com.coi.tools.os.izpack
Class COIOSHelper

java.lang.Object
  com.coi.tools.os.izpack.COIOSHelper

public class COIOSHelper
extends java.lang.Object

Base class to handle multiple native methods of multiple classes in one shared library. This is a singelton class.

Author:

Klaus Bartz

Field Summary

private static boolean	destroyed
private boolean	failed
private static COIOSHelper	self
private static int	used

Constructor Summary

private

COIOSHelper() Default constructor, do not use

Method Summary

void	addDependant(NativeLibraryClient dependant) Add a NativeLibraryClient as dependant to this object.
void	freeLibrary(java.lang.String name)
private void	FreeLibrary(java.lang.String name) This method is used to free the library at the end of progam execution.
static COIOSHelper	getInstance() Returns the one existent object of this class.

Methods inherited from class java.lang.Object

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

Field Detail

self

private static COIOSHelper self

used

private static int used

destroyed

private static boolean destroyed

failed

private boolean failed

Constructor Detail

COIOSHelper

private COIOSHelper()

Default constructor, do not use

Method Detail

FreeLibrary

private void FreeLibrary(java.lang.String name)

This method is used to free the library at the end of progam execution. After this call, any instance of this class will not be usable any more!

Parameters:

name - the name of the library to free. Use only the name and extension but not the path.

getInstance

public static COIOSHelper getInstance()

Returns the one existent object of this class.

Returns:

the one existent object of this class

freeLibrary

public void freeLibrary(java.lang.String name)

Parameters:

name -

addDependant

public void addDependant(NativeLibraryClient dependant)
                  throws java.lang.Exception

Add a NativeLibraryClient as dependant to this object. The method tries to load the shared library COIOSHelper which should contain native methods for the dependant.

Parameters:

dependant - to be added

Throws:

java.lang.Exception - if loadLibrary for the needed lib fails