[1] | 1 | package agents.anac.y2010.Southampton;
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| 2 |
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| 3 | import java.util.ArrayList;
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| 4 | import java.util.Random;
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| 5 |
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| 6 | import agents.anac.y2010.Southampton.analysis.BidSpace;
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| 7 | import agents.anac.y2010.Southampton.utils.ActionCreator;
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| 8 | import agents.anac.y2010.Southampton.utils.OpponentModel;
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| 9 | import genius.core.Agent;
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| 10 | import genius.core.Bid;
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| 11 | import genius.core.BidIterator;
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| 12 | import genius.core.actions.Accept;
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| 13 | import genius.core.actions.Action;
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| 14 | import genius.core.actions.EndNegotiation;
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| 15 | import genius.core.actions.Offer;
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| 16 | import genius.core.utility.AdditiveUtilitySpace;
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| 17 |
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| 18 | /**
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| 19 | * @author Colin Williams
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| 20 | *
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| 21 | */
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| 22 | public abstract class SouthamptonAgent extends Agent {
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| 23 |
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| 24 | private final boolean TEST_EQUIVALENCE = false;
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| 25 |
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| 26 | private static enum ActionType {
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| 27 | ACCEPT, BREAKOFF, OFFER, START;
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| 28 | }
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| 29 |
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| 30 | // protected static double CONCESSIONFACTOR = 0.04;
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| 31 |
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| 32 | /**
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| 33 | * Our maximum aspiration level.
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| 34 | */
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| 35 | protected static double MAXIMUM_ASPIRATION = 0.9;
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| 36 |
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| 37 | /**
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| 38 | * Gets the version number.
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| 39 | *
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| 40 | * @return the version number.
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| 41 | */
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| 42 | @Override
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| 43 | public String getVersion() {
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| 44 | return "2.0 (Genius 3.1)";
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| 45 | }
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| 46 |
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| 47 | /**
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| 48 | * Our BidSpace.
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| 49 | */
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| 50 | protected BidSpace bidSpace;
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| 51 |
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| 52 | /**
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| 53 | * The message received from the opponent.
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| 54 | */
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| 55 | private Action messageOpponent;
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| 56 |
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| 57 | /**
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| 58 | * My previous action.
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| 59 | */
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| 60 | protected Action myLastAction = null;
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| 61 |
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| 62 | /**
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| 63 | * My previous bid.
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| 64 | */
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| 65 | protected Bid myLastBid = null;
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| 66 |
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| 67 | /**
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| 68 | * A list of our previous bids.
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| 69 | */
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| 70 | protected ArrayList<Bid> myPreviousBids;
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| 71 |
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| 72 | /**
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| 73 | * The bids made by the opponent.
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| 74 | */
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| 75 | protected ArrayList<Bid> opponentBids;
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| 76 |
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| 77 | /**
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| 78 | * Our model of the opponent.
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| 79 | */
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| 80 | protected OpponentModel opponentModel;
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| 81 |
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| 82 | /**
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| 83 | * The opponent's previous bid.
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| 84 | */
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| 85 | protected Bid opponentPreviousBid = null;
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| 86 |
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| 87 | protected final double acceptMultiplier = 1.02;
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| 88 |
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| 89 | protected boolean opponentIsHardHead;
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| 90 |
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| 91 | /*
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| 92 | * (non-Javadoc)
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| 93 | *
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| 94 | * @see java.lang.Object#finalize()
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| 95 | */
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| 96 | @Override
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| 97 | protected void finalize() throws Throwable {
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| 98 | // displayFrame.dispose();
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| 99 | super.finalize();
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| 100 | }
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| 101 |
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| 102 | /**
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| 103 | * Get the action type of a given action.
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| 104 | *
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| 105 | * @param action
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| 106 | * The action.
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| 107 | * @return The action type of the action.
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| 108 | */
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| 109 | private ActionType getActionType(Action action) {
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| 110 | ActionType actionType = ActionType.START;
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| 111 | if (action instanceof Offer)
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| 112 | actionType = ActionType.OFFER;
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| 113 | else if (action instanceof Accept)
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| 114 | actionType = ActionType.ACCEPT;
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| 115 | else if (action instanceof EndNegotiation)
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| 116 | actionType = ActionType.BREAKOFF;
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| 117 | return actionType;
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| 118 | }
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| 119 |
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| 120 | public final Action chooseAction() {
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| 121 |
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| 122 | Action chosenAction = null;
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| 123 | Bid opponentBid = null;
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| 124 |
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| 125 | try {
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| 126 | switch (getActionType(this.messageOpponent)) {
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| 127 | case OFFER:
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| 128 | opponentBid = ((Offer) this.messageOpponent).getBid();
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| 129 | chosenAction = handleOffer(opponentBid);
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| 130 | break;
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| 131 | case ACCEPT:
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| 132 | case BREAKOFF:
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| 133 | break;
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| 134 | default:
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| 135 | if (this.myLastAction == null) {
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| 136 |
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| 137 | chosenAction = new Offer(getAgentID(), proposeInitialBid());
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| 138 |
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| 139 | } else {
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| 140 |
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| 141 | chosenAction = this.myLastAction;
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| 142 | }
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| 143 | break;
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| 144 | }
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| 145 |
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| 146 | } catch (Exception e) {
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| 147 | e.printStackTrace();
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| 148 | chosenAction = ActionCreator.createOffer(this, myLastBid);
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| 149 | }
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| 150 | myLastAction = chosenAction;
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| 151 | if (myLastAction instanceof Offer) {
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| 152 | Bid b = ((Offer) myLastAction).getBid();
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| 153 | myPreviousBids.add(b);
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| 154 | myLastBid = b;
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| 155 | }
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| 156 | return chosenAction;
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| 157 | }
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| 158 |
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| 159 | /**
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| 160 | * Get the number of the agent.
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| 161 | *
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| 162 | * @return the number of the agent.
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| 163 | */
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| 164 | public int getAgentNo() {
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| 165 | if (this.getName() == "Agent A")
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| 166 | return 1;
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| 167 | if (this.getName() == "Agent B")
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| 168 | return 2;
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| 169 | return 0;
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| 170 | }
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| 171 |
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| 172 | /**
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| 173 | * Get all of the bids in a utility range.
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| 174 | *
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| 175 | * @param lowerBound
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| 176 | * The minimum utility level of the bids.
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| 177 | * @param upperBound
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| 178 | * The maximum utility level of the bids.
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| 179 | * @return all of the bids in a utility range.
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| 180 | * @throws Exception
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| 181 | */
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| 182 | private ArrayList<Bid> getBidsInRange(double lowerBound, double upperBound)
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| 183 | throws Exception {
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| 184 | ArrayList<Bid> bidsInRange = new ArrayList<Bid>();
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| 185 | BidIterator iter = new BidIterator(utilitySpace.getDomain());
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| 186 | while (iter.hasNext()) {
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| 187 | Bid tmpBid = iter.next();
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| 188 | double util = 0;
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| 189 | try {
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| 190 | util = utilitySpace.getUtility(tmpBid);
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| 191 | if (util >= lowerBound && util <= upperBound)
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| 192 | bidsInRange.add(tmpBid);
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| 193 | } catch (Exception e) {
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| 194 | e.printStackTrace();
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| 195 | }
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| 196 | }
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| 197 |
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| 198 | return bidsInRange;
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| 199 | }
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| 200 |
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| 201 | /**
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| 202 | * Get the concession factor.
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| 203 | *
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| 204 | * @return the concession factor.
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| 205 | */
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| 206 | /*
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| 207 | * private double getConcessionFactor() { // The more the agent is willing
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| 208 | * to concede on its aspiration value, the // higher this factor. return
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| 209 | * CONCESSIONFACTOR; }
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| 210 | */
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| 211 |
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| 212 | /**
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| 213 | * Get a random bid in a given utility range.
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| 214 | *
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| 215 | * @param lowerBound
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| 216 | * The lower bound on utility.
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| 217 | * @param upperBound
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| 218 | * The upper bound on utility.
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| 219 | * @return a random bid in a given utility range.
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| 220 | * @throws Exception
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| 221 | */
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| 222 | protected Bid getRandomBidInRange(double lowerBound, double upperBound)
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| 223 | throws Exception {
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| 224 | ArrayList<Bid> bidsInRange = getBidsInRange(lowerBound, upperBound);
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| 225 |
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| 226 | int index = (new Random()).nextInt(bidsInRange.size() - 1);
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| 227 |
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| 228 | return bidsInRange.get(index);
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| 229 | }
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| 230 |
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| 231 | /**
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| 232 | * Get the target utility.
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| 233 | *
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| 234 | * @param myUtility
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| 235 | * This agent's utility.
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| 236 | * @param opponentUtility
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| 237 | * The opponent's utility.
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| 238 | * @return the target utility.
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| 239 | */
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| 240 | // protected abstract double getTargetUtility(double myUtility, double
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| 241 | // opponentUtility);
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| 242 | /*
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| 243 | * { return myUtility - getConcessionFactor(); }
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| 244 | */
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| 245 |
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| 246 | /**
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| 247 | * Handle an opponent's offer.
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| 248 | *
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| 249 | * @param opponentBid
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| 250 | * The bid made by the opponent.
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| 251 | * @return the action that we should take in response to the opponent's
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| 252 | * offer.
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| 253 | * @throws Exception
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| 254 | */
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| 255 | @SuppressWarnings("unused")
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| 256 | private Action handleOffer(Bid opponentBid) throws Exception {
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| 257 | Action chosenAction = null;
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| 258 |
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| 259 | if (myLastAction == null) {
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| 260 | // Special case to handle first action
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| 261 |
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| 262 | Bid b = proposeInitialBid();
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| 263 | if (opponentBid != null && TEST_EQUIVALENCE) {
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| 264 | double currentTime = timeline.getTime()
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| 265 | * timeline.getTotalTime() * 1000;
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| 266 | double totalTime = timeline.getTotalTime() * 1000;
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| 267 | opponentModel.updateBeliefs(opponentBid,
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| 268 | Math.round(currentTime), totalTime);
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| 269 | }
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| 270 | myLastBid = b;
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| 271 | chosenAction = new Offer(this.getAgentID(), b);
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| 272 | } else if (utilitySpace.getUtility(opponentBid) * acceptMultiplier >= utilitySpace
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| 273 | .getUtility(myLastBid)) {
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| 274 | // Accept opponent's bid based on my previous bid.
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| 275 | chosenAction = ActionCreator.createAccept(this, opponentBid);
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| 276 | log("Opponent's bid is good enough compared to my last bid, ACCEPTED.");
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| 277 | opponentBids.add(opponentBid);
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| 278 | opponentPreviousBid = opponentBid;
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| 279 | } else if (utilitySpace.getUtility(opponentBid) * acceptMultiplier >= MAXIMUM_ASPIRATION) {
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| 280 | // Accept opponent's bid based on my previous bid.
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| 281 | chosenAction = ActionCreator.createAccept(this, opponentBid);
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| 282 | log("Utility of opponent bid: "
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| 283 | + utilitySpace.getUtility(opponentBid));
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| 284 | log("acceptMultiplier: " + acceptMultiplier);
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| 285 | log("MAXIMUM_ASPIRATION: " + MAXIMUM_ASPIRATION);
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| 286 | log("Opponent's bid is good enough compared to my maximum aspiration, ACCEPTED.");
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| 287 | opponentBids.add(opponentBid);
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| 288 | opponentPreviousBid = opponentBid;
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| 289 | } else {
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| 290 | Bid plannedBid = proposeNextBid(opponentBid);
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| 291 |
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| 292 | chosenAction = ActionCreator.createOffer(this, plannedBid);
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| 293 |
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| 294 | if (plannedBid == null) {
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| 295 | chosenAction = ActionCreator.createAccept(this, opponentBid);
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| 296 | } else {
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| 297 |
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| 298 | if (utilitySpace.getUtility(opponentBid) * acceptMultiplier >= utilitySpace
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| 299 | .getUtility(plannedBid)) {
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| 300 | // Accept opponent's bid based on my planned bid.
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| 301 | chosenAction = ActionCreator
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| 302 | .createAccept(this, opponentBid);
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| 303 | log("Opponent's bid is good enough compared to my planned bid, ACCEPTED");
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| 304 | }
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| 305 | opponentBids.add(opponentBid);
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| 306 | opponentPreviousBid = opponentBid;
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| 307 | }
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| 308 | }
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| 309 | return chosenAction;
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| 310 | }
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| 311 |
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| 312 | /*
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| 313 | * (non-Javadoc)
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| 314 | *
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| 315 | * @see negotiator.Agent#init()
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| 316 | */
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| 317 | public void init() {
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| 318 | messageOpponent = null;
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| 319 | myLastBid = null;
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| 320 | myLastAction = null;
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| 321 | myPreviousBids = new ArrayList<Bid>();
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| 322 | opponentBids = new ArrayList<Bid>();
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| 323 |
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| 324 | try {
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| 325 | bidSpace = new agents.anac.y2010.Southampton.analysis.BidSpace(
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| 326 | (AdditiveUtilitySpace) this.utilitySpace);
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| 327 | } catch (Exception e) {
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| 328 | e.printStackTrace();
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| 329 | }
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| 330 |
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| 331 | opponentIsHardHead = true;
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| 332 | }
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| 333 |
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| 334 | /**
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| 335 | * Output a message, but only if debugging is turned on.
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| 336 | *
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| 337 | * @param message
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| 338 | * The message to output.
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| 339 | */
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| 340 | public final void log(String message) {
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| 341 | // sae.log(this, message);
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| 342 | }
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| 343 |
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| 344 | /**
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| 345 | * Propose the initial bid.
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| 346 | *
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| 347 | * @return The action to be bid.
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| 348 | * @throws Exception
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| 349 | */
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| 350 | protected abstract Bid proposeInitialBid() throws Exception;
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| 351 |
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| 352 | /**
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| 353 | * Propose the next bid.
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| 354 | *
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| 355 | * @param opponentBid
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| 356 | * The bid that has just been made by the opponent.
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| 357 | * @return The action to be bid.
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| 358 | * @throws Exception
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| 359 | */
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| 360 | protected abstract Bid proposeNextBid(Bid opponentBid) throws Exception;
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| 361 |
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| 362 | /*
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| 363 | * (non-Javadoc)
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| 364 | *
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| 365 | * @see negotiator.Agent#ReceiveMessage(negotiator.actions.Action)
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| 366 | */
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| 367 | public final void ReceiveMessage(Action opponentAction) {
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| 368 | // Log the received opponentAction
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| 369 | if (opponentAction == null) {
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| 370 | log("Received (null) from opponent.");
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| 371 | } else {
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| 372 | log("--------------------------------------------------------------------------------");
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| 373 | log("Received " + opponentAction.toString() + " from opponent.");
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| 374 | if (opponentAction instanceof Offer) {
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| 375 | try {
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| 376 | log("It has a utility of "
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| 377 | + utilitySpace.getUtility(((Offer) opponentAction)
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| 378 | .getBid()));
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| 379 |
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| 380 | if (opponentIsHardHead
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| 381 | && opponentBids.size() > 0
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| 382 | && Math.abs(utilitySpace.getUtility(opponentBids
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| 383 | .get(0))
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| 384 | - utilitySpace
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| 385 | .getUtility(((Offer) opponentAction)
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| 386 | .getBid())) > 0.02) {
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| 387 | opponentIsHardHead = false;
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| 388 | }
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| 389 | } catch (Exception e) {
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| 390 | e.printStackTrace();
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| 391 | }
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| 392 | }
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| 393 | }
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| 394 |
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| 395 | // Store the received opponentAction
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| 396 | messageOpponent = opponentAction;
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| 397 | }
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| 398 | }
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