Comprehensive code quality improvements: fix JavaDoc typos, enhance PathResolver safety, and improve MySQL reconnection logic

[Copilot]

This PR addresses multiple code quality issues and potential bugs discovered during a comprehensive codebase review.

Key Improvements

🔒 Security & Safety Enhancements

PathResolver Memory Safety

• Added safety check to prevent potential DoS attacks through excessive array allocation (capped at 10,000 elements)
• Fixed potential IndexOutOfBoundsException when accessing keys.get(i + 1) without bounds checking
• Added proper validation for invalid array indices with safe NumberFormatException handling

Input Validation

• Added empty path validation to prevent edge case issues in path resolution
• Enhanced error handling for malformed array index patterns

🛠️ Code Quality & Maintainability

Reduced Code Duplication

• Extracted createElementForNextKey() helper method to eliminate duplicate logic across update methods
• Added escapePathKey() helper to properly handle path keys containing dots (fixes existing FIXME)
• Created parseArrayIndex() helper with safe exception handling

Simplified Logic

• Removed redundant bound checking conditions (index >= 0 after already checking index < 0)
• Streamlined array index validation flow

🌐 Network Robustness

MySQL Reconnection Improvements

• Enhanced exponential backoff with maximum cap (30 seconds) to prevent integer overflow
• Added proper interrupt handling with IOException wrapping for cleaner error propagation
• Reset reconnection attempts counter on successful connection
• Moved early failure check to prevent unnecessary connection attempts

📝 Documentation Fixes

JavaDoc Corrections

• Fixed widespread typo: "Weather" → "Whether" across all configuration files
• Improved parameter documentation clarity and correctness

Examples

Before (Potential DoS vulnerability):

PathResolver.update(element, "array[999999999]", value, true); // Could allocate billions of elements

After (Safe with bounds checking):

PathResolver.update(element, "array[999999999]", value, true); // Safely fails at 10,000 limit

Before (Unsafe array access):

if (keys.get(i + 1).startsWith("[")) { // Potential IndexOutOfBoundsException

After (Safe with bounds checking):

if (i + 1 < keys.size() && keys.get(i + 1).startsWith("[")) { // Safe access

Impact

• Security: Prevents potential memory exhaustion attacks
• Reliability: Eliminates runtime exceptions from malformed inputs
• Maintainability: Reduced code duplication and improved readability
• Robustness: Better handling of network failures in MySQL configurations

All changes maintain full backward compatibility while significantly improving code safety and quality.

Warning

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• maven.kaleko.dev
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