spring_core_dart 0.3.2

Spring Core for Dart and Flutter: annotation-based dependency injection, application.properties configuration, profiles, events, SpEL, validation and AOP.

0.3.2

• feat: hot reload on the Dart VM, flutter_notes example, fixes for example resources and workspace builds
• feat: spring_boot_starter_web, WebSocket server endpoints, uploads and downloads

0.3.1

• The example is a small Spring Boot application written by the generator (beans, @Value, SpEL, events) instead of hand-written bean definitions.
• README: loggers come from @Log (the logging section starts with it).

0.3.0

• feat(spring_boot_starter_flutter): themes from properties, free reads in Spring widgets

0.2.3

• add spring application handling
• docs(spring_boot_starter_flutter): add an example for pub.dev

0.2.2

• ci: run only the tests of the packages a change affects

0.2.1

• @Log(topic:, fieldName:): a log getter generated for the class, like Lombok's @Slf4j (needs the matching generator)

0.2.0

• AOP: MethodSignature.mergedAnnotations: the annotations of the member and of every declaration it overrides or implements (superclasses, mixins, interfaces), most specific first, like Spring's AnnotatedElementUtils find semantics (annotations stays what @annotation(...) matches); method validation reads @Validated groups on a method from it, so those on an overridden superclass method apply (needs the matching spring_core_dart_generator)

• resources: UrlResource.existsAsync() sends a HEAD request (a GET when the server rejects HEAD), like Spring's exists(); config data (spring.config.import=http://…, its -<profile> variants, optional:) and @PropertySource(ignoreResourceNotFound: true) use it, so a 404 is a missing resource instead of a failed read

• @Import order per configuration class, like Spring's ConfigurationClassParser and ConfigurationClassBeanDefinitionReader (was per module): parsing (only parse-phase conditions count) loads a class's @PropertySources and runs its ImportSelectors, whose modules are parsed at once (their @PropertySources are visible to later parse-phase conditions) and whose classes are read before the importing class; the reader then goes class by class in parse order and decides each class once — skipped when every class importing it was skipped (Spring's TrackedConditionEvaluator), else by its registerBean-phase conditions — for the class, its @Bean methods and its imports alike: a kept class registers its @Bean methods (each one's own registerBean-phase conditions decided at that moment), then runs its registrars, so every later class sees their beans (a later @ConditionalOnMissingBean @Bean backs off for the beans of an earlier class's registrar); a skipped class registers nothing and runs no registrar, while its @PropertySources still load; a class whose condition looks for the bean its imported class defines stays registered (one decision, cached per class key); a module selected by several classes is skipped only when all of them are, and no longer imported once registered directly; a class with @Bean methods or imports is a (lite) configuration class, decided in the reader like @Configuration, and so is any class-sourced definition (a scanned @Component or an @Imported class) with a registerBean-phase condition, at its place in class order (Spring's lite configuration candidates; it was decided while parsing, so it missed earlier classes' @Bean and registrar beans); only a hand-written definition with neither a source nor a factoryMethodName is still decided at once; the condition evaluation report lists an outcome once per source; new ImportDeclaration.importer (the importing class, emitted by the matching spring_core_dart_generator)

• AOP: MethodSignature.superclassAnnotations (the annotations of each superclass and mixin of the class whose body runs for the member, nearest first) and implementingTypeHierarchyAnnotations (that class's, then those), the class hierarchy Spring's AnnotationUtils.findAnnotation searches (needs the matching spring_core_dart_generator)

• events: lazy GenericApplicationListener / SmartApplicationListener beans (@Lazy, spring.main.lazy-initialization) are created by the first event and receive it (they never received events); the applicationListeners doc says which listeners it lists

• logging: SpringLog.hold() / SpringLogHold.release() hold back every record (any level) and emit those that pass the levels of release time, like Boot's DeferredLog

• AOP: an Advisor registered with registerSingleton (e.g. by a BeanFactoryPostProcessor) is applied; it is found by instance, like Spring's getBeanNamesForType(Advisor.class) (was never applied)

• AOP: a call through a @Lazy reference to a bean that is a subclass proxy is advised also while the bean's own code runs (@Lazy self-injection, as in Spring); it was skipped like a this. call

• AOP: an unbound this(Type) matches the interfaces @DeclareParents adds to the proxy (new introducedTypes: on pointcutMatchesBean, ExpressionPointcut.matchesBean / bind and ComposablePointcut.matchesBean; ProxyInvoker.introducedTypes)

• AOP: an execution(...) return type pattern may have type arguments with spaces (Map<String, int>) and be a negated group (!(String || int)); both were rejected

• breaking: SpEL safe navigation follows Spring 7's CompoundExpression: a ?. step on null gives null and the chain goes on, so a?.b.c with a null a fails with EL1007E on .c (was null); write a?.b?.c

• SpEL: inline lists and maps of literals are unmodifiable, like Spring's ({1, 2}.add(3) throws; {1, 1 + 1} is still a new mutable list)

• SpEL: the AST's toString() is Spring's toStringAST ((a > b), a?.b, a[0], -x, !a, (a ? b : c), (a ?: b); was (a gt b), a.b, a.[0], minus(x))

• SpEL: a negative index reports the size (EL1025E: The collection has '2' elements, index '-1' is invalid, was '?'; EL1026E for strings)

• SpEL on the web: real literals keep their kind in instanceof (2.0 instanceof T(Integer) and 2 instanceof T(Double) are false), and T(String).valueOf / format / join, '...'.formatted(...) and {2.0}.toString() print them like Java (2.0, [2.0])

• JSON: an enum with an int @JsonValue is read by value (20 or "20"), never by index, and an unmatched number fails (Jackson's isFromIntValue); other enums also accept an index as a string ("1")

• JSON: a map key of a class with @JsonValue is written as that value (was Instance of ...)

• JSON: a negative Duration is written like Java's Duration.toString (PT-1M-30S, PT-0.5S; was -PT1M30S)

• JSON: a read-only (access: readOnly) property that a constructor requires is reported as such (was "missing property" although present)

• breaking: JsonNode follows Jackson 3: NullNode and MissingNode are not equal; intValue() throws for a fraction, NaN or infinity; asString(), asInt(), asDouble() and asBoolean() without a default throw a JsonNodeException for what cannot be converted ("abc" or "1.5" for asInt(), objects and arrays), with a default return it (the parameters are nullable now); asString() of null and a missing node is '' (was 'null')

• beans: a BeanWrapper write past the end of a list fills the gap with null, like Spring (tags[1] into an empty List<String?> gives [null, t]), also without autoGrowNestedPaths; a list that cannot hold null gets, with autoGrowNestedPaths (on in DataBinder), the element type's empty value (tags[2] into a List<String> gives ['', '', z], '' being Spring's new String(); new introspected objects, lists, sets, maps), else fails with Spring's "List does not support filling up gaps with null elements" (List<int>), which DataBinder no longer reports as a typeMismatch of the bound value; auto-growing a nested path through a String creates ''

• validation: DataBinder.construct keeps list elements at their index (tags[1] alone gives [null, t]; was [t]); for non-nullable elements a gap is a typeMismatch error (tags[0])

• validation: DataBinder.construct pads a list only below autoGrowCollectionLimit (256), like Spring's createList: a higher index (notes[50000000]) throws an InvalidPropertyException before anything is allocated (it allocated a list up to that index)

• config data: spring.config.activate.on-cloud-platform documents are active only on that platform (they were always active); new CloudPlatform (Boot's: Kubernetes from KUBERNETES_SERVICE_HOST / _PORT or any *_SERVICE_HOST + *_SERVICE_PORT, Heroku DYNO, Cloud Foundry VCAP_APPLICATION / VCAP_SERVICES, SAP, Nomad, Azure App Service, Amazon ECS), spring.main.cloud-platform enforces one or none

• conversion: a single value converts to a one-element List / Set (ObjectToCollectionConverter); Map → Map<K, V> (new ConverterRegistry.addMapConverters<K, V>(), defaults for Map<String, V>); String ↔ Encoding; BigInt → int (failing on overflow) / double, num → BigInt; an enum converts to its name (red, was Color.red), also in ${...} placeholders; addEnum adds the List<E> / Set<E> converters

• resources: http: / https: locations are a new UrlResource (read asynchronously; was a missing resource); embedded classpath resources have a filename and createRelative

• @PropertySource locations with a pattern (file:conf/*.properties, classpath*:) load every match, none being fine (Spring 6.1)

• YAML integers beyond int are BigInt (were doubles)

• events: EventListenerMethod(resultType:) / EventResultType<R>: listener results are published as their declared type, so PayloadApplicationEvent<R> listeners get them (needs the matching spring_core_dart_generator)

• ConfigurableApplicationContext.applicationListeners (Spring's getApplicationListeners); ConfigurableBeanFactory.registerAlias

• ReloadableResourceBundleMessageSource.defaultEncoding

• DynamicType.forVoid() / DynamicType.isVoid: a void type argument (ResponseEntity<void>), so a handler can ignore the value.

• AOP: a generated subclass proxy no longer advises the calls the bean makes on itself (Spring: [outer], was [outer, inner]): while one of its advised members runs (zone-aware for Future / FutureOr members), calls on the bean go straight to its code; AopContext.currentProxy() advises the one call made right after it

• AOP: @DeclareParents on subclass proxies (AopProxyFactory.subclass(introductions:), ProxyInvoker.notIntroduced; needs the matching spring_core_dart_generator)

• AOP: execution(...) return and parameter type patterns: qualified names (java.lang.String), Object+ (and num+, Iterable+, Pattern+), !Type, parenthesized && / || ((String || int)), type arguments with spaces; String||int without parentheses and Type+ of other types are errors with the reason

• AOP: new AnnotationPointcut marker for pointcuts that match by annotation (AnnotationMatchingPointcut and MethodValidationPostProcessor.pointcut are ones); the build keeps proxy pruning on for starters whose advisor beans use one

• SpEL on the web: integral doubles stay real through selection, projection, #this, @Introspected properties declared double, map entries SpEL built and new Double(2); 2.0.toString() is '2.0'; integer literals beyond 64 bits (99999999999999999999) fail with EL1035E there too

• SpEL: {2.0} == {2} is false like Java's List.equals (also maps and sets); T(Objects) (isNull, requireNonNull, hash, ...), T(System) (currentTimeMillis, nanoTime, getenv; getProperty gives its default), new StringBuilder() / StringBuffer (Dart's StringBuffer with Java's methods); a failed element write names the element type (String to int, was List<int>); new ExpressionState.activeContextObjectIsReal / scopeRootIsReal and real: on pushActive / pushScope / withThis

• SpEL: StandardEvaluationContext and SimpleEvaluationContext read the properties (and, withInstanceMethods(), the methods) of @Introspected classes of BeanIntrospector.shared by default

• JSON: enums without an EnumType at hand (readValue<Color>, readList, readMap, top-level values, Object? properties, map values and keys) use the one registered for the enum, so @JsonValue applies; introspections register the enums they use (new BeanIntrospector.registerEnum, enumTypeFor, enumTypeOf); an unknown enum is a clear error

• JSON: an unknown type id falls back to @JsonTypeInfo(defaultImpl:) like Jackson; @JsonValue on class properties, getters and methods (the object is written as that value, read back through a one-parameter constructor); @JsonProperty on enum constants; JsonProperty(name, access: JsonPropertyAccess.readOnly / writeOnly, required: true) (an empty name keeps the default one); reading a bounded generic class with type arguments is a clear error

• JSON: DeserializationFeature.failOnNullForPrimitives (ObjectMapper(failOnNullForPrimitives:), on like Jackson 3): off reads a JSON null or missing constructor value for a non-nullable int, double, num or bool as 0 / false; JsonNode.hashCode no longer depends on the key order

• validation: {jakarta.validation.constraints.X.message} resolves to Hibernate's default messages without a message source; \{, \}, \$ and \\ are literal characters in messages (also Constraint.interpolate)

• @Lookup([beanName]) (lookup method injection): every call of the method returns a bean of the container, by return type (findBean for a nullable type) or by name; an abstract @Component class with @Lookup methods is a bean; methods with parameters are not supported (needs the matching spring_core_dart_generator)

• beans: create may return null (a @Bean method declared T?): the bean is a NullBean, like Spring's: getBeanByName returns it, getBean<T>() and required injection points fail with NoSuchBeanDefinitionException, findBean<T>() and optional points get null, collections, getBeansOfType and providers leave it out, and it is neither post-processed, initialized nor destroyed; NullBean.orNull for inter-bean calls

• AOP: within(Type) / @within(A) match the class whose body runs (an inherited method is within its superclass, AspectJ's lexical scope); @target keeps the bean class; new MethodSignature.implementingTypes, implementingTypeAnnotations, implementingTypeAnnotationTypes (needs the matching spring_core_dart_generator)

• AOP: args(Type) tests the runtime argument (ExpressionPointcut(typeTests:), AspectMetadata.typeTests); @args(Annotation) / @args(name) (argumentAnnotations:); this(t) / target(t) bound to Object (or a type only the proxy has) are decided by the parameter's type check per call instead of never matching

• AOP: execution(public|protected|private ...) (protected: @protected members, MethodSignature.isProtected); a throws clause is rejected with the reason (Dart declares no exceptions)

• AOP: @Aspect('perthis(...)') / 'pertarget(...)' (AspectMetadata.perClause): one prototype aspect instance per proxy / target; a singleton per-instance aspect and percflow / pertypewithin fail with AopConfigException, as in Spring

• AOP: @DeclareParents(value, defaultImpl:) introductions: Introduction, AopProxyFactory(introductions:), ProxyInvoker.introduction(index); a registered declaring aspect proxies matching beans

• AOP: ComposablePointcut (union / intersection), pointcutMatchesBean; ProxyFactory / AspectJProxyFactory (forBean, addAdvice, addAdvisor, addAspect, getProxy)

• breaking: Advised has addAdvisor, removeAdvisor, addAdvice, removeAdvice (also on ProxyInvoker, whose advisors is a live view; ProxyInvoker.notAdvised for unadvised subclass proxies); Aspect takes an optional per-clause; AspectAdviceInterceptor.aspect is replaced by aspectFor(invocation) (new AspectAdviceInterceptor.forInvocation). Generated proxies need the matching spring_core_dart_generator

• breaking: JSON timestamps follow Jackson 3: writeDatesAsTimestamps writes epoch seconds with the fraction (1700000000.123456; milliseconds with writeDateTimestampsAsNanoseconds: false), integer timestamps read as seconds (readDateTimestampsAsNanoseconds), decimals always as seconds; durations have their own writeDurationsAsTimestamps (seconds)

• JSON reading: out-of-range integers fail (readValue<int>('1e20')) instead of saturating; a fraction into an int truncates (acceptFloatAsInt, Jackson's ACCEPT_FLOAT_AS_INT); "" is null for nullable scalars; date strings are parsed strictly and read in the mapper's time zone (UTC) when they have no offset; enum map keys use @JsonValue; enums also read by index; on the web infinities are written as strings

• JSON: generic @Introspected classes (GenericType<Page<Book>>), @JsonTypeInfo / @JsonSubTypes / @JsonTypeName, @JsonAlias, @JsonFormat, @JsonAnyGetter / @JsonAnySetter, @JsonUnwrapped, @JsonNaming, @JsonView (writerWithView / readerWithView), JsonInclusion.nonAbsent / nonDefault, the JsonNode tree model (readTree), JsonMapper.builder() / rebuild() with Jackson's feature enums

• container (Spring 7): a destroyed ApplicationListener bean leaves the multicaster (new removeApplicationListeners(predicate)); jakarta @Priority (package:spring_core_dart/jakarta.dart) in candidate selection (after primary, lowest value wins, a tie is a NoUniqueBeanDefinitionException) and ordering (after Ordered / @Order); SmartFactoryBean.supportsType / getObjectForType; ScopeNotActiveException (an inactive scope is missing for getIfAvailable / getIfUnique / ifAvailable); the default lifecycleProcessor singleton; ApplicationContextException when a lifecycle bean fails to start (was the bean's error); a dangling alias blocking a definition is a BeanDefinitionStoreException; DeferredImportSelector (after every module, by order); ConfigurationCondition / ConfigurationPhase (register-bean conditions of @Bean / @Configuration definitions are decided once everything is loaded)

• validation: DataBinder.allowedFields = [] allows every field (Spring: empty means all); invalid constraint attributes (Size(min: -1), min > max, negative Digits, a malformed DecimalMin / DecimalMax value or regex) throw ConstraintDeclarationException (new Constraint.checkParameters()); a built-in constraint on a value type it cannot check throws UnexpectedTypeException (new Constraint.supports(value))

• validation: @Valid on a Set reports lucky[].city; @GroupSequence on a class redefines its default group and BeanValidator(groupSequences:) declares sequence groups (validation stops at the first group with a violation; GroupDefinitionException for invalid sequences); @ConvertGroup; container element constraints @Each([...]) (iterable elements, map values) and @EachKey([...]) with Hibernate's paths (names[1].<list element>); ${validatedValue} in messages

• events: @EventListener methods are registered once the eager singletons exist, before the SmartInitializingSingleton callbacks (Spring's EventListenerMethodProcessor), so an event published from a @PostConstruct while a listener bean is being created no longer fails the refresh with BeanCurrentlyInCreationException; like Spring, such startup events do not reach @EventListener methods (ApplicationListener beans still get them)

• beans: SmartInitializingSingleton callbacks run in bean definition order (was creation order); new DefaultListableBeanFactory.addSingletonsInstantiatedCallback

• beans: @PostConstruct runs at the place of Spring's CommonAnnotationBeanPostProcessor (new, PriorityOrdered, order lowestPrecedence - 3, registered by the context): after the postProcessBeforeInitialization of the PriorityOrdered processors before it, before the Ordered and plain ones; afterPropertiesSet and init methods still run after all of them

• beans: InstantiationAwareBeanPostProcessor (postProcessBeforeInstantiation short-circuit, postProcessAfterInstantiation, postProcessProperties), SmartInstantiationAwareBeanPostProcessor.predictBeanType (answers getType) and MergedBeanDefinitionPostProcessor (postProcessMergedBeanDefinition once per definition, resetBeanDefinition when it is replaced or removed)

• context: each registerBean / BeanRegistry.registerBean call is its own definition source, so two beans of one name are an override (or BeanDefinitionOverrideException) instead of the second being dropped silently

• lifecycle: a SmartLifecycle bean asked to start while its stopWithCallback callback is still pending (restart(), start() right after stop()) is started when the callback fires instead of ending up stopped

• breaking: registerShutdownHook() closes with closeAsync() before ending the process, so asynchronous SmartLifecycle stops and @PreDestroy callbacks finish

• SpEL: arguments of registered functions, String / List / Map built-ins, T() static methods and constructors are converted to the parameter types through the context's TypeConverter (Spring's convertAllArguments): #half(3) with a double parameter, 'abc'.substring('1'), 'abc'.charAt(1.0), T(Math).max('1', 2); new VarargsFunction.convertArguments

• SpEL: booleans are comparable (true > false, Java's Boolean is Comparable); T(Math).rint rounds ties to even like Java; on the web real literals in inline lists, maps and arrays ({1.0, 2.0}[0] / 2, new double[]{1, 2}) stay real when indexed

• MessageFormat: {0,date} / {0,time} with Java's styles (short, medium by default, long, full, US English) and SimpleDateFormat patterns ({0,date,yyyy-MM-dd}); a date without a type is Java's short date-time (10/20/26, 9:05 AM, was ISO); malformed elements throw even when their argument is missing or of another type (unknown types, bad number / date / choice patterns, like applyPattern)

• programmatic registration like Spring 7: BeanRegistrar / BeanRegistry.registerBean<T>(supplier, name:, scope:, lazy:, primary:, fallback:, order:, description:, ...) (unnamed beans are T#0), ImportSelector (returns BeanModules) and ImportBeanDefinitionRegistrar, run while the modules load, through @Import (BeanModule.registrars, ImportDeclaration; needs the matching spring_core_dart_generator) or context.register(...); AnnotationConfigApplicationContext.registerBean<T>(...)

• breaking: ConfigurableApplicationContext.register takes an Object (a BeanModule, BeanRegistrar, ImportSelector or ImportBeanDefinitionRegistrar; anything else is an ArgumentError); registering after refresh() fails with a StateError naming the context and what to do

• asynchronous events: SimpleApplicationEventMulticaster(taskExecutor:) calls the listeners on a TaskExecutor (new TaskExecutor, SyncTaskExecutor, SimpleAsyncTaskExecutor); @Async([executor]) on @EventListener methods runs them on a TaskExecutor bean (switched on by having one, like @EnableAsync; EventListenerMethod(async:))

• breaking: EventListenerMethod.supports checks the event type only; the new shouldHandle checks the condition, inside the multicaster's error handling (Spring's ApplicationListenerMethodAdapter), so a failing condition reaches the errorHandler

• lifecycle: a created singleton that is a Lifecycle is started and stopped even when its declared type is not (Spring matches the singleton's instance)

• post-processors are created in Spring's phases (PriorityOrdered, Ordered, rest), each after the previous one ran, re-querying the names before each phase; a bean created while the BeanPostProcessors are registered is logged at info level, like Spring's BeanPostProcessorChecker

• EmbeddedValueResolverAware resolves #{...} SpEL after ${...} placeholders (Spring's EmbeddedValueResolver)

• beans: scoped proxies like Spring's ScopedProxyMode: @Scope('session', proxyMode: ScopedProxyMode.targetClass) (or interfaces) and BeanDefinition(scopedProxy:) inject one proxy that asks the scope for the current instance on every call (no warning for singletons holding it; no graph edge, so it breaks cycles); generated by spring_core_dart_generator from the @Lazy proxy class

• new package:spring_core_dart/jakarta.dart (kept out of the main library: the names clash with package:provider and the core Resource): JSR-330 Provider<T> injection points get the lazy provider (ObjectProvider implements Provider, get()), and JSR-250 @Resource on fields and setters injects by bean name (the member name falling back to the type, or exactly name:), like Spring's CommonAnnotationBeanPostProcessor; DependencyResolver.resource / optionalResource, Dependency.resource

• breaking: DependencyKind has resource, Dependency has fallbackToType; ObjectProvider has get(); DependencyResolver has resource() / optionalResource()

• beans: a collection injection point whose only candidates are the configuration's own @Bean products gets them (Spring's final self-reference pass), never the configuration itself; before it got none

• beans: FactoryBean.objectType (Spring's getObjectType(), T by default): a FactoryBean given to registerSingleton is found by its product type (getBean<T>(), getBeanNamesForType, isTypeMatch, getType)

• context.pause() / pauseAsync() / restart() with ContextPausedEvent (a ContextStoppedEvent) and ContextRestartedEvent (a ContextStartedEvent) and SmartLifecycle.isPauseable (default true), like Spring 7: pause stops the running lifecycle beans except non-pauseable smart ones, restart stops the pauseable ones if running and starts the auto-startup beans again

• breaking: LifecycleProcessor has onPause(), onPauseAsync() and onRestart(); ConfigurableApplicationContext has pause(), pauseAsync(), restart() and registerShutdownHook()

• context.registerShutdownHook(): SIGINT / SIGTERM close the context and end the process with 130 / 143 (once per context, released on close, a no-op without dart:io), like Spring's registerShutdownHook()

• template hooks on AnnotationConfigApplicationContext, like Spring's: postProcessBeanFactory(beanFactory) after the modules are loaded, onRefresh() before the listeners and eager singletons, onClose() last in close() / closeAsync()

• breaking: ApplicationEventPublisher.publishEvent is generic (publishEvent<T extends Object>(T event)); a payload is wrapped in a PayloadApplicationEvent<T> of its static type (was PayloadApplicationEvent<Object>), so listeners of PayloadApplicationEvent<T> receive it; new EventListenerMethod.forPayload<B, P> matches on the payload's runtime type (used by the generator); PayloadApplicationEvent takes an optional timestamp

• events: @EventListener methods of a FactoryBean are invoked on the factory (&name), not on its product

• breaking: ConditionContext has definition, the BeanDefinition whose conditions are evaluated (Spring's AnnotatedTypeMetadata; null for @PropertySource conditions)

• breaking: a child context's messageSource falls back to the parent's message source instead of the parent context (Spring's getInternalParentMessageSource); a conversionService bean of an ancestor context is used for @Value conversion when the child has none

• AOP: a pointcut syntax error (FormatException) carries the character position (offset) of the designator or token at fault

• @Autowired(required: false) on constructors: several such constructors are candidates and the one with the most parameters whose beans exist is used, like Spring (needs the matching spring_core_dart_generator)

• config data: placeholders in a file's spring.config.import and on-profile guard resolve against the command line and environment before the file's own values (Boot's contributor order); an unresolvable placeholder in an optional: import skips it instead of failing

• config data: lists bind like Boot's binder: indexed keys from every source (SPRING_PROFILES_INCLUDE_0_), and the highest source with a list wins whole (--spring.profiles.active[0]=x replaces a file's list instead of merging item by item)

• config data: a non-optional wildcard location (file:./config/*/) without subdirectories fails with ConfigDataLocationNotFoundException (contains no subdirectories), like Boot; the exception has an optional reason

• RandomValuePropertySource (${random.int}, random.int(10), random.int[5,10], random.long, random.uuid, random.value), like Boot's

• breaking: PropertySourceLoader is an abstract class with an encoding (UTF-8 by default): implement it with extends; PropertiesPropertySourceLoader(encoding: latin1) reads ISO-8859-1 config files

• breaking: PropertySourceFactory.createPropertySource takes an EncodedResource (new, like Spring's) instead of a Resource; @PropertySource(encoding: 'ISO-8859-1') / PropertySourceDeclaration.encoding / processPropertySource(encoding:); PropertiesLoaderUtils and ResourcePropertySource take an encoding

• async @PropertySource: refreshAsync() reads async-only resources (Flutter assets behind a ProtocolResolver) first through the new PropertySourceProcessor.preload; a synchronous refresh names the problem instead of failing in the factory

• resources: package: URIs resolve to the package's files (VM with a package config); file: URLs are percent-decoded (FileSystemResource.fromFileUrl); FileSystemResource of a directory exists but is not readable (isDirectory), like Spring's

• breaking: PathMatchingResourcePatternResolver follows Spring for classpath patterns: classpath*: (new) searches every classpath root and resolves non-patterns in each, classpath: patterns search only the first root with the base directory (was: every root); matching directories are returned and the walk skips directories the pattern cannot match; ClasspathResources.resolveEmbedded

• AntPathMatcher.extractUriTemplateVariables no longer fails on paths where a ** search backtracks (a failed attempt left its variables behind)

• placeholders follow Spring 6.2's parser: ${a:b} is first looked up as the key a:b; an unclosed ${ is text and later placeholders still resolve (${a ${b})

• SpEL: Java's int/double semantics also on the web: real values are tracked through literals, operators, ?:, ternaries, assignments and T(Math) / T(Double) functions (7.0 / 2 is 3.5, 'x' + 7.0 is x7.0)

• breaking: SpEL ^ on integers follows Spring 7's OpPower (a long above Integer.MAX_VALUE, else an int cast that saturates at Integer.MIN_VALUE: (-2) ^ 33 is -2147483648); == on numbers uses Java's double semantics (NaN != NaN, 0.0 == -0.0); integer / 0 and % 0 throw UnsupportedError('/ by zero') on the VM and the web

• breaking: SpEL selection .?[...] on a list or set returns a list with the source's element type (List<int> from a List<int>), not List<Object?>

• SpEL: T(Character) / char (new char[2]), new Integer(5) / Long / Double / Boolean, T(String).format and '...'.formatted(...) (Java's format syntax), getBytes(), chars(), List.removeAll / retainAll / sort(null)

• config data: profile groups expand depth-first like Boot's Profiles (a listed member moves right after its group); spring.config.on-not-found=ignore; extension hints (file:./conf[.yml]); configtree: imports (ConfigDataEnvironment.configTreePrefix); a location without a known extension (such as a directory without a trailing /) fails with Boot's message

• breaking: ConfigurationPropertyName rejects a..b and a.[0] (empty elements), like Boot

• @PropertySource files are added above defaultProperties, which stays the last source (Boot's PropertySourceOrderingBeanFactoryPostProcessor)

• ReloadableResourceBundleMessageSource.cacheMillis (Spring's setCacheMillis); cacheSeconds is stored in it

• conditions: ConditionEvaluation / ConditionEvaluationRecorder; AnnotationConfigApplicationContext.conditionEvaluations lists every condition outcome of the last refresh (for Boot's condition evaluation report)

• breaking: ConversionService.canConvertType<S>(Type) (Spring's canConvert(Class, Class)); num → int truncates like Spring's NumberUtils (1.9 is 1; NaN and infinity fail), so SpEL list[1.5] is list[1]

• DataSize / DataUnit (Spring's, 10MB, 512KB) with conversions from strings and ints; ChronoUnit and DurationStyle.parse(unit:) for numbers without a unit

0.1.7

• @ComponentScan(includeFilters:, excludeFilters:, useDefaultFilters:, lazyInit:) with Filter / FilterType (annotation, assignableType, regex), like Spring's @ComponentScan.Filter; read by the generator at build time (needs the matching spring_core_dart_generator)
• AOP: ExpressionPointcut rejects a binding the expression never uses (an advice parameter the pointcut does not bind), like AspectJ's "formal unbound in pointcut", instead of passing null to the advice
• refreshAsync() / closeAsync() on the context (and ApplicationContext.runAsync): @PostConstruct, afterPropertiesSet, init methods, @PreDestroy, DisposableBean.destroy and destroy methods may return a Future, awaited there (each bean's callbacks in order, the bean injectable meanwhile; refresh() fails for an asynchronous init callback, close() logs an asynchronous destroy callback and goes on); closeAsync() waits for SmartLifecycle.stopWithCallback per phase, at most DefaultLifecycleProcessor.timeoutPerShutdownPhase (10 s) / timeoutsForShutdownPhases, logging the beans still running, like Spring
• breaking: InitializingBean.afterPropertiesSet and DisposableBean.destroy return FutureOr<void> (a void override still compiles); BeanDefinition init/destroy callbacks are FutureOr<void> Function(T); LifecycleProcessor has onCloseAsync(); ConfigurableListableBeanFactory has preInstantiateSingletonsAsync() / destroySingletonsAsync()
• lifecycle: a bean's dependencies start before it and its dependents stop before it, whatever the phase (Spring's doStart / doStop); a plain Lifecycle dependency of an auto-startup bean starts at refresh; a failed refresh stops the beans started so far
• events: GenericApplicationListener beans (also behind another declared type) and listener objects given to registerSingleton receive events (Spring's ApplicationListenerDetector; a non-singleton one is warned about), each registered once; new SmartApplicationListener mixin; a Future-returning @EventListener publishes its value when it completes and routes an error to the multicaster's error handler (else logs it)
• breaking: early events are replayed when the listeners are registered (after the bean factory post-processors), like Spring's registerListeners, and events published while the singletons are created reach the listeners right away (a listener bean may be created early for it); they arrived after all eager singletons before
• breaking: validateBeanGraph() (so refresh()) reports a missing or ambiguous dependency as an UnsatisfiedDependencyException naming the bean and the injection point, with the NoSuchBeanDefinitionException / NoUniqueBeanDefinitionException as its cause, like a failure while the bean is created; missing dependsOn beans and cycles are reported as before
• beans: an injection point that fails while its bean is created (no bean, several candidates, a dependency that fails to create) is an UnsatisfiedDependencyException with the bean, the point (Greeter 'greeter', collection of Greeter('x')) and the lookup error or the nested bean's failure as cause
• beans: aliases from registerAlias match @Qualifier and parameter names; autowireCandidate: false beans are excluded from qualified injection too but still found by getBean (by name, or as the only bean of their type)
• beans: Set and Map injection keep registration order (only lists are sorted); an @Order on a @Bean method beats the bean's Ordered.order, an @Order on its class does not
• config data: spring.config.import from the command line / SPRING_CONFIG_IMPORT (above every location); directory imports (file:./config/ loads application* files); imported files get their -{profile} variants; new ConfigDataLocationNotFoundException
• breaking: a non-optional directory location that does not exist (spring.config.location, spring.config.import) fails like Boot's ConfigDataLocationNotFoundException; an existing directory without config files is fine
• breaking: profiles follow Boot's Profiles rules: programmatic active profiles are kept and merged with a file's spring.profiles.active (they replaced it before); spring.profiles.include is collected from the highest-precedence source first; spring.profiles.default from config files, the command line or the environment selects the profile-specific files (groups expanded) and is set on the environment; ConfigDataEnvironment(additionalProfiles:) adds profiles first
• config data: a defaultProperties source (ConfigDataEnvironment.defaultPropertiesSourceName) stays below the config files, as in Boot
• @Value to Resource goes through the context's resource loader (protocol resolvers, asset loaders), like Spring's ResourceEditor: DefaultListableBeanFactory.resourceLoader, set by the context
• SpEL limits like Spring 7: SpelParserConfiguration.builder() with maximumExpressionLength (10 000), maximumNestingDepth (1000), maximumOperations (10 000 per evaluation, SpelMessage.maxOperationsExceeded, default from -Dspring.expression.maxOperations), autoGrowNullReferences / autoGrowCollections / maximumAutoGrowSize; 'x' * n over 256 characters, string + over 100 000 characters and matches patterns over 1000 characters or with nested quantifiers ((a+)+, SpelMessage.flawedPattern) are errors
• SpEL in @Value: systemEnvironment, systemProperties (the --key=value command-line arguments of the environment bean, as Dart has no system properties), environment['a.b'], environment.getProperty('a.b', 'default') and the other Environment methods; the factory's ConversionService converts (looked up at each conversion through StandardTypeConverter.lazy, Spring's supplier constructor), parsed expressions are cached per resolver, -Dspring.context.expression.maxLength sets the @Value length limit
• breaking: SpEL exceptions follow Spring: ExpressionException → ParseException / EvaluationException → SpelParseException / SpelEvaluationException with messageCode, simpleMessage (EL1070E: ...), position and the expression (message is Expression [1 + * 2] @4: EL1070E: ...); accessors and resolvers report failures with AccessException; an exception thrown by a user method or constructor propagates unwrapped; safe navigation is Spring 6.2's (a null before a ?. step ends the whole chain, also for ?.[i], ?.?[], ?.![], ?.^[], ?.$[])
• breaking: @Configuration({name, proxyBeanMethods = true}) (the name is a named argument now): full mode by default, the generated subclass makes inter-bean @Bean method calls return the container's beans; proxyBeanMethods: false keeps the methods as written (needs the matching spring_core_dart_generator)
• config data: YAML out of the box (YamlPropertySourceLoader on package:yaml, flattened like Boot: a.b, a.hosts[0], a.servers[0].name, ~ / empty as ''); application.yml / .yaml, profile variants, --- documents and YAML lists for spring.config.import, spring.profiles.include / active / group.* and on-profile; invalid files fail with a ConfigDataLoadException
• breaking: config locations come in Boot's groups (, separates groups, ; joins locations into one); defaultSearchLocations is optional:classpath:/;optional:classpath:/config/ and optional:file:./;optional:file:./config/;optional:file:./config/*/, so external non-profile files beat packaged profile files; ConfigDataEnvironment(defaultLocations:) entries are groups
• breaking: in one location .properties beats .yml / .yaml (an earlier loader's files win, like Boot's; they lost before)
• config data: */ wildcard locations (file:./config/*/, file:./etc/*/app.properties): each subdirectory in alphabetical order, ..x ones skipped; classpath wildcards are rejected
• relaxed names like Boot's attached ConfigurationPropertySources (attached by ConfigDataEnvironment): getProperty('app.read-timeout'), ${app.read-timeout} and @Value find app.readTimeout, app.read_timeout, APP_READTIMEOUT, APP_HOSTS_0_; precedence decides, not the form. New ConfigurationPropertyName; breaking: the environment's first property source is now configurationProperties
• AOP: Type+ subtype patterns in within / execution, @target, this, args(...); bean() also matches aliases and qualifier values
• AOP: named pointcuts resolved per aspect (orders() in its own aspect, AuditAspect.orders() for another's)
• AOP: aspects ordered by Ordered as well as @Order; plain Advisor beans; aspects and advisors of parent contexts apply
• AOP: AopContext.currentProxy(); the auto proxy creator runs first among ordered post-processors (later post-processors see the proxy)
• AOP: JoinPoint.args is a copy, proceed(args) checks the argument count; async non-around advice is awaited on Future methods and rejected on synchronous ones
• AOP runtime: advice binding (@annotation(timed), args(id, ..), @AfterReturning(returning:), @AfterThrowing(throwing:)) and subclass proxies (AopProxyFactory.subclass); the generator does not emit them yet
• breaking: @PastDate, @PastOrPresentDate, @FutureOrPresentDate are renamed to Jakarta's @Past, @PastOrPresent, @FutureOrPresent (@FutureDate stays: @Future clashes with Dart's Future)
• validation: DecimalMin / DecimalMax, BigInt and numeric strings in number constraints, @Digits like BigDecimal, Hibernate's @Email, @NotBlank trimming like Java, @Pattern flags, date-only values and an injectable clock (ClockProvider)
• validation: method validation (@Validated, MethodValidationPostProcessor, ConstraintViolationException); class-level violations on a property; {key} messages from a MessageSource; shared @Valid objects validated on every path
• binding: no constraint error on top of a binding failure; DataBinder.construct (constructor binding); collection auto-grow and element/key conversion in BeanWrapper; full DefaultMessageCodesResolver codes and Spring's error arguments
• messages: the parent MessageSource gets resolved arguments; locales with a script (zh_Hant_TW); basename-by-basename lookup; MessageFormat details (quotes, lone }, negative subpatterns, HALF_EVEN, locale symbols)
• beans: failed destroy callbacks are logged by spring_core_dart.beans.factory.support.DisposableBeanAdapter (Spring's logger name)
• breaking: DefaultLifecycleProcessor takes a ConfigurableListableBeanFactory and, like Spring, does not create lazy plain Lifecycle beans (only created singletons and SmartLifecycle beans are started and stopped)
• breaking: SmartLifecycle is an abstract mixin class with Spring's defaults (isAutoStartup true, phase SmartLifecycle.defaultPhase) and stopWithCallback(callback) (Spring's stop(Runnable)), which the lifecycle processor calls; classes that implements SmartLifecycle must add stopWithCallback or use with SmartLifecycle
• breaking: isActive is true from the start of refresh() until close() finishes; close() from a ContextRefreshedEvent listener closes the context
• breaking: @EventListener methods and addListener / ApplicationListener typed Object (or another non-ApplicationEvent type) receive the payload of a PayloadApplicationEvent, not the wrapper; an ApplicationListener bean that is Ordered is ordered by its order
• breaking: publishEvent before refresh() or after a failed refresh no longer throws: the event is only forwarded to the parent (Spring 7)
• breaking: the default context id is unique (AnnotationConfigApplicationContext@1b2c3d, like Spring's ObjectUtils.identityToString) instead of application; an explicit id is kept
• breaking: PropertiesMessageSource is renamed ReloadableResourceBundleMessageSource; cacheMessages is replaced by Spring's cacheSeconds (-1 forever, 0 checks on every lookup, n at most every n seconds; changed files are re-read) and it gets fallbackToSystemLocale (default true: without a defaultLocale, Locales.systemLocale is tried)
• breaking: AbstractMessageSource.fallbackToDefaultLocale is removed (an empty defaultLocale means no fallback); subclasses can override fallbackLocale
• messages: MessageSourceAccessor; Locales.systemLocale (the platform locale, settable like Locale.setDefault)
• config data: profile names are validated like Boot 3.5+ (letters, digits, -_.+@, starting and ending with a letter or digit; spring.profiles.validate=false turns it off); the legacy spring.profiles key is rejected (InvalidConfigDataPropertyException); an empty spring.config.activate.on-profile is no guard; locations without a prefix are files (Boot's LocationResourceLoader)
• SimpleCommandLinePropertySource: a lone -- ends the options (later arguments are non-option arguments) instead of throwing
• breaking: containsProperty on an environment / PropertySourcesPropertyResolver is true for a key with a null or empty value, like Spring
• breaking: converting a list or set to String gives a,b (Spring's CollectionToStringConverter) and a Duration gives ISO-8601 PT1H30M (Boot's DurationToStringConverter; DurationStyle.formatIso); ISO durations accept negative parts (P-1D)
• enums convert leniently like Boot (my-value, MY_VALUE and myValue all bind to myValue) in addEnum and constructor binding
• MethodValidationPostProcessor takes exclude filters on the class annotations (Boot's MethodValidationExcludeFilter)
• breaking: plain resource locations (app.properties, /x.txt) are classpath resources (lib/resources/), like Spring's getResourceByPath, in DefaultResourceLoader, PathMatchingResourcePatternResolver (which now expands classpath patterns) and contexts; use file: for the file system
• breaking: SpEL SimpleEvaluationContext rejects variable assignment in expressions (#v = 5, #v++) with SpelMessage.variableAssignmentNotSupported ("Assignment to variable '#v' is not supported"), through the new EvaluationContext.assignVariable (custom EvaluationContext implementations must add it); setVariable from Dart still works
• breaking: SpEL selection criteria must be booleans (SpelMessage.resultOfSelectionCriteriaIsNotBoolean, no conversion), and first/last selection on a map with no match is null instead of {}
• SpEL: enums of the same type compare by index (Java ordinal); + with a String converts the other operand with the context's TypeConverter ('a' + {1,2} is a1,2)
• breaking: JSON: local DateTimes are written with their offset (2026-01-01T12:00:00.000+02:00, like Jackson's OffsetDateTime) instead of none; ObjectMapper(timeZone:) (UTC or a fixed offset) writes dates in that offset
• breaking: JSON naming strategies translate like Jackson: snakeCase / upperSnakeCase keep acronyms together (myURLValue → my_urlvalue), upperCamelCase only capitalizes the first letter (MyURLValue), lowerCase lowercases the name as it is
• JSON: NaN and infinities are written as "NaN", "Infinity", "-Infinity" (Jackson's default) instead of throwing; readValue<Map<String, dynamic>> / readValue<List<dynamic>> without a type return the decoded JSON
• breaking: ObjectMapper writes the properties of an object sorted by JSON name, the constructor parameters first (Jackson 3's / Spring Boot 4's SORT_PROPERTIES_ALPHABETICALLY and SORT_CREATOR_PROPERTIES_FIRST), not in declaration order; ObjectMapper(sortPropertiesAlphabetically: false) brings the old order back
• @JsonPropertyOrder(['id', 'title']) and @JsonPropertyOrder.alphabetic(): listed properties first (JSON or Dart names), the rest in the mapper's order

0.1.6

• update road map
• ci: release with a button on main, skip new packages when publishing; shorter pubspec descriptions

0.1.5

• add feign runner + web socket runner
• add web core + faign starter for http calling

0.1.4

• feat: ObjectMapper in core — JSON on generated metadata (@Introspected, @JsonProperty/@JsonIgnore/@JsonInclude/@JsonCreator/@JsonValue), spring.jackson.* in Boot

0.1.3

• add scheduling + cache starters
• fix extension add aop docs

0.1.2

• ci: release only from the release branch; fix version-dependent test; Node 24 actions
• fix tests

0.1.1

• ClasspathResources.registerAll(owner:): a module registering again (after a hot reload) replaces its own embedded files; BeanModule passes its name.
• Example guide on pub.dev (example/README.md): every feature in short blocks with the annotations to write.

0.1.0

• Advised members are aopTarget and aopAdvisors (were targetObject and advisors), so domain methods named advisors can be proxied.
• AopProxyFactory.unavailable and AopConfigException: advice that matches a bean the generator could not proxy fails the startup with the reason instead of being skipped silently.
• DataBinder.bind: malformed keys (items[, a..b) are skipped like unknown fields (InvalidPropertyException when ignoreUnknownFields is off); setters that throw become methodInvocation field errors (MethodInvocationException), and binding continues.
• Config data: spring.profiles.include profiles come before the active ones, so application-{active} files override included profile files, as in Spring Boot.
• @Lazy on injection points (constructor parameters, fields, setters): a generated lazy proxy resolves the bean on every call, on behalf of the injecting bean (self-exclusion still applies). Breaks cycles and allows self-injection through the AOP proxy. Dependency.lazy is validated at refresh like a single dependency but is not an edge of the cycle check; DependencyResolver.lazyDependency.
• Lookups are cached per requester once the factory is frozen.
• ClasspathResources.addDirectory: directories searched before the embedded lib/resources/ files (the test classpath).
• SpringLog is the logging facade of the family: per-logger levels inherited by dots (setLevel, levelOf), lazy messages (log.debug(() => ...)), structured fields, zone-scoped context (SpringLog.withFields, like MDC), listen for extra listeners, and records with time and sequence. parseSpringLogLevel reads property values.
• A bean is no longer injected into itself: @Primary composites and decorators receive the other beans of their type (Spring's self-reference rule).
• @PropertySource declarations carry the declaring class's conditions and are loaded only when they match.
• Config data: documents guarded by spring.config.activate.on-profile (including negated guards such as !prod) are evaluated only once the profiles are known; relative import cycles terminate.
• close() is exception-safe and re-entrant like Spring's doClose: a failing ContextClosedEvent listener or lifecycle bean is logged and the shutdown continues.
• Events published during refresh() reach the parent context once.
• Bean Validation messages are shown as written (no MessageFormat mangling of can't or [A-Z]{2,3}) unless they contain {0} placeholders; invalid MessageFormat patterns are returned raw.
• DataBinder canonicalizes property names (roles['admin'] → roles[admin]) and matches disallowedFields case-insensitively, also against dotted map access.
• AOP: @annotation / @within match generated annotation names, so they work in minified and obfuscated release builds; package-qualified wildcards and argument binding are rejected instead of matching every or no bean.
• ConditionGroup: a configuration class's conditions are evaluated once for the class, its @Bean methods and property sources (all or nothing).
• Type index like Spring's allBeanNamesByType (cleared when definitions change) and a cache of resolved lookups once the configuration is frozen: getBean<T>() no longer scans every definition (~0.1 µs regardless of the number of beans).
• New SpringLog logger for problems the framework recovers from.
• classpath: resources: files of lib/resources/ embedded by the generator (BeanModule.resources, ClasspathResources), read from disk as a fallback; config data looks in classpath:/ and classpath:/config/ first; @Value('classpath:...') Resource injection.

Initial release.

• IoC container: ApplicationContext, DefaultListableBeanFactory, bean definitions, singleton / prototype / custom scopes, lazy beans, @Primary / @Fallback / @Qualifier, collection and ObjectProvider injection, FactoryBean, aware and lifecycle callbacks, bean (factory) post-processors, Lifecycle / SmartLifecycle, parent contexts, bean graph validation at refresh.
• Annotations for spring_core_dart_generator: stereotypes, @Configuration / @Bean, @Autowired, @Value, @PostConstruct / @PreDestroy, @Profile, @Conditional, @Import, @PropertySource, @EventListener, @Configurable, @Introspected, AOP annotations.
• Environment: property sources, ${...} placeholders, profiles and profile expressions, command-line arguments, application.properties config data with profile files, multi-document files and imports.
• Type conversion, resources and AntPathMatcher, .properties parser.
• Events, MessageSource with MessageFormat.
• SpEL: parser, evaluation contexts, templates, #{...} in @Value.
• Validation and data binding: constraints, BeanValidator, DataBinder, Spring message codes.
• AOP: aspects, advice, pointcut expressions, advisors, generated proxies.