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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.net;

import org.onosproject.net.provider.ProviderId;
import org.onlab.packet.IpAddress;
import org.onlab.packet.MacAddress;
import org.onlab.packet.VlanId;

import java.util.Collections;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;

import static com.google.common.base.MoreObjects.toStringHelper;

/**
 * A basic implementation of a Host.
 */
public class DefaultHost extends AbstractElement implements Host {

    private final MacAddress mac;
    private final VlanId vlan;
    private final HostLocation location;
    private final Set ips;

    /**
     * Creates an end-station host using the supplied information.
     *
     * @param providerId provider identity
     * @param id         host identifier
     * @param mac        host MAC address
     * @param vlan       host VLAN identifier
     * @param location   host location
     * @param ips        host IP addresses
     * @param annotations optional key/value annotations
     */
    public DefaultHost(ProviderId providerId, HostId id, MacAddress mac,
                       VlanId vlan, HostLocation location, Set ips,
                       Annotations... annotations) {
        super(providerId, id, annotations);
        this.mac = mac;
        this.vlan = vlan;
        this.location = location;
        this.ips = new HashSet<>(ips);
    }

    @Override
    public HostId id() {
        return (HostId) id;
    }

    @Override
    public MacAddress mac() {
        return mac;
    }

    @Override
    public Set ipAddresses() {
        return Collections.unmodifiableSet(ips);
    }

    @Override
    public HostLocation location() {
        return location;
    }

    @Override
    public VlanId vlan() {
        return vlan;
    }

    @Override
    public int hashCode() {
        return Objects.hash(id, mac, vlan, location);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof DefaultHost) {
            final DefaultHost other = (DefaultHost) obj;
            return Objects.equals(this.id, other.id) &&
                    Objects.equals(this.mac, other.mac) &&
                    Objects.equals(this.vlan, other.vlan) &&
                    Objects.equals(this.location, other.location) &&
                    Objects.equals(this.ipAddresses(), other.ipAddresses()) &&
                    Objects.equals(this.annotations(), other.annotations());
        }
        return false;
    }

    @Override
    public String toString() {
        return toStringHelper(this)
                .add("id", id())
                .add("mac", mac())
                .add("vlan", vlan())
                .add("location", location())
                .add("ipAddresses", ipAddresses())
                .add("annotations", annotations())
                .toString();
    }

}