java.lang
Class ClassLoader.NativeLibrary

java.lang.Object
  java.lang.ClassLoader.NativeLibrary

Enclosing class:

ClassLoader

static class ClassLoader.NativeLibrary

extends Object

The inner class NativeLibrary denotes a loaded native library instance. Every classloader contains a vector of loaded native libraries in the private field nativeLibraries. The native libraries loaded into the system are entered into the systemNativeLibraries vector.

Every native library reuqires a particular version of JNI. This is denoted by the private jniVersion field. This field is set by the VM when it loads the library, and used by the VM to pass the correct version of JNI to the native methods.

Since:

1.2

See Also:

ClassLoader

Field Summary

private Class	fromClass
(package private) long	handle
private int	jniVersion
(package private) String	name

Constructor Summary

ClassLoader.NativeLibrary(Class fromClass, String name)

Method Summary

protected void	finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
(package private) long	find(String name)
(package private) static Class	getFromClass()
(package private) void	load(String name)
(package private) void	unload()

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

handle

long handle

jniVersion

private int jniVersion

fromClass

private Class fromClass

name

String name

Constructor Detail

ClassLoader.NativeLibrary

public ClassLoader.NativeLibrary(Class fromClass,
                                 String name)

Method Detail

load

void load(String name)

find

long find(String name)

unload

void unload()

finalize

protected void finalize()

Description copied from class: Object

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. A subclass overrides the finalize method to dispose of system resources or to perform other cleanup.

The general contract of finalize is that it is invoked if and when the Java^TM virtual machine has determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, except as a result of an action taken by the finalization of some other object or class which is ready to be finalized. The finalize method may take any action, including making this object available again to other threads; the usual purpose of finalize, however, is to perform cleanup actions before the object is irrevocably discarded. For example, the finalize method for an object that represents an input/output connection might perform explicit I/O transactions to break the connection before the object is permanently discarded.

The finalize method of class Object performs no special action; it simply returns normally. Subclasses of Object may override this definition.

The Java programming language does not guarantee which thread will invoke the finalize method for any given object. It is guaranteed, however, that the thread that invokes finalize will not be holding any user-visible synchronization locks when finalize is invoked. If an uncaught exception is thrown by the finalize method, the exception is ignored and finalization of that object terminates.

After the finalize method has been invoked for an object, no further action is taken until the Java virtual machine has again determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, including possible actions by other objects or classes which are ready to be finalized, at which point the object may be discarded.

The finalize method is never invoked more than once by a Java virtual machine for any given object.

Any exception thrown by the finalize method causes the finalization of this object to be halted, but is otherwise ignored.

Overrides:

finalize in class Object

getFromClass

static Class getFromClass()