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61

JPA Persistable Types

, Mapped superclasses, Embeddable classes. Simple Java data types: Primitive types, Wrappers, String ... consideration. Simple Java Data Types All the following simple Java data types are persistable: Primitive types
38

[ODB1] Chapter 7 - JDOQL Queries

can participate in comparisons as if they were primitive numeric types (byte, short, char, int, long, float ... , and instances of user defined classes) is to use parameters. Primitive Type Parameters The first query ... of primitive values because execute(...) only accepts Object arguments. Reference Type Parameters
37

Query results are not up to date for entities, not primitives

updates. But, when using the JPQL Query, the list are refreshed, and, when I querying for primitive fields like Strings, the list of primitives are loading refreshed too. Any variations on update ... CriteriaBuilder to JPQL or from Entity to Primitive. What´s now? flavioreboucassantos Flávio Rebouças Santos
36

Inserted entities with strings as keys and indices needs more and more ram memory in comparing to primitive integers as keys and indices

primitive integers as keys and indices then the memory consumption for new entities is constant
32

[ODB1] Chapter 4 - JDO Metadata

, the group contains all the fields with primitive types (e.g. int), types defined in java.lang (e.g ... shown above) can have any of the following types: embedded value types: primitive type (boolean, byte ... indexes. Fields of value types (primitive types, wrapper types, String and Date) are embedded by
26

ObjectDB Object Database Features

) Enum classes Serializable types Persistent System Types (for persistent fields) Primitive types ... a @EmbeddedId field. Primary Key Data Types Primitives (boolean, byte, short, char, int, long, float and double
19

Index Definition

a value of one of the following persistable types: Primitive types: boolean, byte, short, char, int, long
19

JPA Primary Key

: } A primary key field that is set by the application can have one of the following types: Primitive types
19

Comparison in JPQL and Criteria API

for values of the following data types: Values of numeric types, including primitive types (byte, short
19

[ODB1] Chapter 3 - Persistent Classes

are also persistent types: All the primitive types - boolean, byte, short, char, int, long, float and double. Selected

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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