Module jni::objects [−] [src]

Wrappers for object pointers returned from the JVM.

Structs

GlobalRef	A global JVM reference. These are "pinned" by the garbage collector and are guaranteed to not get collected until released. Thus, this is allowed to outlive the `JNIEnv` that it came from. Still can't cross thread boundaries since it requires a pointer to the `JNIEnv` to do anything useful with it.
JClass	Lifetime'd representation of a `jclass`. Just a `JObject` wrapped in a new class.
JFieldID	Wrapper around `sys::jfieldid` 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 `jfieldid`.
JMap	Wrapper for JObjects that implement `java/util/Map`. Provides methods to get and set entries and a way to iterate over key/value pairs.
JMapIter	An iterator over the keys and values in a map.
JMethodID	Wrapper around `sys::jmethodid` 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 `jmethodid`.
JObject	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`.
JStaticMethodID	Wrapper around `sys::jmethodid` 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 `jmethodid`. This represents static methods only since they require a different set of JNI signatures.
JString	Lifetime'd representation of a `jstring`. Just a `JObject` wrapped in a new class.
JThrowable	Lifetime'd representation of a `jthrowable`. Just a `JObject` wrapped in a new class.

Enums

JValue

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