Method callDynamic

java/cli/src/main/java/cli/Main.java:195–247

(Object instance, String methodName, Object... args)

    }

    public static Object callDynamic(Object instance, String methodName, Object... args) {
        Class<?> clazz = instance.getClass();

        try {
            Class<?>[] paramTypes = Arrays.stream(args)
                                        .map(a -> a == null ? null : a.getClass())
                                        .toArray(Class<?>[]::new);

            try {
                Method m = clazz.getMethod(methodName, paramTypes);
                return m.invoke(instance, args);
            } catch (NoSuchMethodException ignore) {
                // Try matching a varargs method
            }

            // Try varargs method: (Object, Object[])
            for (Method m : clazz.getMethods()) {
                if (!m.getName().equals(methodName)) continue;

                if (m.isVarArgs()) {
                    Class<?>[] types = m.getParameterTypes();

                    int fixedCount = types.length - 1;

                    if (args.length < fixedCount) continue;

                    Object[] invokeArgs = new Object[types.length];

                    for (int i = 0; i < fixedCount; i++) {
                        invokeArgs[i] = args[i];
                    }

                    // Build the varargs array
                    Class<?> varType = types[fixedCount].getComponentType();
                    int varCount = args.length - fixedCount;

                    Object varArray = Array.newInstance(varType, varCount);
                    for (int i = 0; i < varCount; i++) {
                        Array.set(varArray, i, args[fixedCount + i]);
                    }

                    invokeArgs[fixedCount] = varArray;

                    return m.invoke(instance, invokeArgs);
                }
            }

            throw new NoSuchMethodException("Method " + methodName + " not found");

        } catch (Exception e) {
            throw new RuntimeException("Error calling method: " + methodName, e);
        }
    }