@JsonFormat.pattern on dates is now ignored if shape is not explicitely provided

[yrodiere]

Since #1111 was merged, JsonFormat.pattern is now only taken into account if the shape is set to STRING. When leaving the default shape (ANY), the pattern is ignored.

Thus this works:

public class Person
{
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-mm-dd")
    public Date dateOfBirth;
}

But this doesn't (anymore):

public class Person
{
    @JsonFormat(pattern = "yyyy-mm-dd") // Uses default shape, which is ANY
    public Date dateOfBirth;
}

From what I understand of DataTimeSerializerBase's code, it seems that the default "shape" for a date-time is a String (see how _asTimestamp returns false by default). So it seems that providing a pattern should work with the shape ANY, which means "the default shape", which is STRING.

The issue stems from this line . It should be something like this instead:

if (format.getShape() == JsonFormat.Shape.STRING || format.getShape() == JsonFormat.Shape.ANY) {

PR coming as soon as I have the issue ID.

[cowtowncoder]

Thank you for reporting this. I think you are probably right with your assessment and this was just an oversight.

[cowtowncoder]

Fixed for 2.7.3.