Stateful Model Node Comparison for Minimal Change Detection
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Solution Overview
Problem
Application development environments face difficulties in efficiently interpreting and updating user interface states when both initial and subsequent states are defined declaratively, leading to inefficient editing and simulation of application changes.
Innovation Solution
The system maintains a base model and a stateful model of the application, where the stateful model represents a single state with pointers to the base model nodes, allowing for efficient detection and implementation of edits by comparing nodes and generating a minimal change list for client updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a complex interpretation algorithm is used to determine minimal changes for state simulation, then the accuracy of state editing is improved, but the device complexity and processing time increase
Solution Approach 1:
The application model is segmented into a base model containing declarative state definitions and a stateful model containing procedural state transitions. This segmentation allows the complex interpretation algorithm to operate only on the stateful model for minimal change detection, while the base model provides the structural framework. The separation reduces the complexity of the overall interpretation process by dividing it into model generation (base model) and state simulation (stateful model) phases.
Solution Approach 2:
The base model is generated in advance by interpreting the declarative code before state simulation occurs. By performing this preliminary action, the complex interpretation algorithm is executed once during model generation rather than repeatedly during each state simulation. The pre-generated base model then serves as a stable reference for detecting minimal changes during subsequent state transitions, significantly reducing processing time and algorithmic complexity during state editing.
2Loss of information
If the entire stateful model is sent to clients for updates, then the completeness of update information is improved, but the quantity of data transmitted and processing overhead increase
Solution Approach 1:
The system extracts only the minimal changes from the stateful model and transmits only those changes to clients, rather than transmitting the entire model. The comparison between the previous stateful model and the new stateful model identifies only the nodes that have changed, and these minimal changes are extracted and sent to clients. This extraction approach maintains update information completeness for the changed portions while significantly reducing data transmission volume and processing overhead for unchanged portions.
Solution Approach 2:
Instead of copying the entire stateful model to clients, the system creates a minimal copy containing only the changed nodes and transmits this reduced copy. The stateful model maintains pointers to the base model, allowing efficient comparison and identification of changes. By copying only the essential change information rather than the complete model, the system reduces data transmission volume while preserving the necessary update information for clients to apply changes correctly.
Data Source
AI summary
Automatic detection and implementation of modifications to an application are described. A new base model of the application is generated using the edited version of the application. This base model is simulated to a selected state, resulting in a new presentation model that includes a tree of multiple objects described by the new base model at the selected state, and a pointer for each node of the tree that points back to the associated node in the new base model. The pointers of each node of the new presentation model are compared to the nodes of the previous presentation model of the application and then replaced with those corresponding nodes in the previous presentation model when the nodes are equivalent. Otherwise, the nodes of the new presentation model are maintained.