DATAMONGO-36 - added option in Mongo XML namespace for enabling validation

Author: Maciej Walkowiak

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MongoNamespaceHandler.java

@@ -37,5 +37,6 @@ public void init() {
 		registerBeanDefinitionParser("mongo", new MongoParser());
 		registerBeanDefinitionParser("db-factory", new MongoDbFactoryParser());
 		registerBeanDefinitionParser("jmx", new MongoJmxParser());
+		registerBeanDefinitionParser("validation-enabled", new MongoValidationParser());
 	}
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MongoValidationParser.java

@@ -0,0 +1,55 @@
+package org.springframework.data.mongodb.config;
+
+import org.springframework.beans.factory.BeanDefinitionStoreException;
+import org.springframework.beans.factory.config.BeanDefinition;
+import org.springframework.beans.factory.config.RuntimeBeanReference;
+import org.springframework.beans.factory.parsing.BeanComponentDefinition;
+import org.springframework.beans.factory.support.AbstractBeanDefinition;
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.support.RootBeanDefinition;
+import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
+import org.springframework.beans.factory.xml.ParserContext;
+import org.springframework.data.mongodb.core.mapping.event.BeforeSaveValidator;
+import org.springframework.scheduling.config.AnnotationDrivenBeanDefinitionParser;
+import org.springframework.util.ClassUtils;
+import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
+import org.w3c.dom.Element;
+
+public class MongoValidationParser extends AbstractBeanDefinitionParser {
+	private static final boolean jsr303Present = ClassUtils.isPresent("javax.validation.Validator", AnnotationDrivenBeanDefinitionParser.class.getClassLoader());
+
+	@Override
+	protected String resolveId(Element element, AbstractBeanDefinition definition, ParserContext parserContext) throws BeanDefinitionStoreException {
+		return "beforeSaveValidator";
+	}
+
+	@Override
+	protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
+		BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition();
+
+		RuntimeBeanReference validator = getValidator(builder, parserContext);
+
+		if (validator == null) {
+			return null;
+		} else {
+			builder.getRawBeanDefinition().setBeanClass(BeforeSaveValidator.class);
+			builder.addPropertyValue("validator", validator);
+
+			return builder.getBeanDefinition();
+		}
+	}
+
+	private RuntimeBeanReference getValidator(Object source, ParserContext parserContext) {
+		if (!jsr303Present) {
+			return null;
+		}
+
+		RootBeanDefinition validatorDef = new RootBeanDefinition(LocalValidatorFactoryBean.class);
+		validatorDef.setSource(source);
+		validatorDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
+		String validatorName = parserContext.getReaderContext().registerWithGeneratedName(validatorDef);
+		parserContext.registerComponent(new BeanComponentDefinition(validatorDef, validatorName));
+
+		return new RuntimeBeanReference(validatorName);
+	}
+}

spring-data-mongodb/src/main/resources/org/springframework/data/mongodb/config/spring-mongo-1.0.xsd

@@ -16,6 +16,17 @@
 	<xsd:import namespace="http://www.springframework.org/schema/data/repository"
 				schemaLocation="http://www.springframework.org/schema/data/repository/spring-repository.xsd" />
 
+	<xsd:element name="validation-enabled">
+		<xsd:annotation>
+			<xsd:documentation source="org.springframework.data.mongodb.core.mapping.event.BeforeSaveValidator"><![CDATA[
+Creates instance of JSR-303 based validatior that its invoked on Mongo documents before they are saved.
+			]]></xsd:documentation>
+		</xsd:annotation>
+		<xsd:simpleType>
+			<xsd:restriction base="xsd:string" />
+		</xsd:simpleType>
+	</xsd:element>
+
 	<xsd:element name="mongo" type="mongoType">
 		<xsd:annotation>
 			<xsd:documentation source="org.springframework.data.mongodb.core.core.MongoFactoryBean"><![CDATA[