ADF_015：ADF-BC 特色功能之三：View Criteria

说明：本文最后一次修改时间：2011-11-05。
开发环境：JDeveloper 11.1.2.1.0。

完成 《Examining ADF Business Components New Features》之Creating a Named Query。
Named Query 定义View Object 结果集的过滤条件。

问题1：文档中的这段话是什么意思？
The key difference between a view object row of query results and a named query row is that the data type of each attribute in the view criteria row is String.
This key difference supports query-by-example operators and therefore allows the user to enter conditions such as "OrderId > 304", for example.

问题2：为什么要使用View Criteria？
Instead of adding a where clause in the View Object query definition, you could use a View Criteria with a bind variable.
The View Criteria could be applied to a single View Object instance instead of all instances of a View Object.
The programming approach is the same, just the configuration of the ADF Business Component Data Model is different.

Project 下载： ADFBC.7z。