运行环境:JDeveloper 11.1.2.1.0 + Oracle Database 10g Express Edition 10.2.0.1。
Table的默认Selection Listener形如:selectionListener="#bindings.JobsView1.collectionModel.makeCurrent}"。
有时我们需要定制化Table的Selection Listener,比如在makeCurrent执行前后加入自己的逻辑。
这就需要把Selection Listener指向Managed Bean中的一个方法,比如:
selectionListener="#{backingBeanScope.myBackingBean.tableSelectionListener}" 。
然后在该方法中用代码实现makeCurrent功能,并在其前后加入自己的逻辑。
重点步骤说明:
1. 修改Table的Selection Listener,指向Managed Bean中的方法
2. Managed Bean的完整代码
package view;
import javax.faces.event.ActionEvent;
import oracle.adf.model.BindingContext;
import oracle.adf.model.binding.DCIteratorBinding;
import oracle.adf.view.rich.component.rich.data.RichTable;
import oracle.binding.BindingContainer;
import oracle.jbo.Key;
import oracle.jbo.Row;
import oracle.jbo.uicli.binding.JUCtrlHierBinding;
import oracle.jbo.uicli.binding.JUCtrlHierNodeBinding;
import org.apache.myfaces.trinidad.event.SelectionEvent;
import org.apache.myfaces.trinidad.model.CollectionModel;
import view.util.ADFUtils;
import view.util.JSFUtils;
public class MyBackingBean {
public MyBackingBean() {
super();
}
public void tableSelectionListener(SelectionEvent selectionEvent) {
System.out.println("############# Before Make Current Row of Table #############");
makeCurrentRow(selectionEvent);
System.out.println("############# After Make Current Row of Table #############");
}
public void printButton_ActionListener(ActionEvent evt) {
BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
DCIteratorBinding iter = (DCIteratorBinding)bindings.get("JobsView1Iterator");
Row row = iter.getCurrentRow();
System.out.println("############## The Selected Row Data: " + row.getAttribute("JobId") + " " + row.getAttribute("JobTitle"));
}
private static void makeCurrentRow(SelectionEvent selectionEvent) {
RichTable rt = (RichTable)selectionEvent.getSource();
CollectionModel cm = (CollectionModel)rt.getValue();
JUCtrlHierBinding tableBinding = (JUCtrlHierBinding)cm.getWrappedData();
DCIteratorBinding iter = tableBinding.getDCIteratorBinding();
JUCtrlHierNodeBinding selectedRowData = (JUCtrlHierNodeBinding)rt.getSelectedRowData();
Key rowKey = selectedRowData.getRowKey();
iter.setCurrentRowWithKey(rowKey.toStringFormat(true));
Row row = selectedRowData.getRow();
System.out.println("%%%%%%%%%%%%%%% The Selected Row Data: " + row.getAttribute("JobId") + " " + row.getAttribute("JobTitle"));
}
}
3. 如何获取Table的当前行数据
在上面的代码中,我分别使用了两种方式获取Table的当前行数据:
(1)已经获得了RichTable对象
可以调用RichTable.getSelectedRowData()方法,然后在调用getRow()方法获取行对象,最后获取行对象的每个Attribute。
(2)如果无法获得RichTable对象,可以从DCIteratorBinding查找Table绑定的Iterator,然后调用getCurrentRow()获取当前行对象。
Project 下载:ADF_Table_SelectionListener.7z
参考文献:
1. http://www.oracle.com/technetwork/developer-tools/adf/learnmore/23-generic-table-selection-listener-169162.pdf
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