device.java

来自「监控大型网络的软件。能够自动发现拓扑结构」· Java 代码 · 共 62 行

package no.ntnu.nav.eventengine;

import java.util.*;
import java.sql.*;

/**
 * The Device class forms the root of the class hierarchy for
 * representing devices. Device plugins can inherit this class to
 * provide classes which describes devices in more detail.
 */

public abstract class Device
{
	protected DeviceDB devDB;

	protected int deviceid;

	protected Device() { }

	public Device(DeviceDB devDB, ResultSet rs, Device d) throws SQLException
	{
		this.devDB = devDB;
		deviceid = rs.getInt("deviceid");
	}

	public int getDeviceid() { return deviceid; }
	public Integer getDeviceidI() { return new Integer(deviceid); }

	public static void updateFromDB(DeviceDB ddb) throws SQLException { }
	public void init(DeviceDB ddb) { }

	public abstract void down();
	public abstract void up();
	public abstract boolean isUp();

	/**
	 * Return the class hierarchy for the class of this object as a String.
	 */
	public String getClassH() {
		return getClassH(getClass());
	}

	/**
   * Return the class hierarchy for the class as a String.
   */
	public static String getClassH(Class c) {
		if (c.getSuperclass() == null) return "";
		return getClassH(c.getSuperclass()) + " <- " + c.getName();
	}

	/**
	 * Return true of the names of the classes of the two objects are
	 * equal.
	 */
	public static boolean classEq(Object o1, Object o2)
	{
		if (o1 == null || o2 == null) return false;
		return o1.getClass().getName().equals(o2.getClass().getName());
	}

}