ADFFacesContext adfFacesContext1=AdfFacesContext.getCurrentInstance();
adfFacesContext1.addPartialTarget(text2);
<af:inputText label="Label 1" id="it1"
binding="#{test1.text1}"/>
<af:button text="button 1" id="b1"
actionListener="#{test1.Copybtn}"/>
<af:inputText label="Label 2" id="it2"
binding="#{test1.text2}" partialTriggers="b1"/>
When-Validate-Item:
Text1:[ ]
Text2:[ ]
Need to enter Department number in text1 then automatically populate
Text2 value based on Text1.
Steps:
Properties for Text2:
PartialTrigger: Text1
Properties for Text1:
AutoSubmit: True
Resetting form in ADF
popup / Reset Any component
While developing a Form on ADF pop-up I have
learned that the pop-up is fetched once on page load. On canceling the pop-up
& open it again it still persists its data which is not what we all need.
I have tried many ways to reset the form as setting contentDelivery=”lazyUncashed” , resetting all the fields programmatically , delete dirty data & clear VO cache associated with the form. Until i found the magic line which resets the component as it wasn’t fetched before
UIComponent myPopupComponent = actionEvent.getComponent();
oracle.adf.view.rich.util.ResetUtils.reset(myPopupComponent);
I have tried many ways to reset the form as setting contentDelivery=”lazyUncashed” , resetting all the fields programmatically , delete dirty data & clear VO cache associated with the form. Until i found the magic line which resets the component as it wasn’t fetched before
UIComponent myPopupComponent = actionEvent.getComponent();
oracle.adf.view.rich.util.ResetUtils.reset(myPopupComponent);
Resetting
the page contents or undoing the changes made by a user is a very common use
case scenario in Rich Internet Applications. The 'reset action' should skip all
validations defined on the current page and page contents needs to restored
from the underlying data layer. Some of the web frameworks support this feature
out of the box. Let me try explaining possible ways to reset a page when
developing applications using ADFFaces.
1. <af:resetButton>
As the name suggests, af:resetButton resets the contents of a form. Please note that developer doesn't have much control here as he/she might not be able to bind any action method with this built in reset button.
1. <af:resetButton>
As the name suggests, af:resetButton resets the contents of a form. Please note that developer doesn't have much control here as he/she might not be able to bind any action method with this built in reset button.
<af:resetButton text="ResetButton"
id="rb1"/>
2.
<af:resetActionListener>
This tag is usually bound to an action source like command button to reset all submitted values whenever an action is triggered. Obviously this gives more control to the developer as the action sources like command button can be optionally bound to an action method through the Expression Language(EL). Please note that, you may need to keep immediate="true" for the command button ( for the action source ) to skip the validations while implementing the reset/cancel behavior.
This tag is usually bound to an action source like command button to reset all submitted values whenever an action is triggered. Obviously this gives more control to the developer as the action sources like command button can be optionally bound to an action method through the Expression Language(EL). Please note that, you may need to keep immediate="true" for the command button ( for the action source ) to skip the validations while implementing the reset/cancel behavior.
<af:commandButton text="Cancel with
resetAction" id="cb2"
immediate="true"
partialSubmit="true"
actionListener="#{SomeBean.cancelBusinessAction}">
<af:resetActionListener/>
</af:commandButton>
Why
do we need to reset submitted values?
Each component has local cache value. When you submit a form, submitted value gets assigned to this localValue at the end of 'PROCESS VALIDATIONS' pahse, and thereafter submitted value is set as null. During the RENDER RESPONSE, first consult the local value property of this component. If non-null return it. If null, see if we have a ValueExpression for the value property. UIInput::resetValue() reset the submitted value that would force the rendering logic to take the value from the model/binding layer.
3. Custom Reset Implementation
So far so good, but in some scenarios developers may need to dirty their hands a bit to get the job done - where the declarative 'reset' support is missing. I noticed a rare use case scenario recently, that calls for custom reset implementation. There master-detail data is displayed in tabular form and user is allowed to edit one master record (and it's children as well) at a time, then save that record and proceed to next. In case user decided to navigate to next record without saving current record, then current changes needs to be cancelled. Though use case is bit odd one, adding this feature is pretty simple. All we need to is override the default selectionListener and from this custom method, parse the component tree and call reset on each element.
Code Snippet:
Each component has local cache value. When you submit a form, submitted value gets assigned to this localValue at the end of 'PROCESS VALIDATIONS' pahse, and thereafter submitted value is set as null. During the RENDER RESPONSE, first consult the local value property of this component. If non-null return it. If null, see if we have a ValueExpression for the value property. UIInput::resetValue() reset the submitted value that would force the rendering logic to take the value from the model/binding layer.
3. Custom Reset Implementation
So far so good, but in some scenarios developers may need to dirty their hands a bit to get the job done - where the declarative 'reset' support is missing. I noticed a rare use case scenario recently, that calls for custom reset implementation. There master-detail data is displayed in tabular form and user is allowed to edit one master record (and it's children as well) at a time, then save that record and proceed to next. In case user decided to navigate to next record without saving current record, then current changes needs to be cancelled. Though use case is bit odd one, adding this feature is pretty simple. All we need to is override the default selectionListener and from this custom method, parse the component tree and call reset on each element.
Code Snippet:
public
void customSelectionHandler(SelectionEvent selectionEvent) {
UIComponent source = (UIComponent)selectionEvent.getSource();
UIComponent uiComp = _getRootToReset(source);
_resetChildren(uiComp);
EL.invokeMethod(
"#{bindings.DepartmentsView11.collectionModel.makeCurrent}",
SelectionEvent.class, selectionEvent);
}
On a related note, I would suggest you to look at the source of org.apache.myfaces.trinidadinternal.taglib.listener.ResetActionListener, that may help you to understand the 'reset' concept much better. (Even the below given sample application just tries to reuse the same reset logic from ResetActionListener class).
package de.hahn.blog.resetformfields.view.backing;
import javax.faces.component.UIComponent;
import javax.faces.event.ActionEvent;
import oracle.adf.share.logging.ADFLogger;
import oracle.adf.view.rich.component.rich.nav.RichCommandButton;
import oracle.adf.view.rich.component.rich.nav.RichResetButton;
import oracle.adf.view.rich.util.ResetUtils;
public class BRFFBean
{
private static ADFLogger
_logger = ADFLogger.createADFLogger(BRFFBean.class);
private RichCommandButton
buttonResetActionListener;
private RichCommandButton
buttonResetByBean;
private RichResetButton
buttonResetButton;
public BRFFBean()
{
}
public void
resetFormFieldsListener(ActionEvent actionEvent)
{
// check if hte action
has a component attatched
UIComponent uiComp =
actionEvent.getComponent();
if (uiComp == null)
{
// if not we use the
button which we bound to this bean
uiComp=getButtonResetByBean();
_logger.info("reset fields: buttonID = " + uiComp.getId());
}
else
{
_logger.info("reset fields: CompID = " + uiComp.getId());
}
// pass component inside
the UIForm, UIXForm, UIXSubform, UIXRegion, UIXPopup, RichCarousel
// or RichPanelCollection
which holds the components to reset
ResetUtils.reset(uiComp);
}
public void
setButtonResetActionListener(RichCommandButton buttonResetActionListener)
{
this.buttonResetActionListener = buttonResetActionListener;
}
public RichCommandButton
getButtonResetActionListener()
{
return
buttonResetActionListener;
}
public void
setButtonResetByBean(RichCommandButton buttonResetByBean)
{
this.buttonResetByBean =
buttonResetByBean;
}
public RichCommandButton
getButtonResetByBean()
{
return buttonResetByBean;
}
public void
queueAction1Listener(ActionEvent aEvent)
{
_logger.info("Queue
action for button wiht af:resetActionListener");
ActionEvent actionEvent =
new ActionEvent(this.getButtonResetActionListener());
actionEvent.queue();
}
public void
queueAction2Listener(ActionEvent aEvent)
{
_logger.info("Queue
action for af:resetButton");
ActionEvent actionEvent =
new ActionEvent(this.getButtonResetButton());
actionEvent.queue();
}
public void
setButtonResetButton(RichResetButton buttonResetButton)
{
this.buttonResetButton =
buttonResetButton;
}
public RichResetButton
getButtonResetButton()
{
return buttonResetButton;
}
}
To set first value as default
value in Select One Choice in adf table
Sometimes we need to set first value as default value in Select one
choice. For that , we may have so many options :
We can give unSelectLabel property of SelectOneChoice component. But we
could not get that value in backing bean. (we can display in UI only but its
value is null).
<af:selectOneChoice value=”#{bindings.DepartmentId.inputValue}”
unselectedLabel=”Select Value” …./>
unselectedLabel=”Select Value” …./>
But we don’t want null and it to be some proper value like 1st value in
the drop down.
Another option to set that in managed bean , create binding to that
drop down in managed bean and in its setter we can add the following code :
public void setChoice(RichSelectChoice choice) {
this.choice = choice;
this.choice.setValue(0); // here we can set 1st value (with index
o as default value to the drop down)
}
we can display it in the ui properly while loading the page, but when
we scroll up and down in the table with that drop down in a column, it can’t
set the default value to that component. It will result in blank.
In such scenario’s we have another option to achieve this :
To create LOV , I have added some view object as view accessor to the
main vo and created transient attribute. To that attr I have added LOV.
Now create RowImpl class for the VO and in the getter method of
transient attribute add the following code :
public String getReopen() {
if(getAttributeInternal(REOPEN)!=null)
return (String) getAttributeInternal(REOPEN);
else
{
Row row = (Row)this.getLookupVA().first(); // first row from view accessor
if(row!=null)
return (String)row.getAttribute(“LookupCode”);
}
return null;
}
if(getAttributeInternal(REOPEN)!=null)
return (String) getAttributeInternal(REOPEN);
else
{
Row row = (Row)this.getLookupVA().first(); // first row from view accessor
if(row!=null)
return (String)row.getAttribute(“LookupCode”);
}
return null;
}
It will automatically return the first value from drop down as the
default value.
How To in Jdeveloper ADF Tutorials- reset the inputText
component values
Sometimes the value of the inputText component is not refreshed and the
value that was previously entered will still persist within the component. To
overcome this issue. we have to use the resetValue() method to reset the
component value and display the components intial state
What it does:
Get handle to the inputText component using the JSFUtils find component
method with the inputText id passed as a parameter
set the submitted value of the inputText as null
reset’s the input component value
refresh the component
|
private void resetInputText(String id) {
RichInputText input =
(RichInputText)JSFUtils.findComponentInRoot(id);
input.setSubmittedValue(null);
input.resetValue();
AdfFacesContext.getCurrentInstance().addPartialTarget(input);
}
|
Usage:
This method is used to reset the inputText component value’s in a
popup, af:formlayout, af:table.
ADF UI - Resetting or Clearing form fields in ADF
popup on clicking ' Cancel '.
Sample UseCase: Suppose
the popup has input form fields to enter data with say OK and Cancel buttons,
and when the user enters data and clicks on 'Cancel' button, we need to close
the popup and reset all values entered in the popup's fields. If you don't
reset the values, if you invoke the same popup again, it'll show the same previously
entered values in the form which is unwanted. So, how to show the popup without
the previous values?
Solution:
1. Set popup's 'contentDelivery' property to 'lazyUncached'. Setting this property won't cache the data entered and won't restore the previously entered values. This is highly recommended to set contentDelivery="lazyUncached" for better performance as the popup will be loaded only on invocation but not at the time of page loading.
Solution:
1. Set popup's 'contentDelivery' property to 'lazyUncached'. Setting this property won't cache the data entered and won't restore the previously entered values. This is highly recommended to set contentDelivery="lazyUncached" for better performance as the popup will be loaded only on invocation but not at the time of page loading.
2. If the step1 doesn't work, drop af:resetActionListener as a sub-element to 'Cancel' button in the popup. ResetActionListener will reset the form fields in the popup. We can also call ResetActionListener programmatically in an actionlistener method as follows using Oracle's internal API.
But, using internal API in the code is not encouraged. There is public API to achieve the same using the below code.
But, this Public API is not yet available in the latest publicly available Jdeveloper available and it'll be available in the upcoming versions. Until then, we need to go ahead using internal API only as shown in step2.
You might also like:
Read more: Oracle ADF - Tips and Techniques: ADF UI - Resetting or clearing form fields in ADF popup on clicking 'Cancel' http://www.adftips.com/2010/10/adf-ui-resetting-or-clearing-form.html#ixzz4r0dOPDOA
How to Identify a View Object is modified
Create Action Listener for the Next button and name the bean as
ModifiedVOBean.java and method as chkmeth. Inside the method get the bindings
for the EmployessVO1 .
DCBindingContainer bindings2 =
(DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
JUCtrlHierBinding obj = (JUCtrlHierBinding)bindings2.findCtrlBinding("EmployeesVO1");
ViewObject targetVO = obj.getViewObject();
we can get the current status of the view object instance using a method isDirty().
Boolean b = targetVO.getApplicationModule().getTransaction().isDirty();
This gives Boolean value of True/False . If something is modified/created the value will be True else False.
Final piece of code is
DCBindingContainer bindings2 =
(DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
JUCtrlHierBinding obj = (JUCtrlHierBinding)bindings2.findCtrlBinding("EmployeesVO1");
ViewObject targetVO = obj.getViewObject();
we can get the current status of the view object instance using a method isDirty().
Boolean b = targetVO.getApplicationModule().getTransaction().isDirty();
This gives Boolean value of True/False . If something is modified/created the value will be True else False.
Final piece of code is
public void chkMeth(ActionEvent actionEvent) {
DCBindingContainer bindings2 =
(DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
JUCtrlHierBinding obj = (JUCtrlHierBinding)bindings2.findCtrlBinding("EmployeesVO1");
ViewObject targetVO = obj.getViewObject();
Boolean b = targetVO.getApplicationModule().getTransaction().isDirty();
FacesMessage msg=null;
Boolean ev = false;
if(b!=ev){
msg=new FacesMessage("Hold on ,you have unsaved data.pls commit before proceeding");
FacesContext.getCurrentInstance().addMessage(null,msg);
}
}
The boolean result can be evulated against True/False and based on it we can throw a message to the user . Now go to the page and change something in any of the column and click Next. you will get the message.Further you can customize the implementation the way u want like information in the pop up dialog
and so on.
DCBindingContainer bindings2 =
(DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
JUCtrlHierBinding obj = (JUCtrlHierBinding)bindings2.findCtrlBinding("EmployeesVO1");
ViewObject targetVO = obj.getViewObject();
Boolean b = targetVO.getApplicationModule().getTransaction().isDirty();
FacesMessage msg=null;
Boolean ev = false;
if(b!=ev){
msg=new FacesMessage("Hold on ,you have unsaved data.pls commit before proceeding");
FacesContext.getCurrentInstance().addMessage(null,msg);
}
}
The boolean result can be evulated against True/False and based on it we can throw a message to the user . Now go to the page and change something in any of the column and click Next. you will get the message.Further you can customize the implementation the way u want like information in the pop up dialog
and so on.
we can also able to get Entity level status from VO using this code
RowSetIterator rs1 =targetVO.createRowSetIterator(null);
while (rs1.hasNext()) {
EmployeesVORowImpl r = rs1.next();
Entity eo = r.getEntity(0);
byte currentState= eo.getEntityState();
if(currentState==EntityImpl.STATUS_NEW .......)
{
......
}
}
From design time we can access the row status using the following expression
Expression #{row.row.entities[0].entityState}
Getting the View object in MB and performing operations on it is not a good practice.
ADF : Accessing column value from ADF table row
There are cases where we need to show only a number in the Ui that comes from a different ViewObject .. Infact the real case scenario is ViewObject that has count(*) as result and we need to print that to the user in a tab or textbox.. look at the example
The Tab displays the Total Countries ..
select countries(*) as Count from COUNTRY group by countries ; This will return a single value..we generally tend to use VO.getEstimatedRowCount to get all the rowvalues and display .. The way to achieve and retrieve this is very simple ...
Following code snippet will help to achieve that
public int getCount() {
Long val = 0;
ViewObject vo = this.getCountryVO();
vo.executeQuery();
RowSetIterator rsIterator = vo.createRowSetIterator(null);
rsIterator.reset();
while (rsIterator.hasNext()) {
Row row = rsIterator.next();
val = ((BigDecimal)row.getAttribute("Count1")).longValue();
}
rsIterator.closeRowSetIterator();
return val;
}
Expose this method in the AM Client Interface .Add this method to the page bindings as methodAction. Go to executable section in the pagedef , add invokeAction to this method . This will get invoked every time when the page is loaded . This brings the count available during pageload
Add this expr to the place where you need to print the result .
#{bindings.getCount.resul}
You can also access that method directly on clicking some button or link via ActionListener without having to InvokeAction under executables section ...
=================
<b>in Jsff :</b>
<af:inputText
label="Id" id="it1"
binding="#{pageFlowScope.SourceFile1.id}"/>
<b>in Bean</b>
private RichInputText id;
public void setId(RichInputText
id) {
this.id = id;
}
public RichInputText getId() {
return id;
}
public void
onClickSubmit(ActionEvent actionEvent) {
System.out.println(this.getId().getValue().toString());
}
=====================
ADF DataControl Built-in View Operations - Part II
Followed from ADF Data
Control built-in view operations I .
1) Execute :
It will execute the View Object's Query . It Refreshes the data collection . This is similar to
vo.executeQuery();
2) ExecuteWithParameters :
This operation appears only for ADF view objects that have defined one or more bind variables . This will also execute the view object with the parameter values being passed to the bind variables .
1) Execute :
It will execute the View Object's Query . It Refreshes the data collection . This is similar to
vo.executeQuery();
2) ExecuteWithParameters :
This operation appears only for ADF view objects that have defined one or more bind variables . This will also execute the view object with the parameter values being passed to the bind variables .
3) setCurrentRowWithKey :
If ever want to avoid the default selected row of view object and set an any other row as current row , you can do this using setCurrentRowWithKey . Every row in the view object will have a String representation that uniquely identifies a particular row and using that string being passed as a parameter to rowset. If found set that as current row .
Note : This Method will work only on the collection that has only one key attribute.
3) setCurrentRowWithKeyValue :
This takes the value for a key attribute , if found set that as current row.
you can access the value of the string key of a row by using rowKeyStr property (e g:#{row.rowKeyStr})
4) removeRowWithKey :
If ever want to delete a particular row you can remove that row using removeRowWithKey. The delete operation can be used to delete rows but it will always delete the current row.
If ever want to avoid the default selected row of view object and set an any other row as current row , you can do this using setCurrentRowWithKey . Every row in the view object will have a String representation that uniquely identifies a particular row and using that string being passed as a parameter to rowset. If found set that as current row .
Note : This Method will work only on the collection that has only one key attribute.
3) setCurrentRowWithKeyValue :
This takes the value for a key attribute , if found set that as current row.
you can access the value of the string key of a row by using rowKeyStr property (e g:#{row.rowKeyStr})
4) removeRowWithKey :
If ever want to delete a particular row you can remove that row using removeRowWithKey. The delete operation can be used to delete rows but it will always delete the current row.
getting Attribute value from View Object column in ADF
Read more: http://www.techartifact.com/blogs/2012/09/getting-attribute-value-from-view-object-column-in-adf.html#ixzz4r1RhxPsv
Read more: http://www.techartifact.com/blogs/2012/09/getting-attribute-value-from-view-object-column-in-adf.html#ixzz4r1RhxPsv
Hi All,
When ever we want to
have value of some attribute we can use below code .It work fine in managed and
backing bean .
Create a java class and import
Create a java class and import
|
import oracle.adf.model.BindingContext;
import oracle.adf.model.binding.DCBindingContainer;
import oracle.adf.model.binding.DCIteratorBinding;
|
and using below code get
value of any attribute
|
BindingContext ctx =
BindingContext.getCurrent();
DCBindingContainer
bc = (DCBindingContainer)ctx.getCurrentBindingsEntry();
DCIteratorBinding
iterator = bc.findIteratorBinding("ViewObjectIterator");
Row r =
iterator.getCurrentRow();
String empNameValue
= (String)r.getAttribute("EmpName");
|
No comments:
Post a Comment