Hibernate忽略转换器

Question

我得到ClassCastException: at.sheldor5.tr.api.time.RecordType cannot be cast to java.lang.Boolean，因为Hibernate 5.2.9.FINAL完全忽略了我的转换器：

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="at.sheldor5.tr.api.time">
    <class name="Record" table="RECORDS">
        <id name="id" type="int" column="PK_RECORD_ID">
            <generator class="native"/>
        </id>
        <many-to-one name="user" column="FK_USER_MAPPING_ID" class="at.sheldor5.tr.api.user.UserMapping"/>
        <property name="date" type="java.time.LocalDate" column="DATE" index="I_DATE"/>
        <property name="time" type="java.time.LocalTime" column="TIME"/>
        <property name="type" type="boolean" column="TYPE">
            <type name="at.sheldor5.tr.persistence.converter.RecordTypeAttributeConverter"/>
        </property>
    </class>
</hibernate-mapping>

转换器：

@Converter
public class RecordTypeAttributeConverter implements AttributeConverter<RecordType, Boolean> {
  @Override
  public Boolean convertToDatabaseColumn(final RecordType attribute) {
    if (attribute == null) {
      return null;
    }
    return attribute.getBoolean();
  }

  @Override
  public RecordType convertToEntityAttribute(final Boolean dbData) {
    return RecordType.getType(dbData);
  }
}

我唯一能看到的是，由于一些随机的事情，hibernate会忽略我的转换器。

任何建议（除了我已经尝试过的清洁/重建或硬重置）？

编辑：我的转换器甚至无法加载......