[418] | 1 | package testcode;
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| 2 |
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| 3 | import static org.junit.Assert.assertEquals;
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| 4 |
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| 5 | import java.io.IOException;
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| 6 | import java.util.Objects;
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| 7 |
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| 8 | import com.fasterxml.jackson.core.JsonParser;
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| 9 | import com.fasterxml.jackson.core.JsonProcessingException;
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| 10 | import com.fasterxml.jackson.databind.DeserializationContext;
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| 11 | import com.fasterxml.jackson.databind.ObjectMapper;
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| 12 | import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
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| 13 | import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
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| 14 |
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| 15 | @JsonDeserialize(using = ValueDeserializer.class)
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| 16 | public class Value {
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| 17 | private final Object value;
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| 18 |
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| 19 | public Value(Object value) {
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| 20 | this.value = value;
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| 21 | }
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| 22 |
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| 23 | public Object getValue() {
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| 24 | return value;
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| 25 | }
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| 26 |
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| 27 | /** The test code for Value */
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| 28 | public static void main(String[] args) throws JsonProcessingException {
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| 29 | ObjectMapper jackson = new ObjectMapper();
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| 30 | Value val = new Value((float) 12);
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| 31 | System.out.println(jackson.writeValueAsString(val));
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| 32 | assertEquals(val, jackson.readValue("12", Value.class));
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| 33 | val = new Value("hallo");
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| 34 | System.out.println(jackson.writeValueAsString(val));
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| 35 | assertEquals(val, jackson.readValue("\"hallo\"", Value.class));
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| 36 | }
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| 37 |
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| 38 | @Override
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| 39 | public int hashCode() {
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| 40 | return Objects.hash(value);
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| 41 | }
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| 42 |
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| 43 | @Override
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| 44 | public boolean equals(Object obj) {
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| 45 | if (this == obj)
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| 46 | return true;
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| 47 | if (obj == null)
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| 48 | return false;
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| 49 | if (getClass() != obj.getClass())
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| 50 | return false;
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| 51 | Value other = (Value) obj;
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| 52 | return Objects.equals(value, other.value);
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| 53 | }
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| 54 |
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| 55 | @Override
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| 56 | public String toString() {
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| 57 | return "val:" + value;
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| 58 | }
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| 59 | }
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| 60 |
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| 61 | class ValueDeserializer extends StdDeserializer<Value> {
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| 62 | public ValueDeserializer() {
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| 63 | this(null);
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| 64 | }
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| 65 |
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| 66 | public ValueDeserializer(Class<?> vc) {
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| 67 | super(vc);
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| 68 | }
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| 69 |
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| 70 | @Override
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| 71 | public Value deserialize(JsonParser jp, DeserializationContext ctxt)
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| 72 | throws IOException, JsonProcessingException {
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| 73 | String text = jp.getText();
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| 74 | switch (jp.currentToken()) {
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| 75 | case VALUE_NUMBER_FLOAT:
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| 76 | case VALUE_NUMBER_INT:
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| 77 | return new Value(Float.parseFloat(text));
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| 78 | case VALUE_STRING:
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| 79 | return new Value(text);
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| 80 | default:
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| 81 | throw new IOException(
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| 82 | "Expected number of double quoted string but found " + text
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| 83 | + " of type " + jp.currentToken());
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| 84 | }
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| 85 |
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| 86 | }
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| 87 |
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| 88 | }
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