Enum JValueGen

pub enum JValueGen<O> {
    Object(O),
    Byte(i8),
    Char(u16),
    Short(i16),
    Int(i32),
    Long(i64),
    Bool(u8),
    Float(f32),
    Double(f64),
    Void,
}

Rusty version of the JNI C jvalue enum. Used in Java method call arguments and returns.

JValueGen is a generic type, meant to represent both owned and borrowed JNI values. The type parameter O refers to what kind of object reference the JValueGen can hold, which is either:

• an owned JObject, used for values returned from a Java method call, or
• a borrowed &JObject, used for parameters passed to a Java method call.

These two cases are represented by the type aliases JValueOwned and JValue, respectively.

Variants

Object(O)

Byte(i8)

Char(u16)

Short(i16)

Int(i32)

Long(i64)

Bool(u8)

Float(f32)

Double(f64)

Void

Implementations

impl<O> JValueGen<O>

pub fn as_jni<'local>(&self) -> jvalue

where O: AsRef<JObject<'local>> + Debug,

Convert the enum to its jni-compatible equivalent.

pub fn to_jni<'local>(self) -> jvalue

where O: AsRef<JObject<'local>> + Debug,

👎Deprecated: Use as_jni instead.

Convert the enum to its jni-compatible equivalent.

pub fn type_name(&self) -> &'static str

Get the type name for the enum variant.

pub fn primitive_type(&self) -> Option<Primitive>

Get the primitive type for the enum variant. If it’s not a primitive (i.e. an Object), returns None.

pub fn l(self) -> Result<O, Error>

Try to unwrap to an Object.

pub fn z(self) -> Result<bool, Error>

Try to unwrap to a boolean.

pub fn b(self) -> Result<i8, Error>

Try to unwrap to a byte.

pub fn c(self) -> Result<u16, Error>

Try to unwrap to a char.

pub fn d(self) -> Result<f64, Error>

Try to unwrap to a double.

pub fn f(self) -> Result<f32, Error>

Try to unwrap to a float.

pub fn i(self) -> Result<i32, Error>

Try to unwrap to an int.

pub fn j(self) -> Result<i64, Error>

Try to unwrap to a long.

pub fn s(self) -> Result<i16, Error>

Try to unwrap to a short.

pub fn v(self) -> Result<(), Error>

Try to unwrap to a void.

pub fn borrow(&self) -> JValueGen<&O>

Copies or borrows the value in this JValue.

If the value is a primitive type, it is copied. If the value is an object reference, it is borrowed.

Trait Implementations

impl<O> Clone for JValueGen<O>

where O: Clone,

fn clone(&self) -> JValueGen<O>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<O> Debug for JValueGen<O>

where O: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'obj_ref, O> From<&'obj_ref JValueGen<O>> for JValueGen<&'obj_ref O>

fn from(other: &'obj_ref JValueGen<O>) -> JValueGen<&'obj_ref O>

Converts to this type from the input type.

impl<'local, 'obj_ref, T> From<&'obj_ref T> for JValueGen<&'obj_ref JObject<'local>>

where 'local: 'obj_ref, T: AsRef<JObject<'local>>,

fn from(other: &'obj_ref T) -> JValueGen<&'obj_ref JObject<'local>>

Converts to this type from the input type.

impl<O> From<()> for JValueGen<O>

fn from(_: ()) -> JValueGen<O>

Converts to this type from the input type.

impl<'local, T> From<T> for JValueGen<JObject<'local>>

where T: Into<JObject<'local>>,

fn from(other: T) -> JValueGen<JObject<'local>>

Converts to this type from the input type.

impl<O> From<bool> for JValueGen<O>

fn from(other: bool) -> JValueGen<O>

Converts to this type from the input type.

impl<O> From<f32> for JValueGen<O>

fn from(other: f32) -> JValueGen<O>

Converts to this type from the input type.

impl<O> From<f64> for JValueGen<O>

fn from(other: f64) -> JValueGen<O>

Converts to this type from the input type.

impl<O> From<i16> for JValueGen<O>

fn from(other: i16) -> JValueGen<O>

Converts to this type from the input type.

impl<O> From<i32> for JValueGen<O>

fn from(other: i32) -> JValueGen<O>

Converts to this type from the input type.

impl<O> From<i64> for JValueGen<O>

fn from(other: i64) -> JValueGen<O>

Converts to this type from the input type.

impl<O> From<i8> for JValueGen<O>

fn from(other: i8) -> JValueGen<O>

Converts to this type from the input type.

impl<O> From<u16> for JValueGen<O>

fn from(other: u16) -> JValueGen<O>

Converts to this type from the input type.

impl<O> From<u8> for JValueGen<O>

fn from(other: u8) -> JValueGen<O>

Converts to this type from the input type.

impl<'local> TryFrom<JValueGen<JObject<'local>>> for JObject<'local>

type Error = Error

The type returned in the event of a conversion error.

fn try_from(value: JValueGen<JObject<'local>>) -> Result<JObject<'local>, Error>

Performs the conversion.

impl<O> Copy for JValueGen<O>

where O: Copy,