Struct JVm

Source

pub struct JVm { /* private fields */ }

Implementations§

Source §

pub fn singleton(v: Option<JVm>) -> Option<JVm>

Examples found in repository ?

examples/nama.rs (line 53)

50		fn MyInterface_class(env: Option<&JEnv>) -> Option<JClassID> {
51			const MY_INTERFACE_NAME: &'static [u8] = b"MyInterface\0";
52			static CACHE: CachedID = CachedID::new();
53			CACHE.get(|| env.unwrap_or(JVm::singleton(None)?.env()?).find_class(MY_INTERFACE_NAME))
54		}
55		fn bar(&self, env: &JEnv) -> Option<()> {
56			static CACHE: CachedID = CachedID::new();
57			CACHE
58				.get(|| Self::MyInterface_class(Some(env))?.method(env, b"bar\0", b"()V\0"))?
59				.call(env, self.as_ref(), ())
60		}
61	}
62	pub struct MyInterfaceObject {
63		inner: JObject,
64	}
65	impl MyInterface for MyInterfaceObject {}
66	impl AsRef<JObject> for MyInterfaceObject {
67		fn as_ref(&self) -> &JObject {
68			&self.inner
69		}
70	}
71
72	#[no_mangle]
73	#[allow(non_snake_case)]
74	extern "system" fn Java_Hello_print(env: &JEnv, hello: &Hello, i: JInt) {
75		println!("[Rust] Hello print called {i}");
76		hello.play(env);
77	}
78	#[no_mangle]
79	#[allow(non_snake_case)]
80	extern "system" fn Java_HelloOne_printone(env: &JEnv, hello: &Hello) {
81		println!("[Rust] Hello printone called");
82		hello.play(env);
83		hello.bar(env);
84	}
85	#[no_mangle]
86	#[allow(non_snake_case)]
87	extern "system" fn Java_HelloTwo_printtwo(env: &JEnv, hello: &Hello) {
88		println!("[Rust] Hello printtwo called");
89		hello.play(env);
90		hello.bar(env);
91	}
92}
93mod world {
94	use jnim::{CachedID, JClassID, JEnv, JInt, JNameMaker, JObject, JPlainMarker};
95
96	#[no_mangle]
97	#[allow(non_snake_case)]
98	extern "system" fn Java_World_print(env: &JEnv, world: &World, i: JInt) {
99		println!("[Rust] World print called {i}");
100		world.play(env);
101		world.get_state(env).map(|value| world.set_state(env, value + 100));
102	}
103
104	struct World {
105		__supper: JObject,
106	}
107	impl AsRef<JObject> for World {
108		fn as_ref(&self) -> &JObject {
109			&self.__supper
110		}
111	}
112	impl JNameMaker for World {
113		const JAVA_PATH: &'static [u8] = b"World\0";
114	}
115	impl JPlainMarker for World {
116		fn class(env: Option<&JEnv>) -> Option<JClassID> {
117			static CACHE: CachedID = CachedID::new();
118			CACHE.get(|| JEnv::env(env)?.find_class(Self::JAVA_PATH))
119		}
120	}
121	impl World {
122		fn get_state(&self, env: &JEnv) -> Option<JInt> {
123			static CACHE: CachedID = CachedID::new();
124			CACHE
125				.get(|| Self::class(Some(env))?.field(env, b"state\0", b"I\0"))?
126				.get(env, self.as_ref())
127		}
128		fn set_state(&self, env: &JEnv, value: JInt) -> Option<()> {
129			static CACHE: CachedID = CachedID::new();
130			CACHE
131				.get(|| Self::class(Some(env))?.field(env, b"state\0", b"I\0"))?
132				.set(env, self.as_ref(), value)
133		}
134		fn play(&self, env: &JEnv) -> Option<()> {
135			static CACHE: CachedID = CachedID::new();
136			CACHE
137				.get(|| Self::class(Some(env))?.method(env, b"play\0", b"()V\0"))?
138				.call(env, self.as_ref(), ())
139		}
140	}
141}
142
143#[no_mangle]
144#[allow(non_snake_case)]
145extern "system" fn JNI_OnLoad(vm: JVm, _: &JVoid) -> JInt {
146	JVm::singleton(Some(vm));
147	JVm::DEFAULT_VERSION
148}

Source

pub fn attach(&self) -> Option<&'static JEnv>

Source

pub fn attach_as_daemon(&self) -> Option<&'static JEnv>

Source

pub fn detach(&self)

Source

pub fn env_with_version(&self, version: jint) -> Option<&'static JEnv>

Source

pub fn env(&self) -> Option<&'static JEnv>

Examples found in repository ?

examples/nama.rs (line 53)

50		fn MyInterface_class(env: Option<&JEnv>) -> Option<JClassID> {
51			const MY_INTERFACE_NAME: &'static [u8] = b"MyInterface\0";
52			static CACHE: CachedID = CachedID::new();
53			CACHE.get(|| env.unwrap_or(JVm::singleton(None)?.env()?).find_class(MY_INTERFACE_NAME))
54		}