| /* |
| * Copyright 2014-present 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; |
| |
| import org.onlab.util.Identifier; |
| |
| /** |
| * Representation of a MPLS label. |
| */ |
| public final class MplsLabel extends Identifier<Integer> { |
| |
| // An MPLS Label maximum 20 bits. |
| public static final int MAX_MPLS = 0xFFFFF; |
| |
| protected MplsLabel(int value) { |
| super(value); |
| } |
| |
| public static MplsLabel mplsLabel(int value) { |
| |
| if (value < 0 || value > MAX_MPLS) { |
| String errorMsg = "MPLS label value " + value + |
| " is not in the interval [0, 0xFFFFF]"; |
| throw new IllegalArgumentException(errorMsg); |
| } |
| return new MplsLabel(value); |
| } |
| |
| /** |
| * Creates a MplsLabel object using the supplied decimal string. |
| * |
| * @param value the MPLS identifier expressed as string |
| * @return Mplslabel object created from the string |
| */ |
| public static MplsLabel mplsLabel(String value) { |
| try { |
| return MplsLabel.mplsLabel(Integer.parseInt(value)); |
| } catch (NumberFormatException e) { |
| throw new IllegalArgumentException(e); |
| } |
| } |
| |
| public int toInt() { |
| return this.id(); |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(this.identifier); |
| } |
| |
| } |