[2201.12.x] Include only the type name in the Type object for visibleVariableTypes API variable types

[LakshanWeerasinghe]

Purpose

$subject

Fixes OOM occurs when trying to return a value using BI

The visibleVariableTypes API is used in the expression editor's helper pane, where we display visible variable symbols grouped under different categories. Currently, this helper pane only uses the Type object to show the type name alongside each variable.

However, the existing implementation of the Type object includes additional type information, which is unnecessary for this use case and can lead to performance issues, as noted in this comment.

With this PR, we simplify the response by including only the type name in the Type object associated with each variable.

Screen.Recording.2025-05-21.at.14.43.39.mov

[Copilot]

Pull Request Overview

This PR streamlines the visibleVariableTypes API response by including only the variable’s type name and signature, improving performance and removing unnecessary type details.

• Updated JSON fixtures to drop deep type info (fields, restType, typeInfo) and add a simple "name" alongside "typeName".
• Modified VisibleVariableTypesGenerator to use a new fromTypeSymbol helper that sets only typeName and name.
• Added type-symbol imports and helper methods; replaced old Type.fromSemanticSymbol calls.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

File	Description
modules/flow-model-generator-ls-extension/src/test/resources/visible_variable_types/config/*.json	Removed complex type structures and added "name" fields
modules/flow-model-generator-core/src/main/java/io/ballerina/flowmodelgenerator/core/VisibleVariableTypesGenerator.java	Introduced fromTypeSymbol/getTypeName helpers and updated imports

Comments suppressed due to low confidence (1)

flow-model-generator/modules/flow-model-generator-core/src/main/java/io/ballerina/flowmodelgenerator/core/VisibleVariableTypesGenerator.java:31

• The Qualifier import is no longer used in this file. Consider removing it to clean up unused dependencies.

import io.ballerina.compiler.api.symbols.Qualifier;