Cannot construct instance of `java.time.LocalDate` - Spring boot, elasticseach, jackson

Question

I'm using Spring-boot 2.0.0.M7 and spring-boot-starter-data-elasticsearch and elasticsearch 5 and I'm getting an error by deserializing a LocalDate field.

My Document looks like that:

@Document(indexName= "myIndex", type = "cluster")
public class Cluster {

    @Id
    @Field
    private Long id;
    @Field
    private String name;
    @Field
    private ClusterUrl clusterUrl;
    @Field
    private ClusterVisible clusterVisible;
}

Where ClusterVisible is a child object which holds the LocalDates:

public class ClusterVisible {

    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd.MM.yyyy")
    private LocalDate start;
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd.MM.yyyy")
    private LocalDate end;
}

So I just make a query for one cluster Id and I get this exception:

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.time.LocalDate` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
 at [Source: (String)"{"id":12345,"name":"Cluster name ","clusterName":{"de":"Cluster de","it":null,"fr":null},"clusterUrl":{"de":"/url/results","it":null,"fr":null},"clusterVisible":{"start":{"year":2017,"month":"OCTOBER","dayOfMonth":9,"dayOfWeek":"MONDAY","era":"CE","dayOfYear":282,"leapYear":false,"mo"[truncated 252 chars]; line: 1, column: 388] (through reference chain: com.example.elasticsearch5.es.cluster.model.Cluster["clusterVisible"]->com.example.elasticsearch5.es.cluster.model.ClusterVisible["start"])
    at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:67)
    at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1451)
    at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1027)
    at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1290)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:326)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)
    at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:127)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:288)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
    at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:127)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:288)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4001)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2992)
    at org.springframework.data.elasticsearch.core.DefaultEntityMapper.mapToObject(DefaultEntityMapper.java:65)

I already know that I need to add some jackson dependencies for the java.time api so I added:

<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.9.4</version>
</dependency>

But this does not help for now. I also checked the entry in the index by making a query using kibana. The result of the query is:

...
"clusterVisible": {
    "start": {
      "year": 2017,
      "month": "OCTOBER",
      "dayOfMonth": 25,
      "dayOfWeek": "WEDNESDAY",
      "era": "CE",
      "dayOfYear": 298,
      "leapYear": false,
      "monthValue": 10,
      "chronology": {
        "id": "ISO",
        "calendarType": "iso8601"
      }
    },
    "end": {
      "year": 3000,
      "month": "JANUARY",
      "dayOfMonth": 1,
      "dayOfWeek": "WEDNESDAY",
      "era": "CE",
      "dayOfYear": 1,
      "leapYear": false,
      "monthValue": 1,
      "chronology": {
        "id": "ISO",
        "calendarType": "iso8601"
      }
    }
}

What do I miss for fixing this error?

Addition: The exact error occours at mapper.mapToObject. So I created a new DefaultEntityMapper(); some lines before. Could that be the issue?

@Override
public Page<Cluster> findClustersAndScoreByText(String text) {
    QueryBuilder queryBuilder = QueryBuilders.boolQuery()
            .should(QueryBuilders.queryStringQuery(text).lenient(true).defaultOperator(Operator.OR)
                    .field("name")
                    .field("svno"));

    NativeSearchQuery nativeSearchQuery = new NativeSearchQueryBuilder().withQuery(queryBuilder)
            .withPageable(PageRequest.of(0, 100)).build();

    DefaultEntityMapper mapper = new DefaultEntityMapper();
    ResultsExtractor<Page<Cluster>> rs = new ResultsExtractor<Page<Cluster>>() {

        @Override
        public Page<Cluster> extract(SearchResponse response) {
            ArrayList<Cluster> hotels = new ArrayList<>();
            SearchHit[] hits = response.getHits().getHits();
            for (SearchHit hit : hits) {
                try {
                    Cluster cluster = mapper.mapToObject(hit.getSourceAsString(), Cluster.class);
                    cluster.setScore(hit.getScore());
                    hotels.add(cluster);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return new PageImpl<>(hotels, PageRequest.of(0, 100), response.getHits().getTotalHits());
        }
    };

    return elasticsearchTemplate.query(nativeSearchQuery, rs);
}

Solution 1

add below annotation over the field LocalDate

@JsonDeserialize(using = LocalDateDeserializer.class)
@JsonSerialize(using = LocalDateSerializer.class)
private LocalDate start;

Solution 2

Date/time format, according to ISO 8601 is "YYYY-MM-DD", so your pattern should be:

@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")

Instead of:

@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd.MM.yyyy")

Another way is adding in your application.yml

spring:
    jackson:
        serialization:
            WRITE_DATES_AS_TIMESTAMPS: false

Or disable this feature directly in your object mapper:

objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)

Solution 3

need to install JsonFormat JsonDeserialize JsonSerialize

private LocalDate dateOfBirth;

    @PastOrPresent(message = "must be past time or present")
    @Column(name = "date_of_birth", nullable = false, columnDefinition = "DATE")
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy")
    @JsonDeserialize(using = LocalDateDeserializer.class)
    @JsonSerialize(using = LocalDateSerializer.class)
    public LocalDate getDateOfBirth() {
        return dateOfBirth;
    }

    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd-MM-yyyy")
    public void setDateOfBirth(LocalDate dateOfBirth) {
        this.dateOfBirth = dateOfBirth;
    }

Comments

[OneCricketeer]

Your start and end data are objects... Why would pattern = "dd.MM.yyyy" work?

[Patrick]

@cricket_007 should be ok for deserializing to the frontend. But I removed it and there is no change.

[OneCricketeer]

The error is telling you that no default constructor exists for a localdatetime and its an immutable class, so it can't just call setters for each field in the json. Why don't you write your own class for that object?

[Patrick]

@cricket_007 if the config does not work I need to write my own class. I autowired the jackson object mapper instead using a new one, I get another exception for localdate: com.fasterxml.jackson.databind.exc.MismatchedInputException: Unexpected token (START_OBJECT), expected VALUE_STRING: Expected array or string. any idea?

[OneCricketeer]

"start": { is an object, as the error says. JsonFormat.Shape.STRING is trying to parse a string, which you don't have

[user1428716]

this solution would not work if these are auto-generated stubs. Answer by @evdelacruz is more valid

[Dimitri Kopriwa]

How can I disable the serialization for one request and not all of them?

[evdelacruz]

@DimitriKopriwa, the ObjectMapper is a bean that is built within the ApplicationContext to be injected as needed. I'm afraid u will need to use Jackson custom annotations to achieve that. Another possibility is to treat the field as a String within the DTO/VO/TO and then parse it as desired within that specific scenario/request.

[Irinel]

it's not enough