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/*
* Copyright 2014-2015 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.onlab.packet;
/**
* Representation of a VLAN ID.
*/
public class VlanId {
private final short value;
// Based on convention used elsewhere? Check and change if needed
public static final short UNTAGGED = (short) 0xffff;
// In a traffic selector, this means that a VLAN ID must be present, but
// can have any value. We use the same value as OpenFlow, but this is not
// required.
public static final short ANY_VALUE = (short) 0x1000;
public static final VlanId NONE = VlanId.vlanId(UNTAGGED);
public static final VlanId ANY = VlanId.vlanId(ANY_VALUE);
// A VLAN ID is actually 12 bits of a VLAN tag.
public static final short MAX_VLAN = 4095;
protected VlanId() {
this.value = UNTAGGED;
}
protected VlanId(short value) {
this.value = value;
}
public static VlanId vlanId() {
return new VlanId(UNTAGGED);
}
public static VlanId vlanId(short value) {
if (value == UNTAGGED) {
return new VlanId();
}
if (value == ANY_VALUE) {
return new VlanId(ANY_VALUE);
}
if (value > MAX_VLAN) {
throw new IllegalArgumentException(
"value exceeds allowed maximum VLAN ID value (4095)");
}
return new VlanId(value);
}
public short toShort() {
return this.value;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof VlanId) {
VlanId other = (VlanId) obj;
if (this.value == other.value) {
return true;
}
}
return false;
}
@Override
public int hashCode() {
return this.value;
}
@Override
public String toString() {
if (this.value == ANY_VALUE) {
return "Any";
}
return String.valueOf(this.value);
}
}
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