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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="../../../javax/ws/rs/Encoded.html" title="annotation in javax.ws.rs"><code>Encoded</code></a> |
| annotation. A default value can be specified using the <a href="../../../javax/ws/rs/DefaultValue.html" title="annotation in javax.ws.rs"><code>DefaultValue</code></a> |
| annotation. |
| <p> |
| Note that the <code>@MatrixParam</code> <a href="../../../javax/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="../../../javax/ws/rs/Path.html" title="annotation in javax.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="../../../javax/ws/rs/ext/ParamConverterProvider.html" title="interface in javax.ws.rs.ext"><code>ParamConverterProvider</code></a> |
| that returns a <a href="../../../javax/ws/rs/ext/ParamConverter.html" title="interface in javax.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="../../../javax/ws/rs/DefaultValue.html" title="annotation in javax.ws.rs"><code>DefaultValue</code></a>, |
| <a href="../../../javax/ws/rs/Encoded.html" title="annotation in javax.ws.rs"><code>Encoded</code></a>, |
| <a href="http://www.w3.org/DesignIssues/MatrixURIs.html">Matrix URIs</a></dd> |
| </dl> |
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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="../../../javax/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> |
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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> |
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