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/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.net;
import org.onlab.packet.MacAddress;
import org.onlab.packet.VlanId;
import java.util.Objects;
import static com.google.common.base.Preconditions.checkArgument;
/**
* Immutable representation of a host identity.
*/
public final class HostId extends ElementId {
/**
* Represents either no host, or an unspecified host; used for creating
* open ingress/egress edge links.
*/
public static final HostId NONE = new HostId(MacAddress.ZERO, VlanId.NONE);
private static final int MAC_LENGTH = 17;
private static final int MIN_ID_LENGTH = 19;
private final MacAddress mac;
private final VlanId vlanId;
// Public construction is prohibited
private HostId(MacAddress mac, VlanId vlanId) {
this.mac = mac;
this.vlanId = vlanId;
}
// Default constructor for serialization
private HostId() {
this.mac = null;
this.vlanId = null;
}
/**
* Returns the host MAC address.
*
* @return MAC address
*/
public MacAddress mac() {
return mac;
}
/**
* Returns the host vlan Id.
*
* @return vlan Id
*/
public VlanId vlanId() {
return vlanId;
}
/**
* Creates a device id using the supplied ID string.
*
* @param string device URI string
* @return host identifier
*/
public static HostId hostId(String string) {
checkArgument(string.length() >= MIN_ID_LENGTH,
"Host ID must be at least %s characters", MIN_ID_LENGTH);
MacAddress mac = MacAddress.valueOf(string.substring(0, MAC_LENGTH));
VlanId vlanId = VlanId.vlanId(Short.parseShort(string.substring(MAC_LENGTH + 1)));
return new HostId(mac, vlanId);
}
/**
* Creates a device id using the supplied MAC & VLAN ID.
*
* @param mac mac address
* @param vlanId vlan identifier
* @return host identifier
*/
public static HostId hostId(MacAddress mac, VlanId vlanId) {
return new HostId(mac, vlanId);
}
/**
* Creates a device id using the supplied MAC and default VLAN.
*
* @param mac mac address
* @return host identifier
*/
public static HostId hostId(MacAddress mac) {
return hostId(mac, VlanId.vlanId(VlanId.UNTAGGED));
}
public String toString() {
return mac + "/" + vlanId;
}
@Override
public int hashCode() {
return Objects.hash(mac, vlanId);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof HostId) {
final HostId other = (HostId) obj;
return Objects.equals(this.mac, other.mac) &&
Objects.equals(this.vlanId, other.vlanId);
}
return false;
}
}
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