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22
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1 package jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util;
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2
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3 public class DefaultEither<A,B> implements Either<A,B>
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4 {
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5 private final A theA;
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6 private final B theB;
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7
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23
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8 private DefaultEither(A _theA,B _theB)
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22
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9 {
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10 theA = _theA;
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23
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11 theB = _theB;
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12 }
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13
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14 public static final <A,B> DefaultEither<A,B> newA(A _theA)
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15 {
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16 return new DefaultEither<A,B>(_theA,null);
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17 }
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18
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19 public static final <A,B> DefaultEither<A,B> newB(B _theB)
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20 {
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21 return new DefaultEither<A,B>(null,_theB);
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22
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22 }
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23
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24 @Override
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25 public A a()
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26 {
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27 return theA;
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28 }
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29
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30 @Override
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31 public boolean isA()
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32 {
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39
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33 return theA != null;
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22
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34 }
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35
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36 @Override
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37 public B b()
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38 {
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39 return theB;
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40 }
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41
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42 @Override
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43 public boolean isB()
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44 {
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39
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45 return theB != null;
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22
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46 }
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47 }
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