org.onlab.packet.MplsLabel Maven / Gradle / Ivy
/*
* Copyright 2014-present Open Networking Foundation
*
* 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 {
// 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);
}
}