advanced_method_calls/
advanced_method_calls.rs

1use rust_rule_engine::*;
2use std::error::Error;
3
4fn main() -> std::result::Result<(), Box<dyn Error>> {
5    demo_method_calls()?;
6    Ok(())
7}
8
9fn demo_method_calls() -> std::result::Result<(), Box<dyn Error>> {
10    println!("=== Demo: Advanced Method Calls ===");
11
12    // Create Knowledge Base
13    let kb = KnowledgeBase::new("MethodCallsDemo");
14
15    // Define rule with simpler condition first
16    let speedup_rule = r#"rule "SpeedUp" salience 10 { 
17        when TestCar.speedUp == true 
18        then TestCar.Speed = 70; 
19    }"#;
20
21    // Parse and add rule
22    let rules = GRLParser::parse_rules(speedup_rule)?;
23    let rule = rules.into_iter().next().unwrap();
24    let _ = kb.add_rule(rule);
25
26    // Create engine with debug mode
27    let config = EngineConfig {
28        max_cycles: 10,
29        timeout: None,
30        enable_stats: true,
31        debug_mode: true,
32    };
33    let engine = RustRuleEngine::with_config(kb, config);
34
35    // Create facts
36    let facts = Facts::new();
37
38    // Create TestCar object using helper
39    let test_car = FactHelper::create_test_car(
40        true,  // speedUp
41        50.0,  // speed
42        100.0, // maxSpeed
43        10.0,  // speedIncrement
44    );
45
46    // Create DistanceRecord object using helper
47    let distance_record = FactHelper::create_distance_record(0.0);
48
49    // Add facts
50    facts.add_value("TestCar", test_car)?;
51    facts.add_value("DistanceRecord", distance_record)?;
52
53    println!("\n🏁 Initial state:");
54    if let Some(car) = facts.get("TestCar") {
55        if let Some(speed) = car.get_property("Speed") {
56            println!("   TestCar.Speed = {:?}", speed);
57        }
58        if let Some(speed_up) = car.get_property("speedUp") {
59            println!("   TestCar.speedUp = {:?}", speed_up);
60        }
61    }
62
63    // Execute rules multiple cycles to see progression
64    println!("\n🚀 Executing SpeedUp rule multiple times...");
65    for i in 1..=3 {
66        println!("\n--- Cycle {} ---", i);
67        let result = engine.execute(&facts)?;
68
69        println!("Rules fired: {}", result.rules_fired);
70
71        if let Some(car) = facts.get("TestCar") {
72            if let Some(speed) = car.get_property("Speed") {
73                println!("TestCar.Speed after cycle {}: {:?}", i, speed);
74            }
75        }
76
77        // Check if we reached max speed
78        if let Some(car) = facts.get("TestCar") {
79            if let Some(speed) = car.get_property("speed") {
80                if let Some(max_speed) = car.get_property("maxSpeed") {
81                    if speed.to_number() >= max_speed.to_number() {
82                        println!("🏁 Max speed reached!");
83                        break;
84                    }
85                }
86            }
87        }
88    }
89
90    println!("\n📊 Final Results:");
91    if let Some(car) = facts.get("TestCar") {
92        if let Some(speed) = car.get_property("Speed") {
93            println!("   Final TestCar.Speed = {:?}", speed);
94        }
95    }
96
97    Ok(())
98}
advanced_method_calls/advanced_method_calls.rs

advanced_method_calls/
advanced_method_calls.rs
