added the size() method

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@15946 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/util/CopyOnWriteList.java

@@ -147,6 +147,10 @@ public class CopyOnWriteList<E> implements Iterable<E> {
         return core.isEmpty();
     }
 
+    public int size() {
+        return core.size();
+    }
+
     /**
      * {@link Converter} implementation for XStream.
      */

core/src/main/java/hudson/util/DescribableList.java

@@ -120,6 +120,10 @@ public class DescribableList<T extends Describable<T>, D extends Descriptor<T>>
         return get(d)!=null;
     }
 
+    public int size() {
+        return data.size();
+    }
+
     /**
      * Removes an instance by its type.
      */