X-Git-Url: http://wamblee.org/gitweb/?a=blobdiff_plain;f=system%2Fgeneral%2Fsrc%2Fmain%2Fjava%2Forg%2Fwamblee%2Fsystem%2Fcore%2FRequiredInterface.java;h=b535628b3a24463724e7c049afa03b15dd5a4356;hb=8de36ff0206c996baf3ee4adc3e2293b12ff5f39;hp=0fea736057bbc32849ef977004a91520b7a3f2ff;hpb=4845c677310814de4c98e22aad483e49b9dfc594;p=utils

diff --git a/system/general/src/main/java/org/wamblee/system/core/RequiredInterface.java b/system/general/src/main/java/org/wamblee/system/core/RequiredInterface.java
index 0fea7360..b535628b 100644
--- a/system/general/src/main/java/org/wamblee/system/core/RequiredInterface.java
+++ b/system/general/src/main/java/org/wamblee/system/core/RequiredInterface.java
@@ -1,51 +1,62 @@
 /*
  * 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.core;
 
-public interface RequiredInterface {
+/**
+ * 
+ * @author $author$
+ * @version $Revision: 1.6 $
+ */
+public interface RequiredInterface extends NamedInterface {
+    /**
+     * 
+     * @return True iff the required interface is optional.
+     */
+    boolean isOptional();
+
+    /**
+     * Checks if the service is provided by a given provided interface.
+     * 
+     * @param aInterface
+     *            Provided interface.
+     * 
+     * @return
+     */
+    boolean implementedBy(ProvidedInterface aInterface);
+
+    /**
+     * Sets the provider of this interface.
+     * 
+     * @param aProvider
+     *            Provider.
+     */
+    void setProvider(ProvidedInterface aProvider);
+
+    /**
+     * Gets the provider interface.
+     * 
+     * @return Provider or null if not set.
+     */
+    ProvidedInterface getProvider();
 
-	/**
-	 * Name for the interface. 
-	 */
-	public String getName(); 
-	
-	/**
-	 * Checks if the service is provided by a given provided interface. 
-	 * @param aInterface Provided interface. 
-	 * @return
-	 */
-	boolean implementedBy(ProvidedInterface aInterface);
-	
-	/**
-	 * Sets the provider of this interface. 
-	 * @param aProvider Provider. 
-	 */
-	void setProvider(ProvidedInterface aProvider);
-	
-	/**
-	 * Getst the provider interface. 
-	 * @return Provider or null if not set. 
-	 */
-	ProvidedInterface getProvider(); 
-	
-	/**
-	 * Gets the implementation of the required interface. 
-	 * @param <T>
-	 * @param aClass Interface type. 
-	 * @return Interface implementation or null if not known yet. 
-	 */
-	<T> T getImplementation(Class<T> aClass); 
+    /**
+     * Determines if the requirements of the current interface are at least
+     * those of the given required interface.
+     * 
+     * 
+     */
+    boolean covers(RequiredInterface aInterface);
 }