Author: norman
Date: Tue May 4 00:07:47 2010
New Revision: 940679
URL: http://svn.apache.org/viewvc?rev=940679&view=rev
Log:
Add abstract implementation of ProtocolHandlerChain for simplify implementations
Added:
james/protocols/trunk/api/src/main/java/org/apache/james/protocols/api/AbstractProtocolHandlerChain.java
Added:
james/protocols/trunk/api/src/main/java/org/apache/james/protocols/api/AbstractProtocolHandlerChain.java
URL:
http://svn.apache.org/viewvc/james/protocols/trunk/api/src/main/java/org/apache/james/protocols/api/AbstractProtocolHandlerChain.java?rev=940679&view=auto
==============================================================================
---
james/protocols/trunk/api/src/main/java/org/apache/james/protocols/api/AbstractProtocolHandlerChain.java
(added)
+++
james/protocols/trunk/api/src/main/java/org/apache/james/protocols/api/AbstractProtocolHandlerChain.java
Tue May 4 00:07:47 2010
@@ -0,0 +1,77 @@
+/****************************************************************
+ * Licensed to the Apache Software Foundation (ASF) under one *
+ * or more contributor license agreements. See the NOTICE file *
+ * distributed with this work for additional information *
+ * regarding copyright ownership. The ASF licenses this file *
+ * to you 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.apache.james.protocols.api;
+
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * Abstract base class for {...@link ProtocolHandlerChain} implementations
+ *
+ *
+ */
+public abstract class AbstractProtocolHandlerChain implements
ProtocolHandlerChain{
+
+ /**
+ * Return a List of all Handlers
+ *
+ * @return handlerList
+ */
+ protected abstract List<Object> getHandlers();
+
+ /*
+ * (non-Javadoc)
+ * @see
org.apache.james.protocols.api.ProtocolHandlerChain#getHandlers(java.lang.Class)
+ */
+ @SuppressWarnings("unchecked")
+ public <T> LinkedList<T> getHandlers(Class<T> type) {
+ LinkedList<T> result = new LinkedList<T>();
+ List<Object> handlers = getHandlers();
+ for (Iterator<?> i = handlers.iterator(); i.hasNext(); ) {
+ Object handler = i.next();
+ if (type.isInstance(handler)) {
+ result.add((T)handler);
+ }
+ }
+ return result;
+ }
+
+ /**
+ * ExtensibleHandler wiring. This should get called after the class was
constructed
+ * and every stuff was set
+ *
+ * @throws WiringException
+ */
+ public final void wireExtensibleHandlers() throws WiringException {
+ List<Object> handlers = getHandlers();
+ for (Iterator<?> h = handlers.iterator(); h.hasNext(); ) {
+ Object handler = h.next();
+ if (handler instanceof ExtensibleHandler) {
+ final ExtensibleHandler extensibleHandler =
(ExtensibleHandler) handler;
+ final List<Class<?>> markerInterfaces =
extensibleHandler.getMarkerInterfaces();
+ for (int i= 0;i < markerInterfaces.size(); i++) {
+ final Class<?> markerInterface = markerInterfaces.get(i);
+ final List<?> extensions = getHandlers(markerInterface);
+
extensibleHandler.wireExtensions(markerInterface,extensions);
+ }
+ }
+ }
+ }
+}
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