Controller is the object. The code present in ProcessFormRequest gets executed up on the user action.
For a ‘POST’ request the data on the page is binded to the view object in this method.
It is a .dbc file which is specified in the project properties. The location of this file on the server is $FND_TOP/secure.
PR method is called when the page is getting rendered onto the screen.
OAPageBean is responsible for creating the bean hierarchy structure at runtime after calling ProcessRequest() of each of the be in the hierarchy.
The application module which is associated with the top-level page region (the pageLayout region) is root application module.
Following are the components of BC4J:
UIX is an extensible, J2EE-based framework for building web applications. It is based on the Model-View-Controller (MVC) design pattern, which provides the foundation for building scalable enterprise web applications.
An association object is created where we link EO’s. For example take the search page where we link the same EO to form a association between the manager and employee. Every employee should have a manager associated. But if it President then no there is no manager associated. This is a perfect example to understand the AO.
The EO and AO will be present in the schema.server package.
Oracle Apps Framework has an OA Personalization Framework associated with it so that you can personalize any OAF page in an Oracle E-business Suite application without changing the basic or underlying code of that OA Framework page, Oracle Application Framework makes it very easy to personalize the appearance of the page or even the personalization of data displayed on to an OA Framework page.
PFR method is called when we perform some action on the screen like click of submit button or click on lov.
View object encapsulates the database query. It is used for selecting data. It provides iteration over a query result set.VO’s are primarily based on Eo’s. It can be used on multiple EO’s if the UI is for update. It provides a single point of contact for getting and setting entity object values. It can be linked together to form View Links.
MVC (Model, View, Controller)
Lists the components in the MVC architecture
Model: Application Module, View Objects, View Links, Entity Objects, Entity Associations etc.
View: Page, Region, Attribute sets etc.
Controller: Controller class files
Business Components for Java is JDeveloper’s programming framework for building multitier database applications from reusable business components. These applications typically consist of:
View objects can be created in the Business components package, can be based on entity objects or an sql query. View objects based on sql query are read only view objects.
Customization is under direct user control. The user explicitly selects between certain options. Using customization a user can:
Extension is about extending the functionality of an application beyond what can be done through personalization. Using extension we can:
It is a BC4J(Business Component for Java) object which encapsulates the query results. View objects will support the display of the content to user in the Page.
No..Root AM cannot be extended.
EO encapsulates the business logic and rules.EO’s are used for Inserting, Updating and Deleting data. This is used for validating across the applications. We can also link to other EO’s and create a Association object.
ProcessRequest() method of the Controller file is the right place.
VO is located in the View Layer in MVC which is responsible for presenting the data to the user.
Controller is the java file and can be associated to a complete OAF page or to a specific region.
There are several tasks you will do routinely in your code.
The logic for accomplishing all these tasks is written in controller.
XML is a markup language for documents containing structured information.
Structured information contains both content (words, pictures, etc.) and some indication of what role that content plays (for example, content in a section heading has a different meaning from content in a footnote, which me something different than content in a figure caption or content in a database table, etc.).
They are the VVO’s used in validation of attributes, they are the BC4J components and have their AM ie VAM Validation Application Module.
JavaBe is an object-oriented programming interface that lets you build re-useable applications or program building blocks called components that can be deployed in a network on any major operating system platform.
MDS is MetaData Service. When a web page is broken into small units like buttons,fields etc they are stored in a database. These are not stored as binary files but as data in tables. The data are present in JDR tables. MDS provides service to store & return page definitions. MDS collects those definitions in components/fields in a meaningful manner to build a page.
OAF Controller is the main class and our controller will become subclass of it.
eg. HashMap variablename=nre HashMap();
A view link is an active link between view links. A view link can be created by providing the source and destination views and source and destination attributes. There are two modes of View link operation that can be performed. A document and Master/Detail operation.
They are located in the oracle.apps...server
They are located in oracle.apps...webui
Extension is when you take an already existing component ex an OAF page or a region and then add some more functionality to it without disturbing the original functionality.
They are located in the oracle.apps...schema.server
QueryBean is used to execute and return the results of a query on behalf of the QueryPortlet application.