fix convert of Boolean #846

[btkobayashirun]

Please review #846.

[coveralls]

Coverage increased (+0.002%) to 98.998% when pulling 74640e0 on issues/846_change_fquery_specification into 62d27be on development/5.6.0.

[yoshikawaa]

@btkobayashirun Please consider.

[yoshikawaa]

I think you should be as follows.
Because map.put(resetKey, ""); and formattingBoolean#map.put(name, ""); has the same role.
It Makes easier to understand with WebDataBinder#getEmptyValue.

String key = StringUtils.isEmpty(prefix) ? name : prefix + "." + name;
if (value == null) {
  String resetKey =   determineResetKey(key, sourceType);
  map.put(resetKey, "");
  return true;
}
// omit

// Determine whether to convert null value to field marker.
private String determineResetKey(String key, TypeDescriptor sourceType) {
  // Should not convert Boolean null value to field marker.
  // WebDataBinder bind boolean & Boolean field marker as same false value.
  if (Boolean.class == sourceType.getType()) {
    return key;
  }
  return "_" + key;
}

How do you think?

[btkobayashirun]

I agree with you.

Only null check for sourceType is added to the implementation.
5556457

[btyanagawamg]

@takahashihrzg

Please merge .