With regard to the creation of the EO

Hello

While creating an entity with the subject entity, to step - wizard object 4 (JAVA) most of the tutorial exercises ask check/generate java for entityIMPL files
but not < entity > DefImpl or < entity > CollImpl.

Can someone tell me please the use of the above two java files and when we build them into our application


Thank you
Ravi

Hello

definition of entity class

A class that extends directly or indirectly from oracle.jbo.server.EntityDefImpl. It stores metadata from runtime describing the purpose of the entity, including the attributes, events, validators, associations and properties. When it is instantiated, it describes all instances of the entity object class.

A client can call methods to find information on the purpose of the entity, such as the names of attributes and types, source of the database and so on. There is an instance of the entity definition file XML entity class. You can use the object entity and Publisher wizard to generate the Java class to an entity object when you need custom create and find methods.

This class is a good place for the methods group that are used by all instances of the entity object. For example, you can optionally modify the createDef method to use properties from another source (in addition to or instead of XML) when the entity definition is instantiated.

If an entity object publishes or subscribes to an event (as specified in the pages of publication and subscription of the editor and the entity object Wizard), most of the code for the event is generated in the definition files of the entity objects that publish and subscribe. You can specify that this class extends a custom class (which must directly or indirectly extend the EntityDefImpl class and be in the classpath of the project); for example, you can do it if you want to reuse the code that has already been written or if your organization wants to customize the infrastructure of business components to meet needs.

Source: Oracle Documentation

Thank you
-Anil
http://oracleanil.blogspot.com/

Tags: Oracle Applications

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