# Property annotations in default ctor of data class are ignored ~ any response to this bug?

**URL:** <https://discuss.kotlinlang.org/t/property-annotations-in-default-ctor-of-data-class-are-ignored-any-response-to-this-bug/7065>\
**Category:** Support\
**Created:** [March 16, 2018, 1:09am UTC](https://discuss.kotlinlang.org/t/property-annotations-in-default-ctor-of-data-class-are-ignored-any-response-to-this-bug/7065 "2018-03-16T01:09:14Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![abelli](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.kotlinlang.org/abelli/32/2994_2.png) [@abelli](https://discuss.kotlinlang.org/u/abelli)\
**Post date:** [March 16, 2018, 1:09am UTC](https://discuss.kotlinlang.org/t/property-annotations-in-default-ctor-of-data-class-are-ignored-any-response-to-this-bug/7065/1 "2018-03-16T01:09:15Z")

</div>

I wanna add annotations to some properties (specially on those of Date type) in a data class. But the annotations for fields in default ctor of data class are ignored after compilation. Here’s some snippets:

1. source of data classes:

2. source for data class DataParam, please note that annotations are added inside the class body out of default ctor:

3. decompiled source with jd after compilation:

public final class PipeParam  
implements Serializable  
{  
@Nullable  
private String firmId;  
@Nullable  
private Date surveyDate;  
@Nullable  
private Date buildDate;

```
  public PipeParam(@Nullable String firmId, @Nullable @JsonSerialize(using=JsonDateSerializer.class) @JsonDeserialize(using=JsonDateDeserializer.class) @JSONField(serializeUsing=DateCodec.class, deserializeUsing=DateCodec.class, format="yyyy-MM-dd'T'HH:mm:ss.SSSX") Date surveyDate, @Nullable @JsonSerialize(using=JsonDateSerializer.class) @JsonDeserialize(using=JsonDateDeserializer.class) @JSONField(serializeUsing=DateCodec.class, deserializeUsing=DateCodec.class, format="yyyy-MM-dd'T'HH:mm:ss.SSSX") Date buildDate)
  {
	this.firmId = firmId;this.surveyDate = surveyDate;this.buildDate = buildDate;
  }
  
  @Nullable
  public final String getFirmId()
  {
	return this.firmId;
  }
  
  public final void setFirmId(@Nullable String <set-?>)
  {
	this.firmId = <set-?>;
  }
  
  @Nullable
  public final Date getSurveyDate()
  {
	return this.surveyDate;
  }
  
  public final void setSurveyDate(@Nullable Date <set-?>)
  {
	this.surveyDate = <set-?>;
  }
  
  @Nullable
  public final Date getBuildDate()
  {
	return this.buildDate;
  }
  
  public final void setBuildDate(@Nullable Date <set-?>)
  {
	this.buildDate = <set-?>;
  }
  
  public PipeParam()
  {
	this(null, null, null, 7, null);
  }
  
  @Nullable
  public final String component1()
  {
	return this.firmId;
  }
  
  @Nullable
  public final Date component2()
  {
	return this.surveyDate;
  }
  
  @Nullable
  public final Date component3()
  {
	return this.buildDate;
  }
  
  @NotNull
  public final PipeParam copy(@Nullable String firmId, @Nullable @JsonSerialize(using=JsonDateSerializer.class) @JsonDeserialize(using=JsonDateDeserializer.class) @JSONField(serializeUsing=DateCodec.class, deserializeUsing=DateCodec.class, format="yyyy-MM-dd'T'HH:mm:ss.SSSX") Date surveyDate, @Nullable @JsonSerialize(using=JsonDateSerializer.class) @JsonDeserialize(using=JsonDateDeserializer.class) @JSONField(serializeUsing=DateCodec.class, deserializeUsing=DateCodec.class, format="yyyy-MM-dd'T'HH:mm:ss.SSSX") Date buildDate)
  {
	return new PipeParam(firmId, surveyDate, buildDate);
  }
  
  public String toString()
  {
	return "PipeParam(firmId=" + this.firmId + ", surveyDate=" + this.surveyDate + ", buildDate=" + this.buildDate + ")";
  }
  
  public boolean equals(Object paramObject)
  {
	if (this != paramObject)
	{
	  if ((paramObject instanceof PipeParam))
	  {
		PipeParam localPipeParam = (PipeParam)paramObject;
		if ((!Intrinsics.areEqual(this.firmId, localPipeParam.firmId)) || (!Intrinsics.areEqual(this.surveyDate, localPipeParam.surveyDate)) || (!Intrinsics.areEqual(this.buildDate, localPipeParam.buildDate))) {}
	  }
	}
	else {
	  return true;
	}
	return false;
  }
}

```

1. and log for json serialization. please note DataParam json defines annotated properties out of default constructor. so annotations on #buildDate in PipeParam does not work, while annotations on #sampleTime1 in data class DataParam work fine.  
pipe json: {“buildDate”:1521161612689,“firmId”:“1”}  
data json: {“calculating”:false,“duration”:“DURATION\_60\_MIN”,“durationInt”:60,“firmId”:“21”,“index”:0,“rows”:2000,“sampleTime1”:“2018-03-16T08:53:32.800+08”}