Ip6Prefix.java
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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.onlab.packet;
import java.util.Objects;
/**
* The class representing an IPv6 network address.
* This class is immutable.
*/
public final class Ip6Prefix {
private final Ip6Address address; // The IPv6 address
private final short prefixLen; // The prefix length
/**
* Default constructor.
*/
public Ip6Prefix() {
this.address = new Ip6Address();
this.prefixLen = 0;
}
/**
* Copy constructor.
*
* @param other the object to copy from
*/
public Ip6Prefix(Ip6Prefix other) {
this.address = new Ip6Address(other.address);
this.prefixLen = other.prefixLen;
}
/**
* Constructor for a given address and prefix length.
*
* @param address the address to use
* @param prefixLen the prefix length to use
*/
public Ip6Prefix(Ip6Address address, short prefixLen) {
this.address = Ip6Address.makeMaskedAddress(address, prefixLen);
this.prefixLen = prefixLen;
}
/**
* Constructs an IPv6 prefix from a string representation of the
* prefix.
*<p>
* Example: "1111:2222::/32"
*
* @param value the value to use
*/
public Ip6Prefix(String value) {
String[] splits = value.split("/");
if (splits.length != 2) {
throw new IllegalArgumentException("Specified IPv6 prefix must contain an IPv6 " +
"address and a prefix length separated by '/'");
}
this.prefixLen = Short.decode(splits[1]);
this.address = Ip6Address.makeMaskedAddress(new Ip6Address(splits[0]),
this.prefixLen);
}
/**
* Gets the address value of the IPv6 prefix.
*
* @return the address value of the IPv6 prefix
*/
public Ip6Address getAddress() {
return address;
}
/**
* Gets the prefix length value of the IPv6 prefix.
*
* @return the prefix length value of the IPv6 prefix
*/
public short getPrefixLen() {
return prefixLen;
}
/**
* Converts the IPv6 prefix value to an "address/prefixLen" string.
*
* @return the IPv6 prefix value as an "address/prefixLen" string
*/
@Override
public String toString() {
return this.address.toString() + "/" + this.prefixLen;
}
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
}
if (!(other instanceof Ip6Prefix)) {
return false;
}
Ip6Prefix otherIp6Prefix = (Ip6Prefix) other;
return Objects.equals(this.address, otherIp6Prefix.address)
&& this.prefixLen == otherIp6Prefix.prefixLen;
}
@Override
public int hashCode() {
return Objects.hash(address, prefixLen);
}
}