Added StaticHandlerMethodResolver.

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

@@ -0,0 +1,50 @@
+/*
+ * 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 java.lang.reflect.Method;
+
+import org.springframework.integration.core.Message;
+import org.springframework.util.Assert;
+
+/**
+ * An implementation of {@link HandlerMethodResolver} that always returns the
+ * same Method instance. Used when the exact Method is indicated explicitly
+ * or otherwise resolvable in advance based on static metadata.
+ * 
+ * @author Mark Fisher
+ */
+public class StaticHandlerMethodResolver implements HandlerMethodResolver {
+
+	private final Method method;
+
+
+	public StaticHandlerMethodResolver(Method method) {
+		Assert.notNull(method, "method must not be null");
+		Assert.notEmpty(method.getParameterTypes(),
+				"Message-handling method [" + method + "] must accept at least one parameter.");
+		Assert.isTrue(HandlerMethodUtils.isValidHandlerMethod(method),
+				"Invalid Message-handling method [" + method + "]");
+		this.method = method;
+	}
+
+
+	public Method resolveHandlerMethod(Message<?> message) {
+		return this.method;
+	}
+
+}