Fix failure analysis for Collections and Maps

Closes gh-6996

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/diagnostics/analyzer/NoSuchBeanDefinitionFailureAnalyzer.java

@@ -35,6 +35,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
 import org.springframework.boot.diagnostics.FailureAnalysis;
 import org.springframework.boot.diagnostics.analyzer.AbstractInjectionFailureAnalyzer;
 import org.springframework.context.annotation.Bean;
+import org.springframework.core.ResolvableType;
 import org.springframework.core.type.MethodMetadata;
 import org.springframework.core.type.classreading.CachingMetadataReaderFactory;
 import org.springframework.core.type.classreading.MetadataReader;
@@ -94,12 +95,25 @@ class NoSuchBeanDefinitionFailureAnalyzer
 	}
 
 	private String getBeanDescription(NoSuchBeanDefinitionException cause) {
-		if (cause.getBeanType() != null) {
+		if (cause.getResolvableType() != null) {
-			return "a bean of type '" + cause.getBeanType().getName() + "'";
+			Class<?> type = extractBeanType(cause.getResolvableType());
+			return "a bean of type '" + type.getName() + "'";
 		}
 		return "a bean named '" + cause.getBeanName() + "'";
 	}
 
+	private Class<?> extractBeanType(ResolvableType resolvableType) {
+		ResolvableType collectionType = resolvableType.asCollection();
+		if (!collectionType.equals(ResolvableType.NONE)) {
+			return collectionType.getGeneric(0).getRawClass();
+		}
+		ResolvableType mapType = resolvableType.asMap();
+		if (!mapType.equals(ResolvableType.NONE)) {
+			return mapType.getGeneric(1).getRawClass();
+		}
+		return resolvableType.getRawClass();
+	}
+
 	private List<AutoConfigurationResult> getAutoConfigurationResults(
 			NoSuchBeanDefinitionException cause) {
 		List<AutoConfigurationResult> results = new ArrayList<AutoConfigurationResult>();
@@ -203,9 +217,9 @@ class NoSuchBeanDefinitionFailureAnalyzer
 				return false;
 			}
 			String name = cause.getBeanName();
-			Class<?> type = cause.getBeanType();
+			ResolvableType resolvableType = cause.getResolvableType();
 			return ((name != null && hasName(candidate, name))
-					|| (type != null && hasType(candidate, type)));
+					|| (resolvableType != null && hasType(candidate, extractBeanType(resolvableType))));
 		}
 
 		private boolean hasName(MethodMetadata methodMetadata, String name) {

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/diagnostics/analyzer/NoSuchBeanDefinitionFailureAnalyzerTests.java

@@ -17,7 +17,9 @@
 package org.springframework.boot.autoconfigure.diagnostics.analyzer;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
+import java.util.Map;
 
 import org.junit.Test;
 
@@ -81,6 +83,30 @@ public class NoSuchBeanDefinitionFailureAnalyzerTests {
 		assertActionMissingType(analysis, String.class);
 	}
 
+	@Test
+	public void failureAnalysisForMissingCollectionType() throws Exception {
+		FailureAnalysis analysis = analyzeFailure(
+				createFailure(StringCollectionConfiguration.class));
+		assertDescriptionConstructorMissingType(analysis, StringCollectionHandler.class, 0,
+				String.class);
+		assertBeanMethodDisabled(analysis,
+				"did not find property 'spring.string.enabled'",
+				TestPropertyAutoConfiguration.class, "string");
+		assertActionMissingType(analysis, String.class);
+	}
+
+	@Test
+	public void failureAnalysisForMissingMapType() throws Exception {
+		FailureAnalysis analysis = analyzeFailure(
+				createFailure(StringMapConfiguration.class));
+		assertDescriptionConstructorMissingType(analysis, StringMapHandler.class, 0,
+				String.class);
+		assertBeanMethodDisabled(analysis,
+				"did not find property 'spring.string.enabled'",
+				TestPropertyAutoConfiguration.class, "string");
+		assertActionMissingType(analysis, String.class);
+	}
+
 	@Test
 	public void failureAnalysisForMissingPropertySubType() {
 		FailureAnalysis analysis = analyzeFailure(
@@ -239,6 +265,20 @@ public class NoSuchBeanDefinitionFailureAnalyzerTests {
 
 	}
 
+	@Configuration
+	@ImportAutoConfiguration(TestPropertyAutoConfiguration.class)
+	@Import(StringCollectionHandler.class)
+	protected static class StringCollectionConfiguration {
+
+	}
+
+	@Configuration
+	@ImportAutoConfiguration(TestPropertyAutoConfiguration.class)
+	@Import(StringMapHandler.class)
+	protected static class StringMapConfiguration {
+
+	}
+
 	@Configuration
 	@ImportAutoConfiguration(TestPropertyAutoConfiguration.class)
 	@Import(NumberHandler.class)
@@ -329,4 +369,18 @@ public class NoSuchBeanDefinitionFailureAnalyzerTests {
 
 	}
 
+	protected static class StringCollectionHandler {
+
+		public StringCollectionHandler(Collection<String> collection) {
+		}
+
+	}
+
+	protected static class StringMapHandler {
+
+		public StringMapHandler(Map<String, String> map) {
+		}
+
+	}
+
 }