EpanetWrapper Functional Specifications

Overview

EpanetWrapper provides a managed interface to EPANET's native functions, enabling .NET applications to interact with the EPANET simulation engine. It handles memory management, error handling, and provides type-safe access to EPANET functionality.

Core Functionality

1. EPANET Integration

• Interface with EPANET native functions
• Manage EPANET project lifecycle
• Handle memory allocation and cleanup
• Provide error handling and translation

2. Simulation Control

• Initialize hydraulic simulations
• Manage water quality analysis
• Control simulation time steps
• Process simulation results

3. Resource Management

• Handle native resource allocation
• Manage memory cleanup
• Track resource state
• Implement disposal patterns

Functional Requirements

Project Management

1. Project Creation

   • Create EPANET project
   • Initialize project state
   • Set project parameters
   • Handle project cleanup

2. File Management

   • Load input files
   • Handle report files
   • Manage output files
   • Process MSX files

3. State Management

   • Track project state
   • Monitor hydraulic state
   • Track quality state
   • Handle state transitions

Simulation Control

1. Hydraulic Simulation

   • Initialize hydraulic solver
   • Execute hydraulic calculations
   • Process hydraulic results
   • Manage hydraulic state

2. Water Quality Simulation

   • Initialize quality solver
   • Execute quality calculations
   • Process quality results
   • Manage quality state

3. Time Step Control

   • Calculate next hydraulic step
   • Determine quality time step
   • Manage simulation time
   • Handle time synchronization

Resource Management

1. Memory Management

   • Allocate native resources
   • Track resource usage
   • Clean up resources
   • Handle disposal

2. Error Handling

   • Translate EPANET errors
   • Log error messages
   • Implement recovery
   • Maintain error state

3. State Tracking

   • Monitor project state
   • Track solver state
   • Handle state transitions
   • Manage cleanup

Interface Requirements

EPANET Interface

1. Function Wrapping

   • Declare P/Invoke functions
   • Handle parameter marshaling
   • Manage return values
   • Process error codes

2. Type Safety

   • Provide type-safe methods
   • Handle parameter validation
   • Manage type conversion
   • Ensure data integrity

3. Error Handling

   • Translate error codes
   • Provide error messages
   • Implement recovery
   • Log errors

Resource Interface

1. Resource Management

   • Implement IDisposable
   • Handle cleanup
   • Track resources
   • Manage state

2. Memory Management

   • Allocate memory
   • Track usage
   • Clean up resources
   • Handle disposal

Performance Requirements

Execution Performance

1. Native Calls

   • Optimize P/Invoke
   • Minimize marshaling
   • Reduce overhead
   • Improve performance

2. Memory Usage

   • Efficient allocation
   • Proper cleanup
   • Resource tracking
   • Memory optimization

Integration Requirements

External Systems

1. EPANET Integration

   • Interface with EPANET
   • Handle native calls
   • Manage resources
   • Process results

2. Logging Integration

   • Log operations
   • Track errors
   • Record state
   • Monitor performance