source: src/main/java/genius/core/session/Participant.java

package genius.core.session;

import genius.core.AgentID;
import genius.core.parties.Mediator;
import genius.core.repository.ParticipantRepItem;
import genius.core.repository.ProfileRepItem;

/**
 * Contains full participant info: the party name, strategy and profile.
 * Equality only involves the party NAME, as names should be unique in a
 * negotiation. mediators are also participants. immutable.
 */
public class Participant {
        private AgentID id;
        private ParticipantRepItem strategy;
        private ProfileRepItem profile;

        /**
         * 
         * @param id
         *            the agent ID
         * @param party
         *            the {@link ParticipantRepItem} to use for this participant.
         * @param profile
         *            The profile that this participant uses. can be null if this
         *            participant does not need a profile (eg, {@link Mediator}.
         */
        public Participant(AgentID id, ParticipantRepItem party,
                        ProfileRepItem profile) {
                if (id == null || party == null || profile == null) {
                        throw new IllegalArgumentException("parameter is null");
                }
                this.id = id;
                this.strategy = party;
                this.profile = profile;
        }

        public AgentID getId() {
                return id;
        }

        public ParticipantRepItem getStrategy() {
                return strategy;
        }

        public ProfileRepItem getProfile() {
                return profile;
        }

        @Override
        public int hashCode() {
                final int prime = 31;
                int result = 1;
                result = prime * result + ((id == null) ? 0 : id.hashCode());
                return result;
        }

        /**
         * Equals is based only on the agent id.
         */
        @Override
        public boolean equals(Object obj) {
                if (this == obj)
                        return true;
                if (obj == null)
                        return false;
                if (getClass() != obj.getClass())
                        return false;
                Participant other = (Participant) obj;
                if (id == null) {
                        if (other.id != null)
                                return false;
                } else if (!id.equals(other.id))
                        return false;
                return true;
        }

        @Override
        public String toString() {
                return "Participant[" + id + "," + strategy + "," + profile + "]";
        }

}