Trait JniType 

pub unsafe trait JniType {
    // Required method
    fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R;
}

JNI bindings rely on this type being accurate.

Safety

unsafe: Passing the wrong type can cause unsoundness, since the code that interacts with JNI blindly trusts it’s correct.

Why the awkward callback style instead of returning &'static CStr? Arrays of arrays may need to dynamically construct their type strings, which would need to leak. Worse, we can’t easily intern those strings via lazy_static without running into:

error[E0401]: can't use generic parameters from outer function

Required Methods

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl JniType for &CStr

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

impl JniType for bool

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

impl JniType for ()

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

impl JniType for jbyte

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

impl JniType for jchar

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

impl JniType for jdouble

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

impl JniType for jfloat

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

impl JniType for jint

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

impl JniType for jlong

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

impl JniType for jshort

fn static_with_jni_type<R>(callback: impl FnOnce(&CStr) -> R) -> R

Implementors

impl JniType for BooleanArray

impl JniType for ByteArray

impl JniType for CharArray

impl JniType for DoubleArray

impl JniType for FloatArray

impl JniType for IntArray

impl JniType for LongArray

impl JniType for ShortArray

impl<T: ReferenceType, E: ThrowableType> JniType for ObjectArray<T, E>