[316] | 1 | package bargainingchips.utilityfunctions;
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[315] | 2 |
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[316] | 3 | import bargainingchips.Bundle;
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| 4 | import bargainingchips.BundleBuilder;
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| 5 | import bargainingchips.Chip;
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| 6 | import bargainingchips.WishList;
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| 7 | import bargainingchips.WishListBuilder;
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[315] | 8 |
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| 9 | /**
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| 10 | * Utility function for testing that acts on queantity alone.
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| 11 | * Returns 1 when the wish list is exactly satisfied. Becomes lower with higher quantity deviations.
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| 12 | */
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| 13 | public class UF_CloseToQuantity implements UtilityFunction
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| 14 | {
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| 15 | private WishList wishlist;
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| 16 |
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| 17 | public UF_CloseToQuantity(WishList w)
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| 18 | {
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| 19 | this.wishlist = w;
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| 20 | }
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| 21 |
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| 22 |
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| 23 | @Override
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| 24 | public Double getUtility(Bundle b)
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| 25 | {
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| 26 | int totalDeviation = 0;
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| 27 | for (Chip c : wishlist)
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| 28 | {
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| 29 | int desired = wishlist.getQuantity(c);
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| 30 | Integer offered = b.getQuantity(c);
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| 31 | if (offered == null)
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| 32 | offered = 0;
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| 33 |
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| 34 | int deviationOffered = Math.abs(desired - offered);
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| 35 | totalDeviation += deviationOffered;
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| 36 | }
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| 37 |
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| 38 | return 1.0 / (1 + totalDeviation);
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| 39 | }
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| 40 |
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| 41 | @Override
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| 42 | public String toString()
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| 43 | {
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| 44 | return this.getClass().getSimpleName() + ": " + wishlist.toString();
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| 45 | }
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| 46 |
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| 47 | public static void main(String[] args)
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| 48 | {
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| 49 | WishList wishlist = new WishListBuilder().addWish("Red", 7).addWish("Green", 5).build();
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| 50 | UF_CloseToQuantity u = new UF_CloseToQuantity(wishlist);
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| 51 | System.out.println(u);
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| 52 |
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| 53 | Bundle offer = new BundleBuilder()
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| 54 | .addStack("Red", 1.0, 6)
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| 55 | .addStack("Green", 3.0, 15)
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| 56 | .addStack("Purple", 0.10, 10)
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| 57 | .build();
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| 58 | System.out.println(u.getUtility(offer));
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| 59 | }
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| 60 |
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| 61 | }
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| 62 |
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