Iterate map by using lambda function

igor-suhorukov · philwebb · commit ffc883b005b2 · 2018-03-19T07:50:54.000-04:00
Closes gh-12528
diff --git a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/context/properties/ConfigurationPropertiesReportEndpoint.java b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/context/properties/ConfigurationPropertiesReportEndpoint.java
@@ -112,13 +112,11 @@ private ContextConfigurationProperties describeConfigurationProperties(
 		Map<String, Object> beans = getConfigurationPropertiesBeans(context,
 				beanFactoryMetadata);
 		Map<String, ConfigurationPropertiesBeanDescriptor> beanDescriptors = new HashMap<>();
-		for (Map.Entry<String, Object> entry : beans.entrySet()) {
-			String beanName = entry.getKey();
-			Object bean = entry.getValue();
+		beans.forEach((beanName, bean) -> {
 			String prefix = extractPrefix(context, beanFactoryMetadata, beanName);
 			beanDescriptors.put(beanName, new ConfigurationPropertiesBeanDescriptor(
 					prefix, sanitize(prefix, safeSerialize(mapper, bean, prefix))));
-		}
+		});
 		return new ContextConfigurationProperties(beanDescriptors,
 				context.getParent() == null ? null : context.getParent().getId());
 	}
@@ -229,10 +227,8 @@ private String extractPrefix(ApplicationContext context,
 	 */
 	@SuppressWarnings("unchecked")
 	private Map<String, Object> sanitize(String prefix, Map<String, Object> map) {
-		for (Map.Entry<String, Object> entry : map.entrySet()) {
-			String key = entry.getKey();
+		map.forEach((key, value) -> {
 			String qualifiedKey = (prefix.isEmpty() ? prefix : prefix + ".") + key;
-			Object value = entry.getValue();
 			if (value instanceof Map) {
 				map.put(key, sanitize(qualifiedKey, (Map<String, Object>) value));
 			}
@@ -244,7 +240,7 @@ else if (value instanceof List) {
 				value = this.sanitizer.sanitize(qualifiedKey, value);
 				map.put(key, value);
 			}
-		}
+		});
 		return map;
 	}
 
diff --git a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/AbstractHealthAggregator.java b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/AbstractHealthAggregator.java
@@ -34,9 +34,7 @@ public abstract class AbstractHealthAggregator implements HealthAggregator {
 	@Override
 	public final Health aggregate(Map<String, Health> healths) {
 		List<Status> statusCandidates = new ArrayList<>();
-		for (Map.Entry<String, Health> entry : healths.entrySet()) {
-			statusCandidates.add(entry.getValue().getStatus());
-		}
+		healths.values().forEach(health -> statusCandidates.add(health.getStatus()));
 		Status status = aggregateStatus(statusCandidates);
 		Map<String, Object> details = aggregateDetails(healths);
 		return new Health.Builder(status, details).build();
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/cloud/CloudFoundryVcapEnvironmentPostProcessor.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/cloud/CloudFoundryVcapEnvironmentPostProcessor.java
@@ -20,7 +20,6 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.Properties;
 
 import org.apache.commons.logging.Log;
@@ -197,9 +196,8 @@ private void extractPropertiesFromServices(Properties properties,
 
 	@SuppressWarnings("unchecked")
 	private void flatten(Properties properties, Map<String, Object> input, String path) {
-		for (Entry<String, Object> entry : input.entrySet()) {
-			String key = getFullKey(path, entry.getKey());
-			Object value = entry.getValue();
+		input.forEach((entryKey, value) -> {
+			String key = getFullKey(path, entryKey);
 			if (value instanceof Map) {
 				// Need a compound key
 				flatten(properties, (Map<String, Object>) value, key);
@@ -227,7 +225,7 @@ else if (value instanceof Boolean) {
 			else {
 				properties.put(key, value == null ? "" : value);
 			}
-		}
+		});
 	}
 
 	private String getFullKey(String path, String key) {
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/env/SpringApplicationJsonEnvironmentPostProcessor.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/env/SpringApplicationJsonEnvironmentPostProcessor.java
@@ -126,10 +126,8 @@ private Map<String, Object> flatten(Map<String, Object> map) {
 
 	private void flatten(String prefix, Map<String, Object> result,
 			Map<String, Object> map) {
-		prefix = (prefix == null ? "" : prefix + ".");
-		for (Map.Entry<String, Object> entry : map.entrySet()) {
-			extract(prefix + entry.getKey(), result, entry.getValue());
-		}
+		String namePrefix = (prefix == null ? "" : prefix + ".");
+		map.forEach((key, value) -> extract(namePrefix + key, result, value));
 	}
 
 	@SuppressWarnings("unchecked")
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyServletWebServerFactory.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/jetty/JettyServletWebServerFactory.java
@@ -23,14 +23,11 @@
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.nio.channels.ReadableByteChannel;
-import java.nio.charset.Charset;
 import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
-import java.util.Locale;
-import java.util.Map;
 
 import org.eclipse.jetty.http.MimeTypes;
 import org.eclipse.jetty.server.AbstractConnector;
@@ -249,11 +246,8 @@ private boolean isNegative(Duration sessionTimeout) {
 	}
 
 	private void addLocaleMappings(WebAppContext context) {
-		for (Map.Entry<Locale, Charset> entry : getLocaleCharsetMappings().entrySet()) {
-			Locale locale = entry.getKey();
-			Charset charset = entry.getValue();
-			context.addLocaleEncoding(locale.toString(), charset.toString());
-		}
+		getLocaleCharsetMappings().forEach((locale, charset) ->
+				context.addLocaleEncoding(locale.toString(), charset.toString()));
 	}
 
 	private File getTempDirectory() {
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatServletWebServerFactory.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/TomcatServletWebServerFactory.java
@@ -30,8 +30,6 @@
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Locale;
-import java.util.Map;
-import java.util.Map.Entry;
 import java.util.Set;
 
 import javax.servlet.ServletContainerInitializer;
@@ -234,12 +232,8 @@ private void resetDefaultLocaleMapping(TomcatEmbeddedContext context) {
 	}
 
 	private void addLocaleMappings(TomcatEmbeddedContext context) {
-		for (Map.Entry<Locale, Charset> entry : getLocaleCharsetMappings().entrySet()) {
-			Locale locale = entry.getKey();
-			Charset charset = entry.getValue();
-			context.addLocaleEncodingMappingParameter(locale.toString(),
-					charset.toString());
-		}
+		getLocaleCharsetMappings().forEach((locale, charset) ->
+				context.addLocaleEncodingMappingParameter(locale.toString(), charset.toString()));
 	}
 
 	private void configureTldSkipPatterns(TomcatEmbeddedContext context) {
@@ -267,10 +261,7 @@ private void addJspServlet(Context context) {
 		jspServlet.setName("jsp");
 		jspServlet.setServletClass(getJsp().getClassName());
 		jspServlet.addInitParameter("fork", "false");
-		for (Entry<String, String> initParameter : getJsp().getInitParameters()
-				.entrySet()) {
-			jspServlet.addInitParameter(initParameter.getKey(), initParameter.getValue());
-		}
+		getJsp().getInitParameters().forEach(jspServlet::addInitParameter);
 		jspServlet.setLoadOnStartup(3);
 		context.addChild(jspServlet);
 		context.addServletMappingDecoded("*.jsp", "jsp");
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/FileSessionPersistence.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/FileSessionPersistence.java
@@ -69,10 +69,8 @@ private void save(Map<String, PersistentSession> sessionData, File file)
 	private void save(Map<String, PersistentSession> sessionData,
 			ObjectOutputStream stream) throws IOException {
 		Map<String, Serializable> session = new LinkedHashMap<>();
-		for (Map.Entry<String, PersistentSession> entry : sessionData.entrySet()) {
-			session.put(entry.getKey(),
-					new SerializablePersistentSession(entry.getValue()));
-		}
+		sessionData.forEach((key, value) ->
+				session.put(key, new SerializablePersistentSession(value)));
 		stream.writeObject(session);
 	}
 
@@ -104,13 +102,12 @@ private Map<String, PersistentSession> load(ObjectInputStream stream)
 		Map<String, SerializablePersistentSession> session = readSession(stream);
 		long time = System.currentTimeMillis();
 		Map<String, PersistentSession> result = new LinkedHashMap<>();
-		for (Map.Entry<String, SerializablePersistentSession> entry : session
-				.entrySet()) {
-			PersistentSession entrySession = entry.getValue().getPersistentSession();
+		session.forEach((key, value) -> {
+			PersistentSession entrySession = value.getPersistentSession();
 			if (entrySession.getExpiration().getTime() > time) {
-				result.put(entry.getKey(), entrySession);
+				result.put(key, entrySession);
 			}
-		}
+		});
 		return result;
 	}
 
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowServletWebServerFactory.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/undertow/UndertowServletWebServerFactory.java
@@ -20,15 +20,12 @@
 import java.io.IOException;
 import java.net.MalformedURLException;
 import java.net.URL;
-import java.nio.charset.Charset;
 import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
-import java.util.Locale;
-import java.util.Map;
 import java.util.Set;
 
 import javax.servlet.ServletContainerInitializer;
@@ -331,11 +328,8 @@ private XnioWorker createWorker() throws IOException {
 	}
 
 	private void addLocaleMappings(DeploymentInfo deployment) {
-		for (Map.Entry<Locale, Charset> entry : getLocaleCharsetMappings().entrySet()) {
-			Locale locale = entry.getKey();
-			Charset charset = entry.getValue();
-			deployment.addLocaleCharsetMapping(locale.toString(), charset.toString());
-		}
+		getLocaleCharsetMappings().forEach((locale, charset) ->
+				deployment.addLocaleCharsetMapping(locale.toString(), charset.toString()));
 	}
 
 	private void registerServletContainerInitializerToDriveServletContextInitializers(
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/server/MimeMappings.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/server/MimeMappings.java
@@ -244,9 +244,7 @@ public MimeMappings(MimeMappings mappings) {
 	public MimeMappings(Map<String, String> mappings) {
 		Assert.notNull(mappings, "Mappings must not be null");
 		this.map = new LinkedHashMap<>();
-		for (Map.Entry<String, String> entry : mappings.entrySet()) {
-			add(entry.getKey(), entry.getValue());
-		}
+		mappings.forEach(this::add);
 	}
 
 	/**
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/ServletContextInitializerBeans.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/ServletContextInitializerBeans.java
@@ -79,11 +79,10 @@ public ServletContextInitializerBeans(ListableBeanFactory beanFactory) {
 		addServletContextInitializerBeans(beanFactory);
 		addAdaptableBeans(beanFactory);
 		List<ServletContextInitializer> sortedInitializers = new ArrayList<>();
-		for (Map.Entry<?, List<ServletContextInitializer>> entry : this.initializers
-				.entrySet()) {
-			AnnotationAwareOrderComparator.sort(entry.getValue());
-			sortedInitializers.addAll(entry.getValue());
-		}
+		this.initializers.values().forEach(contextInitializers -> {
+			AnnotationAwareOrderComparator.sort(contextInitializers);
+			sortedInitializers.addAll(contextInitializers);
+		});
 		this.sortedList = Collections.unmodifiableList(sortedInitializers);
 	}
 
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/context/ServletWebServerApplicationContext.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/context/ServletWebServerApplicationContext.java
@@ -384,12 +384,12 @@ public ExistingWebApplicationScopes(ConfigurableListableBeanFactory beanFactory)
 		}
 
 		public void restore() {
-			for (Map.Entry<String, Scope> entry : this.scopes.entrySet()) {
+			this.scopes.forEach((key, value) -> {
 				if (logger.isInfoEnabled()) {
-					logger.info("Restoring user defined scope " + entry.getKey());
+					logger.info("Restoring user defined scope " + key);
 				}
-				this.beanFactory.registerScope(entry.getKey(), entry.getValue());
-			}
+				this.beanFactory.registerScope(key, value);
+			});
 		}
 
 	}
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/env/SystemEnvironmentPropertySourceEnvironmentPostProcessorTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/env/SystemEnvironmentPropertySourceEnvironmentPostProcessorTests.java
@@ -66,12 +66,12 @@ public void replacedPropertySourceShouldBeOriginAware() {
 				.getPropertySources().get("systemEnvironment");
 		Map<String, Object> originalMap = (Map<String, Object>) original.getSource();
 		Map<String, Object> replacedMap = replaced.getSource();
-		for (Map.Entry<String, Object> entry : originalMap.entrySet()) {
-			Object actual = replacedMap.get(entry.getKey());
-			assertThat(actual).isEqualTo(entry.getValue());
-			assertThat(replaced.getOrigin(entry.getKey()))
+		originalMap.forEach((key, value) -> {
+			Object actual = replacedMap.get(key);
+			assertThat(actual).isEqualTo(value);
+			assertThat(replaced.getOrigin(key))
 					.isInstanceOf(SystemEnvironmentOrigin.class);
-		}
+		});
 	}
 
 	@Test
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactoryTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactoryTests.java
@@ -44,8 +44,6 @@
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.zip.GZIPInputStream;
@@ -866,12 +864,9 @@ public void mimeMappingsAreCorrectlyConfigured() {
 		AbstractServletWebServerFactory factory = getFactory();
 		this.webServer = factory.getWebServer();
 		Map<String, String> configuredMimeMappings = getActualMimeMappings();
-		Set<Entry<String, String>> entrySet = configuredMimeMappings.entrySet();
 		Collection<MimeMappings.Mapping> expectedMimeMappings = getExpectedMimeMappings();
-		for (Entry<String, String> entry : entrySet) {
-			assertThat(expectedMimeMappings)
-					.contains(new MimeMappings.Mapping(entry.getKey(), entry.getValue()));
-		}
+		configuredMimeMappings.forEach((key, value) -> assertThat(expectedMimeMappings).
+				contains(new MimeMappings.Mapping(key, value)));
 		for (MimeMappings.Mapping mapping : expectedMimeMappings) {
 			assertThat(configuredMimeMappings).containsEntry(mapping.getExtension(),
 					mapping.getMimeType());
