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我想將postgres自定義類型，名爲transmission_result，映射到Hibernate/JPA POJO。 postgres自定義類型或多或少是一個枚舉類型的字符串值。試圖將Postgres枚舉映射到Hibernate/JPA pojo
我已經創建了一個名爲PGEnumUserType的自定義EnumUserType以及一個表示postgres枚舉值的枚舉類。當我針對真實數據庫運行此操作時，出現以下錯誤： '錯誤：列「狀態」屬於transmission_result類型，但表達式的類型是字符變化的 提示：您需要重寫或轉換表達式。 位置：135'
看到這個，我想我需要將我的SqlTypes更改爲Types.OTHER。但是這樣做會破壞我的集成測試（在內存數據庫中使用HyperSQL），並顯示以下消息： '由於：java.sql.SQLException：在語句中未找到表[select enrollment0 _。「id」as id1_47_0_，enrollment0 _。「tpa_approval_id」as tpa2_47_0_，enrollment0 _。「tpa_status_code」as tpa3_47_0_，enrollment0 _。「status_message」as status4_47_0_，enrollment0 _。「approval_id」as approval5_47_0_，enrollment0 _。「transmission_date」as transmis6_47_0_，enrollment0 _。「status」as status7_47_0_，enrollment0 _。「transmitter」as transmit8_47_0_ from 「transmissions」enrollment0_ where enrollment0 _。「id」=？]'
我不知道爲什麼在這個錯誤中更改sqlType結果。任何幫助表示讚賞。
JPA/Hibernate的實體：
@Entity
@Access(javax.persistence.AccessType.PROPERTY)
@Table(name="transmissions")
public class EnrollmentCycleTransmission {
// elements of enum status column
private static final String ACCEPTED_TRANSMISSION = "accepted";
private static final String REJECTED_TRANSMISSION = "rejected";
private static final String DUPLICATE_TRANSMISSION = "duplicate";
private static final String EXCEPTION_TRANSMISSION = "exception";
private static final String RETRY_TRANSMISSION = "retry";
private Long transmissionID;
private Long approvalID;
private Long transmitterID;
private TransmissionStatusType transmissionStatus;
private Date transmissionDate;
private String TPAApprovalID;
private String TPAStatusCode;
private String TPAStatusMessage;
@Column(name = "id")
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
public Long getTransmissionID() {
return transmissionID;
}
public void setTransmissionID(Long transmissionID) {
this.transmissionID = transmissionID;
}
@Column(name = "approval_id")
public Long getApprovalID() {
return approvalID;
}
public void setApprovalID(Long approvalID) {
this.approvalID = approvalID;
}
@Column(name = "transmitter")
public Long getTransmitterID() {
return transmitterID;
}
public void setTransmitterID(Long transmitterID) {
this.transmitterID = transmitterID;
}
@Column(name = "status")
@Type(type = "org.fuwt.model.PGEnumUserType" , parameters ={@org.hibernate.annotations.Parameter(name = "enumClassName",value = "org.fuwt.model.enrollment.TransmissionStatusType")})
public TransmissionStatusType getTransmissionStatus() {
return this.transmissionStatus ;
}
public void setTransmissionStatus(TransmissionStatusType transmissionStatus) {
this.transmissionStatus = transmissionStatus;
}
@Column(name = "transmission_date")
public Date getTransmissionDate() {
return transmissionDate;
}
public void setTransmissionDate(Date transmissionDate) {
this.transmissionDate = transmissionDate;
}
@Column(name = "tpa_approval_id")
public String getTPAApprovalID() {
return TPAApprovalID;
}
public void setTPAApprovalID(String TPAApprovalID) {
this.TPAApprovalID = TPAApprovalID;
}
@Column(name = "tpa_status_code")
public String getTPAStatusCode() {
return TPAStatusCode;
}
public void setTPAStatusCode(String TPAStatusCode) {
this.TPAStatusCode = TPAStatusCode;
}
@Column(name = "status_message")
public String getTPAStatusMessage() {
return TPAStatusMessage;
}
public void setTPAStatusMessage(String TPAStatusMessage) {
this.TPAStatusMessage = TPAStatusMessage;
}
}
定製EnumUserType：
public class PGEnumUserType implements UserType, ParameterizedType {
private Class<Enum> enumClass;
public PGEnumUserType(){
super();
}
public void setParameterValues(Properties parameters) {
String enumClassName = parameters.getProperty("enumClassName");
try {
enumClass = (Class<Enum>) Class.forName(enumClassName);
} catch (ClassNotFoundException e) {
throw new HibernateException("Enum class not found ", e);
}
}
public int[] sqlTypes() {
return new int[] {Types.VARCHAR};
}
public Class returnedClass() {
return enumClass;
}
public boolean equals(Object x, Object y) throws HibernateException {
return x==y;
}
public int hashCode(Object x) throws HibernateException {
return x.hashCode();
}
public Object nullSafeGet(ResultSet rs, String[] names, Object owner) throws HibernateException, SQLException {
String name = rs.getString(names[0]);
return rs.wasNull() ? null: Enum.valueOf(enumClass,name);
}
public void nullSafeSet(PreparedStatement st, Object value, int index) throws HibernateException, SQLException {
if (value == null) {
st.setNull(index, Types.VARCHAR);
}
else {
st.setString(index,((Enum) value).name());
}
}
public Object deepCopy(Object value) throws HibernateException {
return value;
}
public boolean isMutable() {
return false; //To change body of implemented methods use File | Settings | File Templates.
}
public Serializable disassemble(Object value) throws HibernateException {
return (Enum) value;
}
public Object assemble(Serializable cached, Object owner) throws HibernateException {
return cached;
}
public Object replace(Object original, Object target, Object owner) throws HibernateException {
return original;
}
public Object fromXMLString(String xmlValue) {
return Enum.valueOf(enumClass, xmlValue);
}
public String objectToSQLString(Object value) {
return '\'' + ((Enum) value).name() + '\'';
}
public String toXMLString(Object value) {
return ((Enum) value).name();
}
}
枚舉類：
public enum TransmissionStatusType {
accepted,
rejected,
duplicate,
exception,
retry}