Ashish Awasthi's Blog

Wednesday, 4 June 2014

ADF Basics : Implementing auto suggest behavior in ADF Faces lov (list of values)

Auto Suggest behavior is best understand by Google Instant, as in google when we type something and it starts showing suggestion instantly.

This effect can be implemented in ADF using autoSuggestBehaviour
To use the auto-suggest functionality in a declarative way you need to define a model-driven list of values on your model project, which will be the base for the suggestedItems list. Select the Department Name attribute from the Department VO and create a List of Values. here i am using HR schema and predefined table Department to implement this

Create a Fusion Web Application
Now create EO and VO of Department table.(Business Components)

Now create List of values(LOVs)on DepartmentName

Create page in ViewController and drag the DepartmentName on page as ADF Lov ChoiceList or Lov Input

Now go to Component Palette and select Auto Suggest Behaviour and drop it inside DepartmentName Lov

Now select af:autoSuggestBehavior from Page structure and go to PropertyInspector and Open Expression Builder at SuggestedItems and select from bindings #{bindings.DepartmentName.suggestedItems} if you are using different tables and Lov select according to that

Now run your page and enjoy autosuggest behavior (ADF Instant)

Cheers :-) Happy Learning

Read Next Post in Series- Implement contains/endswith behavior in model based autoSuggest Lov (Input list and combo box)

Tuesday, 27 May 2014

ADF Basics : How to use FacesMessage to show multiline message

FacesMessage component is used to show confirmation, warning or informational message in Oracle ADF .In this tutorial, you will see that how to use FacesMessage component to show Multiline Message. Sometimes we need to show multilines message then how we implement this ?

this is same as FacesMessage implementation, you should know that af:messages support HTML formatting, so we use HTML formatting to show multiline messages
see more about FacesMessage -

http://www.awasthiashish.com/2012/10/show-facesmessage-in-oracle-adf.html
about inline message
http://www.awasthiashish.com/2012/10/show-inline-message-in-oracle-adf.html

Managed bean code to show multiline message in ADF using FacesMessage-

    package multilineMessages.view.bean;
     
    import javax.faces.application.FacesMessage;
    import javax.faces.context.FacesContext;
    import javax.faces.event.ActionEvent;
     
    public class MultilineMessageBean {
        public MultilineMessageBean() {
        }
     
        public void showMessage(ActionEvent actionEvent) {
            StringBuilder message = new StringBuilder("<html><body>");
            message.append("<p><b>Hi This is Frist Line--Oracle ADF Message</b></p>");
            message.append("<p><i>Hi This is Second Line--Oracle ADF Message</i></p>");
            message.append("<p><b>Hi This is Third Line--Oracle ADF Message</b></p>");
            message.append("</body></html>");
            FacesMessage fm = new FacesMessage(message.toString());
            fm.setSeverity(FacesMessage.SEVERITY_INFO);
            FacesContext fctx = FacesContext.getCurrentInstance();
            fctx.addMessage(null, fm);
        }
    }

To use for Error and Warning just change FacesMessage.SEVERITY_INFO to SEVERITY_ERROR or SEVERITY_WARN.
It will look like this
You can change your Message accordingly

you can also use some html styles (CSS) to change color of text that appears in message body , see the changed code

    public void showMessage(ActionEvent actionEvent) {
        StringBuilder message = new StringBuilder("<html><body>");
        message.append("<p style='color:navy'><b>Hi This is Frist Line--Oracle ADF Message</b></p>");
        message.append("<p style='color:green'><i>Hi This is Second Line--Oracle ADF Message</i></p>");
        message.append("<p style='color:magenta'><b>Hi This is Third Line--Oracle ADF Message</b></p>");
        message.append("<p style='color:red'><b><i>This is Fourth line--Oracle ADF Message</i></b></p>");
        message.append("</body></html>");
        FacesMessage fm = new FacesMessage(message.toString());
        fm.setSeverity(FacesMessage.SEVERITY_INFO);
        FacesContext fctx = FacesContext.getCurrentInstance();
        fctx.addMessage(null, fm);
    }

now see the FacesMessage look like this-

Happy Learning :-) Download Sample App

Friday, 23 May 2014

Reading html source of a webpage (url) using Oracle ADF (af:richTextEditor) & Java

This post is about a common question asked in java-

How to read page source of a website ? or how to get html source of an url?

so for that there is a simple piece of code to read html source of a webpage using it's url, and i have added af:richTextEditor (ADF Faces component for ricj text formatting) to show html form of url source

I have a page with one input text to capture url entered by user, a button to fetch html source of that webpage and a af:richTextEditor to show source code in editing mode and in html mode

See how to get webpage source from an url using java and save it to a html file (download a webpage ), Bind inputText and richInputText to managed bean and craete a actionListener on button to get source

    // Input text Binding to get URL
    private RichInputText webPageUrlBind;
    // RickInput text Binding to set Source
    private RichTextEditor richTextBind;
    public void setWebPageUrlBind(RichInputText webPageUrlBind) {
        this.webPageUrlBind = webPageUrlBind;
    }

    public RichInputText getWebPageUrlBind() {
        return webPageUrlBind;
    }

    public void setRichTextBind(RichTextEditor richTextBind) {
        this.richTextBind = richTextBind;
    }

    public RichTextEditor getRichTextBind() {
        return richTextBind;
    }
    /**Method to get html source of url (webpage) and set this to rickTextEditor
     * @param actionEvent
     */
    public void getSourceCodeAction(ActionEvent actionEvent) {
        URL url = null;

        try {
            if (webPageUrlBind.getValue() != null) {
                // Define your URL- Get value from input text using binding
                url = new URL(webPageUrlBind.getValue().toString());
            }
            URLConnection conn = url.openConnection();

            // open the stream and put it into BufferedReader
            BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));

            String inputLine;
            String sourceCode = "";

            //Save html file (HTML Source Code of given URL)
            String fileName = "D:/web-content.html";
            File file = new File(fileName);

            if (!file.exists()) {
                file.createNewFile();
            }

            //use FileWriter to write file
            FileWriter fw = new FileWriter(file.getAbsoluteFile());
            BufferedWriter bw = new BufferedWriter(fw);
            System.out.println("Printing WebPage source on console, Please wait...\n");
            while ((inputLine = br.readLine()) != null) {
                System.out.println(inputLine);
                bw.write(inputLine);
                sourceCode = sourceCode.concat(inputLine);
            }

            bw.close();
            br.close();
            richTextBind.setValue(sourceCode);
            AdfFacesContext.getCurrentInstance().addPartialTarget(richTextBind);
            System.out.println("\n\nYour file is save in D drive! Congratulations ");

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

now click on button and see , here i am getting source code of this blog http://oracleadf-java.blogspot.in/

now switch RichTextMode to see html preview of this source, it is exactly looking like live webpage, it shows one can practice in this ADF Faces's rickTextEditor to learn html tags

and see in D drive of your system a file named web-content created , it contains whole source of this webpage

Cheers - Happy Learning :)

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