动态函数调用

<dependency>
    <groupId>dev.langchain4j</groupId>
    <artifactId>langchain4j-code-execution-engine-graalvm-polyglot</artifactId>
</dependency>

CodeExecutionEngine engine = new GraalVmJavaScriptExecutionEngine();

String code = """
        function fibonacci(n) {
            if (n <= 1) return n;
            return fibonacci(n - 1) + fibonacci(n - 2);
        }
                        
        fibonacci(10)
        """;

String result = engine.execute(code);

ChatAssistant assistant = AiServices.builder(ChatAssistant.class)
        .chatModel(chatModel)
        .tools(new GraalVmJavaScriptExecutionTool())
        .build();

public interface Assistant {
    String chat(String message);
}

String chat = chatAssistant.chat("What is the square root of 485906798473894056 in scientific notation?");
System.out.println(chat);

public class GraalVmJavaScriptExecutionTool {

    // 初始化一个GraalVM JavaScript执行引擎
    private final CodeExecutionEngine engine = new GraalVmJavaScriptExecutionEngine();

    /**
     * 执行JavaScript代码的方法
     * 
     * @Tool 注解标记这个方法为一个工具，可以被AI助手调用
     * 描述指定了这个工具必须用于精确计算，如数学运算、排序、过滤、聚合、字符串处理等
     */
    @Tool("MUST be used for accurate calculations: math, sorting, filtering, aggregating, string processing, etc")
    public String executeJavaScriptCode(
        // @P 注解用于描述参数
        // 这里说明输入的JavaScript代码必须返回一个结果
        @P("JavaScript code to execute, result MUST be returned by the code") String code
    ) {
        // 调用GraalVM执行引擎来执行传入的JavaScript代码
        return engine.execute(code);
    }
}