Align internal caches with core framework patterns.

Initialize maps and sets with size where possible.

Closes #3067
Original pull request: #3073

Author: christophstrobl

src/main/java/org/springframework/data/auditing/MappingAuditableBeanWrapperFactory.java

@@ -19,6 +19,7 @@
 import java.time.temporal.TemporalAccessor;
 import java.util.Map;
 import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.Predicate;
 import java.util.stream.Stream;
 
@@ -40,7 +41,6 @@
 import org.springframework.data.mapping.context.PersistentEntities;
 import org.springframework.data.util.Lazy;
 import org.springframework.util.Assert;
-import org.springframework.util.ConcurrentReferenceHashMap;
 
 /**
  * {@link AuditableBeanWrapperFactory} that will create am {@link AuditableBeanWrapper} using mapping information
@@ -67,7 +67,7 @@ public MappingAuditableBeanWrapperFactory(PersistentEntities entities) {
 		Assert.notNull(entities, "PersistentEntities must not be null");
 
 		this.entities = entities;
-		this.metadataCache = new ConcurrentReferenceHashMap<>();
+		this.metadataCache = new ConcurrentHashMap<>();
 	}
 
 	@Override

src/main/java/org/springframework/data/convert/SimplePropertyValueConverterRegistry.java

@@ -32,12 +32,14 @@
 public class SimplePropertyValueConverterRegistry<P extends PersistentProperty<P>>
 		implements ValueConverterRegistry<P> {
 
-	private final Map<Key, PropertyValueConverter<?, ?, ? extends ValueConversionContext<P>>> converterRegistrationMap = new LinkedHashMap<>();
+	private final Map<Key, PropertyValueConverter<?, ?, ? extends ValueConversionContext<P>>> converterRegistrationMap;
 
-	public SimplePropertyValueConverterRegistry() {}
+	public SimplePropertyValueConverterRegistry() {
+		this.converterRegistrationMap = new LinkedHashMap<>();
+	}
 
 	SimplePropertyValueConverterRegistry(SimplePropertyValueConverterRegistry<P> source) {
-		this.converterRegistrationMap.putAll(source.converterRegistrationMap);
+		this.converterRegistrationMap = new LinkedHashMap<>(source.converterRegistrationMap);
 	}
 
 	@Override

src/main/java/org/springframework/data/domain/ExampleMatcher.java

@@ -775,12 +775,14 @@ protected boolean canEqual(final Object other) {
 	 */
 	class PropertySpecifiers {
 
-		private final Map<String, PropertySpecifier> propertySpecifiers = new LinkedHashMap<>();
+		private final Map<String, PropertySpecifier> propertySpecifiers;
 
-		PropertySpecifiers() {}
+		PropertySpecifiers() {
+			this. propertySpecifiers = new LinkedHashMap<>();
+		}
 
 		PropertySpecifiers(PropertySpecifiers propertySpecifiers) {
-			this.propertySpecifiers.putAll(propertySpecifiers.propertySpecifiers);
+			this.propertySpecifiers = new LinkedHashMap<>(propertySpecifiers.propertySpecifiers);
 		}
 
 		public void add(PropertySpecifier specifier) {

src/main/java/org/springframework/data/geo/format/DistanceFormatter.java

@@ -47,7 +47,7 @@ public enum DistanceFormatter implements Converter<String, Distance>, Formatter<
 
 	static {
 
-		Map<String, Metric> metrics = new LinkedHashMap<>();
+		Map<String, Metric> metrics = new LinkedHashMap<>(Metrics.values().length);
 
 		for (Metric metric : Metrics.values()) {
 			metrics.put(metric.getAbbreviation(), metric);

src/main/java/org/springframework/data/mapping/callback/DefaultEntityCallbacks.java

@@ -17,6 +17,7 @@
 
 import java.lang.reflect.Method;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.BiFunction;
 
 import org.apache.commons.logging.Log;
@@ -26,7 +27,6 @@
 import org.springframework.core.ResolvableType;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
-import org.springframework.util.ConcurrentReferenceHashMap;
 import org.springframework.util.ReflectionUtils;
 
 /**
@@ -40,7 +40,7 @@
  */
 class DefaultEntityCallbacks implements EntityCallbacks {
 
-	private final Map<Class<?>, Method> callbackMethodCache = new ConcurrentReferenceHashMap<>(64);
+	private final Map<Class<?>, Method> callbackMethodCache = new ConcurrentHashMap<>(64);
 	private final SimpleEntityCallbackInvoker callbackInvoker = new SimpleEntityCallbackInvoker();
 	private final EntityCallbackDiscoverer callbackDiscoverer;
 

src/main/java/org/springframework/data/mapping/callback/DefaultReactiveEntityCallbacks.java

@@ -19,6 +19,7 @@
 
 import java.lang.reflect.Method;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.BiFunction;
 
 import org.apache.commons.logging.Log;
@@ -28,7 +29,6 @@
 import org.springframework.core.ResolvableType;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
-import org.springframework.util.ConcurrentReferenceHashMap;
 import org.springframework.util.ReflectionUtils;
 
 /**
@@ -41,7 +41,7 @@
  */
 class DefaultReactiveEntityCallbacks implements ReactiveEntityCallbacks {
 
-	private final Map<Class<?>, Method> callbackMethodCache = new ConcurrentReferenceHashMap<>(64);
+	private final Map<Class<?>, Method> callbackMethodCache = new ConcurrentHashMap<>(64);
 	private final ReactiveEntityCallbackInvoker callbackInvoker = new DefaultReactiveEntityCallbackInvoker();
 	private final EntityCallbackDiscoverer callbackDiscoverer;
 

src/main/java/org/springframework/data/mapping/callback/EntityCallbackDiscoverer.java

@@ -38,7 +38,6 @@
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
-import org.springframework.util.ConcurrentReferenceHashMap;
 import org.springframework.util.ReflectionUtils;
 import org.springframework.util.comparator.Comparators;
 
@@ -54,7 +53,7 @@ class EntityCallbackDiscoverer {
 
 	private final CallbackRetriever defaultRetriever = new CallbackRetriever();
 	private final Map<CallbackCacheKey, CallbackRetriever> retrieverCache = new ConcurrentHashMap<>(64);
-	private final Map<Class<?>, ResolvableType> entityTypeCache = new ConcurrentReferenceHashMap<>(64);
+	private final Map<Class<?>, ResolvableType> entityTypeCache = new ConcurrentHashMap<>(64);
 
 	@Nullable private ClassLoader beanClassLoader;
 

src/main/java/org/springframework/data/mapping/context/AbstractMappingContext.java

@@ -461,7 +461,7 @@ private E doAddPersistentEntity(TypeInformation<?> typeInformation) {
 
 			if (shouldCreateProperties(userTypeInformation)) {
 				PropertyDescriptor[] pds = BeanUtils.getPropertyDescriptors(type);
-				Map<String, PropertyDescriptor> descriptors = new HashMap<>();
+				Map<String, PropertyDescriptor> descriptors = new HashMap<>(pds.length);
 
 				for (PropertyDescriptor descriptor : pds) {
 					descriptors.put(descriptor.getName(), descriptor);

src/main/java/org/springframework/data/mapping/context/PersistentPropertyPathFactory.java

@@ -16,6 +16,7 @@
 package org.springframework.data.mapping.context;
 
 import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.Function;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;
@@ -33,7 +34,6 @@
 import org.springframework.data.util.TypeInformation;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
-import org.springframework.util.ConcurrentReferenceHashMap;
 import org.springframework.util.StringUtils;
 
 /**
@@ -49,7 +49,7 @@ class PersistentPropertyPathFactory<E extends PersistentEntity<?, P>, P extends
 
 	private static final Predicate<PersistentProperty<? extends PersistentProperty<?>>> IS_ENTITY = PersistentProperty::isEntity;
 
-	private final Map<TypeAndPath, PathResolution> propertyPaths = new ConcurrentReferenceHashMap<>();
+	private final Map<TypeAndPath, PathResolution> propertyPaths = new ConcurrentHashMap<>();
 	private final MappingContext<E, P> context;
 
 	public PersistentPropertyPathFactory(MappingContext<E, P> context) {

src/main/java/org/springframework/data/mapping/model/BasicPersistentEntity.java

@@ -27,6 +27,7 @@
 import java.util.Optional;
 import java.util.Set;
 import java.util.TreeSet;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.stream.Collectors;
 
 import org.springframework.core.annotation.AnnotatedElementUtils;
@@ -46,8 +47,6 @@
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
-import org.springframework.util.ConcurrentReferenceHashMap;
-import org.springframework.util.ConcurrentReferenceHashMap.ReferenceType;
 import org.springframework.util.MultiValueMap;
 import org.springframework.util.StringUtils;
 
@@ -117,9 +116,9 @@ public BasicPersistentEntity(TypeInformation<T> information, @Nullable Comparato
 		this.associations = comparator == null ? new HashSet<>() : new TreeSet<>(new AssociationComparator<>(comparator));
 
 		this.propertyCache = new HashMap<>(16, 1f);
-		this.annotationCache = new ConcurrentReferenceHashMap<>(16, ReferenceType.WEAK);
+		this.annotationCache = new ConcurrentHashMap<>(16);
 		this.propertyAnnotationCache = CollectionUtils
-				.toMultiValueMap(new ConcurrentReferenceHashMap<>(16, ReferenceType.WEAK));
+				.toMultiValueMap(new ConcurrentHashMap<>(16));
 		this.propertyAccessorFactory = BeanWrapperPropertyAccessorFactory.INSTANCE;
 		this.typeAlias = Lazy.of(() -> getAliasFromAnnotation(getType()));
 		this.isNewStrategy = Lazy.of(() -> Persistable.class.isAssignableFrom(information.getType()) //

src/main/java/org/springframework/data/mapping/model/BeanWrapper.java

@@ -32,7 +32,6 @@
 import org.springframework.data.util.KotlinReflectionUtils;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
-import org.springframework.util.ConcurrentReferenceHashMap;
 import org.springframework.util.ReflectionUtils;
 
 /**

src/main/java/org/springframework/data/mapping/model/ClassGeneratingPropertyAccessorFactory.java

@@ -1395,7 +1395,7 @@ private static int getInvokeOp(Method method, boolean interfaceDefinition) {
 	private static Map<String, PropertyStackAddress> createPropertyStackMap(
 			List<PersistentProperty<?>> persistentProperties) {
 
-		Map<String, PropertyStackAddress> stackmap = new HashMap<>();
+		Map<String, PropertyStackAddress> stackmap = new HashMap<>(persistentProperties.size());
 
 		for (PersistentProperty<?> property : persistentProperties) {
 			stackmap.put(property.getName(), new PropertyStackAddress(new Label(), property.getName().hashCode()));

src/main/java/org/springframework/data/projection/DefaultMethodInvokingMethodInterceptor.java

@@ -22,14 +22,13 @@
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import org.aopalliance.intercept.MethodInterceptor;
 import org.aopalliance.intercept.MethodInvocation;
 import org.springframework.aop.ProxyMethodInvocation;
 import org.springframework.lang.Nullable;
-import org.springframework.util.ConcurrentReferenceHashMap;
-import org.springframework.util.ConcurrentReferenceHashMap.ReferenceType;
 import org.springframework.util.ReflectionUtils;
 
 /**
@@ -43,7 +42,7 @@
 public class DefaultMethodInvokingMethodInterceptor implements MethodInterceptor {
 
 	private static final Lookup LOOKUP = MethodHandles.lookup();
-	private final Map<Method, MethodHandle> methodHandleCache = new ConcurrentReferenceHashMap<>(10, ReferenceType.WEAK);
+	private final Map<Method, MethodHandle> methodHandleCache = new ConcurrentHashMap<>();
 
 	/**
 	 * Returns whether the {@code interfaceClass} declares {@link Method#isDefault() default methods}.

src/main/java/org/springframework/data/projection/ProxyProjectionFactory.java

@@ -20,6 +20,7 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
 import org.aopalliance.intercept.MethodInterceptor;
 import org.aopalliance.intercept.MethodInvocation;
@@ -34,7 +35,6 @@
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
-import org.springframework.util.ConcurrentReferenceHashMap;
 
 /**
  * A {@link ProjectionFactory} to create JDK proxies to back interfaces and handle method invocations on them. By
@@ -60,7 +60,7 @@ class ProxyProjectionFactory implements ProjectionFactory, BeanClassLoaderAware
 	}
 
 	private final List<MethodInterceptorFactory> factories;
-	private final Map<Class<?>, ProjectionMetadata> projectionInformationCache = new ConcurrentReferenceHashMap<>();
+	private final Map<Class<?>, ProjectionMetadata> projectionInformationCache = new ConcurrentHashMap<>();
 	private @Nullable ClassLoader classLoader;
 
 	private final Lazy<DefaultMethodInvokingMethodInterceptor> defaultMethodInvokingMethodInterceptor = Lazy

src/main/java/org/springframework/data/projection/SpelEvaluatingMethodInterceptor.java

@@ -107,9 +107,10 @@ public SpelEvaluatingMethodInterceptor(MethodInterceptor delegate, Object target
 	private static Map<Integer, Expression> potentiallyCreateExpressionsForMethodsOnTargetInterface(
 			ExpressionParser parser, Class<?> targetInterface) {
 
-		Map<Integer, Expression> expressions = new HashMap<>();
+		Method[] methods = targetInterface.getMethods();
+		Map<Integer, Expression> expressions = new HashMap<>(methods.length);
 
-		for (Method method : targetInterface.getMethods()) {
+		for (Method method : methods) {
 
 			Value value = AnnotationUtils.findAnnotation(method, Value.class);
 			if (value == null) {

src/main/java/org/springframework/data/querydsl/binding/QuerydslBindingsFactory.java

@@ -18,6 +18,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.stream.Collectors;
 
 import org.springframework.beans.BeanUtils;
@@ -30,7 +31,6 @@
 import org.springframework.data.repository.support.Repositories;
 import org.springframework.data.util.TypeInformation;
 import org.springframework.util.Assert;
-import org.springframework.util.ConcurrentReferenceHashMap;
 
 import com.querydsl.core.types.EntityPath;
 
@@ -63,7 +63,7 @@ public QuerydslBindingsFactory(EntityPathResolver entityPathResolver) {
 		Assert.notNull(entityPathResolver, "EntityPathResolver must not be null");
 
 		this.entityPathResolver = entityPathResolver;
-		this.entityPaths = new ConcurrentReferenceHashMap<>();
+		this.entityPaths = new ConcurrentHashMap<>();
 		this.beanFactory = Optional.empty();
 		this.repositories = Optional.empty();
 		this.defaultCustomizer = NoOpCustomizer.INSTANCE;

src/main/java/org/springframework/data/repository/core/support/MethodInvocationValidator.java

@@ -18,6 +18,7 @@
 import java.lang.annotation.ElementType;
 import java.lang.reflect.Method;
 import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
 
 import org.aopalliance.intercept.MethodInterceptor;
 import org.aopalliance.intercept.MethodInvocation;
@@ -49,7 +50,7 @@
 public class MethodInvocationValidator implements MethodInterceptor {
 
 	private final ParameterNameDiscoverer discoverer = new DefaultParameterNameDiscoverer();
-	private final Map<Method, Nullability> nullabilityCache = new ConcurrentReferenceHashMap<>(16, ReferenceType.WEAK);
+	private final Map<Method, Nullability> nullabilityCache = new ConcurrentHashMap<>(16);
 
 	/**
 	 * Returns {@literal true} if the {@code repositoryInterface} is supported by this interceptor.

src/main/java/org/springframework/data/repository/core/support/QueryExecutorMethodInterceptor.java

@@ -92,9 +92,10 @@ public QueryExecutorMethodInterceptor(RepositoryInformation repositoryInformatio
 	private Map<Method, RepositoryQuery> mapMethodsToQuery(RepositoryInformation repositoryInformation,
 			QueryLookupStrategy lookupStrategy, ProjectionFactory projectionFactory) {
 
-		Map<Method, RepositoryQuery> result = new HashMap<>();
+		List<Method> queryMethods = repositoryInformation.getQueryMethods().toList();
+		Map<Method, RepositoryQuery> result = new HashMap<>(queryMethods.size());
 
-		for (Method method : repositoryInformation.getQueryMethods()) {
+		for (Method method : queryMethods) {
 
 			Pair<Method, RepositoryQuery> pair = lookupQuery(method, repositoryInformation, lookupStrategy,
 					projectionFactory);

src/main/java/org/springframework/data/repository/core/support/RepositoryComposition.java

@@ -38,7 +38,6 @@
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
-import org.springframework.util.ConcurrentReferenceHashMap;
 import org.springframework.util.ObjectUtils;
 import org.springframework.util.ReflectionUtils;
 
@@ -101,7 +100,7 @@ public class RepositoryComposition {
 	private static final RepositoryComposition EMPTY = new RepositoryComposition(null, RepositoryFragments.empty(),
 			MethodLookups.direct(), PASSTHRU_ARG_CONVERTER);
 
-	private final Map<Method, Method> methodCache = new ConcurrentReferenceHashMap<>();
+	private final Map<Method, Method> methodCache = new ConcurrentHashMap<>();
 	private final RepositoryFragments fragments;
 	private final MethodLookup methodLookup;
 	private final BiFunction<Method, Object[], Object[]> argumentConverter;
@@ -365,7 +364,7 @@ public static class RepositoryFragments implements Streamable<RepositoryFragment
 
 		static final RepositoryFragments EMPTY = new RepositoryFragments(Collections.emptyList());
 
-		private final Map<Method, RepositoryFragment<?>> fragmentCache = new ConcurrentReferenceHashMap<>();
+		private final Map<Method, RepositoryFragment<?>> fragmentCache = new ConcurrentHashMap<>();
 		private final Map<Method, RepositoryMethodInvoker> invocationMetadataCache = new ConcurrentHashMap<>();
 		private final List<RepositoryFragment<?>> fragments;