source: events/src/main/java/geniusweb/actions/Vote.java@ 37

package geniusweb.actions;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;

import geniusweb.issuevalue.Bid;

/**
 * A vote is an indication by a party that it conditionally accepts a bid. It's
 * then up to the protocol to determine the outcome.
 */
public class Vote extends ActionWithBid {
        private final Integer minPower;
        private final Integer maxPower;

        /**
         * @param actor    the {@link PartyId} that does the action
         * @param bid      the bid that is voted on
         * @param minPower the minimum power this bid must get in order for the vote
         *                 to be valid. Power is the sum of the powers of the
         *                 parties that are in the deal. If power=1 for all
         *                 participants (usually the default) power can be
         *                 interpreted as number of votes
         * @param maxPower the maximum power this bid must get in order for the vote
         *                 to be valid. See {@link #minPower}
         */
        @JsonCreator
        public Vote(@JsonProperty("actor") PartyId actor,
                        @JsonProperty("bid") Bid bid,
                        @JsonProperty("minPower") Integer minPower,
                        @JsonProperty("maxPower") Integer maxPower) {
                super(actor, bid);
                this.minPower = minPower;
                this.maxPower = maxPower;
                if (bid == null || minPower == null || minPower < 1 || maxPower == null
                                || maxPower < minPower) {
                        throw new IllegalArgumentException(
                                        "Vote must have non-null bid and minVotes, and minPower must be >=1 and maxPower must be >=minPower");
                }
        }

        /**
         * 
         * @return the minimum power this bid must get in order for the vote to be
         *         valid.
         */
        public Integer getMinPower() {
                return minPower;
        }

        /**
         * 
         * @return the max power this bid must get in order for the vote to be
         *         valid.
         */

        public Integer getMaxPower() {
                return maxPower;
        }

        @Override
        public String toString() {
                return "Vote[" + getActor() + "," + getBid() + "," + minPower + ","
                                + maxPower + "]";
        }

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

        @Override
        public boolean equals(Object obj) {
                if (this == obj)
                        return true;
                if (!super.equals(obj))
                        return false;
                if (getClass() != obj.getClass())
                        return false;
                Vote other = (Vote) obj;
                if (maxPower == null) {
                        if (other.maxPower != null)
                                return false;
                } else if (!maxPower.equals(other.maxPower))
                        return false;
                if (minPower == null) {
                        if (other.minPower != null)
                                return false;
                } else if (!minPower.equals(other.minPower))
                        return false;
                return true;
        }

}