[346] | 1 | package testcode;
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| 2 |
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| 3 | import java.util.Objects;
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| 4 |
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| 5 | import com.fasterxml.jackson.annotation.JsonAutoDetect;
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| 6 | import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
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| 7 | import com.fasterxml.jackson.annotation.JsonCreator;
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| 8 | import com.fasterxml.jackson.annotation.JsonProperty;
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| 9 | import com.fasterxml.jackson.annotation.JsonTypeInfo;
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| 10 | import com.fasterxml.jackson.annotation.JsonTypeInfo.As;
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| 11 | import com.fasterxml.jackson.core.JsonProcessingException;
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| 12 | import com.fasterxml.jackson.databind.ObjectMapper;
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| 13 |
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| 14 | /**
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| 15 | * jackson-serializable Person, also with extra age field and equals and
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| 16 | * hashcode
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| 17 | */
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| 18 | @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = As.WRAPPER_OBJECT)
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| 19 | @JsonAutoDetect(fieldVisibility = Visibility.ANY, getterVisibility = Visibility.NONE, setterVisibility = Visibility.NONE)
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| 20 | public class PersonJson {
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| 21 | private static final ObjectMapper jackson = new ObjectMapper();
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| 22 | private static final String serialized = "{\"PersonJson\":{\"name\":\"Kees\",\"age\":25}}";
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| 23 |
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| 24 | private final String name;
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| 25 | private Integer age;
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| 26 |
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| 27 | @JsonCreator
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| 28 | public PersonJson(@JsonProperty("name") String name,
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| 29 | @JsonProperty("age") Integer age) {
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| 30 | this.name = name;
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| 31 | this.age = age;
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| 32 | }
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| 33 |
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| 34 | @Override
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| 35 | public String toString() {
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| 36 | return "Person[" + name + "," + age + "]";
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| 37 | }
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| 38 |
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| 39 | @Override
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| 40 | public int hashCode() {
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| 41 | return Objects.hash(age, name);
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| 42 | }
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| 43 |
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| 44 | @Override
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| 45 | public boolean equals(Object obj) {
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| 46 | if (this == obj)
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| 47 | return true;
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| 48 | if (obj == null)
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| 49 | return false;
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| 50 | if (getClass() != obj.getClass())
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| 51 | return false;
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| 52 | PersonJson other = (PersonJson) obj;
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| 53 | return Objects.equals(age, other.age)
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| 54 | && Objects.equals(name, other.name);
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| 55 | }
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| 56 |
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| 57 | static public void main(String[] args) throws JsonProcessingException {
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| 58 | PersonJson person = new PersonJson("Kees", 25);
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| 59 | System.out.println(person.toString());
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| 60 | System.out.println(jackson.writeValueAsString(person));
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| 61 | System.out.println(
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| 62 | person.equals(jackson.readValue(serialized, PersonJson.class)));
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| 63 | /*-
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| 64 | Person[Kees,25]
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| 65 | {"PersonJson":{"name":"Kees","age":25}}
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| 66 | true
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| 67 | */
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| 68 | }
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| 69 | }
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