Trait FromJava

pub trait FromJava<'j>: Sized {
    type From: Sized;

    // Required method
    fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>;
}

Specifies how a Java type should be converted before being fed to Rust.

Required Associated Types

type From: Sized

The JNI type representing the input.

Required Methods

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

Attempts to convert this Java object into its Rust counterpart.

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<'j> FromJava<'j> for bool

type From = u8

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for char

type From = u16

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for f32

type From = f32

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for f64

type From = f64

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for i8

type From = i8

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for i16

type From = i16

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for i32

type From = i32

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for i64

type From = i64

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for String

type From = JString<'j>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for Vec<bool>

type From = JPrimitiveArray<'j, u8>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for Vec<char>

type From = JPrimitiveArray<'j, u16>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for Vec<f32>

type From = JPrimitiveArray<'j, f32>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for Vec<f64>

type From = JPrimitiveArray<'j, f64>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for Vec<i8>

type From = JPrimitiveArray<'j, i8>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for Vec<i16>

type From = JPrimitiveArray<'j, i16>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for Vec<i32>

type From = JPrimitiveArray<'j, i32>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for Vec<i64>

type From = JPrimitiveArray<'j, i64>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for JObject<'j>

type From = JObject<'j>

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for JObjectArray<'j>

type From = JObjectArray<'j>

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j> FromJava<'j> for JString<'j>

type From = JString<'j>

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j, T> FromJava<'j> for Option<T>

where T: FromJava<'j, From: AsRef<JObject<'j>>>,

type From = <T as FromJava<'j>>::From

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

impl<'j, T: TypeArray> FromJava<'j> for JPrimitiveArray<'j, T>

type From = JPrimitiveArray<'j, T>

fn from_java(_: &mut JNIEnv<'_>, value: Self::From) -> Result<Self, Error>

impl<'j, T: FromJava<'j, From = JObject<'j>>> FromJava<'j> for Vec<T>

type From = JObjectArray<'j>

fn from_java(env: &mut JNIEnv<'j>, value: Self::From) -> Result<Self, Error>

Implementors