Trait Type 

pub trait Type: TypeSealed {
    const SIG: Signature;

    // Required method
    fn jni() -> JavaType;

    // Provided method
    fn is_type_of(e: &mut Env<'_>, o: &JObject<'_>) -> bool { ... }
}

A type that has a corresponding Java type

Sealed

You can’t implement this trait directly; instead you can define new java::Classes, which will then come with Type implementations for free.

Conversions

rust type	java type	notes
T where T: java::Class	fully qualified class path
Result<T, java::lang::Throwable>	T::PATH	java::Class must be implemented for T
java::Nullable<T>	T::PATH	java::Class must be implemented for T
java::NoUpcast<T>	java::lang::Object	java::Class must be implemented for T. Used when a method should have the signature of returning T, but you would like the object reference without java::Object::upcasting.
java::lang::Object	java.lang.Object
Vec<T>	T[]	T must be java::Type
String	java.lang.String	java::Class and java::Object implemented for String
()	void
u16	char
i8	byte
i16	short
i32	int
i64	long
f32	float
f64	double
fn(T,*) -> R	corresponding java type signature	all argument types and return types must be java::Type

Required Associated Constants

const SIG: Signature

The signature for this type

Required Methods

fn jni() -> JavaType

Get the jni rep of this type

Provided Methods

fn is_type_of(e: &mut Env<'_>, o: &JObject<'_>) -> bool

Determines whether an object is an instance of this type

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 Type for bool

const SIG: Signature

fn jni() -> JavaType

impl Type for f32

const SIG: Signature

fn jni() -> JavaType

impl Type for f64

const SIG: Signature

fn jni() -> JavaType

impl Type for i8

const SIG: Signature

fn jni() -> JavaType

impl Type for i16

const SIG: Signature

fn jni() -> JavaType

impl Type for i32

const SIG: Signature

fn jni() -> JavaType

impl Type for i64

const SIG: Signature

fn jni() -> JavaType

impl Type for u16

const SIG: Signature

fn jni() -> JavaType

impl Type for ()

const SIG: Signature

fn jni() -> JavaType

impl Type for GlobalRef

const SIG: Signature = java::lang::Object::SIG

fn jni() -> JavaType

impl<R> Type for fn() -> R

where R: Type,

const SIG: Signature

fn jni() -> JavaType

impl<R, A> Type for fn(A) -> R

where R: Type, A: Type,

const SIG: Signature

fn jni() -> JavaType

impl<R, A, B> Type for fn(A, B) -> R

where R: Type, A: Type, B: Type,

const SIG: Signature

fn jni() -> JavaType

impl<R, A, B, C> Type for fn(A, B, C) -> R

where R: Type, A: Type, B: Type, C: Type,

const SIG: Signature

fn jni() -> JavaType

impl<R, A, B, C, D> Type for fn(A, B, C, D) -> R

where R: Type, A: Type, B: Type, C: Type, D: Type,

const SIG: Signature

fn jni() -> JavaType

impl<R, A, B, C, D, E> Type for fn(A, B, C, D, E) -> R

where R: Type, A: Type, B: Type, C: Type, D: Type, E: Type,

const SIG: Signature

fn jni() -> JavaType

impl<T> Type for Result<T, Throwable>

where T: Class,

const SIG: Signature

fn jni() -> JavaType

impl<T> Type for Vec<T>

where T: Type,

const SIG: Signature

fn jni() -> JavaType

Implementors

impl<T> Type for T

where T: Class,

const SIG: Signature