- use getter methods to access Usb_xxx instance variables

git-svn-id: https://svn.code.sf.net/p/libusbjava/code/trunk@220 94ad28fe-ef68-46b1-9651-e7ae4fcf1c4c
2006-11-29 11:44:06 +00:00
parent 9ec7c3c53c
commit af40b52734
12 changed files with 670 additions and 297 deletions
--- a/java/src/ch/ntb/usb/Device.java
+++ b/java/src/ch/ntb/usb/Device.java
@@ -61,21 +61,20 @@ public class Device {
 			throw new USBException("LibusbWin.usb_get_busses(): "
 					+ LibusbJava.usb_strerror());
 		}
-
 		return bus;
 	}

 	private void updateMaxPacketSize(Usb_Device device) throws USBException {
 		maxPacketSize = -1;
-		Usb_Config_Descriptor[] confDesc = device.config;
+		Usb_Config_Descriptor[] confDesc = device.getConfig();
 		for (int i = 0; i < confDesc.length; i++) {
-			Usb_Interface[] int_ = confDesc[i].interface_;
+			Usb_Interface[] int_ = confDesc[i].getInterface();
 			for (int j = 0; j < int_.length; j++) {
-				Usb_Interface_Descriptor[] intDesc = int_[j].altsetting;
+				Usb_Interface_Descriptor[] intDesc = int_[j].getAltsetting();
 				for (int k = 0; k < intDesc.length; k++) {
-					Usb_Endpoint_Descriptor[] epDesc = intDesc[k].endpoint;
+					Usb_Endpoint_Descriptor[] epDesc = intDesc[k].getEndpoint();
 					for (int l = 0; l < epDesc.length; l++) {
-						maxPacketSize = Math.max(epDesc[l].wMaxPacketSize,
+						maxPacketSize = Math.max(epDesc[l].getWMaxPacketSize(),
 								maxPacketSize);
 					}
 				}
@@ -93,18 +92,18 @@ public class Device {
 		Usb_Device device = null;
 		// search for device
 		while (bus != null) {
-			device = bus.devices;
+			device = bus.getDevices();
 			while (device != null) {
-				Usb_Device_Descriptor devDesc = device.descriptor;
-				if ((devDesc.idVendor == idVendor)
-						&& (devDesc.idProduct == idProduct)) {
-					logger.info("Device found: " + device.filename);
+				Usb_Device_Descriptor devDesc = device.getDescriptor();
+				if ((devDesc.getIdVendor() == idVendor)
+						&& (devDesc.getIdProduct() == idProduct)) {
+					logger.info("Device found: " + device.getFilename());
 					updateMaxPacketSize(device);
 					return device;
 				}
-				device = device.next;
+				device = device.getNext();
 			}
-			bus = bus.next;
+			bus = bus.getNext();
 		}
 		return null;
 	}
@@ -134,7 +133,7 @@ public class Device {
 		if (dev == null) {
 			return null;
 		}
-		return dev.descriptor;
+		return dev.getDescriptor();
 	}

 	/**
@@ -149,7 +148,7 @@ public class Device {
 		if (dev == null) {
 			return null;
 		}
-		return dev.config;
+		return dev.getConfig();
 	}

 	/**
--- a/java/src/ch/ntb/usb/Usb_Bus.java
+++ b/java/src/ch/ntb/usb/Usb_Bus.java
@@ -16,27 +16,69 @@ package ch.ntb.usb;
 */
 public class Usb_Bus {

-	/**
-	 * The next and previous bus object
-	 */
-	public Usb_Bus next, prev;
+	private Usb_Bus next, prev;
+
+	private String dirname;
+
+	private Usb_Device devices;
+
+	private long location;
+
+	private Usb_Device root_dev;

 	/**
-	 * Systems String representation of the bus
+	 * Get the first device ojects of the devices linked list.<br>
+	 * 
+	 * @return the first device ojects of the devices linked list or null
 	 */
-	public String dirname;
+	public Usb_Device getDevices() {
+		return devices;
+	}

 	/**
-	 * Device objects attached to this bus
+	 * Returns the systems String representation of the bus.<br>
+	 * 
+	 * @return the systems String representation of the bus
 	 */
-	public Usb_Device devices;
+	public String getDirname() {
+		return dirname;
+	}

 	/**
-	 * Location in the USB bus linked list
+	 * Returns the next bus object.<br>
+	 * 
+	 * @return Returns the next bus object or null
 	 */
-	public long location;
+	public Usb_Bus getNext() {
+		return next;
+	}

-	public Usb_Device root_dev;
+	/**
+	 * Returns the previous bus object.<br>
+	 * 
+	 * @return Returns the previous bus object or null
+	 */
+	public Usb_Bus getPrev() {
+		return prev;
+	}
+
+	/**
+	 * Get the root device of this bus.<br>
+	 * 
+	 * @return the root device oject or null
+	 */
+	public Usb_Device getRootDev() {
+		return root_dev;
+	}
+
+	/**
+	 * Returns the location in the USB bus linked list.<br>
+	 * 
+	 * @return the location in the USB bus linked list
+	 */
+	public long getLocation() {
+		return location;
+	}

 	@Override
 	public String toString() {
--- a/java/src/ch/ntb/usb/Usb_Config_Descriptor.java
+++ b/java/src/ch/ntb/usb/Usb_Config_Descriptor.java
@@ -20,62 +20,119 @@ package ch.ntb.usb;
 public class Usb_Config_Descriptor extends Usb_Descriptor {

 	/**
-	 * Maximum number of configuration per device
+	 * Maximum number of configurations per device
 	 */
 	public static final int USB_MAXCONFIG = 8;

-	/**
-	 * Total length in bytes of data returned.<br>
-	 * When the configuration descriptor is read, it returns the entire
-	 * configuration hierarchy which includes all related interface and endpoint
-	 * descriptors. The <code>wTotalLength</code> field reflects the number of
-	 * bytes in the hierarchy.
-	 */
-	public short wTotalLength;
+	private short wTotalLength;
+
+	private byte bNumInterfaces;
+
+	private byte bConfigurationValue;
+
+	private byte iConfiguration;
+
+	private byte bmAttributes;
+
+	private byte MaxPower;
+
+	private Usb_Interface[] interface_;
+
+	private Usb_Config_Descriptor extra; /* Extra descriptors */
+
+	private int extralen;

 	/**
-	 * Number of interfaces
+	 * Returns the value to use as an argument to select this configuration ({@link LibusbJava#usb_set_configuration(int, int)}).
+	 * 
+	 * @return the value to use as an argument to select this configuration
 	 */
-	public byte bNumInterfaces;
+	public byte getBConfigurationValue() {
+		return bConfigurationValue;
+	}

 	/**
-	 * Value to use as an argument to select this configuration ({@link LibusbJava#usb_set_configuration(int, int)}).
-	 */
-	public byte bConfigurationValue;
-
-	/**
-	 * Index of String descriptor describing this configuration
-	 */
-	public byte iConfiguration;
-
-	/**
-	 * Specifies power parameters for this configuration<br>
+	 * Returns the power parameters for this configuration.<br>
 	 * <br>
 	 * Bit 7: Reserved, set to 1 (USB 1.0 Bus Powered)<br>
 	 * Bit 6: Self Powered<br>
 	 * Bit 5: Remote Wakeup<br>
 	 * Bit 4..0: Reserved, set to 0
+	 * 
+	 * @return the power parameters for this configuration
 	 */
-	public byte bmAttributes;
+	public byte getBmAttributes() {
+		return bmAttributes;
+	}

 	/**
-	 * Maximum power consumption in 2mA units
+	 * Returns the number of interfaces.<br>
+	 * 
+	 * @return the number of interfaces
 	 */
-	public byte MaxPower;
-
-	/**
-	 * USB interface descriptors
-	 */
-	public Usb_Interface[] interface_;
+	public byte getBNumInterfaces() {
+		return bNumInterfaces;
+	}

 	/**
 	 * Extra descriptors are currently not interpreted because of their unknown
 	 * structure.
+	 * 
+	 * @return null
 	 */
-	public Usb_Config_Descriptor extra; /* Extra descriptors */
-	// TODO
+	// TODO: implementation
+	public Usb_Config_Descriptor getExtra() {
+		return extra;
+	}

-	public int extralen;
+	/**
+	 * Returns the number of bytes of the extra descriptor.<br>
+	 * 
+	 * @return the number of bytes of the extra descriptor
+	 */
+	public int getExtralen() {
+		return extralen;
+	}
+
+	/**
+	 * Returns the index of the String descriptor describing this configuration.<br>
+	 * 
+	 * @return the index of the String descriptor
+	 */
+	public byte getIConfiguration() {
+		return iConfiguration;
+	}
+
+	/**
+	 * Returns the USB interface descriptors.<br>
+	 * 
+	 * @return the USB interface descriptors
+	 */
+	public Usb_Interface[] getInterface() {
+		return interface_;
+	}
+
+	/**
+	 * Returns the maximum power consumption in 2mA units.<br>
+	 * 
+	 * @return the maximum power consumption in 2mA units
+	 */
+	public byte getMaxPower() {
+		return MaxPower;
+	}
+
+	/**
+	 * Returns the total length in bytes of all descriptors.<br>
+	 * When the configuration descriptor is read, it returns the entire
+	 * configuration hierarchy which includes all related interface and endpoint
+	 * descriptors. The <code>wTotalLength</code> field reflects the number of
+	 * bytes in the hierarchy.
+	 * 
+	 * @return the total length in bytes of all descriptors
+	 */
+	public short getWTotalLength() {
+		return wTotalLength;
+	}

 	@Override
 	public String toString() {
--- a/java/src/ch/ntb/usb/Usb_Descriptor.java
+++ b/java/src/ch/ntb/usb/Usb_Descriptor.java
@@ -35,14 +35,26 @@ public class Usb_Descriptor {
 			USB_DT_ENDPOINT_AUDIO_SIZE = 9 /* Audio extension */,
 			USB_DT_HUB_NONVAR_SIZE = 7;

-	/**
-	 * Size of descriptor in bytes
-	 */
-	public byte bLength;
+	private byte bLength;
+
+	private byte bDescriptorType;

 	/**
-	 * Type of descriptor
+	 * Get the type of this descriptor.<br>
+	 * 
+	 * @return the type of this descriptor
 	 */
-	public byte bDescriptorType;
+	public byte getBDescriptorType() {
+		return bDescriptorType;
+	}
+
+	/**
+	 * Get the size of this descriptor in bytes.<br>
+	 * 
+	 * @return the size of this descriptor in bytes
+	 */
+	public byte getBLength() {
+		return bLength;
+	}

 }
--- a/java/src/ch/ntb/usb/Usb_Device.java
+++ b/java/src/ch/ntb/usb/Usb_Device.java
@@ -16,49 +16,105 @@ package ch.ntb.usb;
 */
 public class Usb_Device {

-	/**
-	 * Pointers to the next and previous device
-	 */
-	public Usb_Device next, prev;
+	private Usb_Device next, prev;
+
+	private String filename;
+
+	private Usb_Bus bus;
+
+	private Usb_Device_Descriptor descriptor;
+
+	private Usb_Config_Descriptor[] config;
+
+	private byte devnum;
+
+	private byte num_children;
+
+	private Usb_Device children;

 	/**
-	 * Systems String representation
+	 * Returns the reference to the bus to which this device is connected.<br>
+	 * 
+	 * @return the reference to the bus to which this device is connected
 	 */
-	public String filename;
+	public Usb_Bus getBus() {
+		return bus;
+	}

 	/**
-	 * Reference to the bus to which this device is connected
+	 * Returns a reference to the first child.<br>
+	 * 
+	 * @return a reference to the first child
 	 */
-	public Usb_Bus bus;
+	public Usb_Device getChildren() {
+		return children;
+	}

 	/**
-	 * USB device descriptor
+	 * Returns the USB config descriptors.<br>
+	 * 
+	 * @return the USB config descriptors
 	 */
-	public Usb_Device_Descriptor descriptor;
+	public Usb_Config_Descriptor[] getConfig() {
+		return config;
+	}

 	/**
-	 * USB config descriptors
+	 * Returns the USB device descriptor.<br>
+	 * 
+	 * @return the USB device descriptor
 	 */
-	public Usb_Config_Descriptor[] config;
+	public Usb_Device_Descriptor getDescriptor() {
+		return descriptor;
+	}

 	/**
-	 * Number assigned to this device
+	 * Returns the number assigned to this device.<br>
+	 * 
+	 * @return the number assigned to this device
 	 */
-	public byte devnum;
+	public byte getDevnum() {
+		return devnum;
+	}

 	/**
-	 * Number of children of this device
+	 * Returns the systems String representation.<br>
+	 * 
+	 * @return the systems String representation
 	 */
-	public byte num_children;
+	public String getFilename() {
+		return filename;
+	}

 	/**
-	 * Reference to the first child
+	 * Returns the pointer to the next device.<br>
+	 * 
+	 * @return the pointer to the next device or null
 	 */
-	public Usb_Device children;
+	public Usb_Device getNext() {
+		return next;
+	}
+
+	/**
+	 * Returns the number of children of this device.<br>
+	 * 
+	 * @return the number of children of this device
+	 */
+	public byte getNumChildren() {
+		return num_children;
+	}
+
+	/**
+	 * Returns the pointer to the previous device.<br>
+	 * 
+	 * @return the pointer to the previous device or null
+	 */
+	public Usb_Device getPrev() {
+		return prev;
+	}

 	@Override
 	public String toString() {
 		return "Usb_Device " + filename;
 	}
-
 }
--- a/java/src/ch/ntb/usb/Usb_Device_Descriptor.java
+++ b/java/src/ch/ntb/usb/Usb_Device_Descriptor.java
@@ -27,79 +27,158 @@ public class Usb_Device_Descriptor extends Usb_Descriptor {
 			USB_CLASS_MASS_STORAGE = 8, USB_CLASS_HUB = 9, USB_CLASS_DATA = 10,
 			USB_CLASS_VENDOR_SPEC = 0xff;

+	private short bcdUSB;
+
+	private byte bDeviceClass;
+
+	private byte bDeviceSubClass;
+
+	private byte bDeviceProtocol;
+
+	private byte bMaxPacketSize0;
+
+	private short idVendor;
+
+	private short idProduct;
+
+	private short bcdDevice;
+
+	private byte iManufacturer;
+
+	private byte iProduct;
+
+	private byte iSerialNumber;
+
+	private byte bNumConfigurations;
+
 	/**
-	 * USB Specification number to which the device complies to.<br>
+	 * Returns the device release number.<br>
+	 * Assigned by the manufacturer of the device.
+	 * 
+	 * @return the device release number
+	 */
+	public short getBcdDevice() {
+		return bcdDevice;
+	}
+
+	/**
+	 * Returns the USB specification number to which the device complies to.<br>
 	 * This field reports the highest version of USB the device supports. The
 	 * value is in binary coded decimal with a format of 0xJJMN where JJ is the
 	 * major version number, M is the minor version number and N is the sub
 	 * minor version number.<br>
 	 * Examples: USB 2.0 is reported as 0x0200, USB 1.1 as 0x0110 and USB 1.0 as
 	 * 0x100
+	 * 
+	 * @return the USB specification number to which the device complies to
 	 */
-	public short bcdUSB;
+	public short getBcdUSB() {
+		return bcdUSB;
+	}

 	/**
-	 * Class code (Assigned by <a href="http://www.usb.org">www.usb.org</a>)<br>
+	 * Returns the class code (Assigned by <a
+	 * href="http://www.usb.org">www.usb.org</a>)<br>
 	 * If equal to zero, each interface specifies it's own class code. If equal
 	 * to 0xFF, the class code is vendor specified. Otherwise the field is a
 	 * valid class code.
+	 * 
+	 * @return the class code
 	 */
-	public byte bDeviceClass;
+	public byte getBDeviceClass() {
+		return bDeviceClass;
+	}

 	/**
-	 * Subclass code (Assigned by <a href="http://www.usb.org">www.usb.org</a>)<br>
+	 * Returns the protocol code (Assigned by <a
+	 * href="http://www.usb.org">www.usb.org</a>)<br>
+	 * 
+	 * @return the protocol code
 	 */
-	public byte bDeviceSubClass;
+	public byte getBDeviceProtocol() {
+		return bDeviceProtocol;
+	}

 	/**
-	 * Protocol code (Assigned by <a href="http://www.usb.org">www.usb.org</a>)<br>
+	 * Returns the subclass code (Assigned by <a
+	 * href="http://www.usb.org">www.usb.org</a>)<br>
+	 * 
+	 * @return the subclass code
 	 */
-	public byte bDeviceProtocol;
+	public byte getBDeviceSubClass() {
+		return bDeviceSubClass;
+	}

 	/**
-	 * Maximum packet size for endpoint zero. <br>
+	 * Returns the maximum packet size for endpoint zero.<br>
 	 * Valid sizes are 8, 16, 32, 64.
+	 * 
+	 * @return the maximum packet size for endpoint zero
 	 */
-	public byte bMaxPacketSize0;
+	public byte getBMaxPacketSize0() {
+		return bMaxPacketSize0;
+	}

 	/**
-	 * Vendor ID (Assigned by <a href="http://www.usb.org">www.usb.org</a>)<br>
+	 * Returns the number of possible configurations supported at its current
+	 * speed.<br>
+	 * 
+	 * @return the number of possible configurations supported at its current
+	 *         speed
 	 */
-	public short idVendor;
+	public byte getBNumConfigurations() {
+		return bNumConfigurations;
+	}

 	/**
-	 * Product ID (Assigned by <a href="http://www.usb.org">www.usb.org</a>)<br>
+	 * Returns the product ID (Assigned by <a
+	 * href="http://www.usb.org">www.usb.org</a>)<br>
+	 * 
+	 * @return the product ID
 	 */
-	public short idProduct;
+	public short getIdProduct() {
+		return idProduct;
+	}

 	/**
-	 * Device release number<br>
-	 * Assigned by the manufacturer of the device.
+	 * Returns the Vendor ID (Assigned by <a
+	 * href="http://www.usb.org">www.usb.org</a>)<br>
+	 * 
+	 * @return the Vendor ID
 	 */
-	public short bcdDevice;
+	public short getIdVendor() {
+		return idVendor;
+	}

 	/**
-	 * Index of manufacturer string descriptor<br>
+	 * Returns the index of the manufacturer string descriptor.<br>
 	 * If this value is 0, no string descriptor is used.
+	 * 
+	 * @return the index of the manufacturer string descriptor
 	 */
-	public byte iManufacturer;
+	public byte getIManufacturer() {
+		return iManufacturer;
+	}

 	/**
-	 * Index of product string descriptor<br>
+	 * Returns the index of the product string descriptor.<br>
 	 * If this value is 0, no string descriptor is used.
+	 * 
+	 * @return the index of the product string descriptor
 	 */
-	public byte iProduct;
+	public byte getIProduct() {
+		return iProduct;
+	}

 	/**
-	 * Index of serial number string descriptor<br>
+	 * Returns the index of serial number string descriptor.<br>
 	 * If this value is 0, no string descriptor is used.
+	 * 
+	 * @return the index of serial number string descriptor
 	 */
-	public byte iSerialNumber;
-
-	/**
-	 * Number of possible configurations supported at its current speed
-	 */
-	public byte bNumConfigurations;
+	public byte getISerialNumber() {
+		return iSerialNumber;
+	}

 	@Override
 	public String toString() {
--- a/java/src/ch/ntb/usb/Usb_Endpoint_Descriptor.java
+++ b/java/src/ch/ntb/usb/Usb_Endpoint_Descriptor.java
@@ -7,7 +7,7 @@
 package ch.ntb.usb;

 /**
- * Represents the descriptor of a USB endpoint.<br>
+ * Represents the descriptor of an USB endpoint.<br>
 * Endpoint descriptors are used to describe endpoints other than endpoint zero.
 * Endpoint zero is always assumed to be a control endpoint and is configured
 * before any descriptors are even requested. The host will use the information
@@ -38,7 +38,7 @@ public class Usb_Endpoint_Descriptor extends Usb_Descriptor {
 	 * Endpoint type mask (in bmAttributes).
 	 */
 	public static final int USB_ENDPOINT_TYPE_MASK = 0x03;
-	
+
 	/**
 	 * Possible endpoint types (in bmAttributes).
 	 */
@@ -46,60 +46,110 @@ public class Usb_Endpoint_Descriptor extends Usb_Descriptor {
 			USB_ENDPOINT_TYPE_ISOCHRONOUS = 1, USB_ENDPOINT_TYPE_BULK = 2,
 			USB_ENDPOINT_TYPE_INTERRUPT = 3;

+	private byte bEndpointAddress;
+
+	private byte bmAttributes;
+
+	private short wMaxPacketSize;
+
+	private byte bInterval;
+
+	private byte bRefresh;
+
+	private byte bSynchAddress;
+
+	private Usb_Endpoint_Descriptor extra; /* Extra descriptors */
+
+	private int extralen;
+
 	/**
-	 * Endpoint Address<br>
+	 * Returns the endpoint address.<br>
 	 * <br>
 	 * Bits 3..0: Endpoint number <br>
 	 * Bits 6..4: Reserved. Set to zero <br>
 	 * Bit 7: Direction. 0 = Out, 1 = In (ignored for control endpoints)<br>
+	 * 
+	 * @return the endpoint address
 	 */
-	public byte bEndpointAddress;
+	public byte getBEndpointAddress() {
+		return bEndpointAddress;
+	}

 	/**
+	 * Returns the intervall for polling endpoint data transfers.<br>
+	 * Value in frame counts. Ignored for Bulk & Control eEndpoints. Isochronous
+	 * endpoints must equal 1 and field may range from 1 to 255 for interrupt
+	 * endpoints.
+	 * 
+	 * @return the intervall for polling endpoint data transfers
+	 */
+	public byte getBInterval() {
+		return bInterval;
+	}
+
+	/**
+	 * Returns the attributes of this endpoint.<br>
+	 * 
 	 * Bits 1..0: Transfer Type (see <i>USB_ENDPOINT_TYPE_XXX</i>).<br>
 	 * Bits 7..2: Reserved.<br>
 	 * 
 	 * <pre>
-	 * If isochronous endpoint:
+	 * 	If isochronous endpoint:
 	 * 		Bits 3..2: Synchronisation type
-	 * 			00 = No synchronisation
+	 *  		00 = No synchronisation
 	 * 			01 = Asynchronous
-	 * 			10 = Adaptive
-	 * 			11 = Synchronous
-	 * 		Bits 5..4: Usage Type
-	 * 			00 = Data endpoint
-	 * 			01 = Feedback endpoint
-	 * 			10 = Explicit feedback data endpoint
-	 * 			11 = Reserved
+	 *          10 = Adaptive
+	 *          11 = Synchronous
+	 *     	Bits 5..4: Usage Type
+	 *      	00 = Data endpoint
+	 *      	01 = Feedback endpoint
+	 *      	10 = Explicit feedback data endpoint
+	 *      	11 = Reserved
 	 * </pre>
+	 * 
+	 * @return the attributes of this endpoint
 	 */
-	public byte bmAttributes;
+	public byte getBmAttributes() {
+		return bmAttributes;
+	}

-	/**
-	 * Maximum packet size this endpoint is capable of sending or receiving
-	 */
-	public short wMaxPacketSize;
+	public byte getBRefresh() {
+		return bRefresh;
+	}

-	/**
-	 * Intervall for polling endpoint data transfers.<br>
-	 * Value in frame counts. Ignored for Bulk & Control eEndpoints. Isochronous
-	 * endpoints must equal 1 and field may range from 1 to 255 for interrupt
-	 * endpoints.
-	 */
-	public byte bInterval;
-
-	public byte bRefresh;
-
-	public byte bSynchAddress;
+	public byte getBSynchAddress() {
+		return bSynchAddress;
+	}

 	/**
 	 * Extra descriptors are currently not interpreted because of their unknown
 	 * structure.
+	 * 
+	 * @return null
 	 */
-	public Usb_Endpoint_Descriptor extra; /* Extra descriptors */
-	// TODO
+	// TODO: implementation
+	public Usb_Endpoint_Descriptor getExtra() {
+		return extra;
+	}

-	public int extralen;
+	/**
+	 * Returns the number of bytes of the extra descriptor.<br>
+	 * 
+	 * @return the number of bytes of the extra descriptor
+	 */
+	public int getExtralen() {
+		return extralen;
+	}
+
+	/**
+	 * Returns the maximum packet size of this endpoint is capable of sending or
+	 * receiving.<br>
+	 * 
+	 * @return the maximum packet size
+	 */
+	public short getWMaxPacketSize() {
+		return wMaxPacketSize;
+	}

 	@Override
 	public String toString() {
--- a/java/src/ch/ntb/usb/Usb_Interface.java
+++ b/java/src/ch/ntb/usb/Usb_Interface.java
@@ -20,15 +20,9 @@ public class Usb_Interface {
 	 */
 	public static final int USB_MAXALTSETTING = 128; /* Hard limit */

-	/**
-	 * Interface descriptors
-	 */
-	public Usb_Interface_Descriptor[] altsetting;
+	private Usb_Interface_Descriptor[] altsetting;

-	/**
-	 * Number of alternate settings
-	 */
-	public int num_altsetting;
+	private int num_altsetting;

 	@Override
 	public String toString() {
@@ -36,4 +30,22 @@ public class Usb_Interface {
 				+ Integer.toHexString(num_altsetting);
 	}

+	/**
+	 * Retuns an array of interface descriptors.<br>
+	 * 
+	 * @return an array of interface descriptors
+	 */
+	public Usb_Interface_Descriptor[] getAltsetting() {
+		return altsetting;
+	}
+
+	/**
+	 * Returns the number of alternate settings.<br>
+	 * 
+	 * @return the number of alternate settings
+	 */
+	public int getNumAltsetting() {
+		return num_altsetting;
+	}
+
 }
--- a/java/src/ch/ntb/usb/Usb_Interface_Descriptor.java
+++ b/java/src/ch/ntb/usb/Usb_Interface_Descriptor.java
@@ -21,62 +21,128 @@ package ch.ntb.usb;
 public class Usb_Interface_Descriptor extends Usb_Descriptor {

 	/**
-	 * Maximal number of interfaces
+	 * Maximum number of interfaces
 	 */
 	public static final int USB_MAXINTERFACES = 32;

-	/**
-	 * Number (identifier) of interface
-	 */
-	public byte bInterfaceNumber;
+	private byte bInterfaceNumber;

-	/**
-	 * Value used to select alternate setting ({@link LibusbJava#usb_set_altinterface(int, int)}).
-	 */
-	public byte bAlternateSetting;
+	private byte bAlternateSetting;

-	/**
-	 * Number of Endpoints used for this interface
-	 */
-	public byte bNumEndpoints;
+	private byte bNumEndpoints;

-	/**
-	 * Class code (Assigned by <a href="http://www.usb.org">www.usb.org</a>)<br>
-	 */
-	public byte bInterfaceClass;
+	private byte bInterfaceClass;

-	/**
-	 * Subclass code (Assigned by <a href="http://www.usb.org">www.usb.org</a>)<br>
-	 */
-	public byte bInterfaceSubClass;
+	private byte bInterfaceSubClass;

-	/**
-	 * Protocol code (Assigned by <a href="http://www.usb.org">www.usb.org</a>)<br>
-	 */
-	public byte bInterfaceProtocol;
+	private byte bInterfaceProtocol;

-	/**
-	 * Index of String descriptor describing this interface
-	 */
-	public byte iInterface;
+	private byte iInterface;

-	/**
-	 * Endpoint descriptors
-	 */
-	public Usb_Endpoint_Descriptor[] endpoint;
+	private Usb_Endpoint_Descriptor[] endpoint;

-	/**
-	 * Extra descriptors are currently not interpreted because of their unknown
-	 * structure.
-	 */
-	public Usb_Interface_Descriptor extra; /* Extra descriptors */
-	// TODO
+	private Usb_Interface_Descriptor extra; /* Extra descriptors */

-	public int extralen;
+	private int extralen;

 	@Override
 	public String toString() {
 		return "Usb_Interface_Descriptor bNumEndpoints: 0x"
 				+ Integer.toHexString(bNumEndpoints);
 	}
+
+	/**
+	 * Returns the value used to select the alternate setting ({@link LibusbJava#usb_set_altinterface(int, int)}).<br>
+	 * 
+	 * @return the alternate setting
+	 */
+	public byte getBAlternateSetting() {
+		return bAlternateSetting;
+	}
+
+	/**
+	 * Returns the class code (Assigned by <a
+	 * href="http://www.usb.org">www.usb.org</a>).<br>
+	 * 
+	 * @return the class code
+	 */
+	public byte getBInterfaceClass() {
+		return bInterfaceClass;
+	}
+
+	/**
+	 * Returns the number (identifier) of this interface.<br>
+	 * 
+	 * @return the number (identifier) of this interface
+	 */
+	public byte getBInterfaceNumber() {
+		return bInterfaceNumber;
+	}
+
+	/**
+	 * Returns the protocol code (Assigned by <a
+	 * href="http://www.usb.org">www.usb.org</a>).<br>
+	 * 
+	 * @return the protocol code
+	 */
+	public byte getBInterfaceProtocol() {
+		return bInterfaceProtocol;
+	}
+
+	/**
+	 * Returns the subclass code (Assigned by <a
+	 * href="http://www.usb.org">www.usb.org</a>).<br>
+	 * 
+	 * @return the subclass code
+	 */
+	public byte getBInterfaceSubClass() {
+		return bInterfaceSubClass;
+	}
+
+	/**
+	 * Returns the number of endpoints used for this interface.<br>
+	 * 
+	 * @return the number of endpoints used for this interface
+	 */
+	public byte getBNumEndpoints() {
+		return bNumEndpoints;
+	}
+
+	/**
+	 * Returns an array of endpoint descriptors.<br>
+	 * 
+	 * @return an array of endpoint descriptors
+	 */
+	public Usb_Endpoint_Descriptor[] getEndpoint() {
+		return endpoint;
+	}
+
+	/**
+	 * Extra descriptors are currently not interpreted because of their unknown
+	 * structure.
+	 * 
+	 * @return null
+	 */
+	// TODO: implementation
+	public Usb_Interface_Descriptor getExtra() {
+		return extra;
+	}
+
+	/**
+	 * Returns the number of bytes of the extra descriptor.<br>
+	 * 
+	 * @return the number of bytes of the extra descriptor
+	 */
+	public int getExtralen() {
+		return extralen;
+	}
+
+	/**
+	 * Returns the index of the String descriptor describing this interface.<br>
+	 * 
+	 * @return the index of the String descriptor
+	 */
+	public byte getIInterface() {
+		return iInterface;
+	}
 }
--- a/java/src/ch/ntb/usb/Utils.java
+++ b/java/src/ch/ntb/usb/Utils.java
@@ -12,26 +12,26 @@ public class Utils {
 		Usb_Bus usb_Bus = bus;
 		while (usb_Bus != null) {
 			System.out.println(usb_Bus.toString());
-			Usb_Device dev = usb_Bus.devices;
+			Usb_Device dev = usb_Bus.getDevices();
 			while (dev != null) {
 				System.out.println("\t" + dev.toString());
 				// Usb_Device_Descriptor
-				Usb_Device_Descriptor defDesc = dev.descriptor;
+				Usb_Device_Descriptor defDesc = dev.getDescriptor();
 				System.out.println("\t\t" + defDesc.toString());
 				// Usb_Config_Descriptor
-				Usb_Config_Descriptor[] confDesc = dev.config;
+				Usb_Config_Descriptor[] confDesc = dev.getConfig();
 				for (int i = 0; i < confDesc.length; i++) {
 					System.out.println("\t\t" + confDesc[i].toString());
-					Usb_Interface[] int_ = confDesc[i].interface_;
+					Usb_Interface[] int_ = confDesc[i].getInterface();
 					if (int_ != null) {
 						for (int j = 0; j < int_.length; j++) {
 							System.out.println("\t\t\t" + int_[j].toString());
-							Usb_Interface_Descriptor[] intDesc = int_[j].altsetting;
+							Usb_Interface_Descriptor[] intDesc = int_[j].getAltsetting();
 							if (intDesc != null) {
 								for (int k = 0; k < intDesc.length; k++) {
 									System.out.println("\t\t\t\t"
 											+ intDesc[k].toString());
-									Usb_Endpoint_Descriptor[] epDesc = intDesc[k].endpoint;
+									Usb_Endpoint_Descriptor[] epDesc = intDesc[k].getEndpoint();
 									if (epDesc != null) {
 										for (int e = 0; e < epDesc.length; e++) {
 											System.out.println("\t\t\t\t\t"
@@ -43,9 +43,9 @@ public class Utils {
 						}
 					}
 				}
-				dev = dev.next;
+				dev = dev.getNext();
 			}
-			usb_Bus = usb_Bus.next;
+			usb_Bus = usb_Bus.getNext();
 		}
 	}
 }
--- a/java/src/ch/ntb/usb/usbView/UsbTreeModel.java
+++ b/java/src/ch/ntb/usb/usbView/UsbTreeModel.java
@@ -59,37 +59,37 @@ public class UsbTreeModel implements TreeModel, TreeSelectionListener {
 	 */
 	public Object getChild(Object parent, int index) {
 		if (parent instanceof Usb_Bus) {
-			Usb_Device device = ((Usb_Bus) parent).devices;
+			Usb_Device device = ((Usb_Bus) parent).getDevices();
 			int count = 0;
 			while (device != null) {
 				if (count == index)
 					return device;
 				count++;
-				device = device.next;
+				device = device.getNext();
 			}
 			return null;
 		} else if (parent instanceof Usb_Device) {
 			Usb_Device dev = (Usb_Device) parent;
 			// return the Usb_Device_Descriptor at index 0
 			if (index == 0) {
-				return dev.descriptor;
+				return dev.getDescriptor();
 			}
-			Usb_Config_Descriptor[] confDescs = dev.config;
+			Usb_Config_Descriptor[] confDescs = dev.getConfig();
 			if (index >= confDescs.length + 1)
 				return null;
 			return confDescs[index - 1];
 		} else if (parent instanceof Usb_Config_Descriptor) {
-			Usb_Interface[] intDescs = ((Usb_Config_Descriptor) parent).interface_;
+			Usb_Interface[] intDescs = ((Usb_Config_Descriptor) parent).getInterface();
 			if (index >= intDescs.length)
 				return null;
 			return intDescs[index];
 		} else if (parent instanceof Usb_Interface) {
-			Usb_Interface_Descriptor[] altSettings = ((Usb_Interface) parent).altsetting;
+			Usb_Interface_Descriptor[] altSettings = ((Usb_Interface) parent).getAltsetting();
 			if (index >= altSettings.length)
 				return null;
 			return altSettings[index];
 		} else if (parent instanceof Usb_Interface_Descriptor) {
-			Usb_Endpoint_Descriptor[] endpoints = ((Usb_Interface_Descriptor) parent).endpoint;
+			Usb_Endpoint_Descriptor[] endpoints = ((Usb_Interface_Descriptor) parent).getEndpoint();
 			if (index >= endpoints.length)
 				return null;
 			return endpoints[index];
@@ -102,22 +102,22 @@ public class UsbTreeModel implements TreeModel, TreeSelectionListener {
 	 */
 	public int getChildCount(Object parent) {
 		if (parent instanceof Usb_Bus) {
-			Usb_Device device = ((Usb_Bus) parent).devices;
+			Usb_Device device = ((Usb_Bus) parent).getDevices();
 			int count = 0;
 			while (device != null) {
 				count++;
-				device = device.next;
+				device = device.getNext();
 			}
 			return count;
 		} else if (parent instanceof Usb_Device) {
 			// add the Usb_Device_Descriptor
-			return ((Usb_Device) parent).config.length + 1;
+			return ((Usb_Device) parent).getConfig().length + 1;
 		} else if (parent instanceof Usb_Config_Descriptor) {
-			return ((Usb_Config_Descriptor) parent).interface_.length;
+			return ((Usb_Config_Descriptor) parent).getInterface().length;
 		} else if (parent instanceof Usb_Interface) {
-			return ((Usb_Interface) parent).altsetting.length;
+			return ((Usb_Interface) parent).getAltsetting().length;
 		} else if (parent instanceof Usb_Interface_Descriptor) {
-			return ((Usb_Interface_Descriptor) parent).endpoint.length;
+			return ((Usb_Interface_Descriptor) parent).getEndpoint().length;
 		}
 		return 0;
 	}
@@ -172,59 +172,59 @@ public class UsbTreeModel implements TreeModel, TreeSelectionListener {
 		if (component instanceof Usb_Bus) {
 			Usb_Bus bus = (Usb_Bus) component;
 			StringBuffer sb = new StringBuffer("Usb_Bus\n");
-			sb.append("\tdirname: " + bus.dirname + "\n");
-			sb.append("\tlocation: 0x" + Long.toHexString(bus.location) + "\n");
+			sb.append("\tdirname: " + bus.getDirname() + "\n");
+			sb.append("\tlocation: 0x" + Long.toHexString(bus.getLocation()) + "\n");
 			textArea.setText(sb.toString());
 		} else if (component instanceof Usb_Device) {
 			Usb_Device device = (Usb_Device) component;
 			StringBuffer sb = new StringBuffer("Usb_Device\n");
-			sb.append("\tfilename: " + device.filename + "\n");
-			sb.append("\tdevnum: " + device.devnum + "\n");
-			sb.append("\tnum_children: " + device.num_children + "\n");
+			sb.append("\tfilename: " + device.getFilename() + "\n");
+			sb.append("\tdevnum: " + device.getDevnum() + "\n");
+			sb.append("\tnum_children: " + device.getNumChildren() + "\n");
 			textArea.setText(sb.toString());
 		} else if (component instanceof Usb_Device_Descriptor) {
 			Usb_Device_Descriptor devDesc = (Usb_Device_Descriptor) component;
 			StringBuffer sb = new StringBuffer("Usb_Device_Descriptor\n");
-			sb.append("\tblenght: 0x" + Integer.toHexString(devDesc.bLength)
+			sb.append("\tblenght: 0x" + Integer.toHexString(devDesc.getBLength())
 					+ "\n");
 			sb.append("\tbDescriptorType: 0x"
-					+ Integer.toHexString(devDesc.bDescriptorType) + "\n");
+					+ Integer.toHexString(devDesc.getBDescriptorType()) + "\n");
 			sb.append("\tbcdUSB: 0x"
-					+ Integer.toHexString(devDesc.bcdUSB & 0xFFFF) + "\n");
+					+ Integer.toHexString(devDesc.getBcdUSB() & 0xFFFF) + "\n");
 			sb.append("\tbDeviceClass: 0x"
-					+ Integer.toHexString(devDesc.bDeviceClass & 0xFF) + "\n");
+					+ Integer.toHexString(devDesc.getBDeviceClass() & 0xFF) + "\n");
 			sb.append("\tbDeviceSubClass: 0x"
-					+ Integer.toHexString(devDesc.bDeviceSubClass & 0xFF)
+					+ Integer.toHexString(devDesc.getBDeviceSubClass() & 0xFF)
 					+ "\n");
 			sb.append("\tbDeviceProtocol: 0x"
-					+ Integer.toHexString(devDesc.bDeviceProtocol & 0xFF)
+					+ Integer.toHexString(devDesc.getBDeviceProtocol() & 0xFF)
 					+ "\n");
 			sb.append("\tbMaxPacketSize0: 0x"
-					+ Integer.toHexString(devDesc.bMaxPacketSize0 & 0xFF)
-					+ " (" + devDesc.bMaxPacketSize0 + ")\n");
+					+ Integer.toHexString(devDesc.getBMaxPacketSize0() & 0xFF)
+					+ " (" + devDesc.getBMaxPacketSize0() + ")\n");
 			sb.append("\tidVendor: 0x"
-					+ Integer.toHexString(devDesc.idVendor & 0xFFFF) + "\n");
+					+ Integer.toHexString(devDesc.getIdVendor() & 0xFFFF) + "\n");
 			sb.append("\tidProduct: 0x"
-					+ Integer.toHexString(devDesc.idProduct & 0xFFFF) + "\n");
+					+ Integer.toHexString(devDesc.getIdProduct() & 0xFFFF) + "\n");
 			sb.append("\tbcdDevice: 0x"
-					+ Integer.toHexString(devDesc.bcdDevice) + "\n");
+					+ Integer.toHexString(devDesc.getBcdDevice()) + "\n");
 			sb.append("\tiManufacturer: 0x"
-					+ Integer.toHexString(devDesc.iManufacturer) + "\n");
-			sb.append("\tiProduct: 0x" + Integer.toHexString(devDesc.iProduct)
+					+ Integer.toHexString(devDesc.getIManufacturer()) + "\n");
+			sb.append("\tiProduct: 0x" + Integer.toHexString(devDesc.getIProduct())
 					+ "\n");
 			sb.append("\tiSerialNumber: 0x"
-					+ Integer.toHexString(devDesc.iSerialNumber) + "\n");
+					+ Integer.toHexString(devDesc.getISerialNumber()) + "\n");
 			sb.append("\tbNumConfigurations: 0x"
-					+ Integer.toHexString(devDesc.bNumConfigurations) + "\n");
+					+ Integer.toHexString(devDesc.getBNumConfigurations()) + "\n");
 			// get device handle to retrieve string descriptors
 			Usb_Bus bus = rootBus;
 			while (bus != null) {
-				Usb_Device dev = bus.devices;
+				Usb_Device dev = bus.getDevices();
 				while (dev != null) {
-					Usb_Device_Descriptor tmpDevDesc = dev.descriptor;
-					if ((dev.descriptor != null)
-							&& ((dev.descriptor.iManufacturer > 0)
-									|| (dev.descriptor.iProduct > 0) || (dev.descriptor.iSerialNumber > 0))) {
+					Usb_Device_Descriptor tmpDevDesc = dev.getDescriptor();
+					if ((dev.getDescriptor() != null)
+							&& ((dev.getDescriptor().getIManufacturer() > 0)
+									|| (dev.getDescriptor().getIProduct() > 0) || (dev.getDescriptor().getISerialNumber() > 0))) {
 						if (tmpDevDesc.equals(devDesc)) {
 							int handle = LibusbJava.usb_open(dev);
 							sb.append("\nString descriptors\n");
@@ -232,27 +232,27 @@ public class UsbTreeModel implements TreeModel, TreeSelectionListener {
 								sb.append("\terror opening the device\n");
 								break;
 							}
-							if (dev.descriptor.iManufacturer > 0) {
+							if (dev.getDescriptor().getIManufacturer() > 0) {
 								String manufacturer = LibusbJava
 										.usb_get_string_simple(handle,
-												devDesc.iManufacturer);
+												devDesc.getIManufacturer());
 								if (manufacturer == null)
 									manufacturer = "unable to fetch manufacturer string";
 								sb.append("\tiManufacturer: " + manufacturer
 										+ "\n");
 							}
-							if (dev.descriptor.iProduct > 0) {
+							if (dev.getDescriptor().getIProduct() > 0) {
 								String product = LibusbJava
 										.usb_get_string_simple(handle,
-												devDesc.iProduct);
+												devDesc.getIProduct());
 								if (product == null)
 									product = "unable to fetch product string";
 								sb.append("\tiProduct: " + product + "\n");
 							}
-							if (dev.descriptor.iSerialNumber > 0) {
+							if (dev.getDescriptor().getISerialNumber() > 0) {
 								String serialNumber = LibusbJava
 										.usb_get_string_simple(handle,
-												devDesc.iSerialNumber);
+												devDesc.getISerialNumber());
 								if (serialNumber == null)
 									serialNumber = "unable to fetch serial number string";
 								sb.append("\tiSerialNumber: " + serialNumber
@@ -261,41 +261,41 @@ public class UsbTreeModel implements TreeModel, TreeSelectionListener {
 							LibusbJava.usb_close(handle);
 						}
 					}
-					dev = dev.next;
+					dev = dev.getNext();
 				}
-				bus = bus.next;
+				bus = bus.getNext();
 			}
 			textArea.setText(sb.toString());
 		} else if (component instanceof Usb_Config_Descriptor) {
 			Usb_Config_Descriptor confDesc = (Usb_Config_Descriptor) component;
 			StringBuffer sb = new StringBuffer("Usb_Config_Descriptor\n");
-			sb.append("\tblenght: 0x" + Integer.toHexString(confDesc.bLength)
+			sb.append("\tblenght: 0x" + Integer.toHexString(confDesc.getBLength())
 					+ "\n");
 			sb.append("\tbDescriptorType: 0x"
-					+ Integer.toHexString(confDesc.bDescriptorType) + "\n");
+					+ Integer.toHexString(confDesc.getBDescriptorType()) + "\n");
 			sb.append("\tbNumInterfaces: 0x"
-					+ Integer.toHexString(confDesc.bNumInterfaces) + "\n");
+					+ Integer.toHexString(confDesc.getBNumInterfaces()) + "\n");
 			sb.append("\tbConfigurationValue: 0x"
-					+ Integer.toHexString(confDesc.bConfigurationValue) + "\n");
+					+ Integer.toHexString(confDesc.getBConfigurationValue()) + "\n");
 			sb.append("\tiConfiguration: 0x"
-					+ Integer.toHexString(confDesc.iConfiguration) + "\n");
+					+ Integer.toHexString(confDesc.getIConfiguration()) + "\n");
 			sb.append("\tbmAttributes: 0x"
-					+ Integer.toHexString(confDesc.bmAttributes & 0xFF) + "\n");
+					+ Integer.toHexString(confDesc.getBmAttributes() & 0xFF) + "\n");
 			sb.append("\tMaxPower [mA]: 0x"
-					+ Integer.toHexString(confDesc.MaxPower & 0xFF) + " ("
-					+ confDesc.MaxPower + ")\n");
-			sb.append("\textralen: 0x" + Integer.toHexString(confDesc.extralen)
+					+ Integer.toHexString(confDesc.getMaxPower() & 0xFF) + " ("
+					+ confDesc.getMaxPower() + ")\n");
+			sb.append("\textralen: 0x" + Integer.toHexString(confDesc.getExtralen())
 					+ "\n");
-			sb.append("\textra: " + confDesc.extra + "\n");
+			sb.append("\textra: " + confDesc.getExtra() + "\n");
 			// get device handle to retrieve string descriptors
 			Usb_Bus bus = rootBus;
 			while (bus != null) {
-				Usb_Device dev = bus.devices;
+				Usb_Device dev = bus.getDevices();
 				while (dev != null) {
-					Usb_Config_Descriptor[] tmpConfDesc = dev.config;
+					Usb_Config_Descriptor[] tmpConfDesc = dev.getConfig();
 					for (int i = 0; i < tmpConfDesc.length; i++) {
 						if ((tmpConfDesc.equals(confDesc))
-								&& (confDesc.iConfiguration > 0)) {
+								&& (confDesc.getIConfiguration() > 0)) {
 							int handle = LibusbJava.usb_open(dev);
 							sb.append("\nString descriptors\n");
 							if (handle <= 0) {
@@ -304,7 +304,7 @@ public class UsbTreeModel implements TreeModel, TreeSelectionListener {
 							}
 							String configuration = LibusbJava
 									.usb_get_string_simple(handle,
-											confDesc.iConfiguration);
+											confDesc.getIConfiguration());
 							if (configuration == null)
 								configuration = "unable to fetch configuration string";
 							sb.append("\tiConfiguration: " + configuration
@@ -314,58 +314,58 @@ public class UsbTreeModel implements TreeModel, TreeSelectionListener {

 						}
 					}
-					dev = dev.next;
+					dev = dev.getNext();
 				}
-				bus = bus.next;
+				bus = bus.getNext();
 			}
 			textArea.setText(sb.toString());
 		} else if (component instanceof Usb_Interface) {
 			Usb_Interface int_ = (Usb_Interface) component;
 			StringBuffer sb = new StringBuffer("Usb_Interface\n");
 			sb.append("\tnum_altsetting: 0x"
-					+ Integer.toHexString(int_.num_altsetting) + "\n");
-			sb.append("\taltsetting: " + int_.altsetting + "\n");
+					+ Integer.toHexString(int_.getNumAltsetting()) + "\n");
+			sb.append("\taltsetting: " + int_.getAltsetting() + "\n");
 			textArea.setText(sb.toString());
 		} else if (component instanceof Usb_Interface_Descriptor) {
 			Usb_Interface_Descriptor intDesc = (Usb_Interface_Descriptor) component;
 			StringBuffer sb = new StringBuffer("Usb_Interface_Descriptor\n");
-			sb.append("\tblenght: 0x" + Integer.toHexString(intDesc.bLength)
+			sb.append("\tblenght: 0x" + Integer.toHexString(intDesc.getBLength())
 					+ "\n");
 			sb.append("\tbDescriptorType: 0x"
-					+ Integer.toHexString(intDesc.bDescriptorType) + "\n");
+					+ Integer.toHexString(intDesc.getBDescriptorType()) + "\n");
 			sb.append("\tbInterfaceNumber: 0x"
-					+ Integer.toHexString(intDesc.bInterfaceNumber) + "\n");
+					+ Integer.toHexString(intDesc.getBInterfaceNumber()) + "\n");
 			sb.append("\tbAlternateSetting: 0x"
-					+ Integer.toHexString(intDesc.bAlternateSetting) + "\n");
+					+ Integer.toHexString(intDesc.getBAlternateSetting()) + "\n");
 			sb.append("\tbNumEndpoints: 0x"
-					+ Integer.toHexString(intDesc.bNumEndpoints) + "\n");
+					+ Integer.toHexString(intDesc.getBNumEndpoints()) + "\n");
 			sb.append("\tbInterfaceClass: 0x"
-					+ Integer.toHexString(intDesc.bInterfaceClass & 0xFF)
+					+ Integer.toHexString(intDesc.getBInterfaceClass() & 0xFF)
 					+ "\n");
 			sb.append("\tbInterfaceSubClass: 0x"
-					+ Integer.toHexString(intDesc.bInterfaceSubClass & 0xFF)
+					+ Integer.toHexString(intDesc.getBInterfaceSubClass() & 0xFF)
 					+ "\n");
 			sb.append("\tbInterfaceProtocol: 0x"
-					+ Integer.toHexString(intDesc.bInterfaceProtocol & 0xFF)
+					+ Integer.toHexString(intDesc.getBInterfaceProtocol() & 0xFF)
 					+ "\n");
 			sb.append("\tiInterface: 0x"
-					+ Integer.toHexString(intDesc.iInterface) + "\n");
-			sb.append("\textralen: 0x" + Integer.toHexString(intDesc.extralen)
+					+ Integer.toHexString(intDesc.getIInterface()) + "\n");
+			sb.append("\textralen: 0x" + Integer.toHexString(intDesc.getExtralen())
 					+ "\n");
-			sb.append("\textra: " + intDesc.extra + "\n");
+			sb.append("\textra: " + intDesc.getExtra() + "\n");
 			// get device handle to retrieve string descriptors
 			Usb_Bus bus = rootBus;
 			while (bus != null) {
-				Usb_Device dev = bus.devices;
+				Usb_Device dev = bus.getDevices();
 				while (dev != null) {
-					Usb_Config_Descriptor[] confDescs = dev.config;
+					Usb_Config_Descriptor[] confDescs = dev.getConfig();
 					for (int i = 0; i < confDescs.length; i++) {
-						Usb_Interface[] ints = confDescs[i].interface_;
+						Usb_Interface[] ints = confDescs[i].getInterface();
 						for (int j = 0; j < ints.length; j++) {
-							Usb_Interface_Descriptor[] tmpIntDescs = ints[j].altsetting;
+							Usb_Interface_Descriptor[] tmpIntDescs = ints[j].getAltsetting();
 							for (int k = 0; k < ints.length; k++) {
 								if (tmpIntDescs[i].equals(intDesc)
-										&& (intDesc.iInterface > 0)) {
+										&& (intDesc.getIInterface() > 0)) {
 									int handle = LibusbJava.usb_open(dev);
 									sb.append("\nString descriptors\n");
 									if (handle <= 0) {
@@ -375,7 +375,7 @@ public class UsbTreeModel implements TreeModel, TreeSelectionListener {
 									}
 									String interface_ = LibusbJava
 											.usb_get_string_simple(handle,
-													intDesc.iInterface);
+													intDesc.getIInterface());
 									if (interface_ == null)
 										interface_ = "unable to fetch interface string";
 									sb.append("\tiInterface: " + interface_
@@ -385,35 +385,35 @@ public class UsbTreeModel implements TreeModel, TreeSelectionListener {
 							}
 						}
 					}
-					dev = dev.next;
+					dev = dev.getNext();
 				}
-				bus = bus.next;
+				bus = bus.getNext();
 			}
 			textArea.setText(sb.toString());
 		} else if (component instanceof Usb_Endpoint_Descriptor) {
 			Usb_Endpoint_Descriptor epDesc = (Usb_Endpoint_Descriptor) component;
 			StringBuffer sb = new StringBuffer("Usb_Endpoint_Descriptor\n");
-			sb.append("\tblenght: 0x" + Integer.toHexString(epDesc.bLength)
+			sb.append("\tblenght: 0x" + Integer.toHexString(epDesc.getBLength())
 					+ "\n");
 			sb.append("\tbDescriptorType: 0x"
-					+ Integer.toHexString(epDesc.bDescriptorType) + "\n");
+					+ Integer.toHexString(epDesc.getBDescriptorType()) + "\n");
 			sb.append("\tbEndpointAddress: 0x"
-					+ Integer.toHexString(epDesc.bEndpointAddress & 0xFF)
+					+ Integer.toHexString(epDesc.getBEndpointAddress() & 0xFF)
 					+ "\n");
 			sb.append("\tbmAttributes: 0x"
-					+ Integer.toHexString(epDesc.bmAttributes & 0xFF) + "\n");
+					+ Integer.toHexString(epDesc.getBmAttributes() & 0xFF) + "\n");
 			sb.append("\twMaxPacketSize: 0x"
-					+ Integer.toHexString(epDesc.wMaxPacketSize & 0xFFFF)
-					+ " (" + epDesc.wMaxPacketSize + ")\n");
-			sb.append("\tbInterval: 0x" + Integer.toHexString(epDesc.bInterval)
+					+ Integer.toHexString(epDesc.getWMaxPacketSize() & 0xFFFF)
+					+ " (" + epDesc.getWMaxPacketSize() + ")\n");
+			sb.append("\tbInterval: 0x" + Integer.toHexString(epDesc.getBInterval())
 					+ "\n");
-			sb.append("\tbRefresh: 0x" + Integer.toHexString(epDesc.bRefresh)
+			sb.append("\tbRefresh: 0x" + Integer.toHexString(epDesc.getBRefresh())
 					+ "\n");
 			sb.append("\tbSynchAddress: 0x"
-					+ Integer.toHexString(epDesc.bSynchAddress) + "\n");
-			sb.append("\textralen: 0x" + Integer.toHexString(epDesc.extralen)
+					+ Integer.toHexString(epDesc.getBSynchAddress()) + "\n");
+			sb.append("\textralen: 0x" + Integer.toHexString(epDesc.getExtralen())
 					+ "\n");
-			sb.append("\textra: " + epDesc.extra + "\n");
+			sb.append("\textra: " + epDesc.getExtra() + "\n");
 			textArea.setText(sb.toString());
 		}
 	}
--- a/java/test/ch/ntb/usb/test/DeviceTest.java
+++ b/java/test/ch/ntb/usb/test/DeviceTest.java
@@ -72,11 +72,11 @@ public class DeviceTest {
 		dev.updateDescriptors();
 		Usb_Device_Descriptor devDescriptor = dev.getDeviceDescriptor();
 		assertTrue(devDescriptor != null);
-		assertEquals(devinfo.getIdProduct(), devDescriptor.idProduct);
-		assertEquals(devinfo.getIdVendor(), devDescriptor.idVendor);
+		assertEquals(devinfo.getIdProduct(), devDescriptor.getIdProduct());
+		assertEquals(devinfo.getIdVendor(), devDescriptor.getIdVendor());
 		Usb_Config_Descriptor confDescriptors[] = dev.getConfigDescriptors();
 		assertTrue(confDescriptors != null);
-		assertTrue(confDescriptors[0].interface_.length > 0);
+		assertTrue(confDescriptors[0].getInterface().length > 0);
 	}

 	@Test