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package org.onlab.packet;
/*
* Copyright 2014-2015 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.
*/
/**
* Representation of a transport layer port.
*/
public class TpPort {
private final int port;
// Transport layer port is unsigned 16 bits integer.
public static final int MAX_PORT = 0xFFFF;
public static final int MIN_PORT = 0;
/**
* Constructs a new TpPort.
*
* @param value the transport layer port
*/
protected TpPort(int value) {
this.port = value;
}
/**
* Converts an integer into a TpPort.
*
* @param value an integer representing the transport layer port
* @return a TpPort
* @throws IllegalArgumentException if the value is invalid
*/
public static TpPort tpPort(int value) {
if (value < MIN_PORT || value > MAX_PORT) {
throw new IllegalArgumentException(
"Transport layer port value " + value + "is not in the interval [0, 0xFFFF]");
}
return new TpPort(value);
}
/**
* Returns the integer value for this transport port.
*
* @return an integer value
*/
public int toInt() {
return this.port;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof TpPort) {
TpPort other = (TpPort) obj;
if (this.port == other.port) {
return true;
}
}
return false;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return this.port;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return String.valueOf(this.port);
}
}
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