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-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-<html>
- <head>
- <title>Ant-contrib Tasks: PropertySelector</title>
- </head>
-
- <body>
- <h1>PropertySelector</h1>
-
- <p>Selects property names that match a given regular expression and
- returns them in a delimited list</p>
-
- <h2>Parameters</h2>
- <table border="1" cellpadding="2" cellspacing="0">
- <tr>
- <th>Attribute</th>
- <th>Description</th>
- <th>Required</th>
- </tr>
- <tr>
- <td valign="top">property</td>
- <td valign="top">The name of the property you wish to set.</td>
- <td align="center" valign="top">Yes.</td>
- </tr>
- <tr>
- <td valign="top">override</td>
- <td valign="top">If the property is already set, should we change it's value.
- Can be <code>true</code> or <code>false</code></td>
- <td align="center" valign="top">No. Defaults to <code>false</code></td>
- </tr>
- <tr>
- <td valign="top">match</td>
- <td valign="top">The regular expression which is used to select
- property names for inclusion in the list. This follows
- the standard regular expression syntax accepted by ant's
- regular expression tasks.</td>
- <td align="center" valign="top">Yes.</td>
- </tr>
- <tr>
- <td valign="top">select</td>
- <td valign="top">A pattern which indicates what selection pattern you want
- in the returned list. This used the substitution pattern
- syntax to indicate where to insert groupings created as a result
- of the regular expression match.</td>
- <td align="center" valign="top">No. default is &quot;\0&quot;.</td>
- </tr>
- <tr>
- <td valign="top">casesensitive</td>
- <td valign="top">Should the match be case sensitive</td>
- <td align="center" valign="top">No. default is &quot;true&quot;.</td>
- </tr>
- <tr>
- <td valign="top">delimiter</td>
- <td valign="top">The delimiter used to seperate entries in the resulting
- property</td>
- <td align="center" valign="top">No. default is &quot;,&quot;.</td>
- </tr>
- <tr>
- <td valign="top">distinct</td>
- <td valign="top">Should the returned entries be a distinct set (no duplicate
- entries)</td>
- <td align="center" valign="top">No. default is &quot;false&quot;.</td>
- </tr>
- </table>
-
- <h2>Select expressions</h2>
-
- Expressions are selected in a the same syntax as a regular expression
- substitution pattern.
-
- <ul type="o">
- <li><code>\0</code> indicates the entire property name (default).
- <li><code>\1</code> indicates the first grouping
- <li><code>\2</code> indicates the second grouping
- <li>etc...
- </ul>
-
- <h2>Example</h2>
-
- The following code
-
- <pre>
- <code>
- &lt;property name="package.ABC.name" value="abc pack name" /&gt;
- &lt;property name="package.DEF.name" value="def pack name" /&gt;
- &lt;property name="package.GHI.name" value="ghi pack name" /&gt;
- &lt;property name="package.JKL.name" value="jkl pack name" /&gt;
-
- &lt;propertyselector property="pack.list"
- delimiter=","
- match="package\.([^\.]*)\.name"
- select="\1"
- casesensitive="false" /&gt;
-
- </code>
- </pre>
-
- would yield the results
-
- <pre>
- <code>
- ABC,DEF,GHI,JKL
- </code>
- </pre>
-
- You could then iterate through this list using the <a href="foreach.html"
- >ForEach Task</a> as follows:
-
- <pre>
- <code>
- &lt;foreach list="${pack.list}"
- delimiter=","
- target="print.name"
- param="pack.id" /&gt;
-
- &lt;target name="print.name" &gt;
- &lt;propertycopy name="pack.name" value="package.${pack.id}.name" /&gt;
- &lt;echo message="${pack.name}" /&gt;
- &lt;/target&gt;
- </code>
- </pre>
-
- Would print
-
- <pre>
- <code>
- [echo] abc pack name
- [echo] def pack name
- [echo] ghi pack name
- [echo] jkl pack name
- </code>
- </pre>
-
- <hr>
- <p align="center">Copyright &copy; 2003 Ant-Contrib Project. All
- rights Reserved.</p>
-
- </body>
-</html>