Role Extensions in Programming Languages for Secure Type Sharing
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Solution Overview
Problem
Existing programming languages face challenges in efficiently managing inheritance, leading to increased program complexity, difficulty in maintenance and extensibility, and security vulnerabilities due to overreliance on inheritance, which can result in unnecessary code proliferation and insecure access to object data.
Innovation Solution
Implementing role-scope extensions (RSE and RSEE) in programming languages, where independent and dependent-link objects are maintained separately, allowing for secure and efficient access to extended data types and elements, with compile-time validation to ensure proper scope and access restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If inheritance is used to share features between related types, then code reuse is improved, but program complexity and maintenance difficulty increase
Solution Approach 1:
The patent divides the inheritance model into independent types and role-specific extensions. Each type is segmented into a base independent type and optional role extensions, allowing features to be shared without creating complex inheritance hierarchies. Role extensions are separate modules that can be attached independently, reducing the coupling and complexity inherent in traditional inheritance systems.
Solution Approach 2:
The patent introduces a new dimension to type organization by separating the conceptual type definition (independent type) from the role-specific implementation (role extensions). This dimensional separation allows features to be shared across roles without creating traditional inheritance chains, transforming the complexity management approach from vertical inheritance to horizontal feature composition.
2Adaptability or versatility
If traditional inheritance is used, then feature sharing is improved, but security vulnerabilities arise due to overreliance on inheritance
Solution Approach 1:
The patent segments access control by separating independent types from role extensions. Each role extension can define its own access rules independently, preventing the security vulnerabilities that arise in traditional inheritance where child classes inherit all parent access rights. This segmentation allows fine-grained control over which features are accessible to which roles.
Solution Approach 2:
The patent introduces role extensions as intermediary components between independent types and accessing code. Role extensions act as mediators that control access to features, preventing direct inheritance-based access that can lead to security vulnerabilities. The intermediary layer enables secure feature sharing by explicitly defining access rights rather than implicitly inheriting them.
3Ease of manufacture
If inheritance is over-relied upon, then code reuse is improved, but unnecessary code proliferation occurs
Solution Approach 1:
The patent creates universal independent types that can serve multiple roles without requiring inheritance. A single independent type can be extended by multiple role extensions, allowing one base type to serve multiple functions across different roles. This eliminates the need for multiple inherited subclasses and reduces overall code volume while maintaining reusability.
Solution Approach 2:
The patent segments code into independent types and optional role extensions. Only the necessary role extensions are included in each module, eliminating unnecessary inheritance chains and reducing code volume. The segmented structure allows selective inclusion of features based on actual role requirements rather than forcing complete inheritance of all parent class code.
4Reliability
If role-scope extensions are implemented with separate independent and dependent-link objects, then access security is improved, but system complexity increases
Solution Approach 1:
The patent segments objects into independent objects (containing base type data) and dependent-link objects (containing role-specific extensions). This segmentation enables secure access control by separating the data storage layer from the access control layer. Independent objects store data without knowing about role-specific access rules, while dependent-link objects manage access rights, simplifying the overall system architecture despite the additional object type.
Solution Approach 2:
The patent introduces dependent-link objects as intermediary components that mediate between independent objects and accessing code. These intermediaries handle the complexity of access control and role-specific behavior, shielding the independent objects from security-related complexity. The intermediary layer absorbs the management overhead while maintaining simple, secure access patterns.
Data Source
AI summary
A programming language with compiler-supported type extensions allows the definition of an independent data type, or an element thereof, to be extended by a dependent data type that references the independent data type or the element. The dependent data type can access the independent data type. Compile-time validation restricts the independent data type from accessing the dependent data type, including elements within the definition of the dependent data type, and can generate error messages when an independent data type attempts any such access.