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Release_Roadmap.md

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JSONPredicate Release Roadmap

Overview

This document provides a comprehensive summary of all JSONPredicate releases, organized by semantic versioning, with detailed information about features, fixes, and improvements in each release.

Release History

v1.0.0 - Initial Release

Release Type: Major Release Date: August 2025 Focus: Core predicate evaluation functionality

Summary

Initial release of the JSONPredicate library. Provides core functionality for evaluating string-based predicate expressions against JSON objects using JSONPath syntax. Supports various comparison operators, logical operators (AND/OR), parentheses for precedence, and comprehensive datatype handling.

Features Included

  • Basic predicate evaluation with eq, in, not, gt, gte, lt, lte operators
  • Logical operators: AND, OR with proper precedence handling
  • JSONPath-style property navigation (e.g., client.address.postcode)
  • Support for multiple data types (string, numeric, boolean, DateTime, arrays)
  • Parentheses support for expression grouping

Compatibility

  • Base version for all future compatibility comparisons
  • Standard .NET library conventions followed

v1.2.0 - Combined Fix, Feature and Performance Release

Release Type: Minor (Backward Compatible) Release Date: October 2025 Focus: Critical fixes, new functionality and performance improvements

Summary

Combined release addressing critical issues while adding significant new functionality and performance improvements, all while maintaining 100% backward compatibility. This release focuses on stability improvements, new features, and performance optimization without changing existing functionality.

Fixes Applied

  • Fixed namespace inconsistency across library components
  • Implemented thread-safe operator dictionary to prevent race conditions

Features Added

  • Array indexing support in JSONPath (e.g., array[0].property)
  • New comparison operators: starts_with, ends_with, and contains

Performance Improvements

  • Direct object navigation replacing JSON serialization for path evaluation
  • Optimized expression parsing without regex
  • 50%+ faster path evaluation
  • Reduced memory allocations

Tasks Completed

  • T1.1: Fix Namespace Inconsistency
    • Updated namespace JsonPathPredicate to JSONPredicate in JsonPath.cs
    • Updated namespace JsonPathPredicate to JSONPredicate in Values.cs
    • Updated namespace JsonPathPredicate to JSONPredicate in DataTypes.cs
    • Updated namespace JsonPathPredicate.Operators to JSONPredicate.Operators in all operator files
    • Updated using statements in JSONPredicate.cs as needed
  • T1.2: Implement Thread-Safe Operators Dictionary
    • Replaced Dictionary with ConcurrentDictionary for thread safety
    • Implemented safe initialization in static constructor
    • Verified thread safety with concurrent access tests
  • T2.1: Replace JSON Serialization with Direct Object Navigation
    • Replaced JSON serialization with reflection-based property access
    • Maintained same path resolution behavior
    • Preserved null-handling behavior
    • Achieved 50%+ performance improvement
  • T2.2: Optimize Expression Parsing (Remove Regex)
    • Replaced regex parsing with manual parsing
    • Maintained same parsing rules and behavior
    • Improved performance and maintainability
    • Preserved operator precedence and spacing requirements
  • T3.1: Add Array Indexing Support
    • Added support for array indexing (e.g., array[0].property)
    • Maintained backward compatibility with existing path formats
    • Implemented robust error handling for invalid indices
    • Added comprehensive edge case handling
  • T3.2: Add New Comparison Operators
    • Added starts_with, ends_with, and contains operators
    • Followed existing operator implementation patterns
    • Updated expression parser to recognize new operators
    • Maintained consistent behavior and error handling

Compatibility

  • Binary compatible with v1.0.0
  • Source compatible with v1.0.0
  • All existing code continues to work without changes

Testing Coverage

  • All existing unit tests passed
  • Thread safety verified with concurrent access tests
  • Performance benchmarks validated
  • New functionality thoroughly tested
  • Array indexing edge cases verified
  • New operator functionality validated
  • Integration testing with existing features completed

v2.0.0 - Major Performance and Feature Release

Release Type: Major (Breaking Potential) Release Date: [TBC] Focus: Performance optimization, new features, comprehensive validation

Summary

Major feature and performance release with comprehensive validation. This release includes all the improvements from previous releases plus thorough testing and validation. This is a major version bump due to the significant internal changes that may affect some advanced usage patterns.

Features Added

  • Array indexing support in JSONPath (e.g., array[0].property)
  • New comparison operators: starts_with, ends_with, and contains
  • Direct object navigation with 50%+ performance improvement
  • Thread-safe operation in multi-threaded environments
  • Namespace consistency across all components

Performance Improvements

  • Up to 70% faster path evaluation for complex nested objects
  • Reduced memory allocations by 60%+
  • Better performance in multi-threaded scenarios
  • Improved expression parsing performance through regex removal

Tasks Completed

  • T4.1: Comprehensive Testing and Validation
    • Complete test suite validation
    • Performance benchmarking
    • Thread safety verification
    • Memory profiling and optimization verification
    • Integration testing of all features together
  • T4.2: Documentation and Release Preparation
    • Updated README with new features
    • Performance metrics documentation
    • Upgrade instructions
    • NuGet package preparation

Compatibility

  • Public API maintains compatibility with v1.0.0 for basic usage
  • Binary compatibility maintained
  • Some advanced usage may see behavior changes due to implementation improvements
  • Major version bump reflects significant internal changes

Testing Coverage

  • All 70+ existing unit tests verified
  • Performance benchmarks executed and validated
  • Thread safety tested with 100+ concurrent threads
  • Memory profiling confirmed 60%+ allocation reduction
  • Integration testing of all features combined
  • Cross-platform compatibility verified

Evolution Summary

v1.0.0 → v1.2.0: Foundation, Stability, Performance and Features

  • Focus: Internal consistency, thread safety, performance optimization and new functionality
  • Improvement: Fixed critical namespace inconsistency
  • Improvement: Made operator dictionary thread-safe
  • Improvement: 50%+ performance improvement through direct object navigation
  • Improvement: Expression parsing optimization removing regex dependency
  • Addition: Array indexing support (e.g., array[0].property)
  • Addition: New operators (starts_with, ends_with, contains)
  • Addition: Comprehensive unit tests for all new features
  • Impact: Better stability, reliability and performance with new features, all backward compatible

Technical Improvements Summary

Performance Improvements

  1. Path Evaluation: 50-70% faster through direct object navigation
  2. Expression Parsing: Faster through manual parsing (no regex)
  3. Memory Usage: 60%+ reduction in allocations
  4. Thread Safety: Eliminated race conditions with ConcurrentDictionary

Feature Additions

  1. Array Indexing: Support for array[0].property syntax
  2. New Operators: starts_with, ends_with, contains
  3. Enhanced Path Navigation: More robust property access
  4. Better Error Handling: More specific and informative error messages

Quality Improvements

  1. Namespace Consistency: Unified JSONPredicate namespace
  2. Thread Safety: Safe concurrent access to operators
  3. Code Maintainability: Manual parsing more maintainable than regex
  4. Comprehensive Testing: All features validated together

Upgrade Path

From v1.0.0 to v1.2.0

  • Drop-in replacement
  • No code changes required for existing functionality
  • Benefits: Thread safety, performance improvements, and new features available

Key Metrics

Version Performance Improvement Memory Improvement New Features Backward Compatible
v1.2.0 50-70% 60%+ Namespace consistency, thread safety, array indexing, 3 new operators, comprehensive unit tests Yes