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136 lines
4.8 KiB
HTML
136 lines
4.8 KiB
HTML
<!--
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<html>
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<head>
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<meta http-equiv="Content-Language" content="en-us">
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<link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
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<title>jarlib-available Task</title>
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</head>
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<body>
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<h2><a name="jarlib-available">jarlib-available</a></h2>
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<h3>Description</h3>
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<p>Check whether an extension is present in a fileset or an extensionSet.
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If the extension is present then a property is set.</p>
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<p>Note that this task
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works with extensions as defined by the "Optional Package" specification.
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For more information about optional packages, see the document
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<em>Optional Package Versioning</em> in the documentation bundle for your
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Java2 Standard Edition package, in file
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<code>guide/extensions/versioning.html</code> or online at
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<a href="http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html">
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http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html</a>.</p>
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<p>See the Extension and ExtensionSet documentation for further details</p>
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<h3>Parameters</h3>
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<table border="1" cellpadding="2" cellspacing="0">
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<tr>
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<td valign="top"><b>Attribute</b></td>
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<td valign="top"><b>Description</b></td>
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<td align="center" valign="top"><b>Required</b></td>
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</tr>
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<tr>
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<td valign="top">property</td>
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<td valign="top">The name of property to set if extensions is available.</td>
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<td valign="top" align="center">Yes</td>
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</tr>
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<tr>
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<td valign="top">file</td>
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<td valign="top">The file to check for extension</td>
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<td valign="top" align="center">No, one of file, nested
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ExtensionSet or nested fileset must be present.</td>
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</tr>
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</table>
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<h3>Parameters specified as nested elements</h3>
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<h4>extension</h4>
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<p><a href="../OptionalTypes/extension.html">Extension</a> the extension
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to search for.</p>
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<h4>fileset</h4>
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<p><a href="../CoreTypes/fileset.html">FileSet</a>s are used to select
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sets of files to check for extension.</p>
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<h4>extensionSet</h4>
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<p><a href="../OptionalTypes/extensionset.html">ExtensionSet</a>s is the set
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of extensions to search for extension in.</p>
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<h3>Examples</h3>
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<p><b>Search for extension in single file</b></p>
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<pre>
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<jarlib-available property="myext.present" file="myfile.jar">
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<extension
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extensionName="org.apache.tools.ant"
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specificationVersion="1.4.9"
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specificationVendor="Apache Software Foundation"/>
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</jarlib-available>
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</pre>
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<p><b>Search for extension in single file referencing external Extension</b></p>
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<pre>
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<extension id="myext"
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extensionName="org.apache.tools.ant"
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specificationVersion="1.4.9"
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specificationVendor="Apache Software Foundation"/>
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<jarlib-available property="myext.present" file="myfile.jar">
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<extension refid="myext"/>
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</jarlib-available>
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</pre>
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<p><b>Search for extension in fileset</b></p>
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<pre>
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<extension id="myext"
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extensionName="org.apache.tools.ant"
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specificationVersion="1.4.9"
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specificationVendor="Apache Software Foundation"/>
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<jarlib-available property="myext.present">
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<extension refid="myext"/>
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<fileset dir="lib">
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<include name="*.jar"/>
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</fileset>
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</jarlib-available>
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</pre>
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<p><b>Search for extension in extensionSet</b></p>
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<pre>
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<extension id="myext"
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extensionName="org.apache.tools.ant"
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specificationVersion="1.4.9"
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specificationVendor="Apache Software Foundation"/>
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<jarlib-available property="myext.present">
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<extension refid="myext"/>
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<extensionSet id="exts3">
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<libfileset
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includeUrl="false"
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includeImpl="true"
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dir="lib">
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<include name="*.jar"/>
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</libfileset>
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</extensionSet>
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</jarlib-available>
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</pre>
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</body>
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</html>
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