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| <html lang="en"> |
| <head> |
| <link rel="stylesheet" type="text/css" href="../stylesheets/style.css"> |
| <title>Extension Type</title> |
| </head> |
| |
| <body> |
| <h2 id="fileset">Extension</h2> |
| <p>Utility type that represents either an available "Optional Package" (formerly known as "Standard |
| Extension") as described in the manifest of a JAR file, or the requirement for such an optional |
| package.</p> |
| <p>Note that this type works with extensions as defined by the "Optional Package" specification. |
| For more information about optional packages, see the document <em>Optional Package Versioning</em> |
| in the documentation bundle for your Java Standard Edition package, in |
| file <samp>guide/extensions/versioning.html</samp> or the |
| online <a href="https://docs.oracle.com/javase/8/docs/technotes/guides/versioning/spec/versioning2.html#wp90779" |
| target="_top">Package Versioning documentation.</a></p> |
| |
| <h3>Attributes</h3> |
| <p>The extension type supports the following attributes:</p> |
| |
| <table class="attr"> |
| <tr> |
| <th scope="col">Attribute</th> |
| <th scope="col">Description</th> |
| <th scope="col">Required</th> |
| </tr> |
| <tr> |
| <td>extensionName</td> |
| <td>The name of extension</td> |
| <td>yes</td> |
| </tr> |
| <tr> |
| <td>specificationVersion</td> |
| <td>The version of extension specification (must be in dewey decimal aka dotted decimal |
| notation, eg <q>3.2.4</q>)</td> |
| <td>no</td> |
| </tr> |
| <tr> |
| <td>specificationVendor</td> |
| <td>The specification vendor</td> |
| <td>no</td> |
| </tr> |
| <tr> |
| <td>implementationVersion</td> |
| <td>The version of extension implementation (must be in dewey decimal aka dotted decimal |
| notation, eg <q>3.2.4</q>)</td> |
| <td>no</td> |
| </tr> |
| <tr> |
| <td>implementationVendor</td> |
| <td>The implementation vendor</td> |
| <td>no</td> |
| </tr> |
| <tr> |
| <td>implementationVendorId</td> |
| <td>The implementation vendor ID</td> |
| <td>no</td> |
| </tr> |
| <tr> |
| <td>implementationURL</td> |
| <td>The url from which to retrieve extension.</td> |
| <td>no</td> |
| </tr> |
| <tr> |
| <td>refid</td> |
| <td>Makes this <code>extension</code> |
| a <a href="../using.html#references">reference</a> to |
| an <code>extension</code> defined elsewhere. If specified no other |
| attributes or nested elements are allowed.</td> |
| <td>No</td> |
| </tr> |
| </table> |
| |
| <h4>Examples</h4> |
| <pre> |
| <extension id="e1" |
| extensionName="MyExtensions" |
| specificationVersion="1.0" |
| specificationVendor="Peter Donald" |
| implementationVendorID="vv" |
| implementationVendor="Apache" |
| implementationVersion="2.0" |
| implementationURL="https://somewhere.com/myExt.jar"/> |
| </pre> |
| |
| <p>Fully specified extension object.</p> |
| |
| <pre> |
| <extension id="e1" |
| extensionName="MyExtensions" |
| specificationVersion="1.0" |
| specificationVendor="Peter Donald"/> |
| </pre> |
| |
| <p>Extension object that just specifies the specification details.</p> |
| |
| </body> |
| </html> |
