[Fix #1283] Async Java Function Call executor

[fjtirado]

Fix #1283

[Copilot]

Pull request overview

Fixes issue #1283 by improving the Java function call execution path to correctly support async returns (e.g., CompletableFuture) and explicit output type conversion.

Changes:

• Refactors CallJava tasks to carry optional input/output class metadata and introduces an abstract base for Java functions.
• Updates Java call executors/builders to use typed generics, optional output conversion, and async execution behavior.
• Moves/renames reflection-related functional interfaces/utilities and consolidates/adjusts tests (adds async call test, moves Jackson event filtering test).

Reviewed changes

Copilot reviewed 34 out of 34 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
impl/core/src/main/java/io/serverlessworkflow/impl/events/DefaultCloudEventPredicate.java	Adjusts envelope predicate extraction/removal from additional properties.
experimental/types/src/main/java/io/serverlessworkflow/api/types/func/CallJava.java	Adds generics + input/output class metadata and refactors function task hierarchy.
experimental/test/src/test/java/io/serverlessworkflow/fluent/test/Review.java	Replaced a test record with a new abstract function base class (currently in test sources).
experimental/test/src/test/java/io/serverlessworkflow/fluent/test/JacksonEventFilteringTest.java	Removes standalone Jackson event filtering test (moved/merged elsewhere).
experimental/test/src/test/java/io/serverlessworkflow/fluent/test/FuncEventFilterTest.java	Expands event filter tests and inlines Jackson conversion test + domain records.
experimental/test/src/test/java/io/serverlessworkflow/fluent/test/FuncCallAsyncTest.java	Adds coverage for async/sync/lambda Java function calls.
experimental/lambda/src/test/java/io/serverless/workflow/impl/executors/func/StringBuilder2String.java	Adds converter targetType() to support target-driven conversion.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaLoopFunctionIndexCallExecutor.java	Fixes executor generics to return typed result.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaLoopFunctionCallExecutor.java	Fixes executor generics to return typed result.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaFunctionCallExecutorBuilder.java	Plumbs output class into executor construction.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaFunctionCallExecutor.java	Updates executor to support typed return + output class conversion.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaFilterFunctionCallExecutorBuilder.java	Plumbs output class into executor construction.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaFilterFunctionCallExecutor.java	Updates executor to support typed return + output class conversion.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaContextFunctionCallExecutorBuilder.java	Plumbs output class into executor construction.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/JavaContextFunctionCallExecutor.java	Updates executor to support typed return + output class conversion.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/DataTypeConverterRegistry.java	Tightens registry API to Class<?>.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/DataTypeConverter.java	Adds targetType() to support target-directed conversions.
experimental/lambda/src/main/java/io/serverlessworkflow/impl/executors/func/AbstractJavaCallExecutor.java	Adds output type conversion + async execution handling logic.
experimental/fluent/func/src/test/java/io/serverlessworkflow/fluent/func/FuncDSLUniqueIdTest.java	Updates imports after moving UniqueIdBiFunction.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/UniqueIdBiFunction.java	Changes package to io.serverlessworkflow.api.reflection.func.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/Step.java	Updates imports to new reflection function packages.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/SerializablePredicate.java	Changes package to io.serverlessworkflow.api.reflection.func.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/SerializableFunction.java	Changes package to io.serverlessworkflow.api.reflection.func.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/SerializableConsumer.java	Changes package to io.serverlessworkflow.api.reflection.func.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/ReflectionUtils.java	Makes reflection utilities public and adds result type inference.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/InstanceIdFunction.java	Changes package to io.serverlessworkflow.api.reflection.func.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/FuncEventFilterSpec.java	Updates imports to new SerializablePredicate location.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/FuncEmitSpec.java	Updates imports to new reflection utilities and serializable function.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/FuncDSL.java	Adds output type inference and overloads that accept explicit output classes.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/FuncCallStep.java	Stores return class and forwards it into call task builder configuration.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/dsl/CommonFuncOps.java	Updates imports to new reflection utilities/functions.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/FuncForkTaskBuilder.java	Adds branch overload supporting explicit output class.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/FuncEmitEventPropertiesBuilder.java	Updates import to new SerializableFunction package.
experimental/fluent/func/src/main/java/io/serverlessworkflow/fluent/func/FuncCallTaskBuilder.java	Adds overloads to pass optional output class into CallJava.

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[gmunozfe]

Looks good to me, great work @fjtirado

[Copilot]

Pull request overview

Copilot reviewed 34 out of 34 changed files in this pull request and generated 2 comments.

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