Download file from url using Oracle ADF & Java- Download Manager

This will work as a simple download manager, you can add file url to download it and save it.
This tutorial makes use of FileHandling and java.net.URL class in java.

• User Interface is very simple to design as it have only one input text and one button, so create a fusion web application , and a bounded taskflow with a page fragment in it
• Now drag a Input text to enter url and a button to perform action on it from Componenet palette .
• Bind input text to bean to get its value from page



 private RichInputText fileUrlBind;

    public void setFileUrlBind(RichInputText fileUrlBind) {
        this.fileUrlBind = fileUrlBind;
    }

    public RichInputText getFileUrlBind() {
        return fileUrlBind;
    }

• Now create actionListener to managed bean and write code for downloading file from given url- see code



    public void DownloadFileButton(ActionEvent actionEvent) {
        try {
            if (fileUrlBind.getValue() != null) {
                String fileUrl = fileUrlBind.getValue().toString();
                if (fileUrl.startsWith("http://")) {
                    String msgNm = fileUrl.substring(7);

                    cnctmsgBind.setValue("Connecting to " + msgNm + "....");

                    URL url = new URL(fileUrl);
                    url.openConnection();
                    InputStream reader = url.openStream();


                    FileOutputStream writer =
                        new FileOutputStream("C:/javadrive." + fileUrl.substring(fileUrl.lastIndexOf(".")));
                    byte[] buffer = new byte[153600];
                    int totalBytesRead = 0;
                    int bytesRead = 0;

                   
                    dwnldMsgBind.setValue("Reading file 150KB blocks at a time");
                    while ((bytesRead = reader.read(buffer)) > 0) {
                        writer.write(buffer, 0, bytesRead);
                        buffer = new byte[153600];
                        totalBytesRead += bytesRead;
                    }
                 
                    alerMsgBind.setValue("File is downloaded successfully, look at your c drive :-)");
                    writer.close();
                    reader.close();
                } else {
                    FacesMessage errMsg = new FacesMessage("Something went wrong");
                    errMsg.setSeverity(FacesMessage.SEVERITY_ERROR);
                    errMsg.setDetail("Example- http://www.javadrive.co.in/java.pdf");
                    FacesContext context = FacesContext.getCurrentInstance();
                    context.addMessage(fileUrlBind.getClientId(), errMsg);
                }
            }
        } catch (MalformedURLException e) {
            FacesMessage errMsg = new FacesMessage("Something went wrong");
            errMsg.setSeverity(FacesMessage.SEVERITY_ERROR);
            FacesContext context = FacesContext.getCurrentInstance();
            context.addMessage(null, errMsg);
            e.printStackTrace();
        } catch (IOException e) {
            FacesMessage errMsg = new FacesMessage("Something went wrong");
            errMsg.setSeverity(FacesMessage.SEVERITY_ERROR);
            FacesContext context = FacesContext.getCurrentInstance();
            context.addMessage(null, errMsg);
            e.printStackTrace();
        }


    }

• Now Run your application and see downloaded file in your c drive as path is hard coded in bean

•  See your downloaded file in c drive

 

•  Download Sample Application- Happy Coding Sample App

Creating new object in list (af:inputListOfValues) using 'createPopupId' feature- ADF 11g & 12c

this post is about a good feature provided with inputListOfValues in ADF .
inputListOfValues is used where large and complex data is populated in list, this component supports search in list values
Suppose on opening list values you want to add one more value in list generally to do that you will  close the list and add a value in source table then again open list but this feature provide instant creation of list values

this functionality can be achieved in Combo Box with List of Values using customActions facet, i have posted about it
http://oracleapplicationdevelopmentframework.blogspot.in/2014/03/create-new-look-up-data-using-list-of.html

so this time it is about  inputListOfValues, see the steps to do

• Created a fusion web application and business components  using Departments and Employees table of HR Schema

• now i have created list of values on DepartmentId of Employees ViewObject referenced from Department ViewObject, display type is Input Text with List of Values

•  drop Employees VO on page and run, it looks like this

• Now i have dropped a popup on page and to create new value in list, i have dropped form of Departments ViewObject and a link to create it on dialog inside popup
   
  


• select list of values component (Employee VO) in structure window and go to property inspector and set popUp id in a property called 'createPopupId'

• After setting 'createPopupId' ,on running a commandToolbarButton appears in the LOV popup dialog box with a icon, this button's action triggers custom popUp (i have added before)

        on clicking on this icon-

•  on create link i have just called createInsert for Departments ViewObject and on dialogListener , Execute



import oracle.adf.model.BindingContext;
import oracle.binding.BindingContainer;
import oracle.binding.OperationBinding;



    /**Method to get Bindings of current page
     * @return
     */
    public BindingContainer getBindings(){
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    }

    /**Method to execute OperationBinding
     * @param operation
     * @return
     */
    public OperationBinding executeOperation(String operation){
        return getBindings().getOperationBinding(operation);
    }

    /**Method to create new Department
     * @param actionEvent
     */
    public void createDeptAction(ActionEvent actionEvent) {
       executeOperation("CreateInsert").execute();
    }



• now created a new department using 'create' link and you can see value is appeared in list values

Create new look up data using List of Values (LOVs) in Oracle ADF

While working on project , i have seen such type of LOV that have a option of create Lov Value at selection time, this is quite good, as if desired value is not available in list then user can create on that time.

it means if there is no company available in list you need not to go on Company form, user can create it directly from here.
Doing this in ADF is quite simple , in this tutorial i am taking example of Oracle default HR schema (Employees and Departments) table-
Implementation Steps-

• Create business components from Department and Employees table 





•  Now create LOV on DepartmentId of employees ViewObject from Department VO

• Go to UI Hints tab of LOV and select Combo Box with List of Values

•  Now drag fields of Employee from DataControl to page as form

•  Select Department Id Lov and go to structure window, and drop a link in customActions facet of  af:inputComboboxListOfValues

• Now drag a popup on page and drag Department VO on af:dialog as form to create new department. and other things are same as normal form
  

• Bind this popup to bean and create a ActionListener on the link inside facet to invoke createInsert of department table



package lookup.view.bean;

import java.io.Serializable;

import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;

import oracle.adf.model.BindingContext;

import oracle.adf.view.rich.component.rich.RichPopup;

import oracle.adf.view.rich.event.DialogEvent;

import oracle.binding.BindingContainer;
import oracle.binding.OperationBinding;

import org.apache.myfaces.trinidad.render.ExtendedRenderKitService;
import org.apache.myfaces.trinidad.util.Service;

public class LookupDataBean implements Serializable {
    private RichPopup deptPopUpBind;

    public LookupDataBean() {
    }

    public BindingContainer getBindings() {
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    }

    private void showPopup(RichPopup pop, boolean visible) {
        try {
            FacesContext context = FacesContext.getCurrentInstance();
            if (context != null && pop != null) {
                String popupId = pop.getClientId(context);
                if (popupId != null) {
                    StringBuilder script = new StringBuilder();
                    script.append("var popup = AdfPage.PAGE.findComponent('").append(popupId).append("'); ");
                    if (visible) {
                        script.append("if (!popup.isPopupVisible()) { ").append("popup.show();}");
                    } else {
                        script.append("if (popup.isPopupVisible()) { ").append("popup.hide();}");
                    }
                    ExtendedRenderKitService erks =
                        Service.getService(context.getRenderKit(), ExtendedRenderKitService.class);
                    erks.addScript(context, script.toString());
                }
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public void createDept(ActionEvent actionEvent) {
        BindingContainer bindings = getBindings();
        OperationBinding ob = bindings.getOperationBinding("CreateInsert");
        ob.execute();
        showPopup(deptPopUpBind, true);
    }

    public void DeptDialogListener(DialogEvent dialogEvent) {
        FacesContext fct = FacesContext.getCurrentInstance();
        if (dialogEvent.getOutcome().name().equals("ok")) {
            BindingContainer bindings = getBindings();
            OperationBinding ob = bindings.getOperationBinding("Commit");
            ob.execute();

        }
    }

    public void setDeptPopUpBind(RichPopup deptPopUpBind) {
        this.deptPopUpBind = deptPopUpBind;
    }

    public RichPopup getDeptPopUpBind() {
        return deptPopUpBind;
    }
}



• Now run this application and click on Lov of DepartmentId, you will see your link there to create Department

• Now see that how many departments are listed currently in LOV

• Now click on Add Department link and add a department

•  Again see the listed departments- Oracle ADF Tutorial is added in now list

 this is how you can use this beautiful feature in your LOV-

Disabling keyboard input in af:inputDate, restrict user to use calendar only - Oracle ADF

This tutorial is about a requirement of restricting user to enter date through calendar only in ADF application
this trick was posted by Frank Nimphius (ADF Code Corner)

• Drop a af:inputDate component on page from component pallete








• Now set its background color so that it looks like disabled field

• Now to make it's input field disable, we have to write a small javascript function, copy this function and paste in your page source (XML)



<af:resource type="javascript">
          function enableCalendarOnly(evt) {
              evt.cancel();
          }
        </af:resource>



• Now drop a af:clientListener under af:inputDate component to invoke javascript

• Now set properties in af:clientListener as Method & Type

 Now run your page and see that input field is disabled for date component , now value can be selected using calendar only

Apply Filter on af:table column programmatically ,Invoke 'FilterableQueryDescriptor' through managed bean

this tutorial is about a requirement of filtering af:table column through code,
to achieve this we can invoke FilterableQueryDescriptor (FilterableQueryDescriptor is an abstract subclass of QueryDescriptor. It adds support for filtering of data and is typically used by the table component to filter data from a query )

Suppose i have department table and i have to filter on department column-

• Create a Fusion Web Application and business components for Departments (HR Schema) table
• now drag table on page and bind it to bean

• Now drop a input text and button on page to enter Department Name
• bind input text to bean and create ActionListener on button to filter Department Table

See XML source of Page-

<?xml version='1.0' encoding='UTF-8'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1" xmlns:f="http://java.sun.com/jsf/core"
          xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
    <jsp:directive.page contentType="text/html;charset=UTF-8"/>
    <f:view>
        <af:document title="filterPage.jspx" id="d1">
            <af:messages id="m1"/>
            <af:form id="f1">
                <af:inputText label="Department Name" id="it5"
                              binding="#{pageFlowScope.FilterProgrammaticBean.deptNmBind}"/>
                <af:commandButton text="Filter" id="cb1"
                                  actionListener="#{pageFlowScope.FilterProgrammaticBean.filterTableAction}"/>
                <af:table value="#{bindings.DepartmentsView1.collectionModel}" var="row"
                          rows="#{bindings.DepartmentsView1.rangeSize}"
                          emptyText="#{bindings.DepartmentsView1.viewable ? 'No data to display.' : 'Access Denied.'}"
                          fetchSize="#{bindings.DepartmentsView1.rangeSize}" rowBandingInterval="1"
                          selectedRowKeys="#{bindings.DepartmentsView1.collectionModel.selectedRow}"
                          selectionListener="#{bindings.DepartmentsView1.collectionModel.makeCurrent}"
                          rowSelection="single" id="t1" styleClass="AFStretchWidth"
                          binding="#{pageFlowScope.FilterProgrammaticBean.deptTabBind}"
                          filterModel="#{bindings.DepartmentsView1Query.queryDescriptor}"
                          queryListener="#{bindings.DepartmentsView1Query.processQuery}" filterVisible="true"
                          varStatus="vs">
                    <af:column sortProperty="#{bindings.DepartmentsView1.hints.DepartmentId.name}" sortable="true"
                               headerText="#{bindings.DepartmentsView1.hints.DepartmentId.label}" id="c1"
                               filterable="true">
                        <af:inputText value="#{row.bindings.DepartmentId.inputValue}"
                                      label="#{bindings.DepartmentsView1.hints.DepartmentId.label}"
                                      required="#{bindings.DepartmentsView1.hints.DepartmentId.mandatory}"
                                      columns="#{bindings.DepartmentsView1.hints.DepartmentId.displayWidth}"
                                      maximumLength="#{bindings.DepartmentsView1.hints.DepartmentId.precision}"
                                      shortDesc="#{bindings.DepartmentsView1.hints.DepartmentId.tooltip}" id="it1"
                                      readOnly="true">
                            <f:validator binding="#{row.bindings.DepartmentId.validator}"/>
                            <af:convertNumber groupingUsed="false"
                                              pattern="#{bindings.DepartmentsView1.hints.DepartmentId.format}"/>
                        </af:inputText>
                    </af:column>
                    <af:column sortProperty="#{bindings.DepartmentsView1.hints.DepartmentName.name}" sortable="true"
                               headerText="#{bindings.DepartmentsView1.hints.DepartmentName.label}" id="c2"
                               filterable="true">
                        <af:inputText value="#{row.bindings.DepartmentName.inputValue}"
                                      label="#{bindings.DepartmentsView1.hints.DepartmentName.label}"
                                      required="#{bindings.DepartmentsView1.hints.DepartmentName.mandatory}"
                                      columns="#{bindings.DepartmentsView1.hints.DepartmentName.displayWidth}"
                                      maximumLength="#{bindings.DepartmentsView1.hints.DepartmentName.precision}"
                                      shortDesc="#{bindings.DepartmentsView1.hints.DepartmentName.tooltip}" id="it2"
                                      readOnly="true">
                            <f:validator binding="#{row.bindings.DepartmentName.validator}"/>
                        </af:inputText>
                    </af:column>
                    <af:column sortProperty="#{bindings.DepartmentsView1.hints.ManagerId.name}" sortable="true"
                               headerText="#{bindings.DepartmentsView1.hints.ManagerId.label}" id="c3"
                               filterable="true">
                        <af:inputText value="#{row.bindings.ManagerId.inputValue}"
                                      label="#{bindings.DepartmentsView1.hints.ManagerId.label}"
                                      required="#{bindings.DepartmentsView1.hints.ManagerId.mandatory}"
                                      columns="#{bindings.DepartmentsView1.hints.ManagerId.displayWidth}"
                                      maximumLength="#{bindings.DepartmentsView1.hints.ManagerId.precision}"
                                      shortDesc="#{bindings.DepartmentsView1.hints.ManagerId.tooltip}" id="it3"
                                      readOnly="true">
                            <f:validator binding="#{row.bindings.ManagerId.validator}"/>
                            <af:convertNumber groupingUsed="false"
                                              pattern="#{bindings.DepartmentsView1.hints.ManagerId.format}"/>
                        </af:inputText>
                    </af:column>
                    <af:column sortProperty="#{bindings.DepartmentsView1.hints.LocationId.name}" sortable="true"
                               headerText="#{bindings.DepartmentsView1.hints.LocationId.label}" id="c4"
                               filterable="true">
                        <af:inputText value="#{row.bindings.LocationId.inputValue}"
                                      label="#{bindings.DepartmentsView1.hints.LocationId.label}"
                                      required="#{bindings.DepartmentsView1.hints.LocationId.mandatory}"
                                      columns="#{bindings.DepartmentsView1.hints.LocationId.displayWidth}"
                                      maximumLength="#{bindings.DepartmentsView1.hints.LocationId.precision}"
                                      shortDesc="#{bindings.DepartmentsView1.hints.LocationId.tooltip}" id="it4"
                                      readOnly="true">
                            <f:validator binding="#{row.bindings.LocationId.validator}"/>
                            <af:convertNumber groupingUsed="false"
                                              pattern="#{bindings.DepartmentsView1.hints.LocationId.format}"/>
                        </af:inputText>
                    </af:column>
                </af:table>
            </af:form>
        </af:document>
    </f:view>
</jsp:root>

Managed Bean Code-

package filter.view;

import java.util.Map;

import javax.faces.event.ActionEvent;

import oracle.adf.view.rich.component.rich.data.RichTable;
import oracle.adf.view.rich.component.rich.input.RichInputText;
import oracle.adf.view.rich.context.AdfFacesContext;
import oracle.adf.view.rich.event.QueryEvent;
import oracle.adf.view.rich.model.FilterableQueryDescriptor;


public class FilterProgrammaticBean {
    private RichInputText deptNmBind;
    private RichTable deptTabBind;

    public FilterProgrammaticBean() {
    }

    public void setDeptNmBind(RichInputText deptNmBind) {
        this.deptNmBind = deptNmBind;
    }

    public RichInputText getDeptNmBind() {
        return deptNmBind;
    }

    public void setDeptTabBind(RichTable deptTabBind) {
        this.deptTabBind = deptTabBind;
    }

    public RichTable getDeptTabBind() {
        return deptTabBind;
    }

    /**Method to invoke FilterableQueryDescriptor and Filter Department table
     * @param actionEvent
     */
    public void filterTableAction(ActionEvent actionEvent) {
        RichTable tbl = this.getDeptTabBind();
        FilterableQueryDescriptor filterQD = (FilterableQueryDescriptor)tbl.getFilterModel();
        Map filterCriteria = filterQD.getFilterCriteria();
        filterCriteria.put("DepartmentName", deptNmBind.getValue());
        getDeptTabBind().queueEvent(new QueryEvent(getDeptTabBind(), filterQD));
        AdfFacesContext.getCurrentInstance().addPartialTarget(this.getDeptTabBind());
    }
}

Run your Application-

Clear Selected Values of shuttle component (Reset shuttle) programmatically-Oracle ADF

Sometimes we need to reset shuttle (clear selected values) through our code (managed bean)
so in this post I'm going to explain how to do this with simple piece of code

• I have created a simple jspx page and placed Departments (HR Schema) view-object on this page as an af:selectManyShuttle
  
• Created managed bean for a link to clear selected indices of shuttle, see code -



    public BindingContainer getBindings() {
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    }

    /**Method to Clear selected value of shuttle (Reset Shuttle)
     * @param actionEvent
     */
    public void resetShuttleAction(ActionEvent actionEvent) {
        BindingContainer bc = this.getBindings();
        JUCtrlListBinding listBindings = (JUCtrlListBinding)bc.get("DepartmentsView1");
        listBindings.clearSelectedIndices();

    }



• Now see how it works- when user click on this link ,it will clear all selected indices of shuttle

Checking Transaction Status of DataControl for Dirty/Modified transaction in ADF

Sometimes we need to check status of data control's transaction, when we have any form or table on page ,initially transaction is not dirty (it means there is no pending changes in binding layer)
if user changes any data set on page that is populated from ADF binding layer, status of transaction is modified as now there is pending changes on page .

When user perform commit or rollback operation then again transaction status changes.

So it is necessary to have basic understanding of Transaction Status and using this we can write some better piece of codes.
Example- suppose we have a save button in our Application that performs commit operation, when user clicks on that button, every time commit gets executed but logically if there is no change in binding layer then commit must not be executed.
So we can check transaction status on this button and if there is any pending changes in ADFm binding layer or transaction is dirty only then commit will be executed

• I have created a sample application to check this , there is departments and location ViewObjects are on page and a button to check transaction status
• Code to check transaction status-



public BindingContainer getBindings(){
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    }

DCBindingContainer dcbind =(DCBindingContainer)getBindings();
dcbind.getDataControl().isTransactionModified()


OR


amObject.getDBTransaction().isDirty()



• Initially see page status there is no pending changes so transaction is not dirty

• Now i have changed DepartmentName attribute , then clicked on Check Transaction button

 

• Now when data is committed again status got changed

Using Multiple Selection (selectManyListbox & selectManyCheckbox component) in ADF

This tutorial is based on use of selectManyListbox & selectManyCheckbox component in ADF to enable multiple selection.
Both component are same in functionality only somewhat different in look-feel.




Follow steps to use these component -

• Create a fusion web application and create business components for Departments table of HR Schema

• Now create a page and drop Departments Vo from data control on page as multiple selection (checkbox or listbox) 

• Now binding for this component is created in page-bindings, add a button on page to get total selected values
  
  
  
  
  
  

• See how to get selected values in managed bean, JUCtrlListBinding is used to get selected values



import javax.faces.event.ActionEvent;

import oracle.adf.model.BindingContext;

import oracle.binding.BindingContainer;

import oracle.jbo.uicli.binding.JUCtrlListBinding;   

 public BindingContainer getBindings() {
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    }

    public void getSelectedValue(ActionEvent actionEvent) {

        JUCtrlListBinding listBindings = (JUCtrlListBinding)getBindings().get("DepartmentsView1");
        Object str[] = listBindings.getSelectedValues();
        for (int i = 0; i < str.length; i++) {
            System.out.println(str[i]);
        }
    }



• this method works for both listbox and checkbox, i have added all selected departments in a FacesMessage and displayed on page

 Select All-

 

And Check-box component look like this-

Complete code written on 'Get Selected Values' button-

    /**Method to get BindingContainer of page
     * @return
     */
    public BindingContainer getBindings() {
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    }

    /**Method to get Selected Values
     * @param actionEvent
     */
    public void getSelectedValue(ActionEvent actionEvent) {

        JUCtrlListBinding listBindings = (JUCtrlListBinding)getBindings().get("DepartmentsView1");
        Object str[] = listBindings.getSelectedValues();
        StringBuilder saveMsg =
            new StringBuilder("<html><body><b><p style='color:red'>Selected Departments are-</p></b>");

        saveMsg.append("<ul>");
        for (int i = 0; i < str.length; i++) {
            System.out.println(str[i]);
            saveMsg.append("<li> <b>" + str[i].toString() + "</b></li>");
        }

        saveMsg.append("</ul><br>");
        saveMsg.append("</body></html>");
        FacesMessage msg = new FacesMessage(saveMsg.toString());
        FacesContext.getCurrentInstance().addMessage(null, msg);

    }