul Sandoz, Marc Hadley</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="DefaultValue.html" title="annotation in jakarta.ws.rs"><code>DefaultValue</code></a>, |
| <a href="core/HttpHeaders.html" title="interface in jakarta.ws.rs.core"><code>HttpHeaders</code></a></dd> |
| </dl> |
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| <h3>Required Element Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Required Elements</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Required Element</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#value()">value</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Defines the name of the HTTP header whose value will be used to initialize the value of the annotated method |
| argument, class field or bean property.</div> |
| </td> |
| </tr> |
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| <h4>value</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> value</pre> |
| <div class="block">Defines the name of the HTTP header whose value will be used to initialize the value of the annotated method |
| argument, class field or bean property. Case insensitive.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>HTTP header name.</dd> |
| </dl> |
| </li> |
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