All about Rui Azevedo

Complex Use Case Diagram Example

Hi Mohamed!

Thank you for your reply. That is indeed a useful link, and I had already visited that page.

The problem is that, while it presents some interesting use case diagrams for my purposes, there are no corresponding textual descriptions.

10 years ago

OO, Patterns, UML and Refactoring

Complex Use Case Diagram Example

Hi guys!!

Does anyone know where I can find an example of a use case diagram with <<include>> and <<extend>> relationships between use cases, inheritance relationships between actors and use cases, and respective textual descriptions?

I would be much appreciated

10 years ago

OO, Patterns, UML and Refactoring

A question about login in JSF application

And what's the name of the security system?

10 years ago

JSF

Help with the State

I've never done it myself. But maybe you can find some pointers here and here.

10 years ago

JSF

Help with the State

For multiple pages, if you are using CDI, conversation scope is probably the most appropriate. Otherwise, you can go with session scope or define a custom scope of your own, but that is not so trivial.

10 years ago

JSF

Help with the State

You lose your values because a request scoped bean is destroyed and reconstructed with each request. Maybe view scope solves your problems, it stays alive as long as you stay on a page.

10 years ago

JSF

JSF UIComponents

Take a look at this. He does for datatables what you want to do with your components. You basically have to play with creating value expressions and whatnot programatically.

10 years ago

JSF

Dynamic JSF, programatically adding components

Hmm.. My .xhtml is this:

and this is the DynamicForm bean:

@Named
@SessionScoped
public class DynamicForm implements Serializable {
// Init --------------------------------------------------------------------------------------
private static List<WidgetConfigComponent> dynamicList;
private HtmlPanelGroup dynamicFormGroup; // Placeholder.
// Actions -----------------------------------------------------------------------------------
private void loadDynamicMap() {
dynamicList = new ArrayList<WidgetConfigComponent>();
dynamicList.addAll(WidgetConfigService.loadConfig(1));
}
private void populateDynamicForm() {
HtmlOutputText label;
dynamicFormGroup = new HtmlPanelGroup();
UIComponent uIComponent;
HtmlOutputText linebreak;
for (int i = 0; i < getDynamicList().size(); i++) {
// label construction
label = new HtmlOutputText();
label.setValueExpression("value",
createValueExpression("#{dynamicForm.dynamicList[" + i + "].label}",
String.class));
// widget construction
uIComponent = getDynamicList().get(i).addComponent(
"#{dynamicForm.dynamicList[" + i + "].selectedValue}",
"#{dynamicForm.dynamicList[" + i + "].selectableValues}");
// linebreak construction
linebreak = new HtmlOutputText();
linebreak.setValue("<br/>");
linebreak.setEscape(false);
// add the label, widget and linebreak to the form
dynamicFormGroup.getChildren().add(label);
dynamicFormGroup.getChildren().add(uIComponent);
dynamicFormGroup.getChildren().add(linebreak);
}
}
// Getters -----------------------------------------------------------------------------------
public HtmlPanelGroup getDynamicFormGroup() {
// This will be called once in the first RESTORE VIEW phase.
if (dynamicFormGroup == null) {
loadDynamicMap(); // Preload dynamic list.
populateDynamicForm(); // Populate editable datatable.
}
return dynamicFormGroup;
}
public List<WidgetConfigComponent> getDynamicList() {
return dynamicList;
}
// Setters -----------------------------------------------------------------------------------
public void setDynamicFormGroup(HtmlPanelGroup dynamicFormGroup) {
this.dynamicFormGroup = dynamicFormGroup;
}
// Helpers -----------------------------------------------------------------------------------
private ValueExpression createValueExpression(String valueExpression, Class<?> valueType) {
FacesContext facesContext = FacesContext.getCurrentInstance();
return facesContext.getApplication().getExpressionFactory().createValueExpression(
facesContext.getELContext(), valueExpression, valueType);
}
}

And this is the data table component, the one that's giving me problems:

public class DataTable extends WidgetConfigComponent{
public DataTable(String label, List<Object> selectableValues, String selectedValue) {
super(label, selectableValues, selectedValue);
}
public DataTable() {
}
@Override
public UIComponent addComponent(String bindingValue, String selectableOptions) {
// creates the table
HtmlDataTable hdt = new HtmlDataTable();
hdt.setValueExpression("value",
createValueExpression(selectableOptions, List.class));
hdt.setVar("dataItem");
hdt.setBorder(1);
// Create <h:column> for 'Chave' column.
HtmlColumn chaveColumn = new HtmlColumn();
hdt.getChildren().add(chaveColumn);
// Create <h:outputText value="Chave"> for <f:facet name="header"> of 'Chave' column.
HtmlOutputText chaveHeader = new HtmlOutputText();
chaveHeader.setValue("Chave");
chaveColumn.setHeader(chaveHeader);
// Create <h:inputText id="name" value="#{dataItem.chave}"> for the body of 'Chave' column.
HtmlInputText chaveInput = new HtmlInputText();
chaveInput.setId("chave"); // Custom ID is required in dynamic UIInput and UICommand.
chaveInput.setValueExpression("value",
createValueExpression("#{dataItem.chave}", String.class));
chaveColumn.getChildren().add(chaveInput);
// Create <h:column> for 'Valor' column.
HtmlColumn valueColumn = new HtmlColumn();
hdt.getChildren().add(valueColumn);
// Create <h:outputText value="Valor"> for <f:facet name="header"> of 'Valor' column.
HtmlOutputText valueHeader = new HtmlOutputText();
valueHeader.setValue("Valor");
valueColumn.setHeader(valueHeader);
// Create <h:inputText id="valor" value="#{dataItem.valor}"> for the body of 'Valor' column.
HtmlInputText valorInput = new HtmlInputText();
valorInput.setId("valor"); // Custom ID is required in dynamic UIInput and UICommand.
valorInput.setValueExpression("value",
createValueExpression("#{dataItem.valor}", String.class));
valueColumn.getChildren().add(valorInput);
return hdt;
}
}

The addComponent method ignores the bindingValue parameter, and the selectableOptions here evaluates to a list a of KeyValueItem. Which I present next:

When i try to run the project Glassfish tells me KeyValueItem doesn't have a readable property 'chave'.

It's a lot of code to go through, so if you can sort through it you have my deepest thanks.

10 years ago

JSF

Dynamic JSF, programatically adding components

Hey guys!

In a project I'm ivolved in I have to dynamically add some components. All was going well until I had to generate data tables dynamically. I'm iterating a list of "SomeObject" and when I try to access a property of that object Glassfish tells me that object doesn't have such a property that is readable. I have getters for those properties and SomeObject implements Serializable as well. I used BalusC resources but I'm having no luck. Tell me if you need any more detail. Thanks.

10 years ago

JSF

Football 2010 Winner speculation

Chris Baron wrote:

Ruud Gullit was an anti-apartheid supporter who dedicated his World- and European Footballer of the Year awards to Nelson Mandela, when he was in jail. He even made an anti-apartheid song.
Ajax Amsterdam has an subsidiary in cape town.

I had no idea, very interesting.

And i get what you're saying, if there's capable of turning the table against Brazil it's Robben.
But most importantly, let's hope it'll be a good match with no interference from the refs.

11 years ago

Meaningless Drivel

Football 2010 Winner speculation

Chris Baron wrote:But the Dutch have Arjen Robben and some sort of home advantage.

If we start naming individualities Brazil still wins =P
Why do you say Holland has some kind of home advantage, emigrants? Portugal would also have that against Spain, I don't think it matters too much.. Players can't hear anything besides the vuvuzelas :/

11 years ago

Meaningless Drivel

Football 2010 Winner speculation

nahh.. Holland's defence cant stop the brazillian atack.

11 years ago

Meaningless Drivel

Football 2010 Winner speculation

Maybe football is drama, but for many players the World Cup is a once in a lifetime opportunity. And to come out of the tournament after leaving everything on the field, just because the referee made a bad decision... It's frustrating to say the least.

11 years ago

Meaningless Drivel

Description of non-functional requirements

For a requirement to be a true requirement it has to be verifiable, otherwise you can't even call it a requirement.
Having that said, look at your requirements and at your project, and try to see if your project meets them successfully or not. You can base your response on that.

11 years ago

Architect Certification (OCMJEA)

New System Development: When to start data-modelling?

I'd say option 2 is the way to go.
OO design is a much richer way to model a problem (hierarchies, composition,etc).

11 years ago

OO, Patterns, UML and Refactoring

Rui Azevedo

Recent posts by Rui Azevedo