Enum jni::objects::JValue

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pub enum JValue<'a> {
    Object(JObject<'a>),
    Byte(jbyte),
    Char(jchar),
    Short(jshort),
    Int(jint),
    Long(jlong),
    Bool(jboolean),
    Float(jfloat),
    Double(jdouble),
    Void,
}

Expand description

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

Variants

`Object(JObject<'a>)`

`Byte(jbyte)`

`Char(jchar)`

`Short(jshort)`

`Int(jint)`

`Long(jlong)`

`Bool(jboolean)`

`Float(jfloat)`

`Double(jdouble)`

`Void`

Implementations

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impl<'a> JValue<'a>

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pub fn to_jni(self) -> jvalue

Convert the enum to its jni-compatible equivalent.

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

Get the type name for the enum variant.

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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.

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pub fn l(self) -> Result<JObject<'a>>

Try to unwrap to an Object.

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

Try to unwrap to a boolean.

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pub fn b(self) -> Result<jbyte>

Try to unwrap to a byte.

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pub fn c(self) -> Result<jchar>

Try to unwrap to a char.

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pub fn d(self) -> Result<jdouble>

Try to unwrap to a double.

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pub fn f(self) -> Result<jfloat>

Try to unwrap to a float.

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pub fn i(self) -> Result<jint>

Try to unwrap to an int.

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pub fn j(self) -> Result<jlong>

Try to unwrap to a long.

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pub fn s(self) -> Result<jshort>

Try to unwrap to a short.

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

Try to unwrap to a void.

Trait Implementations

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impl<'a> Clone for JValue<'a>

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fn clone(&self) -> JValue<'a>

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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impl<'a> Debug for JValue<'a>

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

Formats the value using the given formatter. Read more

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impl<'a> From<()> for JValue<'a>

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fn from(_: ()) -> Self

Converts to this type from the input type.

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impl<'a> From<JValue<'a>> for jvalue

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fn from(other: JValue<'_>) -> jvalue

Converts to this type from the input type.

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impl<'a, T: Into<JObject<'a>>> From<T> for JValue<'a>

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fn from(other: T) -> Self

Converts to this type from the input type.

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impl<'a> From<bool> for JValue<'a>

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fn from(other: bool) -> Self

Converts to this type from the input type.

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impl<'a> From<f32> for JValue<'a>

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fn from(other: jfloat) -> Self

Converts to this type from the input type.

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impl<'a> From<f64> for JValue<'a>

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fn from(other: jdouble) -> Self

Converts to this type from the input type.

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impl<'a> From<i16> for JValue<'a>

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fn from(other: jshort) -> Self

Converts to this type from the input type.

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impl<'a> From<i32> for JValue<'a>

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fn from(other: jint) -> Self

Converts to this type from the input type.

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impl<'a> From<i64> for JValue<'a>

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fn from(other: jlong) -> Self

Converts to this type from the input type.

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impl<'a> From<i8> for JValue<'a>

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fn from(other: jbyte) -> Self

Converts to this type from the input type.

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impl<'a> From<u16> for JValue<'a>

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fn from(other: jchar) -> Self

Converts to this type from the input type.

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impl<'a> From<u8> for JValue<'a>

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fn from(other: jboolean) -> Self

Converts to this type from the input type.

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impl<'a> TryFrom<JValue<'a>> for JObject<'a>

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> TryFrom<JValue<'a>> for jboolean

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> TryFrom<JValue<'a>> for jchar

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> TryFrom<JValue<'a>> for jshort

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> TryFrom<JValue<'a>> for jfloat

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> TryFrom<JValue<'a>> for jdouble

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> TryFrom<JValue<'a>> for jint

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> TryFrom<JValue<'a>> for jlong

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> TryFrom<JValue<'a>> for jbyte

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> TryFrom<JValue<'a>> for ()

type Error = Error

The type returned in the event of a conversion error.

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fn try_from(value: JValue<'a>) -> Result<Self>

Performs the conversion.

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impl<'a> Copy for JValue<'a>

Auto Trait Implementations

impl<'a> RefUnwindSafe for JValue<'a>

impl<'a> !Send for JValue<'a>

impl<'a> !Sync for JValue<'a>

impl<'a> Unpin for JValue<'a>

impl<'a> UnwindSafe for JValue<'a>

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.