| <html> |
| |
| <head> |
| <meta http-equiv="Content-Language" content="en-us"> |
| <title>Uptodate Task</title> |
| </head> |
| |
| <body> |
| |
| <h2><a name="uptodate">Uptodate</a></h2> |
| <h3>Description</h3> |
| <p>Sets a property if a target files are more up to date than a set of |
| Source files. Source files are specified by nested <srcfiles> |
| elements, these are <a href="../CoreTypes/fileset.html">FileSet</a>s, while target |
| files are specified using a nested <a href="../CoreTypes/mapper.html">mapper</a> |
| element.</p> |
| <p>The value part of the property being set is <i>true</i> if the |
| timestamp of the target files is more recent than the timestamp of |
| every corresponding source file.</p> |
| <p>The default behavior is to use a <a href="../CoreTypes/mapper.html#merge-mapper">merge |
| mapper</a> with the <code>to</code> attribute set to the value of the |
| targetfile attribute.</p> |
| <p>Normally, this task is used to set properties that are useful to avoid target |
| execution depending on the relative age of the specified files.</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">targetfile</td> |
| <td valign="top">the file for which we want to determine the status.</td> |
| <td valign="top" align="center">Yes, unless a nested mapper element is |
| present.</td> |
| </tr> |
| </table> |
| <h3>Examples</h3> |
| <pre> <uptodate property="xmlBuild.notRequired" targetfile="${deploy}\xmlClasses.jar" > |
| <srcfiles dir= "${src}/xml" includes="**/*.dtd"/> |
| </uptodate></pre> |
| <p>sets the property <code><i>xmlBuild.notRequired</i></code> to the value "true" |
| if the <i>${deploy}/xmlClasses.jar</i> is more up to date than any of the DTD files in the <i>${src}/xml</i> directory.</p> |
| <p>This can be written as</p> |
| <pre> <uptodate property="xmlBuild.notRequired" > |
| <srcfiles dir= "${src}/xml" includes="**/*.dtd"/> |
| <mapper type="merge" to="${deploy}\xmlClasses.jar"/> |
| </uptodate></pre> |
| <p>as well.</p> |
| <hr> |
| <p align="center">Copyright © 2001 Apache Software Foundation. All rights |
| Reserved.</p> |
| |
| </body> |
| </html> |
| |
