add toString implementation

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@290807 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -53,7 +53,6 @@ outer:      for (Iterator ri = w.getResourceCollection().iterator(); ri.hasNext(
             }
             return result;
         }
-
     };
 
     /**
@@ -131,4 +130,16 @@ outer:      for (Iterator ri = w.getResourceCollection().iterator(); ri.hasNext(
         return w.isFilesystemOnly();
     }
 
+    /**
+     * Format this Restrict collection as a String.
+     * @return the String value of this collection.
+     */
+    public synchronized String toString() {
+        if (isReference()) {
+            return getCheckedRef().toString();
+        }
+        dieOnCircularReference();
+        return w.toString();
+    }
+
 }