Module objects

Wrappers for object pointers returned from the JVM.

Structs

AutoArray

Auto-release wrapper for pointer-based generic arrays.

AutoLocal

Auto-delete wrapper for local refs.

AutoPrimitiveArray

Auto-release wrapper for pointer-based primitive arrays.

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 and can be used in other threads.

JByteBuffer

Lifetime’d representation of a jobject that is an instance of the ByteBuffer Java class. Just a JObject wrapped in a new class.

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.

JList

Wrapper for JObjects that implement java/util/List. Provides methods to get, add, and remove elements.

JListIter

An iterator over the keys and values in a map.

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.

JStaticFieldID

Wrapper around sys::jstaticfieldid 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 jstaticfieldid.

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.

ReleaseMode

ReleaseMode

Traits

TypeArray

Trait to define type array access/release