Upgrade to hibernate-validator 5.3.4

Upgrade to `hibernate-validator` 5.3.4 and introduce a new
`MessageInterpolatorFactory` that creates a suitable
`MessageInterpolator` (taking into account missing EL dependencies).

Rework `ConfigurationPropertiesBindingPostProcessor` and
`ValidationAutoConfiguration` to make use of the new factory.

Fixes gh-7598

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/validation/ValidationAutoConfiguration.java

@@ -27,6 +27,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnResource;
 import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
+import org.springframework.boot.validation.MessageInterpolatorFactory;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ConditionContext;
 import org.springframework.context.annotation.Conditional;
@@ -51,7 +52,10 @@ public class ValidationAutoConfiguration {
 	@Bean
 	@ConditionalOnMissingBean
 	public Validator validator() {
-		return new LocalValidatorFactoryBean();
+		LocalValidatorFactoryBean factoryBean = new LocalValidatorFactoryBean();
+		MessageInterpolatorFactory interpolatorFactory = new MessageInterpolatorFactory();
+		factoryBean.setMessageInterpolator(interpolatorFactory.getObject());
+		return factoryBean;
 	}
 
 	@Bean

spring-boot-dependencies/pom.xml

@@ -87,7 +87,7 @@
 		<hazelcast-hibernate4.version>3.7.1</hazelcast-hibernate4.version>
 		<hazelcast-hibernate5.version>1.1.3</hazelcast-hibernate5.version>
 		<hibernate.version>5.0.11.Final</hibernate.version>
-		<hibernate-validator.version>5.2.4.Final</hibernate-validator.version>
+		<hibernate-validator.version>5.3.4.Final</hibernate-validator.version>
 		<hikaricp.version>2.5.1</hikaricp.version>
 		<hikaricp-java6.version>2.3.13</hikaricp-java6.version>
 		<hsqldb.version>2.3.3</hsqldb.version>

spring-boot/src/main/java/org/springframework/boot/context/properties/ConfigurationPropertiesBindingPostProcessor.java

@@ -35,6 +35,7 @@ import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.config.BeanPostProcessor;
 import org.springframework.boot.bind.PropertiesConfigurationFactory;
+import org.springframework.boot.validation.MessageInterpolatorFactory;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.context.ApplicationListener;
@@ -400,7 +401,9 @@ public class ConfigurationPropertiesBindingPostProcessor implements BeanPostProc
 
 		public Validator run(ApplicationContext applicationContext) {
 			LocalValidatorFactoryBean validator = new LocalValidatorFactoryBean();
+			MessageInterpolatorFactory interpolatorFactory = new MessageInterpolatorFactory();
 			validator.setApplicationContext(applicationContext);
+			validator.setMessageInterpolator(interpolatorFactory.getObject());
 			validator.afterPropertiesSet();
 			return validator;
 		}

spring-boot/src/main/java/org/springframework/boot/validation/MessageInterpolatorFactory.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2012-2017 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.boot.validation;
+
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+import javax.validation.MessageInterpolator;
+import javax.validation.Validation;
+import javax.validation.ValidationException;
+
+import org.springframework.beans.BeanUtils;
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.ObjectFactory;
+import org.springframework.util.ClassUtils;
+
+/**
+ * {@link ObjectFactory} that can be used to create a {@link MessageInterpolatorFactory}.
+ * Attempts to pick the most appropriate {@link MessageInterpolator} based on the
+ * classpath.
+ *
+ * @author Phillip Webb
+ */
+public class MessageInterpolatorFactory implements ObjectFactory<MessageInterpolator> {
+
+	private static final Set<String> FALLBACKS;
+
+	static {
+		Set<String> fallbacks = new LinkedHashSet<String>();
+		fallbacks.add("org.hibernate.validator.messageinterpolation"
+				+ ".ParameterMessageInterpolator");
+		FALLBACKS = Collections.unmodifiableSet(fallbacks);
+	}
+
+	@Override
+	public MessageInterpolator getObject() throws BeansException {
+		try {
+			return Validation.byDefaultProvider().configure()
+					.getDefaultMessageInterpolator();
+		}
+		catch (ValidationException ex) {
+			MessageInterpolator fallback = getFallback();
+			if (fallback != null) {
+				return fallback;
+			}
+			throw ex;
+		}
+	}
+
+	private MessageInterpolator getFallback() {
+		for (String fallback : FALLBACKS) {
+			try {
+				return getFallback(fallback);
+			}
+			catch (Exception ex) {
+				// Swallow an continue
+			}
+		}
+		return null;
+	}
+
+	private MessageInterpolator getFallback(String fallback) {
+		Class<?> interpolatorClass = ClassUtils.resolveClassName(fallback, null);
+		Object interpolator = BeanUtils.instantiate(interpolatorClass);
+		return (MessageInterpolator) interpolator;
+	}
+
+}

spring-boot/src/main/java/org/springframework/boot/validation/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-2016 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.
+ */
+
+/**
+ * Utilities and classes related to validation.
+ */
+package org.springframework.boot.validation;

spring-boot/src/test/java/org/springframework/boot/validation/MessageInterpolatorFactoryTests.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2012-2017 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.boot.validation;
+
+import javax.validation.MessageInterpolator;
+
+import org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator;
+import org.junit.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link MessageInterpolatorFactory}.
+ *
+ * @author Phillip Webb
+ */
+public class MessageInterpolatorFactoryTests {
+
+	@Test
+	public void getObjectShouldReturnResourceBundleMessageInterpolator() {
+		MessageInterpolator interpolator = new MessageInterpolatorFactory().getObject();
+		assertThat(interpolator).isInstanceOf(ResourceBundleMessageInterpolator.class);
+	}
+
+}

spring-boot/src/test/java/org/springframework/boot/validation/MessageInterpolatorFactoryWithoutElIntegrationTests.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2012-2017 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.boot.validation;
+
+import javax.validation.MessageInterpolator;
+import javax.validation.Validation;
+import javax.validation.ValidationException;
+
+import org.hibernate.validator.messageinterpolation.ParameterMessageInterpolator;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.runner.RunWith;
+
+import org.springframework.boot.junit.runner.classpath.ClassPathExclusions;
+import org.springframework.boot.junit.runner.classpath.ModifiedClassPathRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for {@link MessageInterpolatorFactory} without EL.
+ *
+ * @author Phillip Webb
+ */
+@RunWith(ModifiedClassPathRunner.class)
+@ClassPathExclusions("tomcat-embed-el-*.jar")
+public class MessageInterpolatorFactoryWithoutElIntegrationTests {
+
+	@Rule
+	public ExpectedException thrown = ExpectedException.none();
+
+	@Test
+	public void defaultMessageInterpolatorShouldFail() throws Exception {
+		// Sanity test
+		this.thrown.expect(ValidationException.class);
+		this.thrown.expectMessage("javax.el.ExpressionFactory");
+		Validation.byDefaultProvider().configure().getDefaultMessageInterpolator();
+	}
+
+	@Test
+	public void getObjectShouldUseFallback() {
+		MessageInterpolator interpolator = new MessageInterpolatorFactory().getObject();
+		assertThat(interpolator).isInstanceOf(ParameterMessageInterpolator.class);
+	}
+
+}