जावा में एक कस्टम LTreeType वर्ग को निम्नानुसार कार्यान्वित करें:
public class LTreeType implements UserType {
@Override
public int[] sqlTypes() {
return new int[] {Types.OTHER};
}
@SuppressWarnings("rawtypes")
@Override
public Class returnedClass() {
return String.class;
}
@Override
public boolean equals(Object x, Object y) throws HibernateException {
return x.equals(y);
}
@Override
public int hashCode(Object x) throws HibernateException {
return x.hashCode();
}
@Override
public Object nullSafeGet(ResultSet rs, String[] names, Object owner)
throws HibernateException, SQLException {
return rs.getString(names[0]);
}
@Override
public void nullSafeSet(PreparedStatement st, Object value, int index)
throws HibernateException, SQLException {
st.setObject(index, value, Types.OTHER);
}
@Override
public Object deepCopy(Object value) throws HibernateException {
return new String((String)value);
}
@Override
public boolean isMutable() {
return false;
}
@Override
public Serializable disassemble(Object value) throws HibernateException {
return (Serializable)value;
}
@Override
public Object assemble(Serializable cached, Object owner)
throws HibernateException {
return cached;
}
@Override
public Object replace(Object original, Object target, Object owner)
throws HibernateException {
// TODO Auto-generated method stub
return deepCopy(original);
}
}
और एंटिटी क्लास को इस प्रकार एनोटेट करें:
@Column(name = "path", nullable = false, columnDefinition = "ltree")
@Type(type = "LTreeType")
private String path;