ztex

Class ZtexContext

java.lang.Object

ztex.ZtexContext

public class ZtexContext
extends java.lang.Object

This class manages an USB context. Because libusb_get_device_list does not return an up to date device list at least on some implementations a new context must be created every time the bus is (re)discovered, i.e. every time re-numeration occurs. This class creates a new USB context, initializes it and releases it as soon it is not used anymore. Wheter context is used is determined by a reference counter. Reference counter of a new instance is 1.

Constructor Summary

Constructors

Constructor and Description
ZtexContext() Constructs an new USB context and initializes it.

Method Summary

Modifier and Type	Method and Description
org.usb4java.Context	context() Returns the USB context.
protected void	finalize() Releases all resources.
ZtexContext	ref() Increases the reference count.
void	unref() Decreases the reference count and releases the context if reference counter reaches 0.

Methods inherited from class java.lang.Object

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

Constructor Detail

ZtexContext

public ZtexContext()
            throws UsbException

Constructs an new USB context and initializes it.

Throws:

UsbException - if USB context can be initialized

Method Detail

context

public final org.usb4java.Context context()

Returns the USB context.

Returns:

the USB context.

ref

public ZtexContext ref()
                throws UsbException

Increases the reference count.

Returns:

the USB context.

Throws:

UsbException - if USB context can be initialized

unref

public void unref()

Decreases the reference count and releases the context if reference counter reaches 0.

finalize

protected void finalize()
                 throws java.lang.Throwable

Releases all resources.

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable