About byte

manual

JPA Persistable Types

Explains how JPA manages types, including entity classes, embeddable classes, primitive types, wrappers, string, date, enum, collections and maps.... Primitive types: boolean , byte , short , char , int , long , float and double . ... classes from package java.lang: Boolean , Byte , Short , Character , Integer , Long , Float and Double ...

 
manual

Database Schema Evolution

Explains how ObjectDB handles automatically schema changes.... numeric type. In this context numeric types are: byte , short , char , int , long , float , double , Byte , Short , Character , Integer , Long , Float , Double , ...

 
forum_thread

Non Embedded byte[]

I am trying to understand the "embedded=false" for JDO byte[] as described in ObjectDB 1.0 Manual, sections 4.3 and 4.4.   I desire to store an image as a byte[] but I don't want the byte[] to be loaded on the loading of the persistent object that has my image's attributes.  The byte[] would only be loaded from the datastore if my image's attribute evaluation deemed that it need to be loaded.   Can you give a JDO example of how to achieve this?   For example: ... I am trying to understand the "embedded=false" for JDO byte[] as described in ObjectDB 1.0 Manual, sections 4.3 and 4.4.   I desire to store an image as a byte[] but I don't want the byte[] to be loaded on the loading of the ...

 
forum_thread

Problem with byte arrays in JDO - ClassCastException

A bizarre ClassCastException is thrown if I attempt to obtain a byte array field as the result of a Query: Exception in thread "main" java.lang.ClassCastException: java.lang.Boolean cannot be cast to [B at spiffy.test.ObjectdbTest.main(ObjectdbTest.java:44) ... ClassCastException is thrown if I attempt to obtain a byte array field as the result of a Query: Exception in thread "main" ... ; example1. setData ( new byte [ 1 ] ) ; example1. getData ( ...

 
forum_thread

Problem with byte arrays in JDO - internal exception

This code generates an internal exception: ... ; example1. setData ( new byte [ 1 ] ) ; example1. getData ( ... ; example2. setData ( new byte [ 2 ] ) ; example2. getData ( ...

 
issue

Page #9 entry 0 (key 'bjjl') has 75 extra bytes / Unexpected last index ID: -119 (expected -116)

Please check the attached database file. When running the Doctor, I get   Global Value Errors ------------------- [1] Unexpected last index ID: -119 (expected -116) Page Content Errors ------------------- [1] Page #9 entry 0 has unexpected object format [2] Page #9 entry 0 (key 'bjjl') has 75 extra bytes   Both errors are not fixable. When creating a new db file with the Doctor, this file yields the same errors. Please advise.  ... fine and there was a false alarm of the Doctor in checking byte arrays. Build 2.4.1 fixes this problem. ...

 
forum_thread

Soft Reference Object Cache Recommendation

(Trying again.  Last post, ~50 minutes to compose, failed, possibly due to an attachment upload size limit being exceeded before the post attempt.  =(  ) ... I attempted to use Java SoftReference to my large byte[] and instruct ObjectDB to use soft reference for its Level One (L1) ... My persisted class, "JdoBlob2", only contains a byte[] and uses a soft reference to make that array eligible for GC when the ...

 
api-jpa

transform(loader, className, classBeingRedefined, protectionDomain, classfileBuffer)

Invoked when a class is being loaded or redefined.(Method of javax.persistence.spi.ClassTransformer)

 
forum_thread

@OneToMany(fetch = FetchType.LAZY) list is always null

Hello. @OneToMany(fetch = FetchType.LAZY) doesn't work when using EJB or something else related to J2EE. parent.getChildren() returns null. Here is a simple example: Bean: ... the entity containing another one (OneToOne) entity with a byte[] array without calling the getter of the array of the child entity, the ... ByteData { // ... id private byte [ ] data ;   public ByteData ( ...

 
forum_thread

Storing Images

What is the best way to store images? As external files? In the database as blobs? Are blobs supported?... to persist the images, i just store an array of bytes (byte[]) representing the encoded images.  i.e. a class which has a field of type byte array.  to turn the bytes into an image, i use a UI toolkit called HCIL ...