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| <html> |
| |
| <head> |
| <meta http-equiv="Content-Language" content="en-us"> |
| <link rel="stylesheet" type="text/css" href="../stylesheets/style.css"> |
| <title>jarlib-available Task</title> |
| </head> |
| |
| <body> |
| |
| <h2><a name="jarlib-available">jarlib-available</a></h2> |
| <h3>Description</h3> |
| <p>Check whether an extension is present in a fileset or an extensionSet. |
| If the extension is present then a property is set.</p> |
| |
| <p>Note that this task |
| 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 |
| Java2 Standard Edition package, in file |
| <code>guide/extensions/versioning.html</code> or online at |
| <a href="http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html"> |
| http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html</a>.</p> |
| <p>See the Extension and ExtensionSet documentation for further details</p> |
| |
| <h3>Parameters</h3> |
| <table border="1" cellpadding="2" cellspacing="0"> |
| <tr> |
| <td valign="top"><b>Attribute</b></td> |
| <td valign="top"><b>Description</b></td> |
| <td align="center" valign="top"><b>Required</b></td> |
| </tr> |
| <tr> |
| <td valign="top">property</td> |
| <td valign="top">The name of property to set if extensions is available.</td> |
| <td valign="top" align="center">Yes</td> |
| </tr> |
| <tr> |
| <td valign="top">file</td> |
| <td valign="top">The file to check for extension</td> |
| <td valign="top" align="center">No, one of file, nested |
| ExtensionSet or nested fileset must be present.</td> |
| </tr> |
| </table> |
| <h3>Parameters specified as nested elements</h3> |
| |
| <h4>extension</h4> |
| <p><a href="../OptionalTypes/extension.html">Extension</a> the extension |
| to search for.</p> |
| |
| <h4>fileset</h4> |
| <p><a href="../CoreTypes/fileset.html">FileSet</a>s are used to select |
| sets of files to check for extension.</p> |
| |
| <h4>extensionSet</h4> |
| <p><a href="../OptionalTypes/extensionset.html">ExtensionSet</a>s is the set |
| of extensions to search for extension in.</p> |
| |
| <h3>Examples</h3> |
| <p><b>Search for extension in single file</b></p> |
| <pre> |
| <jarlib-available property="myext.present" file="myfile.jar"> |
| <extension |
| extensionName="org.apache.tools.ant" |
| specificationVersion="1.4.9" |
| specificationVendor="Apache Software Foundation"/> |
| </jarlib-available> |
| </pre> |
| |
| <p><b>Search for extension in single file referencing external Extension</b></p> |
| <pre> |
| <extension id="myext" |
| extensionName="org.apache.tools.ant" |
| specificationVersion="1.4.9" |
| specificationVendor="Apache Software Foundation"/> |
| |
| <jarlib-available property="myext.present" file="myfile.jar"> |
| <extension refid="myext"/> |
| </jarlib-available> |
| </pre> |
| <p><b>Search for extension in fileset</b></p> |
| <pre> |
| <extension id="myext" |
| extensionName="org.apache.tools.ant" |
| specificationVersion="1.4.9" |
| specificationVendor="Apache Software Foundation"/> |
| |
| <jarlib-available property="myext.present"> |
| <extension refid="myext"/> |
| <fileset dir="lib"> |
| <include name="*.jar"/> |
| </fileset> |
| </jarlib-available> |
| </pre> |
| <p><b>Search for extension in extensionSet</b></p> |
| <pre> |
| <extension id="myext" |
| extensionName="org.apache.tools.ant" |
| specificationVersion="1.4.9" |
| specificationVendor="Apache Software Foundation"/> |
| |
| <jarlib-available property="myext.present"> |
| <extension refid="myext"/> |
| <extensionSet id="exts3"> |
| <libfileset |
| includeUrl="false" |
| includeImpl="true" |
| dir="lib"> |
| <include name="*.jar"/> |
| </libfileset> |
| </extensionSet> |
| </jarlib-available> |
| </pre> |
| |
| |
| |
| </body> |
| </html> |
| |
