Getting data from ADF bindings programmatically

These are some useful code snippets to work with ADF bindings programmatically:

// get the binding container  
BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();  
  
// get an ADF attributevalue from the ADF page definitions  
AttributeBinding attr = (AttributeBinding)bindings.getControlBinding("test");  
attr.setInputValue("test");  
  
// get an Action or MethodAction  
OperationBinding method = bindings.getOperationBinding("methodAction");  
method.execute();  
List errors = method.getErrors();  
  
method = bindings.getOperationBinding("methodAction");  
Map paramsMap = method.getParamsMap();  
paramsMap.put("param","value")  ;        
method.execute();  

// Get the data from an ADF tree or table  
DCBindingContainer dcBindings = 
        (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();  
  
FacesCtrlHierBinding treeData = (FacesCtrlHierBinding)bc.getControlBinding("tree");  
Row[] rows = treeData.getAllRowsInRange();  
  
// Get a attribute value of the current row of iterator  
DCIteratorBinding iterBind= (DCIteratorBinding)dcBindings.get("testIterator");  
String attribute = (String)iterBind.getCurrentRow().getAttribute("field1");  
  
// Get the error  
String error = iterBind.getError().getMessage();  

// refresh the iterator  
bindings.refreshControl();  
iterBind.executeQuery();  
iterBind.refresh(DCIteratorBinding.RANGESIZE_UNLIMITED);  
  
// Get all the rows of a iterator  
Row[] rows = iterBind.getAllRowsInRange();  
TestData dataRow = null;  
for (Row row : rows) {  
  dataRow = (TestData)((DCDataRow)row).getDataProvider();  
}  

// Get the current row of a iterator , a different way  
FacesContext ctx = FacesContext.getCurrentInstance();  
ExpressionFactory ef = ctx.getApplication().getExpressionFactory();  
ValueExpression ve = ef.createValueExpression(ctx.getELContext(), 
                "#{bindings.testIter.currentRow.dataProvider}", TestHead.class);  
TestHead test = (TestHead)ve.getValue(ctx.getELContext());  

 
// get the selected rows from a table component  
RowKeySet selection = resultTable.getSelectedRowKeys();  
Object[] keys = selection.toArray();  
List receivers = new ArrayList(keys.length);  
for ( Object key : keys ) {  
  User user = modelFriends.get((Integer)key);  
}  
  
// get  selected Rows of a table 2  
for (Object facesRowKey : table.getSelectedRowKeys()) {  
 table.setRowKey(facesRowKey);  
 Object o = table.getRowData();  
 JUCtrlHierNodeBinding rowData = (JUCtrlHierNodeBinding)o;  
 Row row = rowData.getRow();  
 Test testRow = (Test)((DCDataRow)row).getDataProvider() ;  
}  

Useful code snippets for ADF Security

Here are some useful code snippets related to ADF Security (thanks to Edwin Biemond blog):

// print the roles of the current user  
for ( String role : ADFContext.getCurrent().getSecurityContext().getUserRoles() ) {  
   System.out.println("role "+role);  
}  
  
// get the ADF security context and test if the user has the role users         
SecurityContext sec = ADFContext.getCurrent().getSecurityContext();  
if ( sec.isUserInRole("users") ) {  
}  

// is the user valid  
public boolean isAuthenticated() {  
 return ADFContext.getCurrent().getSecurityContext().isAuthenticated();  
}
  
// return the user  
public String getCurrentUser() {  
 return ADFContext.getCurrent().getSecurityContext().getUserName();  
}  

How to call JavaScript from a ADF Managed Bean

To run a JS function from our Managed Bean, first put the JS code in a <af:resource> component in our JSF page:

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1" 
           xmlns:f="http://java.sun.com/jsf/core" 
           xmlns:pe="http://xmlns.oracle.com/adf/pageeditor" 
           xmlns:cust="http://xmlns.oracle.com/adf/faces/customizable" 
           xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
<af:resource type="javascript">
    function myFunc() { [ any JS code ] };
</af:resource>

In the managed bean, put the following code in the appropriate method (e.g. in a action listener if we want to execute the JS code after a commandButton or commandLink is selected):

import javax.faces.context.FacesContext;
import org.apache.myfaces.trinidad.render.ExtendedRenderKitService;
import org.apache.myfaces.trinidad.util.Service;
[…]
FacesContext facesContext = FacesContext.getCurrentInstance(); 
ExtendedRenderKitService service = (ExtendedRenderKitService) org.apache.myfaces.trinidad.util.Service.getRenderKitService(facesContext, ExtendedRenderKitService.class);
service.addScript(facesContext, "myFunc();");

CRUD generico con Java Reflection API, EclipseLink ed ICEFaces

Problema: abbiamo un nutrito insieme di tabelle anagrafiche con struttura simile (solitamente ID, DESCRIZIONE e pochi altri campi), e vorremmo offirire nella nostra applicazione Web le funzionalità CRUD su di esse. Quello che vogliamo assolutamente evitare è la replicazione del codice che offre queste funzionalità per ogni tabella da gestire: in sostanza, si desidera un approccio quanto più generico possibile al problema.

Voglio condividere con voi una soluzione a questo problema a mio avviso molto interessante, che fa uso estensivo delle Reflection API di Java, EJB 3.0, JPA (con EclipseLink 1.20 come persistence engine) per il backend, e IceFaces 1.8 per la parte grafica.