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/*
* Copyright 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.util;
import com.google.common.collect.ComparisonChain;
import java.util.Objects;
/**
* Representation of bandwidth.
* Use the static factory method corresponding to the unit (like Kbps) you desire on instantiation.
*/
public final class Bandwidth implements RichComparable<Bandwidth> {
private final double bps;
/**
* Creates a new instance with given bandwidth.
*
* @param bps bandwidth value to be assigned
*/
private Bandwidth(double bps) {
this.bps = bps;
}
// Constructor for serialization
private Bandwidth() {
this.bps = 0;
}
/**
* Creates a new instance with given bandwidth.
*
* @param v bandwidth value
* @param unit {@link DataRateUnit} of {@code v}
* @return {@link Bandwidth} instance with given bandwidth
*/
public static Bandwidth of(double v, DataRateUnit unit) {
return new Bandwidth(unit.toBitsPerSecond(v));
}
/**
* Creates a new instance with given bandwidth in bps.
*
* @param bps bandwidth value to be assigned
* @return {@link Bandwidth} instance with given bandwidth
*/
public static Bandwidth bps(double bps) {
return new Bandwidth(bps);
}
/**
* Creates a new instance with given bandwidth in Kbps.
*
* @param kbps bandwidth value to be assigned
* @return {@link Bandwidth} instance with given bandwidth
*/
public static Bandwidth kbps(double kbps) {
return bps(kbps * 1_000L);
}
/**
* Creates a new instance with given bandwidth in Mbps.
*
* @param mbps bandwidth value to be assigned
* @return {@link Bandwidth} instance with given bandwidth
*/
public static Bandwidth mbps(double mbps) {
return bps(mbps * 1_000_000L);
}
/**
* Creates a new instance with given bandwidth in Gbps.
*
* @param gbps bandwidth value to be assigned
* @return {@link Bandwidth} instance with given bandwidth
*/
public static Bandwidth gbps(double gbps) {
return bps(gbps * 1_000_000_000L);
}
/**
* Returns bandwidth in bps.
*
* @return bandwidth in bps.
*/
public double bps() {
return bps;
}
/**
* Returns a Bandwidth whose value is (this + value).
*
* @param value value to be added to this Frequency
* @return this + value
*/
public Bandwidth add(Bandwidth value) {
return bps(this.bps + value.bps);
}
/**
* Returns a Bandwidth whose value is (this - value).
*
* @param value value to be added to this Frequency
* @return this - value
*/
public Bandwidth subtract(Bandwidth value) {
return bps(this.bps - value.bps);
}
@Override
public int compareTo(Bandwidth other) {
return ComparisonChain.start()
.compare(this.bps, other.bps)
.result();
}
@Override
public boolean equals(Object obj) {
if (obj instanceof Bandwidth) {
Bandwidth that = (Bandwidth) obj;
return Objects.equals(this.bps, that.bps);
}
return false;
}
@Override
public int hashCode() {
return Long.hashCode(Double.doubleToLongBits(bps));
}
@Override
public String toString() {
return String.valueOf(this.bps);
}
}
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