Polish OnPropertyCondition

See gh-43754

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

@@ -27,6 +27,8 @@ import java.util.Map;
 import java.util.Set;
 import java.util.SortedMap;
 import java.util.TreeMap;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
 
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
@@ -237,6 +239,15 @@ public final class ConditionEvaluationReport {
 			return true;
 		}
 
+		/**
+		 * Return a {@link Stream} of the {@link ConditionAndOutcome} items.
+		 * @return a stream of the {@link ConditionAndOutcome} items.
+		 * @since 3.5.0
+		 */
+		public Stream<ConditionAndOutcome> stream() {
+			return StreamSupport.stream(spliterator(), false);
+		}
+
 		@Override
 		public Iterator<ConditionAndOutcome> iterator() {
 			return Collections.unmodifiableSet(this.outcomes).iterator();

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

@@ -28,7 +28,6 @@ import org.springframework.core.Ordered;
 import org.springframework.core.annotation.AnnotationAttributes;
 import org.springframework.core.annotation.MergedAnnotation;
 import org.springframework.core.annotation.MergedAnnotationPredicates;
-import org.springframework.core.annotation.MergedAnnotations;
 import org.springframework.core.annotation.Order;
 import org.springframework.core.env.PropertyResolver;
 import org.springframework.core.type.AnnotatedTypeMetadata;
@@ -51,15 +50,14 @@ class OnPropertyCondition extends SpringBootCondition {
 
 	@Override
 	public ConditionOutcome getMatchOutcome(ConditionContext context, AnnotatedTypeMetadata metadata) {
-		MergedAnnotations annotations = metadata.getAnnotations();
-		List<MergedAnnotation<Annotation>> allAnnotations = Stream
-			.concat(annotations.stream(ConditionalOnProperty.class.getName()),
-					annotations.stream(ConditionalOnBooleanProperty.class.getName()))
+		List<MergedAnnotation<Annotation>> annotations = Stream
+			.concat(metadata.getAnnotations().stream(ConditionalOnProperty.class.getName()),
+					metadata.getAnnotations().stream(ConditionalOnBooleanProperty.class.getName()))
 			.filter(MergedAnnotationPredicates.unique(MergedAnnotation::getMetaTypes))
 			.toList();
 		List<ConditionMessage> noMatch = new ArrayList<>();
 		List<ConditionMessage> match = new ArrayList<>();
-		for (MergedAnnotation<Annotation> annotation : allAnnotations) {
+		for (MergedAnnotation<Annotation> annotation : annotations) {
 			ConditionOutcome outcome = determineOutcome(annotation, context.getEnvironment());
 			(outcome.isMatch() ? match : noMatch).add(outcome.getConditionMessage());
 		}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnBooleanPropertyTests.java

@@ -17,11 +17,13 @@
 package org.springframework.boot.autoconfigure.condition;
 
 import java.util.function.Consumer;
+import java.util.stream.Collectors;
 
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.autoconfigure.condition.ConditionEvaluationReport.ConditionAndOutcomes;
 import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.boot.test.util.TestPropertyValues;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -181,12 +183,13 @@ class ConditionalOnBooleanPropertyTests {
 	}
 
 	private String getConditionEvaluationReport() {
-		ConditionEvaluationReport report = ConditionEvaluationReport.get(this.context.getBeanFactory());
-		StringBuilder builder = new StringBuilder();
-		report.getConditionAndOutcomesBySource()
+		return ConditionEvaluationReport.get(this.context.getBeanFactory())
+			.getConditionAndOutcomesBySource()
 			.values()
-			.forEach((outcomes) -> outcomes.forEach((outcome) -> builder.append(outcome.toString()).append('\n')));
-		return builder.toString();
+			.stream()
+			.flatMap(ConditionAndOutcomes::stream)
+			.map(Object::toString)
+			.collect(Collectors.joining("\n"));
 	}
 
 	private void load(Class<?> config, String... environment) {

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/condition/ConditionalOnPropertyTests.java

@@ -21,11 +21,13 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 import java.util.function.Consumer;
+import java.util.stream.Collectors;
 
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.autoconfigure.condition.ConditionEvaluationReport.ConditionAndOutcomes;
 import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.boot.test.util.TestPropertyValues;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -293,12 +295,13 @@ class ConditionalOnPropertyTests {
 	}
 
 	private String getConditionEvaluationReport() {
-		ConditionEvaluationReport report = ConditionEvaluationReport.get(this.context.getBeanFactory());
-		StringBuilder builder = new StringBuilder();
-		report.getConditionAndOutcomesBySource()
+		return ConditionEvaluationReport.get(this.context.getBeanFactory())
+			.getConditionAndOutcomesBySource()
 			.values()
-			.forEach((outcomes) -> outcomes.forEach((outcome) -> builder.append(outcome.toString()).append('\n')));
-		return builder.toString();
+			.stream()
+			.flatMap(ConditionAndOutcomes::stream)
+			.map(Object::toString)
+			.collect(Collectors.joining("\n"));
 	}
 
 	@Configuration(proxyBeanMethods = false)