Added MethodInvokingSource.

spring-integration-core/src/main/java/org/springframework/integration/adapter/MethodInvokingSource.java

@@ -0,0 +1,76 @@
+/*
+ * 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.adapter;
+
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.Collection;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.integration.MessagingConfigurationException;
+import org.springframework.integration.endpoint.MethodValidator;
+import org.springframework.integration.endpoint.SimpleMethodInvoker;
+import org.springframework.util.Assert;
+
+/**
+ * A pollable source that invokes a no-argument method so that its return value
+ * may be sent to a channel.
+ * 
+ * @author Mark Fisher
+ */
+public class MethodInvokingSource<T> implements PollableSource<Object>, InitializingBean {
+
+	private T object;
+
+	private String method;
+
+	private SimpleMethodInvoker<T> invoker;
+
+
+	public void setObject(T object) {
+		Assert.notNull(object, "'object' must not be null");
+		this.object = object;
+	}
+
+	public void setMethod(String method) {
+		Assert.notNull(method, "'method' must not be null");
+		this.method = method;
+	}
+
+	public void afterPropertiesSet() {
+		this.invoker = new SimpleMethodInvoker<T>(this.object, this.method);
+		this.invoker.setMethodValidator(new MessageReceivingMethodValidator());
+	}
+
+	public Collection<Object> poll(int limit) {
+		if (this.invoker == null) {
+			this.afterPropertiesSet();
+		}
+		return Arrays.asList(this.invoker.invokeMethod(new Object[] {}));
+	}
+
+
+	private static class MessageReceivingMethodValidator implements MethodValidator {
+
+		public void validate(Method method) {
+			if (method.getReturnType().equals(void.class)) {
+				throw new MessagingConfigurationException("MethodInvokingSource requires a non-void returning method.");
+			}
+		}
+	}
+
+}

spring-integration-core/src/main/java/org/springframework/integration/endpoint/SimpleMethodInvoker.java

@@ -55,6 +55,7 @@ public class SimpleMethodInvoker<T> {
 			methodInvoker.setTargetMethod(this.method);
 			methodInvoker.setArguments(args);
 			methodInvoker.prepare();
+			methodInvoker.getPreparedMethod().setAccessible(true);
 			if (this.methodValidator != null) {
 				this.methodValidator.validate(methodInvoker.getPreparedMethod());
 			}