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Difference between revisions of "EclipseLink/UserGuide/JPA/Basic JPA Development/Configuration/JPA/Defaults"

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{{EclipseLink_UserGuide
 
|info=y
 
|toc=n
 
|eclipselink=y
 
|eclipselinktype=JPA}}
 
=About the Default Configuration Values=
 
Each annotation has a default value (consult the JPA specification for defaults). A persistence engine defines defaults that apply to the majority of applications. You only need to supply values when you want to override the default value. Therefore, having to supply a configuration value is not a requirement, but the exception to the rule. This is known as ''configuration by exception''.
 
{{EclipseLink_Note
 
|note=You should be familiar with the defaults to be able to change the behavior when necessary. }}
 
{{EclipseLink_Spec
 
|link=http://jcp.org/en/jsr/detail?id=220
 
|section=Chapter 10 "Metadata Annotations"
 
}}
 
  
{{EclipseLink_JPA
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|previous=[[EclipseLink/UserGuide/JPA/Basic JPA Development/Configuration/JPA/orm.xml|Specifying Object-Relational Mappings Using orm.xml]]
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|next=[[EclipseLink/UserGuide/JPA/Basic JPA Development/Configuration/JPA/eclipselink-orm.xml|Specifying EclipseLink Object-Relational Mappings Using eclipselink-orm.xml]]
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'''[[Image:Elug_draft_icon.png|Warning]] See "Default Configuration Values" in the [http://www.eclipse.org/eclipselink/documentation/ EclipseLink Concepts Guide]'''
|up=[[EclipseLink/UserGuide/JPA/Basic JPA Development/Configuration|Configuration]]
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|version=2.2.0 DRAFT}}
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Latest revision as of 11:49, 25 January 2013


Warning See "Default Configuration Values" in the EclipseLink Concepts Guide