source/core-developers/conversion-error-field-validator-annotation.md

---
layout: default
title: ConversionErrorFieldValidator Annotation
parent:
    title: Annotations
    url: annotations.html
---

# ConversionErrorFieldValidator Annotation

This validator checks if there are any conversion errors for a field and applies them if they exist.
See [Type Conversion Error Handling](type-conversion.html#type-conversion-error-handling) for details.

## Usage

The `ConversionErrorFieldValidator` annotation must be applied at method level.

## Parameters

<p> <table class='confluenceTable' summary=''>
 <tr>
 <th class='confluenceTh'> Parameter </th>
 <th class='confluenceTh'> Required </th>
 <th class='confluenceTh'> Default </th>
 <th class='confluenceTh'> Notes </th>
 </tr>
 <tr>
 <td class='confluenceTd'>message</td>
 <td class='confluenceTd'>yes</td>
 <td class='confluenceTd'>&nbsp;</td>
 <td class='confluenceTd'>field error message</td>
 </tr>
 <tr>
 <td class='confluenceTd'>key</td>
 <td class='confluenceTd'>no</td>
 <td class='confluenceTd'>&nbsp;</td>
 <td class='confluenceTd'>i18n key from language specific properties file.</td>
 </tr>
 <tr>
 <td class='confluenceTd'>messageParams</td>
 <td class='confluenceTd'>no</td>
 <td class='confluenceTd'>&nbsp;</td>
 <td class='confluenceTd'>Additional params to be used to customize message - will be evaluated against the Value Stack</td>
 </tr>
 <tr>
 <td class='confluenceTd'>fieldName</td>
 <td class='confluenceTd'>no</td>
 <td class='confluenceTd'>&nbsp;</td>
 <td class='confluenceTd'>&nbsp;</td>
 </tr>
 <tr>
 <td class='confluenceTd'>shortCircuit</td>
 <td class='confluenceTd'>no</td>
 <td class='confluenceTd'>false</td>
 <td class='confluenceTd'>If this validator should be used as shortCircuit.</td>
 </tr>
 <tr>
 <td class='confluenceTd'>type</td>
 <td class='confluenceTd'>yes</td>
 <td class='confluenceTd'>ValidatorType.FIELD</td>
 <td class='confluenceTd'>Enum value from ValidatorType. Either FIELD or SIMPLE can be used here.</td>
 </tr>
 </table>
</p>

## Examples

```java
 @ConversionErrorFieldValidator(message = "Default message", key = "i18n.key", shortCircuit = true)
```