allow path components to be directly added to AntClassLoader

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@490081 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/AntClassLoader.java

@@ -460,6 +460,20 @@ public class AntClassLoader extends ClassLoader implements SubBuildListener {
         }
     }
 
+    /**
+     * Add a path component.
+     * This simply adds the file, unlike addPathElement
+     * it does not open jar files and load files from
+     * their CLASSPATH entry in the manifest file.
+     * @param file the jar file or directory to add.
+     */
+    public void addPathComponent(File file) {
+        if (pathComponents.contains(file)) {
+            return;
+        }
+        pathComponents.addElement(file);
+    }
+
     /**
      * Add a file to the path.
      * Reads the manifest, if available, and adds any additional class path jars