Conversion to java Object fails when using jsonObject.toJavaObject() due to DateTimeParseException

[hshar89]

Class code -

public class Demo {
    public static void main(String[] args) {
        final OffsetDateTime defaultDateTime = OffsetDateTime.MIN;
        DemoMetadata demoMetadata = DemoMetadata.builder()
                .metadataType("TestType")
                .lastMetadataRefreshTime(defaultDateTime)
                .build();
        Map<String, DemoMetadata> map = new HashMap<>();
        map.put(demoMetadata.getMetadataType(), demoMetadata);
        DemoRoot demoRoot = DemoRoot.builder()
                .rootName("Root")
                .lastMetadataRefreshTime(defaultDateTime)
                .dmoToDaoTypeMapping(map)
                .build();
        JSONObject jsonObject = (JSONObject) JSON.toJSON(demoRoot);
        System.out.println(jsonObject);
        DemoRoot updatedRoot = jsonObject.toJavaObject(DemoRoot.class);
        System.out.println(updatedRoot);
    }
    }
    
    @Data
@SuperBuilder
@EqualsAndHashCode(callSuper = true)
@NoArgsConstructor
@AllArgsConstructor
@ToString
public class DemoRoot extends DemoAbstract{

    private static final long serialVersionUID = 1L;
    private String rootName;
    private Map<String, DemoMetadata> dmoToDaoTypeMapping;
    @Override
    public void someFunction() {

    }
}

@Data
@SuperBuilder
@Generated
@EqualsAndHashCode(callSuper = true)
@NoArgsConstructor
@ToString
public class DemoMetadata extends DemoAbstract{

    private static final long serialVersionUID = 1L;

    private String metadataType;

    @Override
    public void someFunction() {

    }
}

@SuperBuilder
@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString
public abstract class DemoAbstract implements Serializable {
    private static final long serialVersionUID = 1L;

    @EqualsAndHashCode.Exclude private OffsetDateTime lastMetadataRefreshTime;

    public abstract void someFunction();
}

Exception -
Exception in thread "main" java.time.format.DateTimeParseException: Text '-999999999-01-01T00:00:00' could not be parsed at index 25
at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2046)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1948)
at java.base/java.time.ZonedDateTime.parse(ZonedDateTime.java:598)
at java.base/java.time.ZonedDateTime.parse(ZonedDateTime.java:583)
at com.alibaba.fastjson2.JSONReader.readZonedDateTime(JSONReader.java:1187)
at com.alibaba.fastjson2.JSONReaderUTF8.readOffsetDateTime(JSONReaderUTF8.java:5429)
at com.alibaba.fastjson2.reader.ORG_2_2_DemoMetadata.readObject(Unknown Source)
at com.alibaba.fastjson2.reader.ObjectReaderImplMapTyped.readObject(ObjectReaderImplMapTyped.java:373)
at com.alibaba.fastjson2.reader.FieldReader.acceptAny(FieldReader.java:437)
at com.alibaba.fastjson2.reader.ObjectReaderAdapter.createInstance(ObjectReaderAdapter.java:615)
at com.alibaba.fastjson2.JSONObject.to(JSONObject.java:1248)
at com.alibaba.fastjson2.JSONObject.toJavaObject(JSONObject.java:1258)
at daytodaycode.Demo.main(Demo.java:34)

##FastJson2 dependency

com.alibaba.fastjson2
fastjson2
2.0.34

Why does this happen?
DemoRoot updatedRoot = jsonObject.toJavaObject(DemoRoot.class);

The toJavaObject converts the private Map<String, DemoMetadata> dmoToDaoTypeMapping, to jsonString first and then converts it back to the exact class. This happens in the FieldReader class.
While doing JSON.toJsonString(), calls goes to JSONWriterUTF16.writeOffsetDateTime().

 if (utc) {
            chars[off++] = 'Z';
        } else {
            zoneId.getChars(0, zoneIdLength, chars, off);
        }

In the else block the off variable is not incremented. It should have been like this,

 if (utc) {
            chars[off++] = 'Z';
        } else {
            zoneId.getChars(0, zoneIdLength, chars, off);
            off = off+zoneIdLength
        }

This has been my analysis so far. In my local after doing the above change, the initial code works.

[wenshao]

https://github.com/alibaba/fastjson2/releases/tag/2.0.35
问题已修复，请用新版本