[1.2.x] Support for missing primitive types in data mapper model

[KavinduZoysa]

Purpose

$title.

[Copilot]

Pull Request Overview

This PR adds support for missing primitive types in the data mapper model, specifically handling specialized integer types (signed/unsigned 8/16/32-bit), byte, string:Char, and regexp types that were previously unsupported.

Key Changes:

• Refactored primitive type handling to use a centralized mapping function
• Added support for INT_SIGNED8/16/32, INT_UNSIGNED8/16/32, BYTE, STRING_CHAR, and REGEXP type kinds
• Added test case to verify int:Signed32 type handling in data mapper

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
ReferenceType.java	Refactored primitive type detection and added support for missing primitive types including specialized integer types, byte, string:Char, and regexp
variable33.bal	Added test source file demonstrating PurchaseDetails record with int:Signed32 field type
variable55.json	Added test configuration file verifying int:Signed32 type appears correctly in data mapper model
DataMappingModelTest.java	Added new test case reference for variable55.json to test suite

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[Copilot]

[nitpick] The switch statement uses block syntax unnecessarily. Consider using simplified arrow syntax (e.g., case INT -> \"int\";) to reduce verbosity and improve readability, as each case only returns a single value.

Suggested change

	case INT -> {
	return "int";
	}
	case INT_SIGNED8 -> {
	return "int:Signed8";
	}
	case INT_SIGNED16 -> {
	return "int:Signed16";
	}
	case INT_SIGNED32 -> {
	return "int:Signed32";
	}
	case INT_UNSIGNED8 -> {
	return "int:Unsigned8";
	}
	case INT_UNSIGNED16 -> {
	return "int:Unsigned16";
	}
	case INT_UNSIGNED32 -> {
	return "int:Unsigned32";
	}
	case STRING -> {
	return "string";
	}
	case FLOAT -> {
	return "float";
	}
	case BOOLEAN -> {
	return "boolean";
	}
	case NIL -> {
	return "()";
	}
	case DECIMAL -> {
	return "decimal";
	}
	case BYTE -> {
	return "byte";
	}
	case STRING_CHAR -> {
	return "string:Char";
	}
	case NEVER -> {
	return "never";
	}
	default -> {
	return null;
	}
	case INT -> "int";
	case INT_SIGNED8 -> "int:Signed8";
	case INT_SIGNED16 -> "int:Signed16";
	case INT_SIGNED32 -> "int:Signed32";
	case INT_UNSIGNED8 -> "int:Unsigned8";
	case INT_UNSIGNED16 -> "int:Unsigned16";
	case INT_UNSIGNED32 -> "int:Unsigned32";
	case STRING -> "string";
	case FLOAT -> "float";
	case BOOLEAN -> "boolean";
	case NIL -> "()";
	case DECIMAL -> "decimal";
	case BYTE -> "byte";
	case STRING_CHAR -> "string:Char";
	case NEVER -> "never";
	default -> null;