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DeviceHandle.java
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96 lines (89 loc) · 2.6 KB
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/*
* Copyright 2013 Klaus Reimer <[email protected]>
* See LICENSE.md for licensing information.
*
* Based on libusb <http://libusb.info/>:
*
* Copyright 2001 Johannes Erdfelt <[email protected]>
* Copyright 2007-2009 Daniel Drake <[email protected]>
* Copyright 2010-2012 Peter Stuge <[email protected]>
* Copyright 2008-2013 Nathan Hjelm <[email protected]>
* Copyright 2009-2013 Pete Batard <[email protected]>
* Copyright 2009-2013 Ludovic Rousseau <[email protected]>
* Copyright 2010-2012 Michael Plante <[email protected]>
* Copyright 2011-2013 Hans de Goede <[email protected]>
* Copyright 2012-2013 Martin Pieuchot <[email protected]>
* Copyright 2012-2013 Toby Gray <[email protected]>
*/
package org.usb4java;
/**
* Structure representing a handle on a USB device.
*
* This is an opaque type for which you are only ever provided with a pointer,
* usually originating from {@link LibUsb#open(Device, DeviceHandle)}.
*
* A device handle is used to perform I/O and other operations. When finished
* with a device handle, you should call {@link LibUsb#close(DeviceHandle)}.
*
* @author Klaus Reimer ([email protected])
*/
public final class DeviceHandle
{
/** The native pointer to the device handle structure. */
private long deviceHandlePointer;
/**
* Constructs a new device handle. Must be passed to
* {@link LibUsb#open(Device, DeviceHandle)} before passing it to any
* other method.
*/
public DeviceHandle()
{
// Empty
}
/**
* Returns the native pointer to the device handle structure.
*
* @return The native pointer to the device handle structure.
*/
public long getPointer()
{
return this.deviceHandlePointer;
}
@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = (prime * result) + (int) (this.deviceHandlePointer ^
(this.deviceHandlePointer >>> 32));
return result;
}
@Override
public boolean equals(final Object obj)
{
if (this == obj)
{
return true;
}
if (obj == null)
{
return false;
}
if (this.getClass() != obj.getClass())
{
return false;
}
final DeviceHandle other = (DeviceHandle) obj;
if (this.deviceHandlePointer != other.deviceHandlePointer)
{
return false;
}
return true;
}
@Override
public String toString()
{
return String.format("libusb device handle 0x%x",
this.deviceHandlePointer);
}
}