AWS Dynamo建表注释问题

com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMappingException: not supported; requires @DynamoDBTyped or @DynamoDBTypeConverted

model Java为：

@DynamoDBTable(tableName="patent_legal_official")
public class PatentLegalOfficialModel extends Jsonable {
   private String patent_legal_id;

   private String patent_source_id;

   private String country;

   private String  apno_official;

   private String apno;

   private Set<String> patent_id;

   private String patent_type;

   private String status;

   private Long status_date;

   private Long invalid_date;

   private List<Transaction> transaction;

   private Long create_ts;

   private Long update_ts;

   @DynamoDBHashKey
   public String getPatent_legal_id() {
      return patent_legal_id;
   }

   public void setPatent_legal_id(String patent_legal_id) {
      this.patent_legal_id = patent_legal_id;
   }

   public String getPatent_source_id() {
      return patent_source_id;
   }

   public void setPatent_source_id(String patent_source_id) {
      this.patent_source_id = patent_source_id;
   }

   public String getCountry() {
      return country;
   }

   public void setCountry(String country) {
      this.country = country;
   }

   public String getApno_official() {
      return apno_official;
   }

   public void setApno_official(String apno_official) {
      this.apno_official = apno_official;
   }

   public String getApno() {
      return apno;
   }

   public void setApno(String apno) {
      this.apno = apno;
   }

   public Set<String> getPatent_id() {
      return patent_id;
   }

   public void setPatent_id(Set<String> patent_id) {
      this.patent_id = patent_id;
   }

   public String getPatent_type() {
      return patent_type;
   }

   public void setPatent_type(String patent_type) {
      this.patent_type = patent_type;
   }

   public String getStatus() {
      return status;
   }

   public void setStatus(String status) {
      this.status = status;
   }

   public Long getStatus_date() {
      return status_date;
   }

   public void setStatus_date(Long status_date) {
      this.status_date = status_date;
   }

   public Long getInvalid_date() {
      return invalid_date;
   }

   public void setInvalid_date(Long invalid_date) {
      this.invalid_date = invalid_date;
   }

   public List<Transaction> getTransaction() {
      return transaction;
   }

   public void setTransaction(List<Transaction> transaction) {
      this.transaction = transaction;
   }

   public Long getCreate_ts() {
      return create_ts;
   }

   public void setCreate_ts(Long create_ts) {
      this.create_ts = create_ts;
   }

   public Long getUpdate_ts() {
      return update_ts;
   }

   public void setUpdate_ts(Long update_ts) {
      this.update_ts = update_ts;
   }
}

@DynamoDBTable和@DynamoDBHashKey都存在的

一时找不到原因在哪里，后面注意到了方法
public List<Transaction> getTransaction() {
      return transaction;
   }

Transaction是一个document

public class Transaction {

    private String event;
    private String journal_vol;
    private Long pub_date;
    private Long event_date;


    public String getEvent() {
        return event;
    }

    public void setEvent(String event) {
        this.event = event;
    }

    public String getJournal_vol() {
        return journal_vol;
    }

    public void setJournal_vol(String journal_vol) {
        this.journal_vol = journal_vol;
    }

    public Long getPub_date() {
        return pub_date;
    }

    public void setPub_date(Long pub_date) {
        this.pub_date = pub_date;
    }

    public Long getEvent_date() {
        return event_date;
    }

    public void setEvent_date(Long event_date) {
        this.event_date = event_date;
    }
}

发现少了@DynamoDBDocument标签，加上就成功入库了
API参考：http://docs.amazonaws.cn/amazondynamodb/latest/developerguide/DynamoDBMapper.Annotations.html