- mcdp renamed to java

git-svn-id: https://svn.code.sf.net/p/libusbjava/code/trunk@144 94ad28fe-ef68-46b1-9651-e7ae4fcf1c4c

java/src/ch/ntb/usb/USB.java

@@ -0,0 +1,76 @@
+package ch.ntb.usb;
+
+import java.util.Iterator;
+import java.util.LinkedList;
+
+import ch.ntb.usb.logger.LogUtil;
+import ch.ntb.usb.logger.UsbLogger;
+
+/**
+ * This class manages all USB devices and defines some USB specific constants.
+ * 
+ * @author schlaepfer
+ * 
+ */
+public class USB {
+
+	/**
+	 * The maximum packet size of a bulk transfer when operation in highspeed
+	 * (480 MB/s) mode.
+	 */
+	public static int HIGHSPEED_MAX_BULK_PACKET_SIZE = 512;
+
+	/**
+	 * The maximum packet size of a bulk transfer when operation in fullspeed
+	 * (12 MB/s) mode.
+	 */
+	public static int FULLSPEED_MAX_BULK_PACKET_SIZE = 64;
+
+	private static UsbLogger logger = LogUtil.ch_ntb_usb;
+
+	private static LinkedList<Device> devices = new LinkedList<Device>();
+
+	/**
+	 * Create a new device an register it in a device queue or get an already
+	 * created device.<br>
+	 * 
+	 * @param idVendor
+	 *            the vendor id of the USB device
+	 * @param idProduct
+	 *            the product id of the USB device
+	 * @return a newly created device or an already registered device
+	 */
+	public static Device getDevice(short idVendor, short idProduct) {
+
+		// check if this device is already registered
+		Device dev = getRegisteredDevice(idVendor, idProduct);
+		if (dev != null) {
+			logger.info("return already registered device");
+			return dev;
+		}
+		dev = new Device(idVendor, idProduct);
+		logger.info("create new device");
+		devices.add(dev);
+		return dev;
+	}
+
+	/**
+	 * Get an already registered device or null if the device does not exist.<br>
+	 * 
+	 * @param idVendor
+	 *            the vendor id of the USB device
+	 * @param idProduct
+	 *            the product id of the USB device
+	 * @return the device or null
+	 */
+	private static Device getRegisteredDevice(short idVendor, short idProduct) {
+		for (Iterator<Device> iter = devices.iterator(); iter.hasNext();) {
+			Device dev = iter.next();
+			if ((dev.getIdVendor() == idVendor)
+					&& (dev.getIdProduct() == idProduct)) {
+				return dev;
+			}
+		}
+		return null;
+	}
+}