INT-1156 initial commit for XPathTransformerParser and corresponding XSD updates

spring-integration-xml/src/test/java/org/springframework/integration/xml/config/XPathTransformerParserTests-context.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans:beans xmlns="http://www.springframework.org/schema/integration/xml"
+	xmlns:beans="http://www.springframework.org/schema/beans"
+	xmlns:si="http://www.springframework.org/schema/integration"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://www.springframework.org/schema/beans
+			http://www.springframework.org/schema/beans/spring-beans.xsd
+			http://www.springframework.org/schema/integration
+			http://www.springframework.org/schema/integration/spring-integration.xsd
+			http://www.springframework.org/schema/integration/xml
+			http://www.springframework.org/schema/integration/xml/spring-integration-xml.xsd">
+
+	<si:channel id="output">
+		<si:queue/>
+	</si:channel>
+
+	<xpath-transformer input-channel="defaultInput" expression="/person/@name" output-channel="output"/>
+
+	<xpath-transformer input-channel="numberInput" expression="/person/@age" evaluation-type="NUMBER_RESULT" output-channel="output"/>
+
+	<xpath-transformer input-channel="booleanInput" expression="/person/@married = 'true'" evaluation-type="BOOLEAN_RESULT" output-channel="output"/>
+
+	<xpath-transformer input-channel="nodeInput" expression="/person/@age" evaluation-type="NODE_RESULT" output-channel="output"/>
+
+	<xpath-transformer input-channel="nodeListInput" expression="/person/@*" evaluation-type="NODE_LIST_RESULT" output-channel="output"/>
+
+</beans:beans>

spring-integration-xml/src/test/java/org/springframework/integration/xml/config/XPathTransformerParserTests.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright 2002-2010 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.xml.config;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.List;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.w3c.dom.Node;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.integration.channel.PollableChannel;
+import org.springframework.integration.core.Message;
+import org.springframework.integration.core.MessageChannel;
+import org.springframework.integration.message.MessageBuilder;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+/**
+ * @author Mark Fisher
+ * @since 2.0
+ */
+@ContextConfiguration
+@RunWith(SpringJUnit4ClassRunner.class)
+public class XPathTransformerParserTests {
+
+	@Autowired
+	private MessageChannel defaultInput;
+
+	@Autowired
+	private MessageChannel numberInput;
+
+	@Autowired
+	private MessageChannel booleanInput;
+
+	@Autowired
+	private MessageChannel nodeInput;
+
+	@Autowired
+	private MessageChannel nodeListInput;
+
+	@Autowired
+	private PollableChannel output;
+
+	private final Message<?> message = MessageBuilder.withPayload("<person name='John Doe' age='42' married='true'/>").build();
+
+
+	@Test
+	public void stringResultByDefault() {
+		this.defaultInput.send(message);
+		assertEquals("John Doe", output.receive(0).getPayload());
+	}
+
+	@Test
+	public void numberResult() {
+		this.numberInput.send(message);
+		assertEquals(new Double(42), output.receive(0).getPayload());
+	}
+
+	@Test
+	public void booleanResult() {
+		this.booleanInput.send(message);
+		assertEquals(Boolean.TRUE, output.receive(0).getPayload());
+	}
+
+	@Test
+	public void nodeResult() {
+		this.nodeInput.send(message);
+		Object payload = output.receive(0).getPayload();
+		assertTrue(payload instanceof Node);
+		Node node = (Node) payload;
+		assertEquals("42", node.getTextContent());
+	}
+
+	@Test
+	@SuppressWarnings("unchecked")
+	public void nodeListResult() {
+		this.nodeListInput.send(message);
+		Object payload = output.receive(0).getPayload();
+		assertTrue(List.class.isAssignableFrom(payload.getClass()));
+		List<Node> nodeList = (List<Node>) payload;
+		assertEquals(3, nodeList.size());
+	}
+
+}