Support cache attribute for <restrict>; delegate to component BaseRCWrapper.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@278496 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTypes/resources.html

@@ -324,6 +324,19 @@ platforms.
 <h4><a name="restrict">restrict</a></h4>
 <p>Restricts another nested resource collection using resource selectors:
 <blockquote>
+  <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">cache</td>
+      <td valign="top">Whether to cache results; disabling
+        may seriously impact performance</td>
+      <td valign="top" align="center">No, default <i>true</i></td>
+    </tr>
+  </table>
   <h4>Parameters specified as nested elements</h4>
   <p>A single resource collection is required.</p>
   <p>Nested resource selectors are used to "narrow down" the included

src/main/org/apache/tools/ant/types/resources/Restrict.java

@@ -67,6 +67,22 @@ outer:      for (Iterator ri = w.getResourceCollection().iterator(); ri.hasNext(
         w.add(c);
     }
 
+    /**
+     * Set whether to cache collections.
+     * @param b boolean cache flag.
+     */
+    public synchronized void setCache(boolean b) {
+        w.setCache(b);
+    }
+
+    /**
+     * Learn whether to cache collections. Default is <code>true</code>.
+     * @return boolean cache flag.
+     */
+    public synchronized boolean isCache() {
+        return w.isCache();
+    }
+
     /**
      * Add a ResourceSelector.
      * @param s the ResourceSelector to add.