InputFile value lost after the validation fires

Hi all

I use Jdeveloper 11.1.1.5.
I have a date. MinValue, InputFile and a commandButton control.

Requirement: -.
1. the user will select the file using the InputFile component, and then he clicks the command button to process the file.
2. but if the date value. MinValue is null, the system will display an error message that the value of Date entry is necessary. (Note:-c' is just an example, the scenario real business contains a complex logic here).
3. If the value is available in date. MinValue, the system will process the file.

Now the problem is that if the user selects the file & directly click on the button, then as the component date. MinValue does not contain a value, it will show a mssage error, but at the same time the inputFile changes through update.
Now, if the user selects a value in the date, and then he clicks the button, the value of inputFile in my managed bean will be void. Given that the user is nt going to browse the file again. In any case, there should be a way to get the value of the inputFile.

This is my code jspx: -.
< af:form id = "f1" usesUpload = "true" binding = "#{backingBeanScope.PanelSplitterBean.f1}" >
< af:inputDate label = "Label 1" id = "id1" binding="#{backingBeanScope.PanelSplitterBean.id1}"/ >
< af:commandButton text = "commandButton 1" id = "cb1" action ="#{backingBeanScope.PanelSplitterBean.executeFile} '"
partialSubmit = "true" binding="#{backingBeanScope.PanelSplitterBean.cb1}"/ >
< af:inputFile label = "Label 1"id = "if1' valueChangeListener =" #{backingBeanScope.PanelSplitterBean.getFile} ".
Binding="#{backingBeanScope.PanelSplitterBean.IF1}"/ >
< / af:form >

This is my bean managed code: -.
file UploadedFile private;
private text RichInputText;
private RichInputFile if1.
private RichCommandButton cb1;
private RichInputDate id1;
private RichForm f1;
private RichMessages m1;
private RichDocument d1;
private UploadedFile fo;

{} public void getFile (ValueChangeEvent valueChangeEvent)
Add the code in the event here...
file = (UploadedFile) valueChangeEvent.getNewValue ();
}

public String executeFile() {}
Add the code in the event here...
try {}
Here, it may be any postings business logic
{if (ID1. GetValue () is nothing)}
FacesContext.getCurrentInstance () .addMessage (id1.getClientId (FacesContext.getCurrentInstance ()),
new FacesMessage (FacesMessage.SEVERITY_ERROR,
"The date is requested."
"Please enter date"));

}
else {}
Gets the file with the null value if the validation of Date fires once.
System.out.println (file. GetFilename()); +
}
Returns a null value.

} catch (Exception e) {}
TODO: Add catch code
e.printStackTrace ();
}
Returns a null value.
}

Why the value of the file takes the value zero, if validation is triggered. Because either way, the user will fix the error and then click the command button? This point of time, that value will be nil in the object file.
Is it possible to keep the inputFile value?

Please think!

Kind regards
Shah

Well, look more closely your still not formatted code shows you use support beanScope to store the value of the downloaded file. Problem is that after clicking on the button, the bean is killed and (now empty a new) is created. A reason to get rid of the link moer automatic usles in a bean!
You should take a look at https://blogs.oracle.com/groundside/entry/the_uimanager_pattern and store the values in a uiManager bean that you inject into the bean application scope that manage you the logic.
I used a xxyyzz bean in the scope of the application to manage the logic


private static ADFLogger _logger = ADFLogger.createADFLogger(Xxyyzz.class); 

   public String handleUpload() {
        //Here it can be any business logic validations
        if (getUiManager().getUser() != null && !getUiManager().getUser().isEmpty()) {
            //Gets the file as null if the validation of Date is being triggered once.
            String name = getUiManager().getFile().getFilename();
            _logger.info("Information" + name);
        } else {
            FacesContext.getCurrentInstance().addMessage("it1", new FacesMessage(FacesMessage.SEVERITY_ERROR, "Input is required", "Please enter data"));
        }
        return null;
    } 

    public void handleGetFile(ValueChangeEvent valueChangeEvent) {
        getUiManager().setFile((UploadedFile)valueChangeEvent.getNewValue());
    } 

    public void setUiManager(UIManager _uiManager) {
        this._uiManager = _uiManager;
    } 

    public UIManager getUiManager() {
        return _uiManager;
    }

the uiManager bean


import org.apache.myfaces.trinidad.model.UploadedFile; 

public class UIManager {
    private UploadedFile file;
    private String user;
    public UIManager() {
        super();
    } 

    public void setFile(UploadedFile file) {
        this.file = file;
    } 

    public UploadedFile getFile() {
        return file;
    } 

    public void setUser(String user) {
        this.user = user;
    } 

    public String getUser() {
        return user;
    }
}

and the code page of the user interface

The installation program of the bean in faces-config. XML



    uiManager
    de.hahn.xxyyzz.UIManager<;/managed-bean-class>
    session

the injection into the bean xxyyzz


  
    xxyyzz
    de.hahn.xxyyzz.Xxyyzz<;/managed-bean-class>
    request
    
      uiManager
      de.hahn.xxyyzz.UIManager<;/property-class>
      #{uiManager}

So your use case works as you expect.

Timo

Tags: Java

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