Trait robusta_jni::convert::safe::TryIntoJavaValue

pub trait TryIntoJavaValue<'env>: Signature {
    type Target: JavaValue<'env>;

    const SIG_TYPE: &'static str;

    fn try_into(self, env: &JNIEnv<'env>) -> Result<Self::Target>;
}

Conversion trait from Rust values to Java values, analogous to TryInto. Used when converting types returned from JNI-available functions.

This is the default trait used when converting values from Rust to Java.

Notes on derive macro

The same notes on TryFromJavaValue apply.

Note that when autoderiving TryIntoJavaValue for T, an implementation for all of T, &T and &mut T is generated (for ergonomics).

Associated Types

type Target: JavaValue<'env>

Conversion target type.

Associated Constants

const SIG_TYPE: &'static str

Signature of the source type. By default, use the one defined on the Signature trait for the implementing type.

Required methods

fn try_into(self, env: &JNIEnv<'env>) -> Result<Self::Target>

Perform the conversion.

Implementations on Foreign Types

impl<'env> TryIntoJavaValue<'env> for String

type Target = JString<'env>

const SIG_TYPE: &'static str

fn try_into(self, env: &JNIEnv<'env>) -> Result<Self::Target>

impl<'env> TryIntoJavaValue<'env> for bool

type Target = jboolean

fn try_into(self, _env: &JNIEnv<'env>) -> Result<Self::Target>

impl<'env> TryIntoJavaValue<'env> for char

type Target = jchar

fn try_into(self, _env: &JNIEnv<'env>) -> Result<Self::Target>

impl<'env> TryIntoJavaValue<'env> for Box<[bool]>

type Target = jbooleanArray

fn try_into(self, env: &JNIEnv<'env>) -> Result<Self::Target>

impl<'env, T> TryIntoJavaValue<'env> for Vec<T> where
    T: TryIntoJavaValue<'env>, 

type Target = jobject

fn try_into(self, env: &JNIEnv<'env>) -> Result<Self::Target>

impl<'env, T> TryIntoJavaValue<'env> for Result<T> where
    T: TryIntoJavaValue<'env>, 

When returning a jni::errors::Result, if the returned variant is Ok(v) then the value v is returned as usual.

If the returned value is Err, the Java exception specified in the #[call_type(safe)] attribute is thrown (by default java.lang.RuntimeException)

type Target = <T as TryIntoJavaValue<'env>>::Target

fn try_into(self, env: &JNIEnv<'env>) -> Result<Self::Target>

Implementors

impl<'env, T> TryIntoJavaValue<'env> for T where
    T: JavaValue<'env> + Signature,