Added namespace support for the <transformer/> element (INT-342).

org.springframework.integration/src/main/java/org/springframework/integration/config/IntegrationNamespaceHandler.java

@@ -38,6 +38,7 @@ public class IntegrationNamespaceHandler extends NamespaceHandlerSupport {
 		registerBeanDefinitionParser("channel-adapter", new ChannelAdapterParser());
 		registerBeanDefinitionParser("gateway", new GatewayParser());
 		registerBeanDefinitionParser("selector-chain", new SelectorChainParser());
+		registerBeanDefinitionParser("transformer", new TransformerParser());
 		registerBeanDefinitionParser("router", new RouterParser());
 		registerBeanDefinitionParser("splitter", new SplitterParser());
 		registerBeanDefinitionParser("aggregator", new AggregatorParser());

org.springframework.integration/src/main/java/org/springframework/integration/config/TransformerParser.java

@@ -0,0 +1,40 @@
+/*
+ * 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.config;
+
+import org.springframework.integration.endpoint.MessageEndpoint;
+import org.springframework.integration.transformer.MethodInvokingTransformer;
+import org.springframework.integration.transformer.TransformerEndpoint;
+
+/**
+ * Parser for the <transformer/> element.
+ * 
+ * @author Mark Fisher
+ */
+public class TransformerParser extends AbstractEndpointParser {
+
+	@Override
+	protected Class<? extends MessageEndpoint> getEndpointClass() {
+		return TransformerEndpoint.class;
+	}
+
+	@Override
+	protected Class<?> getMethodInvokingAdapterClass() {
+		return MethodInvokingTransformer.class;
+	}
+
+}

org.springframework.integration/src/main/java/org/springframework/integration/config/spring-integration-1.0.xsd

@@ -305,6 +305,14 @@
 		</xsd:complexType>
 	</xsd:element>
 
+	<xsd:element name="transformer" type="inputOutputEndpointType">
+		<xsd:annotation>
+			<xsd:documentation>
+	Defines a Transformer.
+			</xsd:documentation>
+		</xsd:annotation>
+	</xsd:element>
+
 	<xsd:element name="router">
 		<xsd:annotation>
 			<xsd:documentation>

org.springframework.integration/src/test/java/org/springframework/integration/transformer/TestBean.java

@@ -0,0 +1,28 @@
+/*
+ * 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.transformer;
+
+/**
+ * @author Mark Fisher
+ */
+public class TestBean {
+
+	public String upperCase(String input) {
+		return input.toUpperCase();
+	}
+
+}

org.springframework.integration/src/test/java/org/springframework/integration/transformer/TransformerContextTests.java

@@ -0,0 +1,46 @@
+/*
+ * 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.transformer;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+import org.springframework.integration.channel.MessageChannel;
+import org.springframework.integration.channel.PollableChannel;
+import org.springframework.integration.message.Message;
+import org.springframework.integration.message.StringMessage;
+
+/**
+ * @author Mark Fisher
+ */
+public class TransformerContextTests {
+
+	@Test
+	public void methodInvokingTransformer() {
+		ApplicationContext context = new ClassPathXmlApplicationContext(
+				"transformerContextTests.xml", this.getClass());
+		MessageChannel input = (MessageChannel) context.getBean("input");
+		PollableChannel output = (PollableChannel) context.getBean("output");
+		input.send(new StringMessage("foo"));
+		Message<?> reply = output.receive(0);
+		assertEquals("FOO", reply.getPayload());
+	}
+
+}

org.springframework.integration/src/test/java/org/springframework/integration/transformer/transformerContextTests.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans:beans xmlns="http://www.springframework.org/schema/integration"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:beans="http://www.springframework.org/schema/beans"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans
+			http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
+			http://www.springframework.org/schema/integration
+			http://www.springframework.org/schema/integration/spring-integration-1.0.xsd">
+
+	<message-bus/>
+
+	<channel id="input"/>
+
+	<channel id="output">
+		<queue capacity="50"/>
+	</channel>
+
+	<transformer input-channel="input" ref="testBean" method="upperCase" output-channel="output"/>
+
+	<beans:bean id="testBean" class="org.springframework.integration.transformer.TestBean"/>
+
+</beans:beans>