Removed MessageHandlerDecorator (the target object of any Method-invoking adapter can now use standard AOP).

org.springframework.integration/src/main/java/org/springframework/integration/handler/MessageHandlerDecorator.java

@@ -1,65 +0,0 @@
-/*
- * Copyright 2002-2008 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.springframework.integration.handler;
-
-import org.springframework.integration.message.Message;
-import org.springframework.integration.message.MessageHandlingException;
-import org.springframework.util.Assert;
-
-/**
- * A message handler implementation that intercepts calls to another handler.
- * 
- * @author Mark Fisher
- */
-public abstract class MessageHandlerDecorator implements MessageHandler {
-
-	private MessageHandler handler;
-
-
-	public MessageHandlerDecorator(MessageHandler handler) {
-		Assert.notNull(handler, "handler must not be null");
-		this.handler = handler;
-	}
-
-	public MessageHandlerDecorator() {
-	}
-
-
-	public void setHandler(MessageHandler handler) {
-		Assert.notNull(handler, "handler must not be null");
-		this.handler = handler;
-	}
-
-	public final Message<?> handle(Message<?> message) {
-		if (this.handler == null) {
-			throw new MessageHandlingException(message,
-					"MessageHandlerDecorator's handler must not be null");
-		}
-		return this.handleInternal(message, this.handler);
-	}
-
-
-	/**
-	 * The handler method for subclasses to implement.
-	 * 
-	 * @param message the message to handle
-	 * @param handler the intercepted handler
-	 * @return a reply message or null
-	 */
-	public abstract Message<?> handleInternal(Message<?> message, MessageHandler handler);
-
-}