Implemented PayloadTypeRouter and added PayloadTypeRouterTests.

spring-integration-core/src/main/java/org/springframework/integration/router/PayloadTypeRouter.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2002-2007 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.springframework.integration.router;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.springframework.integration.channel.MessageChannel;
+import org.springframework.integration.message.Message;
+import org.springframework.util.Assert;
+
+/**
+ * A router implementation that resolves the {@link MessageChannel} based on the
+ * {@link Message Message's} payload type.
+ * 
+ * @author Mark Fisher
+ */
+public class PayloadTypeRouter extends SingleChannelRouter {
+
+	private Map<Class<?>, MessageChannel> channelMappings = new ConcurrentHashMap<Class<?>, MessageChannel>();
+
+	private MessageChannel defaultChannel;
+
+
+	public PayloadTypeRouter() {
+		this.setChannelResolver(new PayloadTypeChannelResolver());
+	}
+
+
+	public void setChannelMappings(Map<Class<?>, MessageChannel> channelMappings) {
+		Assert.notNull(channelMappings, "'channelMappings' must not be null");
+		this.channelMappings = channelMappings;
+	}
+
+	public void setDefaultChannel(MessageChannel defaultChannel) {
+		this.defaultChannel = defaultChannel;
+	}
+
+
+	private class PayloadTypeChannelResolver implements ChannelResolver {
+
+		public MessageChannel resolve(Message<?> message) {
+			MessageChannel channel = channelMappings.get(message.getPayload().getClass());
+			return channel != null ? channel : defaultChannel;
+		}
+	}
+
+}