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Hi, I have an object I am trying to persist (java) - It has several fields of type long [][]. It is taking very long to persist and sometimes never finish - it hangs on getTransaction().commit ... ; private static final long serialVersionUID = 1L;     public @Id String id;   

key cannot be modified. It represents the entity object as long as it exists in the database. As ... is a sequential 64 bit number ( long ) that is set automatically by ObjectDB for every new entity object ... a primary key field: @Entity public class Project { @Id @GeneratedValue long id; // still set

Hi, I need to change field type in our model from long to String. After changing filed type in our model and repairing database with doctor, most of our entities is gone. Doctor puts some errors ... documentation? lwalkowski Lukasz Walkowski Changing a field from long to String should not require any

;   long t0 = System.currentTimeMillis();         projects ... ; private Long id;     ..     ..    

such long wait times? CAPdev CAP Dev There are no known issues that may be related. How do you know

EntityManager.refresh takes a long time for entity object Person in this code:     logger.log(Level.INFO, "begin select for person " + new Date().toString());                TypedQuery personQuery =  

: Could you explain the long time for first persist? btc_es BTC EmbeddedSystems Some operations

Hi! I have seen a strange behavior of ObjectDB Explorer: it shows @Id as being Long , not Integer as it's normally declared in the java class. This happens now with all entities in all 3 databases used for one project. If I open one of the entities in the explorer, then I click on it's id (in

( strategy = GenerationType . AUTO ) long id; : } AUTO is the default strategy, so the following definition is equivalent: @Entity public class EntityWithAutoId2 { @Id @GeneratedValue long id ... = GenerationType . IDENTITY ) long id; : } The IDENTITY strategy also generates an automatic value

, which is a Long object reflecting the number of Country objects in the database: TypedQuery query = em. createQuery ( "SELECT COUNT(c) FROM Country c", Long .class); long countryCount = query. getSingleResult ... and the code is simple: Query query = em. createQuery ("SELECT COUNT(c) FROM Country c"); long countryCount

type to any numeric type. In this context numeric types are: byte , short , char , int , long , float , double , Byte , Short , Character , Integer , Long , Float , Double , BigInteger , BigDecimal ... collection or array type, as long as the elements are convertible (e.g. from int[] to ArrayList

: SingularAttribute id1 = entityType. getId ( Long .class); // Gets a single ID attribute - excluding inherited: SingularAttribute id2 =   entityType. getDeclaredId ( Long .class); // Checks ... the version attribute - excluding inherited: SingularAttribute v1 = entityType. getVersion ( Long .class

and primary key: em. find (MyEntity2.class, Long .valueOf(1),      Collections ... operation. For example: em. find (MyEntity2.class, Long .valueOf(1),    Collections. singletonMap ... = cache. contains (MyEntity.class, Long .valueOf(id)); Cached entity objects can be removed from the cache

System Types (for persistent fields) Primitive types (boolean, byte, short, char, int, long , float, double). Wrapper types (Boolean, Byte, Short, Character, Integer, Long , Float, Double). java.lang ... . Primary Key Data Types Primitives (boolean, byte, short, char, int, long , float and double). Wrappers

, byte , short , char , int , long , float and double . Equivalent wrapper classes from package java.lang: Boolean , Byte , Short , Character , Integer , Long , Float and Double . java.math.BigInteger ... and map types are supported, as long as their values (i.e. elements in collections and arrays and keys

is used as with binary arithmetic operations in Java (e.g. for int and long operands the MOD function returns a long value). The SQRT Function The SQRT function returns the square root ... demonstrate only integer expressions, but all the numeric types ( byte , short , int , long , float

of SQL: COUNT - returns a long value representing the number of elements. SUM - returns the sum ... that letter's group as a Long object and the third cell contains the distinct number of currencies ... aggregate expressions: count , countDistinct - return a long type expression representing the number

a generic java.lang.Object , as long as the type of the actual value at runtime is persistable (or null ... public class EntityWithVersionField { @Version long version; } If a version field exists, ObjectDB

: Primitive types: boolean , byte , short , char , int , long , float , double. Equivalent wrapper classes from package java.lang: Byte , Short , Character , Integer , Long , Float , Double. java.math

, including primitive types ( byte , short , char , int , long , float , double ), wrapper types ( Byte , Short , Character , Integer , Long , Float , Double ),  BigInteger and BigDecimal can be compared

. As long as the relevant data in the database is unchanged cached results can be returned instead

long path expression (which is not an option for a collection). For example: SELECT c, c.capital.name

fields of an entity object can be accessed freely, regardless of the current fetch policy, as long as

. Retention of Your Personal Data The Company will retain Your Personal Data only for as long as

) are also supported. Following are examples of valid numeric literals in JPQL: int : 100, -127, 0, 07777 long

connections from any machine as long as a valid username and password are provided

Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue private long id ... Long getId() { return id; } public int getX() { return x; } public int getY() { return y; } @Override

static final long serialVersionUID = 1L; @Id @GeneratedValue private long id; private int x; private int y; public Point() { } Point(int x, int y) { this.x = x; this.y = y; } public Long getId

static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private

final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private String

{ private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id

final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private String

static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private

implements Serializable { private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private String name; private Date signingDate; // Constructors: public

, 0, 0xFFFF, 07777 , ... long 2003L, -127L, 0L, 0xFFFFL, 07777L , ... float 3.14F, 0f, 1e2f, -2.f, 5 ... all six comparison operators. Numeric wrapper types ( Byte , Short , Character , Integer , Long , Float ... numeric types ( byte , short , char , int , long , float , double ). Logical Operators Logical

GuestServlet extends HttpServlet { private static final long serialVersionUID = 1L; @Override

GuestServlet extends HttpServlet { private static final long serialVersionUID = 1L; // Injected DAO EJB

long serialVersionUID = 1L; // Injected DAO EJB: @EJB GuestDao guestDao; @Override protected void

final long serialVersionUID = 1L; @Override protected void doGet( HttpServletRequest request

number of users. As long as only one user is involved, a simple configuration as demonstrated in ... , might be less selective and allow connections from any machine, as long as valid username and password

, int , long , float and double . Selected classes in package java.lang : Boolean , Byte , Short , Character , Integer , Long , Float , Double , Number and String . Selected classes in package java

. Optimistic transactions may be a good choice when long running transactions are required. This would avoid the excessively long object locking periods that datastore transactions may cause. On short

: embedded value types: primitive type ( boolean , byte , short , char , int , long , float or double ) embedded wrapper ( Boolean , Byte , Short , Character , Integer , Long , Float or Double ) embedded

, and so on. Once assigned, the object ID cannot be modified or replaced. It represents the object as long as

edition and the free database edition in embedded mode as long as the database and the web server

semicolons. Since: JDO 1.0 long deletePersistentAll () Deletes all the instances of the candidate class ... long deletePersistentAll (Map parameters) Deletes all the instances of the candidate class ... of the candidate class that were deleted See Also: deletePersistentAll () Since: JDO 2.0 long

of the field Return: the new value for the field Since: JDO 1.0 long getLongField (PersistenceCapable pc, int field,  long  currentValue) Return the value for the field. Parameters ... (PersistenceCapable pc, int field,  long  currentValue) The value of the field

; javax.jdo.identity.LongIdentity This class is for identity with a single long field. Since: JDO 1.0 ... (Class pcClass,  Long  key) Constructor with class and key. Parameters: pcClass ...  pcClass,  long  key) Constructor with class and key. Parameters: pcClass - the class

value is not available, throw JDODataStoreException. Return: the current value Since: JDO 2.0 long currentValue () Returns the current sequence value as a long . If the current sequence value is not ... is not available, throw JDODataStoreException. Return: the next value Since: JDO 2.0 long nextValue

JDO Method in javax.jdo.Query void setRange (    long  fromIncl,     long  toExcl ) Set the range of results to return. The execution of the query is modified ... -based inclusive start index toExcl - 0-based exclusive end index, or {@link Long #MAX_VALUE} for no limit. Since: JDO 2.0