| 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; |
| |
| public static final VlanId NONE = VlanId.vlanId(UNTAGGED); |
| |
| // 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 > 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() { |
| return String.valueOf(this.value); |
| } |
| } |
| |