Exporting viewObject data in text file using af:fileDownloadActionListener in Oracle ADF (12.1.3)

Hello All
This post is about using af:fileDownloadActionListener to generate file on run-time, suppose i have a viewObject and i want to export it's data in CSV or plain text so for this requirement we can generate file at run-time and send it to client UI to download

What is af:fileDownloadActionListener-
as per oracle docs-
The fileDownloadActionListener tag is a declarative way to allow an action source (<commandButton>, <commandLink>, etc.) to programatically send the contents of a file to the user, optionally with a specific content type and filename. Since file downloads must be processed with an ordinary request - not XMLHttp AJAX requests - this tag forces partialSubmit to be false on the parent component, if it supports that attribute.
The fileDownloadActionListener uses the native (browser built-in) filedownload popup, so this popup cannot be configured.

In this post i am using Departments table of HR schema

• Prepare model part using Departments table and drop it on page as a table and add a button to UI for downloading





• drop af:fileDownloadActionListener as child of button and set it's property as contentType, method , fileName 





• Now see code written in download Listener-



    /**Method to get BindingsContainer for current page
     * @return
     */
    public BindingContainer getBindingsCont() {
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    }

    /**Method to download ViewObject's data in plain text file
     * @param facesContext
     * @param outputStream
     * @throws UnsupportedEncodingException
     * @throws IOException
     */
    public void fileDownloadListener(FacesContext facesContext,
                                     OutputStream outputStream) throws UnsupportedEncodingException, IOException {
        OutputStreamWriter w = new OutputStreamWriter(outputStream, "UTF-8");
        //Get itertaor from bindings
        DCIteratorBinding deptIter = (DCIteratorBinding) getBindingsCont().get("Departments1Iterator");
        //Get ViewObject from Iterator
        ViewObjectImpl vo = (ViewObjectImpl) deptIter.getViewObject();
        ViewAttributeDefImpl[] attrDefs = vo.getViewAttributeDefImpls();
        int count = 0;
        RowSetIterator rsi = vo.createRowSetIterator(null);
        while (rsi.hasNext()) {
            Row nextRow = rsi.next();
            if (nextRow != null) {
                // Code to iterate over ViewObject's column to get all columns value at runtime
                for (ViewAttributeDefImpl attrDef : attrDefs) {
                    byte attrKind =
                        attrDefs[count].getAttributeKind(); //checks attribute kind for each element in an array of AttributeDefs
                    if (attrKind != AttributeDef.ATTR_ASSOCIATED_ROW &&
                        attrKind != AttributeDef.ATTR_ASSOCIATED_ROWITERATOR) {
                        String columnName = attrDef.getName();
                        w.write(columnName + " - " + nextRow.getAttribute(columnName) + "  ");
                    }
                }
                // Code to create new line text line for new Row
                w.write(System.getProperty("line.separator"));
            }
        }
        //Flush the writer after wrting file
        w.flush();
    }
}



• Run this application and click on download button, browser download box appears , open downloaded file and see how your data appears in text file, to export data in a pdf file you have to generate PDF file using some API then you can download it in same way

Cheers:) Happy Learning

Showing highlighted holiday calendar in af:inputDate date picker (ADF 12.1.3)

Hello All
This post is about showing highlighted days for holidays in af:inputDate and user must not be able to select these dates
here i am using Jdeveloper 12.1.3
you can do this using af:calendar
https://blogs.oracle.com/adf/entry/display_holiday_name_in_af
but i have a requirement to show holidays while user selects date using af:inputDate

so for this requirement first step is easy to do and there is lots of post about disabling specific days in calendar of af:inputDate

Step 1. Disable specific days -

• you can see there is property in af:inputDate for setting disabled days, this filed takes a value of type List supported by DateListProvider interface







• for this purpose i have created a bean that implements methods of DateListProvider , in Overridden method i have defined a list that contains dates of holidays that i want to disable in af:inputDate



package holiday.view.bean;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

import javax.faces.context.FacesContext;

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

public class HolidayBean implements DateListProvider {
    public HolidayBean() {
    }

    @Override
    public List<Date> getDateList(FacesContext facesContext, Calendar calendar, Date date, Date date2) {
        List<java.util.Date> holiDay = new ArrayList();
        holiDay.add(new Date("27-July-2014"));
        holiDay.add(new Date("29-July-2014"));
        holiDay.add(new Date("10-Aug-2014"));
        holiDay.add(new Date("25-Dec-2014"));
        holiDay.add(new Date("01-Jan-2015"));
        holiDay.add(new Date("22-Oct-2014"));
        holiDay.add(new Date("23-Oct-2014"));
        holiDay.add(new Date("24-Oct-2014"));

        return holiDay;
        //return Collections.emptyList();
    }
}



• attached this bean to disabledDays property of af:inputDate





• now first part is done we can see all holidays as disabled in calendar of af:inputDate

Step 2. Highlight disabled holidays -

• but it is not easy to find holidays as all are in grey, so i have to highlight all disabled days , so for this requirement , create a skin in viewController project and write this



af|chooseDate::regular-day:disabled{
    background-color: red;
    color: ButtonFace;
}



• af:chooseDate is used because internally af:inputDate opens af:chooseDate as date picker so i have to change property of af:chooseDate, now run your application

Happy Learning :)

Search on (Filtering) child nodes of af:treeTable using viewCriteria in Oracle ADF (11g,12c)

Hello all
this post is about filtering treeTable on basis of child nodes in Oracle ADF
in this tutorial i have used Departments and Employees table of HR schema to create treeTable
see how to create treeTable-
http://www.awasthiashish.com/2012/11/tree-table-component-in-oracle.html
http://www.awasthiashish.com/2013/08/tree-table-component-with-declarative.html

treeTable look like this-

now next is to search on Employee Names

• i have dropped a input text for search string and a button to search on page , here i am searching on first name of employees 





• now created a view Criteria in Employee viewObject to search on first name





• This viewCriteria doesn't work directly on Employee viewObject, to search in treeTable we have to override createViewLinkAccessorRS method in Departments (master vo) VOImpl class, and in this method we have to call Employees ViewCriteria explicitly , this will filter Employee Vo Rowset as per bind-variable value when a node is disclosed at runtime



    /**
     * @param associationDefImpl
     * @param viewObjectImpl
     * @param row
     * @param object
     * @return
     */
    protected ViewRowSetImpl createViewLinkAccessorRS(AssociationDefImpl associationDefImpl,
                                                      ViewObjectImpl viewObjectImpl, Row row, Object[] object) {


        ViewRowSetImpl viewRowSetImpl = super.createViewLinkAccessorRS(associationDefImpl, viewObjectImpl, row, object);

        String firstName = getFirstNm();
        ViewCriteriaManager vcm = viewObjectImpl.getViewCriteriaManager();
        ViewCriteria vc = vcm.getViewCriteria("EmployeesVOCriteria");
        VariableValueManager vvm = vc.ensureVariableManager();
        vvm.setVariableValue("BindFirstNm", firstName);
        viewObjectImpl.applyViewCriteria(vc);
        return viewRowSetImpl;


        // return super.createViewLinkAccessorRS(associationDefImpl, viewObjectImpl, row, object);
    }



• to pass bind-variable value i have created a variable and it's accessors in VoImpl and exposed set method to client that is further used by managed bean



    private String firstNm;
    public void setFirstNm(String firstNm) {
        this.firstNm = firstNm;
    }

    public String getFirstNm() {
        return firstNm;
    }



• now this setter method is called in managed bean search button action to set bind variable value



    /**Method to search in treeTable childs
     * @param actionEvent
     */
    public void searchAction(ActionEvent actionEvent) {
        if (firstNmBind.getValue() != null) {
            OperationBinding ob = executeOperation("setFirstNm");
            // firstNmBind is binding of inputText
            ob.getParamsMap().put("firstNm", firstNmBind.getValue().toString());
            ob.execute();
            /* Method Expand treeTable after Search see- 
             http://www.awasthiashish.com/2013/10/expand-and-collapse-aftreetable.html*/
            expandTreeTable();
            AdfFacesContext.getCurrentInstance().addPartialTarget(treeTabBind);

        }
    }



• Run your application and see-
  
  Cheers- Happy Learning
  Download Sample ADF Application