Struct jni::objects::JObject

#[repr(transparent)]
pub struct JObject<'a> { /* private fields */ }

Wrapper around sys::jobject that adds a lifetime. This prevents it from outliving the context in which it was acquired and getting GC’d out from under us. It matches C’s representation of the raw pointer, so it can be used in any of the extern function argument positions that would take a jobject.

Most other types in the objects module deref to this, as they do in the C representation.

Implementations

impl<'a> JObject<'a>

pub unsafe fn from_raw(raw: jobject) -> Self

Creates a JObject that wraps the given raw jobject

Safety

Expects a valid pointer or null

pub fn into_raw(self) -> jobject

Unwrap to the internal jni type.

pub fn null() -> JObject<'a>

Creates a new null object

Trait Implementations

impl<'a> Clone for JObject<'a>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for JObject<'a>

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

Formats the value using the given formatter.

impl<'a> Default for JObject<'a>

fn default() -> Self

Returns the “default value” for a type.

impl<'a> Deref for JObject<'a>

type Target = *mut _jobject

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a, 'b> Desc<'a, JClass<'a>> for JObject<'b>

fn lookup(self, env: &JNIEnv<'a>) -> Result<JClass<'a>>

Look up the concrete type from the JVM.

impl<'a> From<&'a AutoLocal<'a, '_>> for JObject<'a>

fn from(other: &'a AutoLocal<'_, '_>) -> JObject<'a>

Converts to this type from the input type.

impl<'a> From<&'a GlobalRef> for JObject<'a>

fn from(other: &'a GlobalRef) -> JObject<'a>

Converts to this type from the input type.

impl<'a> From<JByteBuffer<'a>> for JObject<'a>

fn from(other: JByteBuffer<'_>) -> JObject<'_>

Converts to this type from the input type.

impl<'a> From<JClass<'a>> for JObject<'a>

fn from(other: JClass<'_>) -> JObject<'_>

Converts to this type from the input type.

impl<'a: 'b, 'b> From<JList<'a, 'b>> for JObject<'a>

fn from(other: JList<'a, 'b>) -> JObject<'a>

Converts to this type from the input type.

impl<'a: 'b, 'b> From<JMap<'a, 'b>> for JObject<'a>

fn from(other: JMap<'a, 'b>) -> JObject<'a>

Converts to this type from the input type.

impl<'a> From<JObject<'a>> for JByteBuffer<'a>

fn from(other: JObject<'_>) -> Self

Converts to this type from the input type.

impl<'a> From<JObject<'a>> for JClass<'a>

This conversion assumes that the JObject is a pointer to a class object.

fn from(other: JObject<'_>) -> Self

Converts to this type from the input type.

impl<'a> From<JObject<'a>> for JString<'a>

fn from(other: JObject<'_>) -> Self

Converts to this type from the input type.

impl<'a> From<JObject<'a>> for JThrowable<'a>

fn from(other: JObject<'_>) -> Self

Converts to this type from the input type.

impl<'a> From<JString<'a>> for JObject<'a>

fn from(other: JString<'_>) -> JObject<'_>

Converts to this type from the input type.

impl<'a> From<JThrowable<'a>> for JObject<'a>

fn from(other: JThrowable<'_>) -> JObject<'_>

Converts to this type from the input type.

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

type Error = Error

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<'a> Copy for JObject<'a>