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| <div class="subTitle">javax.ws.rs.ext</div> |
| <h2 title="Interface MessageBodyWriter" class="title">Interface MessageBodyWriter<T></h2> |
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| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>T</code> - the type that can be written.</dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public interface <span class="typeNameLabel">MessageBodyWriter<T></span></pre> |
| <div class="block">Contract for a provider that supports the conversion of a Java type to a |
| stream. |
| |
| A <code>MessageBodyWriter</code> implementation may be annotated |
| with <a href="../../../../javax/ws/rs/Produces.html" title="annotation in javax.ws.rs"><code>Produces</code></a> to restrict the media types for which it will |
| be considered suitable. |
| <p> |
| Providers implementing <code>MessageBodyWriter</code> contract must be either programmatically |
| registered in an API runtime or must be annotated with |
| <a href="../../../../javax/ws/rs/ext/Provider.html" title="annotation in javax.ws.rs.ext"><code>@Provider</code></a> annotation to be automatically discovered |
| by the runtime during a provider scanning phase. |
| </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/ext/Provider.html" title="annotation in javax.ws.rs.ext"><code>Provider</code></a>, |
| <a href="../../../../javax/ws/rs/Produces.html" title="annotation in javax.ws.rs"><code>Produces</code></a></dd> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </span></span><span id="t5" class="tableTab"><span><a href="javascript:show(16);">Default Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>default long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/ws/rs/ext/MessageBodyWriter.html#getSize-T-java.lang.Class-java.lang.reflect.Type-java.lang.annotation.Annotation:A-javax.ws.rs.core.MediaType-">getSize</a></span>(<a href="../../../../javax/ws/rs/ext/MessageBodyWriter.html" title="type parameter in MessageBodyWriter">T</a> t, |
| java.lang.Class<?> type, |
| java.lang.reflect.Type genericType, |
| java.lang.annotation.Annotation[] annotations, |
| <a href="../../../../javax/ws/rs/core/MediaType.html" title="class in javax.ws.rs.core">MediaType</a> mediaType)</code> |
| <div class="block">Originally, the method has been called before <code>writeTo</code> to ascertain the length in bytes of |
| the serialized form of <code>t</code>.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/ws/rs/ext/MessageBodyWriter.html#isWriteable-java.lang.Class-java.lang.reflect.Type-java.lang.annotation.Annotation:A-javax.ws.rs.core.MediaType-">isWriteable</a></span>(java.lang.Class<?> type, |
| java.lang.reflect.Type genericType, |
| java.lang.annotation.Annotation[] annotations, |
| <a href="../../../../javax/ws/rs/core/MediaType.html" title="class in javax.ws.rs.core">MediaType</a> mediaType)</code> |
| <div class="block">Ascertain if the MessageBodyWriter supports a particular type.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../javax/ws/rs/ext/MessageBodyWriter.html#writeTo-T-java.lang.Class-java.lang.reflect.Type-java.lang.annotation.Annotation:A-javax.ws.rs.core.MediaType-javax.ws.rs.core.MultivaluedMap-java.io.OutputStream-">writeTo</a></span>(<a href="../../../../javax/ws/rs/ext/MessageBodyWriter.html" title="type parameter in MessageBodyWriter">T</a> t, |
| java.lang.Class<?> type, |
| java.lang.reflect.Type genericType, |
| java.lang.annotation.Annotation[] annotations, |
| <a href="../../../../javax/ws/rs/core/MediaType.html" title="class in javax.ws.rs.core">MediaType</a> mediaType, |
| <a href="../../../../javax/ws/rs/core/MultivaluedMap.html" title="interface in javax.ws.rs.core">MultivaluedMap</a><java.lang.String,java.lang.Object> httpHeaders, |
| java.io.OutputStream entityStream)</code> |
| <div class="block">Write a type to an HTTP message.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
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| <!-- ============ METHOD DETAIL ========== --> |
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| <a name="isWriteable-java.lang.Class-java.lang.reflect.Type-java.lang.annotation.Annotation:A-javax.ws.rs.core.MediaType-"> |
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| <h4>isWriteable</h4> |
| <pre>boolean isWriteable(java.lang.Class<?> type, |
| java.lang.reflect.Type genericType, |
| java.lang.annotation.Annotation[] annotations, |
| <a href="../../../../javax/ws/rs/core/MediaType.html" title="class in javax.ws.rs.core">MediaType</a> mediaType)</pre> |
| <div class="block">Ascertain if the MessageBodyWriter supports a particular type.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>type</code> - the class of instance that is to be written.</dd> |
| <dd><code>genericType</code> - the type of instance to be written, obtained either |
| by reflection of a resource method return type or via inspection |
| of the returned instance. <a href="../../../../javax/ws/rs/core/GenericEntity.html" title="class in javax.ws.rs.core"><code>GenericEntity</code></a> |
| provides a way to specify this information at runtime.</dd> |
| <dd><code>annotations</code> - an array of the annotations attached to the message entity instance.</dd> |
| <dd><code>mediaType</code> - the media type of the HTTP entity.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> if the type is supported, otherwise <code>false</code>.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getSize-java.lang.Object-java.lang.Class-java.lang.reflect.Type-java.lang.annotation.Annotation:A-javax.ws.rs.core.MediaType-"> |
| <!-- --> |
| </a><a name="getSize-T-java.lang.Class-java.lang.reflect.Type-java.lang.annotation.Annotation:A-javax.ws.rs.core.MediaType-"> |
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| <h4>getSize</h4> |
| <pre>default long getSize(<a href="../../../../javax/ws/rs/ext/MessageBodyWriter.html" title="type parameter in MessageBodyWriter">T</a> t, |
| java.lang.Class<?> type, |
| java.lang.reflect.Type genericType, |
| java.lang.annotation.Annotation[] annotations, |
| <a href="../../../../javax/ws/rs/core/MediaType.html" title="class in javax.ws.rs.core">MediaType</a> mediaType)</pre> |
| <div class="block">Originally, the method has been called before <code>writeTo</code> to ascertain the length in bytes of |
| the serialized form of <code>t</code>. A non-negative return value has been used in a HTTP |
| <code>Content-Length</code> header. |
| <p> |
| As of version 2.0 of this API, the method has been deprecated and the value returned by the method is ignored |
| by an API runtime. All <code>MessageBodyWriter</code> implementations are advised to return <code>-1</code> |
| from the method. Responsibility to compute the actual <code>Content-Length</code> header value has been |
| delegated to the runtime. |
| </p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>t</code> - the instance to write</dd> |
| <dd><code>type</code> - the class of instance that is to be written.</dd> |
| <dd><code>genericType</code> - the type of instance to be written. <a href="../../../../javax/ws/rs/core/GenericEntity.html" title="class in javax.ws.rs.core"><code>GenericEntity</code></a> |
| provides a way to specify this information at runtime.</dd> |
| <dd><code>annotations</code> - an array of the annotations attached to the message entity instance.</dd> |
| <dd><code>mediaType</code> - the media type of the HTTP entity.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>length in bytes or -1 if the length cannot be determined in advance.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="writeTo-java.lang.Object-java.lang.Class-java.lang.reflect.Type-java.lang.annotation.Annotation:A-javax.ws.rs.core.MediaType-javax.ws.rs.core.MultivaluedMap-java.io.OutputStream-"> |
| <!-- --> |
| </a><a name="writeTo-T-java.lang.Class-java.lang.reflect.Type-java.lang.annotation.Annotation:A-javax.ws.rs.core.MediaType-javax.ws.rs.core.MultivaluedMap-java.io.OutputStream-"> |
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| <h4>writeTo</h4> |
| <pre>void writeTo(<a href="../../../../javax/ws/rs/ext/MessageBodyWriter.html" title="type parameter in MessageBodyWriter">T</a> t, |
| java.lang.Class<?> type, |
| java.lang.reflect.Type genericType, |
| java.lang.annotation.Annotation[] annotations, |
| <a href="../../../../javax/ws/rs/core/MediaType.html" title="class in javax.ws.rs.core">MediaType</a> mediaType, |
| <a href="../../../../javax/ws/rs/core/MultivaluedMap.html" title="interface in javax.ws.rs.core">MultivaluedMap</a><java.lang.String,java.lang.Object> httpHeaders, |
| java.io.OutputStream entityStream) |
| throws java.io.IOException, |
| <a href="../../../../javax/ws/rs/WebApplicationException.html" title="class in javax.ws.rs">WebApplicationException</a></pre> |
| <div class="block">Write a type to an HTTP message. The message header map is mutable |
| but any changes must be made before writing to the output stream since |
| the headers will be flushed prior to writing the message body.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>t</code> - the instance to write.</dd> |
| <dd><code>type</code> - the class of instance that is to be written.</dd> |
| <dd><code>genericType</code> - the type of instance to be written. <a href="../../../../javax/ws/rs/core/GenericEntity.html" title="class in javax.ws.rs.core"><code>GenericEntity</code></a> |
| provides a way to specify this information at runtime.</dd> |
| <dd><code>annotations</code> - an array of the annotations attached to the message entity instance.</dd> |
| <dd><code>mediaType</code> - the media type of the HTTP entity.</dd> |
| <dd><code>httpHeaders</code> - a mutable map of the HTTP message headers.</dd> |
| <dd><code>entityStream</code> - the <code>OutputStream</code> for the HTTP entity. The |
| implementation should not close the output stream.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.io.IOException</code> - if an IO error arises.</dd> |
| <dd><code><a href="../../../../javax/ws/rs/WebApplicationException.html" title="class in javax.ws.rs">WebApplicationException</a></code> - if a specific HTTP error response needs to be produced. |
| Only effective if thrown prior to the message being committed.</dd> |
| </dl> |
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