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| 3 | <head>
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| 4 | <meta http-equiv="Content-Language" content="en-us">
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| 5 | <title>jarlib-available Task</title>
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| 6 | <link rel="stylesheet" type="text/css" href="../stylesheets/antmanual.css">
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| 7 | </head>
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| 8 |
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| 9 | <body>
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| 10 |
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| 11 | <h2><a name="jarlib-available">jarlib-available</a></h2>
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| 12 | <h3>Description</h3>
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| 13 | <p>Check whether an extension is present in a fileset or an extensionSet.
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| 14 | If the extension is present then a property is set.</p>
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| 15 |
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| 16 | <p>Note that this task
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| 17 | works with extensions as defined by the "Optional Package" specification.
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| 18 | For more information about optional packages, see the document
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| 19 | <em>Optional Package Versioning</em> in the documentation bundle for your
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| 20 | Java2 Standard Edition package, in file
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| 21 | <code>guide/extensions/versioning.html</code> or online at
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| 22 | <a href="http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html">
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| 23 | http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html</a>.</p>
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| 24 | <p>See the Extension and ExtensionSet documentation for further details</p>
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| 25 |
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| 26 | <h3>Parameters</h3>
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| 27 | <table border="1" cellpadding="2" cellspacing="0">
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| 28 | <tr>
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| 29 | <td valign="top"><b>Attribute</b></td>
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| 30 | <td valign="top"><b>Description</b></td>
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| 31 | <td align="center" valign="top"><b>Required</b></td>
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| 32 | </tr>
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| 33 | <tr>
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| 34 | <td valign="top">property</td>
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| 35 | <td valign="top">The name of property to set if extensions is available.</td>
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| 36 | <td valign="top" align="center">Yes</td>
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| 37 | </tr>
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| 38 | <tr>
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| 39 | <td valign="top">file</td>
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| 40 | <td valign="top">The file to check for extension</td>
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| 41 | <td valign="top" align="center">No, one of file, nested
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| 42 | ExtensionSet or nested fileset must be present.</td>
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| 43 | </tr>
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| 44 | </table>
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| 45 | <h3>Parameters specified as nested elements</h3>
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| 46 |
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| 47 | <h4>extension</h4>
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| 48 | <p><a href="../OptionalTypes/extension.html">Extension</a> the extension
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| 49 | to search for.</p>
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| 50 |
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| 51 | <h4>fileset</h4>
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| 52 | <p><a href="../CoreTypes/fileset.html">FileSet</a>s are used to select
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| 53 | sets of files to check for extension.</p>
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| 54 |
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| 55 | <h4>extensionSet</h4>
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| 56 | <p><a href="../OptionalTypes/extensionset.html">ExtensionSet</a>s is the set
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| 57 | of extensions to search for extension in.</p>
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| 58 |
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| 59 | <h3>Examples</h3>
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| 60 | <p><b>Search for extension in single file</b></p>
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| 61 | <pre>
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| 62 | <jarlib-available property="myext.present" file="myfile.jar">
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| 63 | <extension
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| 64 | extensionName="org.apache.tools.ant"
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| 65 | specificationVersion="1.4.9"
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| 66 | specificationVendor="Apache Software Foundation"/>
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| 67 | </jarlib-available>
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| 68 | </pre>
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| 69 |
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| 70 | <p><b>Search for extension in single file refencing external Extension</b></p>
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| 71 | <pre>
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| 72 | <extension id="myext"
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| 73 | extensionName="org.apache.tools.ant"
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| 74 | specificationVersion="1.4.9"
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| 75 | specificationVendor="Apache Software Foundation"/>
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| 76 |
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| 77 | <jarlib-available property="myext.present" file="myfile.jar">
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| 78 | <extension refid="myext"/>
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| 79 | </jarlib-available>
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| 80 | </pre>
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| 81 | <p><b>Search for extension in fileset</b></p>
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| 82 | <pre>
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| 83 | <extension id="myext"
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| 84 | extensionName="org.apache.tools.ant"
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| 85 | specificationVersion="1.4.9"
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| 86 | specificationVendor="Apache Software Foundation"/>
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| 87 |
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| 88 | <jarlib-available property="myext.present">
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| 89 | <extension refid="myext"/>
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| 90 | <fileset dir="lib">
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| 91 | <include name="*.jar"/>
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| 92 | </fileset>
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| 93 | </jarlib-available>
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| 94 | </pre>
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| 95 | <p><b>Search for extension in extensionSet</b></p>
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| 96 | <pre>
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| 97 | <extension id="myext"
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| 98 | extensionName="org.apache.tools.ant"
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| 99 | specificationVersion="1.4.9"
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| 100 | specificationVendor="Apache Software Foundation"/>
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| 101 |
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| 102 | <jarlib-available property="myext.present">
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| 103 | <extension refid="myext"/>
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| 104 | <extensionSet id="exts3">
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| 105 | <libfileset
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| 106 | includeUrl="false"
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| 107 | includeImpl="true"
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| 108 | dir="lib">
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| 109 | <include name="*.jar"/>
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| 110 | </libfileset>
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| 111 | </extensionSet>
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| 112 | </jarlib-available>
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| 113 | </pre>
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| 114 |
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| 115 | <hr><p align="center">Copyright © 2002,2004 The Apache Software Foundation.
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| 116 | All rights Reserved.</p>
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| 117 |
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| 118 | </body>
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| 119 | </html>
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| 120 |
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