Narrow scope of some variables

Closes gh-11743

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/BeanTypeRegistry.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -160,11 +160,11 @@ final class BeanTypeRegistry implements SmartInitializingSingleton {
 
 	private void addBeanTypeForNonAliasDefinition(String name) {
 		try {
-			String factoryName = BeanFactory.FACTORY_BEAN_PREFIX + name;
 			RootBeanDefinition beanDefinition = (RootBeanDefinition) this.beanFactory
 					.getMergedBeanDefinition(name);
 			if (!beanDefinition.isAbstract()
 					&& !requiresEagerInit(beanDefinition.getFactoryBeanName())) {
+				String factoryName = BeanFactory.FACTORY_BEAN_PREFIX + name;
 				if (this.beanFactory.isFactoryBean(factoryName)) {
 					Class<?> factoryBeanGeneric = getFactoryBeanGeneric(this.beanFactory,
 							beanDefinition, name);

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/OnClassCondition.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -157,10 +157,10 @@ class OnClassCondition extends SpringBootCondition
 			Class<?> annotationType) {
 		MultiValueMap<String, Object> attributes = metadata
 				.getAllAnnotationAttributes(annotationType.getName(), true);
-		List<String> candidates = new ArrayList<>();
 		if (attributes == null) {
 			return Collections.emptyList();
 		}
+		List<String> candidates = new ArrayList<>();
 		addAll(candidates, attributes.get("value"));
 		addAll(candidates, attributes.get("name"));
 		return candidates;

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/domain/EntityScanner.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -64,7 +64,6 @@ public class EntityScanner {
 		if (packages.isEmpty()) {
 			return Collections.emptySet();
 		}
-		Set<Class<?>> entitySet = new HashSet<>();
 		ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(
 				false);
 		scanner.setEnvironment(this.context.getEnvironment());
@@ -72,6 +71,7 @@ public class EntityScanner {
 		for (Class<? extends Annotation> annotationType : annotationTypes) {
 			scanner.addIncludeFilter(new AnnotationTypeFilter(annotationType));
 		}
+		Set<Class<?>> entitySet = new HashSet<>();
 		for (String basePackage : packages) {
 			if (StringUtils.hasText(basePackage)) {
 				for (BeanDefinition candidate : scanner

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/logging/ConditionEvaluationReportMessage.java

 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -135,7 +135,6 @@ public class ConditionEvaluationReportMessage {
 
 	private Map<String, ConditionAndOutcomes> orderByName(
 			Map<String, ConditionAndOutcomes> outcomes) {
-		Map<String, ConditionAndOutcomes> result = new LinkedHashMap<>();
 		List<String> names = new ArrayList<>();
 		Map<String, String> classNames = new HashMap<>();
 		for (String name : outcomes.keySet()) {
@@ -144,6 +143,7 @@ public class ConditionEvaluationReportMessage {
 			classNames.put(shortName, name);
 		}
 		Collections.sort(names);
+		Map<String, ConditionAndOutcomes> result = new LinkedHashMap<>();
 		for (String shortName : names) {
 			result.put(shortName, outcomes.get(classNames.get(shortName)));
 		}

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/ServletContextInitializerBeans.java

@@ -216,7 +216,6 @@ public class ServletContextInitializerBeans
 
 	private <T> List<Entry<String, T>> getOrderedBeansOfType(
 			ListableBeanFactory beanFactory, Class<T> type, Set<?> excludes) {
-		List<Entry<String, T>> beans = new ArrayList<>();
 		Comparator<Entry<String, T>> comparator = (o1,
 				o2) -> AnnotationAwareOrderComparator.INSTANCE.compare(o1.getValue(),
 						o2.getValue());
@@ -230,6 +229,7 @@ public class ServletContextInitializerBeans
 				}
 			}
 		}
+		List<Entry<String, T>> beans = new ArrayList<>();
 		beans.addAll(map.entrySet());
 		beans.sort(comparator);
 		return beans;