UIX/BC4J: Page properties/Events/Methods

Question

The following is code for a UIX page event handler and a method that attempts to locate the data that is selected from a bc4j:table, use it, and then handle redirection to the next page.
I had to comment out the setPageProperty block due to an error, oracle.jbo.Key, that keeps the method from running. This also means my page property is not available for use by the method.
When the method runs I expected to be able to see the row that was selected in the table by virtue of the findRowByKey ... keyBinding ... selectionKey. Instead, the return value for the line: Row row = vo.getCurrentRow(); is always the last record in the view object.
This led me to the alternative plan to create a page property for the selectedKey and use vo.getRow(key) to get the record. This won't work for me because I can't get the page property to work.
Can you help me with my understanding/syntax please?
**** UIX Event Handler ****
<event name="getemployee">
<bc4j:findRootAppModule name="AppModule">
<bc4j:findViewObject name="VO">
<bc4j:findRowByKey>
<bc4j:keyBinding>
<bc4j:selectionKey name="viewTable" key="key"/>
</bc4j:keyBinding>
<bc4j:handlers>
<!-- Gives page error: oracle.jbo.Key -->
<!--
<bc4j:setPageProperty name="selectedKey">
<bc4j:selectionKey name="viewTable" key="key"/>
</bc4j:setPageProperty>
-->
<method class="PageController" method="getInfo" />
</bc4j:handlers>
</bc4j:findRowByKey>
</bc4j:findViewObject>
</bc4j:findRootAppModule>
</event>
**** Method that should use page property to display record from view object. ****
public static synchronized EventResult getEmployeeInfo(BajaContext context,
Page page,
PageEvent event) {
ViewObject vo = ServletBindingUtils.getViewObject(context);
String selectedKey = page.getProperty("selectedKey");
System.out.println("selectedKey: " + selectedKey); //null
// I am hoping to get the property here.
//Row row = vo.getRow(selectedKey);
Row row = vo.getCurrentRow();
System.out.println("Current Info- Item1:" + row.getAttribute("Item1") +
", Item2: " + row.getAttribute("Item2"));
}

Answer 1

Hello Vincent,
I'm not sure why it does not work. Perhaps you haven't set the keystamp in your table?
<bc4j:keyStamp>
<bc4j:rowKey name="key"/>
</bc4j:keyStamp>
Besides your code tries to get the row in two times. Once in your event handler and ones in your method. That's not necessary, just do it once, either in your UIX page or in your Java method.
If you do it in your UIX page, you can get the row directly in your method. Here is an example:
UIX
<bc4j:findRootAppModule name="appModule">
<bc4j:findViewObject name="viewObject">
<bc4j:findRowByKey>
<bc4j:keyBinding>
<bc4j:selectionKey name="viewTable" key="key"/>
</bc4j:keyBinding>
<bc4j:handlers>
<method class="..." method="doSomething" />
</bc4j:handlers>
</bc4j:findRowByKey>
<bc4j:executeQuery/>
</bc4j:findViewObject>
</bc4j:findRootAppModule>
Then you can access row in your method
Row row = (Row)bajaContext.getProperty("http://xmlns.oracle.com/uix/bc4j", "row");
Regards,
Christian