svn commit: r718204 - /ant/core/trunk/src/main/org/apache/tools/ant/types/Resource.java

[bo...@apache.org]

Author: bodewig
Date: Mon Nov 17 01:12:53 2008
New Revision: 718204

URL: http://svn.apache.org/viewvc?rev=718204&view=rev
Log:
add an "as" method to Resource that allows extensions without actually implementing additional interfaces

Modified:
    ant/core/trunk/src/main/org/apache/tools/ant/types/Resource.java

Modified: ant/core/trunk/src/main/org/apache/tools/ant/types/Resource.java
URL: http://svn.apache.org/viewvc/ant/core/trunk/src/main/org/apache/tools/ant/types/Resource.java?rev=718204&r1=718203&r2=718204&view=diff
==============================================================================
--- ant/core/trunk/src/main/org/apache/tools/ant/types/Resource.java (original)
+++ ant/core/trunk/src/main/org/apache/tools/ant/types/Resource.java Mon Nov 17 01:12:53 2008
@@ -423,4 +423,20 @@
         super.setRefid(r);
     }
 
+    /**
+     * Returns a view of this resource that implements the interface
+     * given as the argument or null if there is no such view.
+     *
+     * <p>This allows extension interfaces to be added to resources
+     * without growing the number of permutations of interfaces
+     * decorators/adapters need to implement.</p>
+     *
+     * <p>This implementation of the method will return the current
+     * instance itself if it can be assigned to the given class.</p>
+     *
+     * @since ant 1.8.0
+     */
+    public Object as(Class clazz) {
+        return clazz.isAssignableFrom(getClass()) ? this : null;
+    }
 }