INT-1156 initial commit for XPathTransformerParser and corresponding XSD updates

spring-integration-xml/src/main/java/org/springframework/integration/xml/config/IntegrationXmlNamespaceHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * 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.
@@ -20,6 +20,7 @@ import org.springframework.integration.config.xml.AbstractIntegrationNamespaceHa
 
 /**
  * @author Jonas Partner
+ * @author Mark Fisher
  */
 public class IntegrationXmlNamespaceHandler extends AbstractIntegrationNamespaceHandler {
 
@@ -27,6 +28,7 @@ public class IntegrationXmlNamespaceHandler extends AbstractIntegrationNamespace
 		registerBeanDefinitionParser("marshalling-transformer", new MarshallingTransformerParser());
 		registerBeanDefinitionParser("unmarshalling-transformer", new UnmarshallingTransformerParser());
 		registerBeanDefinitionParser("xslt-transformer", new XsltPayloadTransformerParser());
+		registerBeanDefinitionParser("xpath-transformer", new XPathTransformerParser());
 		registerBeanDefinitionParser("xpath-router", new XPathRouterParser());
 		registerBeanDefinitionParser("xpath-selector", new XPathSelectorParser());
 		registerBeanDefinitionParser("xpath-expression", new XPathExpressionParser());

spring-integration-xml/src/main/java/org/springframework/integration/xml/config/XPathTransformerParser.java

@@ -0,0 +1,49 @@
+/*
+ * 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 org.w3c.dom.Element;
+
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.xml.ParserContext;
+import org.springframework.integration.config.xml.AbstractTransformerParser;
+import org.springframework.integration.config.xml.IntegrationNamespaceUtils;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
+
+/**
+ * Parser for the 'xpath-transformer' element.
+ * 
+ * @author Mark Fisher
+ * @since 2.0
+ */
+public class XPathTransformerParser extends AbstractTransformerParser {
+
+	@Override
+	protected String getTransformerClassName() {
+		return "org.springframework.integration.xml.transformer.XPathTransformer";
+	}
+
+	@Override
+	protected void parseTransformer(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
+		String expression = element.getAttribute("expression");
+		Assert.isTrue(StringUtils.hasText(expression), "The 'expression' attribute is required.");
+		builder.addConstructorArgValue(expression);
+		IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "evaluation-type");
+	}
+
+}

spring-integration-xml/src/main/resources/org/springframework/integration/xml/config/spring-integration-xml-2.0.xsd

@@ -157,6 +157,43 @@
 		</xsd:complexType>
 	</xsd:element>
 
+	<xsd:element name="xpath-transformer">
+		<xsd:complexType>
+			<xsd:annotation>
+				<xsd:documentation>
+	Defines an XPath transformer.
+				</xsd:documentation>
+			</xsd:annotation>
+			<xsd:complexContent>
+				<xsd:extension base="inputOutputEndpoint">
+					<xsd:attribute name="expression" type="xsd:string" use="required">
+						<xsd:annotation>
+							<xsd:documentation>
+	The XPath expression to be evaluated against the input Message's payload.
+							</xsd:documentation>
+						</xsd:annotation>
+					</xsd:attribute>
+					<xsd:attribute name="evaluation-type" default="STRING_RESULT">
+						<xsd:annotation>
+							<xsd:documentation>
+	The result type expected from the XPath evaluation. This will be the payload type of the output Message.
+							</xsd:documentation>
+						</xsd:annotation>
+						<xsd:simpleType>
+							<xsd:restriction base="xsd:string">
+								<xsd:enumeration value="BOOLEAN_RESULT"/>
+								<xsd:enumeration value="NODE_RESULT"/>
+								<xsd:enumeration value="NODE_LIST_RESULT"/>
+								<xsd:enumeration value="NUMBER_RESULT"/>
+								<xsd:enumeration value="STRING_RESULT"/>
+							</xsd:restriction>
+						</xsd:simpleType>
+					</xsd:attribute>
+				</xsd:extension>
+			</xsd:complexContent>
+		</xsd:complexType>
+	</xsd:element>
+
 	<xsd:element name="xpath-router">
 		<xsd:complexType>
 			<xsd:annotation>