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1 | package geniusweb.issuevalue;
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2 |
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3 | import org.eclipse.jdt.annotation.NonNull;
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4 |
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5 | import com.fasterxml.jackson.annotation.JsonValue;
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6 |
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7 | /**
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8 | * A value for a discrete issue. Constructor guarantees this is non-null and
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9 | * non-empty. immutable.
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10 | */
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11 | public class DiscreteValue implements Value {
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12 |
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13 | // serializes nicely but requires custom deserializer.
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14 | private final @NonNull String value;
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15 |
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16 | public DiscreteValue(final @NonNull String value) {
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17 | if (value == null || value.isEmpty())
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18 | throw new NullPointerException(
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19 | "value must be non-null and non-empty");
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20 | this.value = value;
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21 | }
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22 |
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23 | @Override
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24 | public int hashCode() {
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25 | final int prime = 31;
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26 | int result = 1;
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27 | result = prime * result + ((value == null) ? 0 : value.hashCode());
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28 | return result;
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29 | }
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30 |
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31 | @Override
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32 | public boolean equals(Object obj) {
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33 | if (this == obj)
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34 | return true;
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35 | if (obj == null)
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36 | return false;
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37 | if (getClass() != obj.getClass())
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38 | return false;
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39 | DiscreteValue other = (DiscreteValue) obj;
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40 | if (value == null) {
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41 | if (other.value != null)
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42 | return false;
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43 | } else if (!value.equals(other.value))
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44 | return false;
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45 | return true;
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46 | }
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47 |
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48 | @Override
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49 | public @NonNull String toString() {
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50 | return "\"" + value + "\"";
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51 | }
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52 |
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53 | @Override
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54 | @JsonValue
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55 | public @NonNull String getValue() {
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56 | return value;
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57 | }
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58 | }
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