/*******************************************************************************
* This file is part of OpenNMS(R).
*
* Copyright (C) 2009-2011 The OpenNMS Group, Inc.
* OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
*
* OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
*
* OpenNMS(R) is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* OpenNMS(R) is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenNMS(R). If not, see:
* http://www.gnu.org/licenses/
*
* For more information contact:
* OpenNMS(R) Licensing <license@opennms.org>
* http://www.opennms.org/
* http://www.opennms.com/
*******************************************************************************/
package org.opennms.netmgt.poller;
/**
* <P>
* The NetworkInterface class is designed to be a well defined front for passing
* interfaces to a service monitor. There are many different types of network in
* use today including IPv4, IPv6, IPX, and others. To accomidate the possible
* differences this class provides the basic information that a monitor can use
* to determine the type of interface and its expected address type.
* </P>
*
* <P>
* In addition to providing typing and address information, the interface allows
* for the monitor to associate key-value pairs with an interface. This can be
* used to save state information between the various invocations if necessary.
* The attributes may be shared with other monitors concurrently, so a monitor
* must be careful to choose unique keys to prevent namespace collisions.
* </P>
*
* @author <A HREF="mailto:weave@oculan.com">Weave </A>
* @author <A HREF="http://www.opennms.org/">OpenNMS </A>
*/
public interface NetworkInterface<T> {
/**
* Defines an unknown interface that has no associated address information.
*/
public static final int TYPE_UNKNOWN = 0;
/**
* <P>
* Defines a standard IPv4 or IPv6 address. This is usually modeled by an
* InetAddress object.
* </P>
*/
public static final int TYPE_INET = 1; // InetAddress object returned
/**
* <P>
* Returns the interface type for the network interface.
* </P>
*
* @return a int.
*/
public int getType();
/**
* <P>
* Returns the address information for the interface. If the interface then
* this should be either an InetAddress or an object for specialized address
* types.
* </p>
*
* @return a {@link java.lang.Object} object.
*/
public T getAddress();
/**
* <P>
* This method is used to return the object that is associated with the
* property name. This is very similar to the java.util.Map get() method,
* but requires that the lookup be performed using a String name. The object
* may be of any instance that the monitor previous stored.
* </P>
*
* <P>
* If there is no matching object for the property key, then a null pointer
* is returned to the application.
* </P>
*
* @param property
* The key for the lookup.
* @return The resulting value for the key, null if no value exist.
* @exception java.lang.IllegalArgumentException
* Thrown if the passed key is empty or null.
* @see java.util.Map#get(java.lang.Object)
*/
public <V> V getAttribute(String property);
/**
* <P>
* This method is used to associate an object value with a textual key. If a
* previous value was associated with the key then the old value is returned
* to the caller. This is identical to the behavior defined by the
* java.util.Map put() method. The only restriction is that the key must be
* a java string instance.
* </P>
*
* @param property
* The key
* @param value
* The value to associate with the key
* @return The object that was previously associated with the key. Null is
* returned if there was no previous value associated.
* @exception java.lang.IllegalArgumentException
* Thrown if the property name is empty or null.
* @see java.util.Map#put(java.lang.Object, java.lang.Object)
*/
public Object setAttribute(String property, Object value);
}