Allow user input in Jdeveloper for Java applications, Using Java Scanner Class to take input from console

Sometimes we have to take input from Keyboard when we use Scanner or BufferedReader class.
and to take input from Jdeveloper we have to change a setting to allow user input in Jdeveloper.

Let's take an example of java.util.Scanner class-

package client;

import java.util.Scanner;

public class UserInput {
    public UserInput() {
        super();
    }

    public static void main(String[] args) {
        System.out.println("Please Enter your Name-");
        Scanner sc = new Scanner(System.in);
        String name = sc.next();
        System.out.println("Your Name is " + name);
    }

}

Better UI for data collection using af:listView, Enable selection in ADF Faces List component

af:listView is a new component introduced in Jdev 12C to show tabular data (rows of a collection), it uses same configuration as af:table
In this post i will be describing- how to create af:listView using ADF business component and  how we can enable selection in af:listView

Let's start
How to create af:listView using ADF BC-

• Created a Fusion Web Application and prepared model using Departments table of HR Schema




drop Departments viewObject on page from DataControl as ADF List View






Configuration Wizard for List is opened, set the appropriate layout




Set the value binding that we want to show on page




After this we can customize layout on page also, we can change color, style width etc;
see XML source of af:listView-



<af:listView value="#{bindings.Departments1.collectionModel}" var="item"
                             emptyText="#{bindings.Departments1.viewable ? 'No data to display.' : 'Access Denied.'}"
                             fetchSize="#{bindings.Departments1.rangeSize}" id="lv1">
                    <af:listItem id="li1">
                        <af:panelGroupLayout layout="horizontal" id="pgl1">
                            <f:facet name="separator">
                                <af:spacer width="10" id="s1"/>
                            </f:facet>
                            <af:outputFormatted value="#{item.bindings.DepartmentId.inputValue}" id="of1"
                                                inlineStyle="font-weight:bold;font-size:medium;color:red;">
                                <af:convertNumber groupingUsed="false"
                                                  pattern="#{bindings.Departments1.hints.DepartmentId.format}"/>
                            </af:outputFormatted>
                            <af:outputFormatted value="#{item.bindings.DepartmentName.inputValue}" id="of2"
                                                inlineStyle="font-weight:bold;font-size:small;color:navy;"/>
                        </af:panelGroupLayout>
                        <af:panelGroupLayout id="pgl2">
                            <af:outputLabel value="Manager id" id="ol1"/>
                            <af:outputFormatted value="#{item.bindings.ManagerId.inputValue}" id="of3">
                                <af:convertNumber groupingUsed="false"
                                                  pattern="#{bindings.Departments1.hints.ManagerId.format}"/>
                            </af:outputFormatted>
                            <af:spacer width="10" height="10" id="s2"/>
                            <af:outputLabel value="Location Id" id="ol2"/>
                            <af:outputFormatted value="#{item.bindings.LocationId.inputValue}" id="of4">
                                <af:convertNumber groupingUsed="false"
                                                  pattern="#{bindings.Departments1.hints.LocationId.format}"/>
                            </af:outputFormatted>
                        </af:panelGroupLayout>
                    </af:listItem>
                </af:listView>



and how it looks on page- hmmm better than af:table





• By default adf listView doesn't support selection, you can see Selection property is set to none. it shares same configuration as af:table , you can see that value property is bound to #{bindings.Departments1.collectionModel} and attributes are populated using variable reference of this collection





• To enable selection just set Selection to single and in selectionListener property of list set #{bindings.Departments1.treeModel.makeCurrent}







• Now Run this application and check, single selection is enabled

 Thanks, happy learning :)

Using HashMap in EL expression to set component properties in Oracle ADF

Basic requirement while using EL on pages in ADF, we use bean variables, binding attributes, iterators in expression to check conditions , to set properties for components as Enable-Disable, Visible, inline style etc.
in the same way we can use collections (Array, HashMap) in expression, i know it is pretty simple but have seen many thread in OTN asking how to use HashMap in expression

So here i am taking a very simple example



I have 5 input text on page and i have to enable-disable some fields based on it's id value, there is two buttons on page

as you can see on click of first button , input field 1,3 and 5 should be disabled and on click of second button af:inputText 2 and 4 should be disabled
so for this purpose i have used a HashMap in managed bean

    private HashMap fieldVal = new HashMap();

    public void setFieldVal(HashMap fieldVal) {
        this.fieldVal = fieldVal;
    }

    public HashMap getFieldVal() {
        return fieldVal;
    }

values in HashMap are populated using id value of inputTexts on page as key, this id will be passed as parameter in HashMap in expression
see how expression used in disabled property of inputText-

in same way expression for all inputText is set

<af:panelFormLayout id="pfl1" partialTriggers="b1 b2">
                    <af:inputText label="Label 1" id="it1" disabled="#{EnableDisableBean.fieldVal['it1']}"/>
                    <af:inputText label="Label 2" id="it2"
                                  disabled="#{requestScope.EnableDisableBean.fieldVal['it2']}"/>
                    <af:inputText label="Label 3" id="it3"
                                  disabled="#{requestScope.EnableDisableBean.fieldVal['it3']}"/>
                    <af:inputText label="Label 4" id="it4"
                                  disabled="#{requestScope.EnableDisableBean.fieldVal['it4']}"/>
                    <af:inputText label="Label 5" id="it5" autoSubmit="true"
                                  disabled="#{requestScope.EnableDisableBean.fieldVal['it5']}"/>
                </af:panelFormLayout>

now see code on buttons, simply setting values against key

    /**Method to disable inputText (1,3,5) on basis of id value
     * @param actionEvent
     */
    public void disable135Action(ActionEvent actionEvent) {
        fieldVal.put("it1", true);
        fieldVal.put("it2", false);
        fieldVal.put("it3", true);
        fieldVal.put("it4", false);
        fieldVal.put("it5", true);

    }

    /**Method to disable inputText (2,4) on basis of id value
     * @param actionEvent
     */
    public void disable24Action(ActionEvent actionEvent) {
        fieldVal.put("it1", false);
        fieldVal.put("it2", true);
        fieldVal.put("it3", false);
        fieldVal.put("it4", true);
        fieldVal.put("it5", false);
    }

Run Application and see what is on page
On Click of First Button

On Click of Second Button

Thanks
Happy learning :)

Dynamically enable or disable items of ADF bound List (af:selectOneChoice) -Oracle ADF

Hello All,
This tutorial is about a requirement of conditionally enabling/disabling items (values) of adf bound List (af:selectOneChoice) component
here i am taking reference of default HR Schema (Departments and Location table )

See the steps-

• Create a Fusion Web Application and business components using both tables

•  Now create List of Values (Lov) on locationId of departments VO from Location VO

• Set List Attribute to LocationId and for UI city will be shown

• Now Drag Departments VO from Data Control on page as a form

•  Select LocationId list field and delete f:selectItems from it, now drag af:selectItem as child of af:selectOneChoice and surround it with af:forEach 

• Add tree binding of Location ViewObject to page bindings in order to populate list items using forEach

•  Now select af:forEach and set its property and variable name, as we have to iterate through Location VO for list items

•  Again select af:selectItem and set its value and label property using forEach variable's  

• Now run your application, and see that list box is ready with values

• Now we have to disable its values as a condition basis, i have written an Expression on af:selectItem's disabled property
  
  
  
  


• I have written condition for DepartmentId 100 and 110, see in source of page



<af:selectOneChoice value="#{bindings.LocationId.inputValue}" label="#{bindings.LocationId.label}"
                                        required="#{bindings.LocationId.hints.mandatory}"
                                        shortDesc="#{bindings.LocationId.hints.tooltip}" id="soc1"
                                        contentStyle="width:150px;color:red;">
                        <af:forEach items="#{bindings.Locations1.rangeSet}" var="list">
                            <af:selectItem label="#{list.City}" id="si1" value="#{list.LocationId}"
                                           disabled="#{ (bindings.DepartmentId.inputValue==100 and (list.LocationId==1000 || list.LocationId==1300)) || (bindings.DepartmentId.inputValue==110 and (list.LocationId==1500 || list.LocationId==1600 || list.LocationId==1700 || list.LocationId==1800 || list.LocationId==1900))}"/>
                        </af:forEach>
                    </af:selectOneChoice>



• Now value given in Expression for Location Id will be disabled for given Department
• Run your page and select DepartmentId 100 and 110 to see disabled list items

 Download Sample App Cheers :-)