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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>Condition Task</title> |
| </head> |
| |
| <body> |
| |
| <h2><a name="Condition">Condition</a></h2> |
| <h3>Description</h3> |
| <p>Sets a property if a certain condition holds true - this is a |
| generalization of <a href="available.html">Available</a> and <a |
| href="uptodate.html">Uptodate</a>.</p> |
| <p>If the condition holds true, the property value is set to true by |
| default; otherwise, the property is not set. You can set the value to |
| something other than the default by specifying the <code>value</code> |
| attribute.</p> |
| <p>Conditions are specified as <a href="#nested">nested elements</a>, |
| you must specify exactly one condition.</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 the property to set.</td> |
| <td valign="top" align="center">Yes</td> |
| </tr> |
| <tr> |
| <td valign="top">value</td> |
| <td valign="top">The value to set the property to. Defaults to |
| "true".</td> |
| <td valign="top" align="center">No</td> |
| </tr> |
| <tr> |
| <td valign="top">else</td> |
| <td valign="top">The value to set the property to if the condition |
| evaluates to <i>false</i>. By default the property will remain unset. |
| <em>Since Apache Ant 1.6.3</em> |
| </td> |
| <td valign="top" align="center">No</td> |
| </tr> |
| </table> |
| <h3><a name="nested">Parameters specified as nested elements</a></h3> |
| <p>All conditions to test are specified as nested elements, for a |
| complete list see <a href="conditions.html">here</a>.</p> |
| |
| <h3>Examples</h3> |
| <pre> |
| <condition property="javamail.complete"> |
| <and> |
| <available classname="javax.activation.DataHandler"/> |
| <available classname="javax.mail.Transport"/> |
| </and> |
| </condition> |
| </pre> |
| <p>sets the property <code>javamail.complete</code> if both the |
| JavaBeans Activation Framework and JavaMail are available in the |
| classpath.</p> |
| |
| <pre> |
| <condition property="isMacOsButNotMacOsX"> |
| <and> |
| <os family="mac"/> |
| |
| <not> |
| <os family="unix"/> |
| |
| </not> |
| </and> |
| </condition> |
| </pre> |
| <p>sets the property <code>isMacOsButNotMacOsX</code> if the current |
| operating system is MacOS, but not MacOS X - which Ant considers to be |
| in the Unix family as well.</p> |
| |
| <pre> |
| <condition property="isSunOSonSparc"> |
| <os name="SunOS" arch="sparc"/> |
| |
| </condition> |
| </pre> |
| <p>sets the property <code>isSunOSonSparc</code> if the current |
| operating system is SunOS and if it is running on a sparc architecture.</p> |
| |
| |
| |
| </body> |
| </html> |
