Function find_class

rust/src/api_tweaks/android.rs:84–116

Search the class in the cache first. If not found, then call the FindClass of JNI and insert the result to the cache.

(env: *mut JNIEnv, classname: &str)

// Search the class in the cache first. If not found, then call the FindClass of JNI and insert the result to the cache.
pub(crate) fn find_class(env: *mut JNIEnv, classname: &str) -> errors::Result<jclass> {
    unsafe {
        let mut add_to_cache = false;

        let found_in_cache_opt = CLASSES
            .lock()?
            .get(classname)
            .map(|j4rs_class| j4rs_class.class.clone());

        let found: errors::Result<jclass> = match found_in_cache_opt {
            Some(class) => Ok(class),
            None => {
                add_to_cache = true;
                find_class_default(env, classname)
                    .or_else(|_| find_class_using_cached_classloader(env, classname))
            }
        };

        if add_to_cache {
            let mut g = CLASSES.lock()?;
            let global = create_global_ref_from_local_ref(found?, env)?;
            g.insert(
                classname.to_string(),
                J4rsAndroidJclass {
                    class: global.clone(),
                },
            );
            Ok(global as jclass)
        } else {
            Ok(found?)
        }
    }
}

unsafe fn find_class_default(env: *mut JNIEnv, classname: &str) -> errors::Result<jclass> {
    let fc = (**env).v1_6.FindClass;