| package org.onlab.packet; |
| |
| /** |
| * Representation of a VLAN ID. |
| */ |
| public class VLANID { |
| |
| private final short value; |
| private static final short NONE = 0; |
| // A VLAN ID is actually 12 bits of a VLAN tag. |
| private static final short MAX_VLAN = 4095; |
| |
| protected VLANID(short value) { |
| this.value = value; |
| } |
| |
| public static VLANID vlanId() { |
| return new VLANID(NONE); |
| } |
| |
| public static VLANID vlanId(short 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() { |
| return String.valueOf(this.value); |
| } |
| } |
| |