X-Git-Url: http://wamblee.org/gitweb/?a=blobdiff_plain;f=system%2Fgeneral%2Fsrc%2Fmain%2Fjava%2Forg%2Fwamblee%2Fsystem%2FDefaultRequiredInterface.java;h=b0227ee006ad8d843ab595e782ee3a329d382be1;hb=7526813969742844aefbd25e8a4a056985dc7f65;hp=2f06247d3b2883c55f3cebcf5fabc8325d6dfdbc;hpb=6110f13b29c47ba0fe8039194ee2c4a992911e3b;p=utils

diff --git a/system/general/src/main/java/org/wamblee/system/DefaultRequiredInterface.java b/system/general/src/main/java/org/wamblee/system/DefaultRequiredInterface.java
index 2f06247d..b0227ee0 100644
--- a/system/general/src/main/java/org/wamblee/system/DefaultRequiredInterface.java
+++ b/system/general/src/main/java/org/wamblee/system/DefaultRequiredInterface.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2007 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */ 
 package org.wamblee.system;
 
 import java.util.Arrays;
@@ -64,6 +79,9 @@ public class DefaultRequiredInterface implements RequiredInterface {
 
 	@Override
 	public <T> T getImplementation(Class<T> aClass) {
+		if ( _provider == null ) { 
+			return null; 
+		}
 		return (T)_provider.getImplementation();
 	}