usbconfiguration.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 72 行

/*
 * $Id: USBConfiguration.java,v 1.2 2003/12/21 07:50:12 epr Exp $
 */
package org.jnode.driver.usb;

/**
 * @author Ewout Prangsma ([e-mail])
 */
public class USBConfiguration extends AbstractDeviceItem {

	/** The descriptor of this configuration */
	private final ConfigurationDescriptor descr;
	/** The interfaces */
	private final USBInterface[] interfaces;

	/**
	 * Initialize this instance.
	 * 
	 * @param descr
	 */
	public USBConfiguration(USBDevice device, ConfigurationDescriptor descr) {
		super(device);
		this.descr = descr;
		this.interfaces = new USBInterface[descr.getNumInterfaces()];
	}

	/**
	 * @return Returns the descr.
	 */
	public final ConfigurationDescriptor getDescriptor() {
		return this.descr;
	}

	/**
	 * Gets a specific interface.
	 */
	public final USBInterface getInterface(int index) {
		return this.interfaces[index];
	}

	/**
	 * @param index The index of the interface
	 * @param intf The interface to set.
	 */
	final void setInterface(int index, USBInterface intf) {
		if (this.interfaces[index] != null) {
			throw new SecurityException("Cannot overwrite a specific interface");
		} else {
			this.interfaces[index] = intf;
		}
	}
	
	/**
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		final StringBuffer b = new StringBuffer();
		b.append("DESCR:");
		b.append(descr);
		b.append(", INTFS{");
		for (int i = 0; i < interfaces.length; i++) {
			if (i > 0) {
				b.append(", ");
			}
			b.append(interfaces[i]);
		} 
		b.append("}");
		return b.toString();
	}

}