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| <h2 title="Annotation Type MatrixParam" class="title">Annotation Type MatrixParam</h2> |
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| <pre>@Target(value={PARAMETER,METHOD,FIELD}) |
| @Retention(value=RUNTIME) |
| @Documented |
| public @interface <span class="memberNameLabel">MatrixParam</span></pre> |
| <div class="block">Binds the value(s) of a URI matrix parameter to a resource method parameter, resource class field, or resource class |
| bean property. Values are URL decoded unless this is disabled using the <a href="../../../jakarta/ws/rs/Encoded.html" title="annotation in jakarta.ws.rs"><code>Encoded</code></a> annotation. A default value |
| can be specified using the <a href="../../../jakarta/ws/rs/DefaultValue.html" title="annotation in jakarta.ws.rs"><code>DefaultValue</code></a> annotation. |
| <p> |
| Note that the <code>@MatrixParam</code> <a href="../../../jakarta/ws/rs/MatrixParam.html#value--"><code>annotation value</code></a> refers to a name of a matrix parameter that |
| resides in the last matched path segment of the <a href="../../../jakarta/ws/rs/Path.html" title="annotation in jakarta.ws.rs"><code>Path</code></a>-annotated Java structure that injects the value of the |
| matrix parameter. |
| </p> |
| <p> |
| The type <code>T</code> of the annotated parameter, field or property must either: |
| </p> |
| <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, <code>Integer.valueOf(String)</code>)</li> |
| <li>Have a registered implementation of <a href="../../../jakarta/ws/rs/ext/ParamConverterProvider.html" title="interface in jakarta.ws.rs.ext"><code>ParamConverterProvider</code></a> JAX-RS extension SPI that |
| returns a <a href="../../../jakarta/ws/rs/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 matrix 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="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../jakarta/ws/rs/DefaultValue.html" title="annotation in jakarta.ws.rs"><code>DefaultValue</code></a>, |
| <a href="../../../jakarta/ws/rs/Encoded.html" title="annotation in jakarta.ws.rs"><code>Encoded</code></a>, |
| <a href="http://www.w3.org/DesignIssues/MatrixURIs.html">Matrix URIs</a></dd> |
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| <h3>Required Element Summary</h3> |
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| <caption><span>Required Elements</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Required Element and Description</th> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>java.lang.String</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../jakarta/ws/rs/MatrixParam.html#value--">value</a></span></code> |
| <div class="block">Defines the name of the URI matrix parameter 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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| <a name="value--"> |
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| <h4>value</h4> |
| <pre>public abstract java.lang.String value</pre> |
| <div class="block">Defines the name of the URI matrix parameter whose value will be used to initialize the value of the annotated method |
| argument, class field or bean property. The name is specified in decoded form, any percent encoded literals within |
| the value will not be decoded and will instead be treated as literal text. E.g. if the parameter name is "a b" then |
| the value of the annotation is "a b", <i>not</i> "a+b" or "a%20b".</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>URI matrix parameter name.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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