interfacedescriptor.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 112 行

/*
 * $Id: InterfaceDescriptor.java,v 1.1 2003/11/25 11:41:20 epr Exp $
 */
package org.jnode.driver.usb;


/**
 * @author Ewout Prangsma ([e-mail])
 */
public final class InterfaceDescriptor extends AbstractDescriptor {

	private String intfName;
	
	/**
	 * Initialize a new instance
	 */
	public InterfaceDescriptor() {
		super(USB_DT_INTERFACE_SIZE);
	}
	
	/**
	 * @param data
	 * @param ofs
	 * @param len
	 */
	public InterfaceDescriptor(byte[] data, int ofs, int len) {
		super(data, ofs, len);
	}

	/**
	 * Gets the number of this interface.
	 */
	public final int getInterfaceNumber() {
		return getByte(2);
	}
	
	/**
	 * Gets the alternate setting for the interface number.
	 */
	public final int getAlternateSetting() {
		return getByte(3);
	}
	
	/**
	 * Gets the number of endpoints
	 */
	public final int getNumEndPoints() {
		return getByte(4);
	}
	
	/**
	 * Gets the class of this interface.
	 */
	public final int getInterfaceClass() {
		return getByte(5);
	}
	
	/**
	 * Gets the subclass of this interface.
	 */
	public final int getInterfaceSubClass() {
		return getByte(6);
	}
	
	/**
	 * Gets the protocol of this interface.
	 */
	public final int getInterfaceProtocol() {
		return getByte(7);
	}
	
	/**
	 * Gets the index of string descriptor describing this interface.
	 */
	public final int getInterfaceStringIndex() {
		return getByte(8);
	}
	
	/**
	 * Gets the name of this interface in the default language.
	 */
	public final String getInterfaceName() {
		return intfName;
	}
	
	/**
	 * Load all strings with the default Language ID.
	 * @param dev
	 */
	final void loadStrings(USBDevice dev) 
	throws USBException {
		final int iIdx = getInterfaceStringIndex();
		if (iIdx > 0) {
			intfName = dev.getString(iIdx, 0);
		} 
	}

	/**
	 * Convert to a String representation 
	 * @see java.lang.Object#toString()
	 */
	public final String toString() {
		return "INTF[ifnum:" + getInterfaceNumber() +
			", altst:" + getAlternateSetting() + 
			", #ep:" + getNumEndPoints() +
			", iclass:" + getInterfaceClass() +
			", isubcls:" + getInterfaceSubClass() +
			", iprot:" + getInterfaceProtocol() +
			", name:" + ((intfName != null) ? intfName : ("%" + getInterfaceStringIndex())) + "]";
	}
}