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/*
* Copyright 2014 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.onosproject.dhcp;
import com.google.common.base.MoreObjects;
import org.onlab.packet.Ip4Address;
import java.util.Date;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Stores the MAC ID to IP Address mapping details.
*/
public final class IpAssignment {
private final Ip4Address ipAddress;
private final Date timestamp;
private final long leasePeriod;
private final AssignmentStatus assignmentStatus;
public enum AssignmentStatus {
/**
* IP has been requested by a host, but not assigned to it yet.
*/
Option_Requested,
/**
* IP has been assigned to a host.
*/
Option_Assigned,
/**
* IP mapping is no longer active.
*/
Option_Expired
}
/**
* Constructor for IPAssignment, where the ipAddress, the lease period, the timestamp
* and assignment status is supplied.
*
* @param ipAddress
* @param leasePeriod
* @param assignmentStatus
*/
private IpAssignment(Ip4Address ipAddress,
long leasePeriod,
Date timestamp,
AssignmentStatus assignmentStatus) {
this.ipAddress = ipAddress;
this.leasePeriod = leasePeriod;
this.timestamp = timestamp;
this.assignmentStatus = assignmentStatus;
}
/**
* Returns the IP Address of the IP assignment.
*
* @return the IP address
*/
public Ip4Address ipAddress() {
return this.ipAddress;
}
/**
* Returns the timestamp of the IP assignment.
*
* @return the timestamp
*/
public Date timestamp() {
return this.timestamp;
}
/**
* Returns the assignment status of the IP assignment.
*
* @return the assignment status
*/
public AssignmentStatus assignmentStatus() {
return this.assignmentStatus;
}
/**
* Returns the lease period of the IP assignment.
*
* @return the lease period in seconds
*/
public int leasePeriod() {
return (int) this.leasePeriod;
}
/**
* Returns the lease period of the IP assignment.
*
* @return the lease period in milliseconds
*/
public int leasePeriodMs() {
return (int) this.leasePeriod * 1000;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("ip", ipAddress)
.add("timestamp", timestamp)
.add("lease", leasePeriod)
.add("assignmentStatus", assignmentStatus)
.toString();
}
/**
* Creates and returns a new builder instance.
*
* @return new builder
*/
public static Builder builder() {
return new Builder();
}
/**
* Creates and returns a new builder instance that clones an existing IPAssignment.
*
* @param assignment ip address assignment
* @return new builder
*/
public static Builder builder(IpAssignment assignment) {
return new Builder(assignment);
}
/**
* IPAssignment Builder.
*/
public static final class Builder {
private Ip4Address ipAddress;
private Date timeStamp;
private long leasePeriod;
private AssignmentStatus assignmentStatus;
private Builder() {
}
private Builder(IpAssignment ipAssignment) {
ipAddress = ipAssignment.ipAddress();
timeStamp = ipAssignment.timestamp();
leasePeriod = ipAssignment.leasePeriod();
assignmentStatus = ipAssignment.assignmentStatus();
}
public IpAssignment build() {
validateInputs();
return new IpAssignment(ipAddress,
leasePeriod,
timeStamp,
assignmentStatus);
}
public Builder ipAddress(Ip4Address addr) {
ipAddress = addr;
return this;
}
public Builder timestamp(Date timestamp) {
timeStamp = timestamp;
return this;
}
public Builder leasePeriod(int leasePeriodinSeconds) {
leasePeriod = leasePeriodinSeconds;
return this;
}
public Builder assignmentStatus(AssignmentStatus status) {
assignmentStatus = status;
return this;
}
private void validateInputs() {
checkNotNull(ipAddress, "IP Address must be specified");
checkNotNull(assignmentStatus, "Assignment Status must be specified");
checkNotNull(leasePeriod, "Lease Period must be specified");
checkNotNull(timeStamp, "Timestamp must be specified");
switch (assignmentStatus) {
case Option_Requested:
case Option_Assigned:
case Option_Expired:
break;
default:
throw new IllegalStateException("Unknown assignment status");
}
}
}
}
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