BC4J: Override Views Object default package

Hi all,
I need to change the package of the views objects when creating the entity object by reverse engineering from DB. As they are created in the same package of the entity objects.
Thankx

Yes, you can. No one step can do all thing for me.

Similar Messages

RowSetInfo; bc4j; how to get the View Object

So I'm trying to get/update/insert/delete records in a database that contain an interMedia image in a blob.
I've figured out that I can't simply set the ImmediateAccess attribute. It doesn't like that...
So I'm trying to go after the view object, since the interMedia white paper uses a VO row setAttribute to accomplish the write.
RowSetInfo extends ResultSetInfo which has a method getViewObject(). Cool.
So I try it... and get an error that getViewObject() has protected access.
Anyone know what I am doing wrong? Or should I be even taking this approach?!?!?!
If I go exclusively with the VO layer... how do I preserve the navigationBar functionality? Or do I need to roll my own?
( NOTE: This hilights another example of the perception of 'friction' between rowsetinfos and the view objects/entity objects. An approach that makes "sense" to me as a naive novice didn't pan out. And oddly, most of the bc4j examples go against VOs when, if you are an application programmer, you may never see or use the VO methods ( although it looks like we should be)... we're working at the ResultSetInfo layer. )
Is the the observation of other folk who are building Java Applications/Applets? Or do you all work directly with VOs instead of going through the ResultSetInfo "layer"?

Here is some sample code that I am currently working on and will post on OTN when complete. The code shows how to access a BC4J Domain based on an Oracle type. Working with interMedia is similar since interMedia utilizes Oracle Object types. Please note that I have not tested this yet against interMedia, but I'm hoping that you may find the general process useful.
// Copyright (c) 2000 Oracle Corporation
package ObjectSampleDAC;
import oracle.dacf.control.swing.*;
import javax.swing.*;
import oracle.dacf.dataset.*;
import oracle.dacf.dataset.connections.*;
import java.awt.*;
import oracle.jdeveloper.layout.*;
import java.awt.event.*;
import javax.infobus.*;
import oracle.jbo.domain.DomainInterface;
import ObjectSampleBC4J.common.TAddress;
import java.sql.SQLException;
* A Frame class.
* <P>
* @author Scott Tiger
public class Frame1 extends InfoFrame {
* Constructs a new instance.
public Frame1() {
super();
try {
jbInit();
sessionInfo1.publishSession();
// call my initialization method
bfInit();
catch (Exception e) {
e.printStackTrace();
* Initializes the state of this instance.
private void jbInit() throws Exception {
/* All of the following code in this method was added by the designer except where noted below
EmailrowSetInfo1.setName("Email");
jPanel3.setLayout(gridBagLayout1);
StatusrowSetInfo1.setName("Status");
AddressrowSetInfo1.setName("Address");
PasswordrowSetInfo1.setName("Password");
UsernamerowSetInfo1.setName("Username");
LastnamerowSetInfo1.setName("Lastname");
FirstnamerowSetInfo1.setName("Firstname");
IdrowSetInfo1.setName("Id");
rowSetInfo1.setAttributeInfo( new AttributeInfo[] {
IdrowSetInfo1,
FirstnamerowSetInfo1,
LastnamerowSetInfo1,
UsernamerowSetInfo1,
PasswordrowSetInfo1,
AddressrowSetInfo1,
StatusrowSetInfo1,
EmailrowSetInfo1} );
this.setDataItemName("infobus:/oracle/sessionInfo1");
this.setTitle("Customer Information");
this.getContentPane().setLayout(borderLayout1);
this.setSize(new Dimension(536, 473));
jPanel1.setLayout(borderLayout2);
sessionInfo1.setAppModuleInfo(new ModuleInfo("ObjectSampleBC4J", "ObjectSampleBC4JModule"));
sessionInfo1.setConnectionInfo(new LocalConnection("MyJdbcConn"));
sessionInfo1.setName("sessionInfo1");
rowSetInfo1.setQueryInfo(new QueryViewInfo(
"CustomerView",
rowSetInfo1.setSession(sessionInfo1);
rowSetInfo1.setName("rowSetInfo1");
/* The following listener was added using the event tab in the property inspector in design
mode. The rowsetPopulated method is called when the rowset is queried/requeried.
rowSetInfo1.addChangeListener(new oracle.dacf.dataset.ChangeAdapter() {
public void rowsetPopulated(RowSetChangeEvent e) {
rowSetInfo1_rowsetPopulated(e);
textFieldControl1.setText("textFieldControl1");
textFieldControl2.setDataItemName("infobus:/oracle/sessionInfo1/rowSetInfo1/Firstname");
textFieldControl2.setText("textFieldControl2");
textFieldControl3.setDataItemName("infobus:/oracle/sessionInfo1/rowSetInfo1/Lastname");
textFieldControl3.setText("textFieldControl3");
textFieldControl4.setDataItemName("infobus:/oracle/sessionInfo1/rowSetInfo1/Username");
textFieldControl4.setText("textFieldControl4");
textFieldControl5.setDataItemName("infobus:/oracle/sessionInfo1/rowSetInfo1/Password");
textFieldControl5.setText("textFieldControl5");
textFieldControl6.setDataItemName("infobus:/oracle/sessionInfo1/rowSetInfo1/Status");
textFieldControl6.setText("textFieldControl6");
textFieldControl7.setDataItemName("infobus:/oracle/sessionInfo1/rowSetInfo1/Email");
textFieldControl7.setText("textFieldControl7");
navigationBar1.setDataItemName("infobus:/oracle/sessionInfo1/rowSetInfo1");
jLabel1.setText("ID:");
jLabel2.setText("First Name:");
jLabel3.setText("Last Name:");
jLabel4.setText("User Name:");
jLabel5.setText("Password:");
jLabel6.setText("Status:");
jLabel7.setText("Email:");
jLabel8.setText("Address:");
jPanel4.setLayout( gridBagLayout2);
textFieldStreet.setColumns(20);
textFieldStreet.setText("textFieldStreet");
/* The following listener (as well as the listeners on textFieldCity, textFieldState, and
textFieldZipcode were added by the designer, but the focusGained and focusLost methods
were modified in each case to call a common textField_focusGained method
textFieldStreet.addFocusListener(new java.awt.event.FocusAdapter() {
public void focusGained(FocusEvent e) {
textField_focusGained(e);
public void focusLost(FocusEvent e) {
textField_focusLost(e);
textFieldCity.setColumns(20);
textFieldCity.setText("textFieldCity");
textFieldCity.addFocusListener(new java.awt.event.FocusAdapter() {
public void focusGained(FocusEvent e) {
textField_focusGained(e);
public void focusLost(FocusEvent e) {
textField_focusLost(e);
textFieldState.setColumns(20);
textFieldState.setText("textFieldState");
textFieldState.addFocusListener(new java.awt.event.FocusAdapter() {
public void focusGained(FocusEvent e) {
textField_focusGained(e);
public void focusLost(FocusEvent e) {
textField_focusLost(e);
textFieldZipcode.setColumns(20);
textFieldZipcode.setText("textFieldZipcode");
textFieldZipcode.addFocusListener(new java.awt.event.FocusAdapter() {
public void focusGained(FocusEvent e) {
textField_focusGained(e);
public void focusLost(FocusEvent e) {
textField_focusLost(e);
jLabel9.setText("Street:");
jLabel10.setText("City:");
jLabel11.setText("State:");
jLabel12.setText("Zip Code:");
textFieldControl1.setDataItemName("infobus:/oracle/sessionInfo1/rowSetInfo1/Id");
this.getContentPane().add(jPanel1, BorderLayout.CENTER);
jPanel1.add(jPanel2, BorderLayout.NORTH);
jPanel2.add(navigationBar1, null);
jPanel1.add(jPanel3, BorderLayout.CENTER);
jPanel3.add(textFieldControl1, new GridBagConstraints2(1, 0, 1, 1, 1.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(37, 11, 0, 0), 0, 0));
jPanel3.add(textFieldControl2, new GridBagConstraints2(1, 1, 1, 1, 1.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(7, 11, 0, 0), 0, 0));
jPanel3.add(textFieldControl3, new GridBagConstraints2(1, 2, 1, 1, 1.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(7, 11, 0, 0), 0, 0));
jPanel3.add(textFieldControl4, new GridBagConstraints2(1, 3, 1, 1, 1.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(6, 11, 0, 0), 0, 0));
jPanel3.add(textFieldControl5, new GridBagConstraints2(1, 4, 1, 1, 1.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(6, 11, 0, 0), 0, 0));
jPanel3.add(textFieldControl6, new GridBagConstraints2(1, 5, 1, 1, 1.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(7, 11, 0, 0), 0, 0));
jPanel3.add(textFieldControl7, new GridBagConstraints2(1, 6, 1, 1, 1.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(6, 11, 0, 0), 0, 0));
jPanel3.add(jLabel1, new GridBagConstraints2(0, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(37, 106, 0, 0), 0, 0));
jPanel3.add(jLabel2, new GridBagConstraints2(0, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(8, 54, 0, 0), 0, 0));
jPanel3.add(jLabel3, new GridBagConstraints2(0, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(8, 54, 0, 0), 0, 0));
jPanel3.add(jLabel4, new GridBagConstraints2(0, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(10, 54, 0, 0), 0, 0));
jPanel3.add(jLabel5, new GridBagConstraints2(0, 4, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(8, 62, 0, 0), 0, 0));
jPanel3.add(jLabel6, new GridBagConstraints2(0, 5, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(9, 83, 0, 0), 0, 0));
jPanel3.add(jLabel7, new GridBagConstraints2(0, 6, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(9, 86, 0, 0), 0, 0));
jPanel3.add(jLabel8, new GridBagConstraints2(0, 7, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(7, 72, 94, 0), 0, 0));
jPanel3.add(jPanel4, new GridBagConstraints2(1, 7, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
jPanel4.add(textFieldZipcode, new GridBagConstraints2(1, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 10, 0, 0), 0, 0));
jPanel4.add(textFieldState, new GridBagConstraints2(1, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 10, 0, 0), 0, 0));
jPanel4.add(jLabel9, new GridBagConstraints2(0, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.EAST, GridBagConstraints.NONE, new Insets(5, 0, 0, 0), 0, 0));
jPanel4.add(textFieldStreet, new GridBagConstraints2(1, 0, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 10, 0, 0), 0, 0));
jPanel4.add(jLabel10, new GridBagConstraints2(0, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.EAST, GridBagConstraints.NONE, new Insets(5, 0, 0, 0), 0, 0));
jPanel4.add(jLabel11, new GridBagConstraints2(0, 2, 1, 1, 0.0, 0.0,
GridBagConstraints.EAST, GridBagConstraints.NONE, new Insets(5, 0, 0, 0), 0, 0));
jPanel4.add(jLabel12, new GridBagConstraints2(0, 3, 1, 1, 0.0, 0.0,
GridBagConstraints.EAST, GridBagConstraints.NONE, new Insets(5, 0, 0, 0), 0, 0));
jPanel4.add(textFieldCity, new GridBagConstraints2(1, 1, 1, 1, 0.0, 0.0,
GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 10, 0, 0), 0, 0));
/* The following vaiable declarations were made by the designer
BorderLayout borderLayout1 = new BorderLayout();
JPanel jPanel1 = new JPanel();
SessionInfo sessionInfo1 = new SessionInfo();
RowSetInfo rowSetInfo1 = new RowSetInfo();
AttributeInfo IdrowSetInfo1 = new AttributeInfo(java.sql.Types.NUMERIC);
AttributeInfo FirstnamerowSetInfo1 = new AttributeInfo(java.sql.Types.VARCHAR);
AttributeInfo LastnamerowSetInfo1 = new AttributeInfo(java.sql.Types.VARCHAR);
AttributeInfo UsernamerowSetInfo1 = new AttributeInfo(java.sql.Types.VARCHAR);
AttributeInfo PasswordrowSetInfo1 = new AttributeInfo(java.sql.Types.VARCHAR);
AttributeInfo AddressrowSetInfo1 = new AttributeInfo();
AttributeInfo StatusrowSetInfo1 = new AttributeInfo(java.sql.Types.VARCHAR);
AttributeInfo EmailrowSetInfo1 = new AttributeInfo(java.sql.Types.VARCHAR);
JPanel jPanel2 = new JPanel();
JPanel jPanel3 = new JPanel();
TextFieldControl textFieldControl1 = new TextFieldControl();
TextFieldControl textFieldControl2 = new TextFieldControl();
TextFieldControl textFieldControl3 = new TextFieldControl();
TextFieldControl textFieldControl4 = new TextFieldControl();
TextFieldControl textFieldControl5 = new TextFieldControl();
TextFieldControl textFieldControl6 = new TextFieldControl();
TextFieldControl textFieldControl7 = new TextFieldControl();
BorderLayout borderLayout2 = new BorderLayout();
NavigationBar navigationBar1 = new NavigationBar();
JLabel jLabel1 = new JLabel();
JLabel jLabel2 = new JLabel();
JLabel jLabel3 = new JLabel();
JLabel jLabel4 = new JLabel();
JLabel jLabel5 = new JLabel();
JLabel jLabel6 = new JLabel();
JLabel jLabel7 = new JLabel();
JLabel jLabel8 = new JLabel();
GridBagLayout gridBagLayout1 = new GridBagLayout();
JPanel jPanel4 = new JPanel();
JTextField textFieldStreet = new JTextField();
JTextField textFieldCity = new JTextField();
JTextField textFieldState = new JTextField();
JTextField textFieldZipcode = new JTextField();
JLabel jLabel9 = new JLabel();
JLabel jLabel10 = new JLabel();
JLabel jLabel11 = new JLabel();
JLabel jLabel12 = new JLabel();
GridBagLayout gridBagLayout2 = new GridBagLayout();
/* The following declarations were made manually
/* DomainAccess provides a means for getting and setting values of a column object as domain
DomainAccess da = null;
/* TAddress is the domain class
TAddress addr = null;
/* Declare variables for determining if JTextField values have been changed by user
String oldVal = null;
String newVal = null;
/* The following method is generated by the wizard when the frame was created
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSED) {
System.exit(0);
public void bfInit () throws Exception {
/* To add code to be invoked when the user moves from one row to another, get the
DataItemChangeManager from the RowSetInfo (via RowsetAccess) and add a
DataItemChangeListener. The specific method we want to use here is rowsetCursorMoved
which is invoked when the user moves from one row to another; the other methods are
defined simply because the interface requires them.
RowsetAccess ra = rowSetInfo1.getRowsetAccess();
DataItemChangeManager dcm = (DataItemChangeManager)ra;
dcm.addDataItemChangeListener(new DataItemChangeListener() {
public void rowsetCursorMoved(RowsetCursorMovedEvent e) {
rowSetInfo1_rowsetCursorMoved(e);
public void dataItemAdded(DataItemAddedEvent e) {
public void dataItemDeleted(DataItemDeletedEvent e) {
public void dataItemRevoked(DataItemRevokedEvent e) {
public void dataItemValueChanged(DataItemValueChangedEvent e) {
/* This method was generated by the designer. See rowSetInfo1.addChangeListener(...) in jbInit
above.
void rowSetInfo1_rowsetPopulated(RowSetChangeEvent e) {
try {
/* When the rowset is populated, set the JTextField values based on the domain. See
updateFields() below.
updateFields();
catch (Exception ex) {
System.out.println("Error occurred while retrieving values");
ex.printStackTrace();
/* This method was added manually to track row navigation. See dcm.addDataItemChangeListener(...)
in jbInit above.
void rowSetInfo1_rowsetCursorMoved(RowsetCursorMovedEvent e) {
try {
/* When the user moves from one row to another, set the JTextField values based on the
domain. See updateFields() below.
updateFields();
catch (Exception ex) {
System.out.println("Error occured while assigning values");
ex.printStackTrace();
/* This method finds the values from each field of the column object by using the domain, then
sets the values of the JTextFields respectively. It is invoked when the rowset is initially
populated, and each time the user moves from one row to another.
public void updateFields () throws Exception {
/* Get DataItem for the Address column object and cast to DomainAccess for to prepare for
getting and setting column value as domain.
da = (DomainAccess)AddressrowSetInfo1.getImmediateAccess();
/* Get the value of the attribute as a Domain and cast to DomainInterface.
DomainInterface di = da.getValueAsDomain();
/* null out addr. Otherwise, if the address column is null for a particular record, when
the user navigates to the record with the null values, addr will retain the previous record's
values. This ensures a clean slate.
addr = null;
/* Using DomainInterface allows us to cast the domain object to the specific Domain class for
that type. So, cast the address attribute's value to TAddress, the class that
represents the T_ADDRESS type created in the database. This provides getters and setters
for each of the fields of the Object Type.
if ( di instanceof TAddress ) {
addr = (TAddress) di;
/* If the above statement resulted in some non-null object assigned to addr, it is because
one or more of the fields of the domain contained non-null values. Therefore, if addr is
not null, get the values from each field of the domain and assign them to their
respective JTextFields. Otherwise, set each JTextField to an empty string.
if (addr != null) {
textFieldStreet.setText(addr.getStreet());
textFieldCity.setText(addr.getCity());
textFieldState.setText(addr.getState());
textFieldZipcode.setText(addr.getZipcode());
else {
textFieldStreet.setText("");
textFieldCity.setText("");
textFieldState.setText("");
textFieldZipcode.setText("");
/* If addr is null, after making sure the JTextFields are cleared, create a new TAddress
object so that we have something to assign values to if the user edits the JTextFields.
try {
addr = new TAddress();
catch (SQLException ex) {
System.out.println("Error creating domain TAddress");
ex.printStackTrace();
/* The method below is invoked when the user navigates to textFieldStreet, textFieldCity,
textFieldState, or textFieldZipcode. It's used just to find the value of the field when
the user enters the field (the "before" value).
void textField_focusGained(FocusEvent e) {
Object obj = e.getSource();
if (obj instanceof JTextField) {
JTextField field = (JTextField)obj;
oldVal = field.getText();
/* The method below is invoked when the user navigates away from textFieldStreet, textFieldCity,
textFieldState, or textFieldZipcode. It checks to see if the user changes the value of the
field, and if so, updates the value of the address attribute.
void textField_focusLost(FocusEvent e) {
/* Find out the value of the JTextField now that the user is attempting to leave the field.
Object obj = e.getSource();
if (obj instanceof JTextField) {
JTextField field = (JTextField)obj;
newVal = field.getText();
/* Compare the new value of the field ("after" value) to the "before" value captured
in textField_focusGained above. If they are equal, we do nothing. If they are not equal,
then the user must have changes the value in the field, and we have some work to do.
if (!oldVal.equals(newVal)) {
/* Since this same method is called regardless of which JTextField has been left, we find
out which text field the user is leaving, and then set the value of the appropriate
element of the addr domain.
if (obj.equals(textFieldStreet)) {
addr.setStreet(newVal);
if (obj.equals(textFieldCity)) {
addr.setCity(newVal);
if (obj.equals(textFieldState)) {
addr.setState(newVal);
if (obj.equals(textFieldZipcode)) {
addr.setZipcode(newVal);
/* So, we've set the value of the appropriate element of the addr domain, but we have not
"posted" those changes to the BC4J (middle-tier), so if we were to commit at this point
our changes would not get saved to the database (because BC4J is not aware of these
changes). The next step is to notify BC4J of the changes.
try {
da.setValueAsDomain(addr);
catch (InvalidDataException ex) {
System.out.println("Invalid Data assigned to TAddress");
ex.printStackTrace();
/* Clear out the oldVal and newVal variable so we are ready to track more changes.
oldVal = null;
newVal = null;
}-- Brian

Replace default table sort with order by on the view object

The Jdeveloper help for af:table says:
If the underlying model is not a CollectionModel , the Table automatically examines the actual data to determine which properties are sortable. Any column that has data that implements java.lang.Comparable is sortable. This automatic support cannot be nearly as efficient as coding sorting directly into a CollectionModel (for instance, by translating the sort into an "ORDER BY" SQL clause), but is sufficient for small data sets.
I have a database table with varchar2 columns that can contain string, date or number values. So in the af:table I want to sort the columns either in string, date or number order.
I tried creating a sort listener and in that listener set the view object order by clause and execute the query, but it does not affect the row order - it is always sorted as a string. I assume that the collection is doing its sort after I do the query, and overwriting the query order. I have tried disabling the sort in the listener by setting the sortcriteria to null but it has no effect.
Can anyone suggest how to stop the default sort re-ordering the rows, or else how to code sorting directly into the CollectionModel as suggested in the help.
Hugh Nelson

By running in debug I discovered that when you click on a column heading to sort by the column values it actually sets the order by clause on the view object and executes a query. The help says that the default sorting is not as efficient as setting the order by clause - perhaps the help is out of date because default sorting does set the order by clause.
This means that you cannot do a column sort on a transient attribute. The attribute being sorted on must exist in the table/query.
The easiest solution is to override the setOrderByClause method on the view object. The string parameter is the column to order by eg "COLUMNA". If this column holds date values I can change it to something like "TO_CHAR(TO_DATE(COLUMNA,'DD-MON-YYYY'),'YYYYMMDD')". For numbers I do "LPAD(COLUMNA,10,'0')".
This works OK.
Hugh Nelson

JSP, Data Web Bean, BC4J: Setting the where clause of a View Object at run time

Hi,
I am trying to develop a data web bean in which the where clause of a View Object will be set at run time and the results of the query then displayed.
My BC4J components are located in one project while the coding for the data web bean is in another project. I used the following code bu t it does not work. Could you please let me know what I am doing wrong?
public void populateOSTable(int P_EmpId)
String m_whereString = "EmpView.EMP_ID = " + P_EmpId;
String m_OrderBy = "EmpView.EMP_NAME";
oracle.jbo.ApplicationModule appModule = null;
ViewObject vo = appModule.findApplicationModule("EMPBC.EMPAppModule").findViewObject("EMPBC.EMPView");
vo.setWhereClause(m_whereString);
vo.setOrderByClause(m_OrderBy);
vo.executeQuery();
vo.next();
String empName numAttrs = vo.getAttribute(EmpName);
System.out.println(empName);
Thanks.

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by JDev Team (Laura):
Here is how I have usually done mine:
1. In the JSP, use a RowsetNavigator bean to set the where clause and execute the query.
2. Use a custom web bean to process the results of the query (print to HTML).
for example:
<jsp:useBean class="oracle.jbo.html.databeans.RowsetNavigator" id="rsn" scope="request" >
<%
// get the parameter from the find form
String p = request.getParameter("p");
String s = request.getParameter("s");
// store the information for reference later
session.putValue("p", p);
session.putValue("s", s);
// initialize the app module and view object
rsn.initialize(application,session, request,response,out,"wt_bc_WT_bcModule.wtjoinView");
// set the where clause string
String theclause = "presname = '" + p + "' AND slideno=" + s;
// set the where clause for the VO
rsn.getRowSet().getViewObject().setWhereClause(theclause);
rsn.getRowSet().getViewObject().executeQuery();
rsn.getRowSet().first();
%>
</jsp:useBean>
<jsp:useBean class="wt_bc.walkthruBean" id="wtb" scope="request" >
<%
// initialize the app module and VO
wtb.initialize(application,session, request,response,out,"wt_bc_WT_bcModule.wtjoinView");
wtb.render();
%>
In this case, the render method of my custom web bean mostly gets some session variables, and prints various content depending on the session variable values.
Hope this helps.
</jsp:useBean><HR></BLOCKQUOTE>
Laura can you give the code of your walkthru bean? i wna't to initialize a viewobject, set the where clause and give that viewobject back to initialize my navigatorbar.
Nathalie
null

How to change the default behaviour of View Object in oracle adf

Hi,
I have created a view object from an entity object and placed it as a table with multiple lines on my page.
When I run my page, by default, it loads all the rows based on the sql in the VO.
My requirement is when I load my page, I don't want to return any data in that table.
I am using JDeveloper 11.1.2.4.
Please can you advise how can I achieve this functionality?
thanks
Muhammad

Hi Shay,
I've used the refreshCondition #{bindings.Sku.inputValue ne null} as per your suggestion but getting below error
<RichExceptionHandler> <_logUnhandledException> ADF_FACES-60098:Faces lifecycle receives unhandled exceptions in phase RENDER_RESPONSE 6
java.lang.NullPointerException
    at oracle.adf.model.binding.DCExecutableBinding.refreshMasters(DCExecutableBinding.java:265)
    at oracle.adf.model.binding.DCExecutableBinding.refreshIfNeeded(DCExecutableBinding.java:340)
    at oracle.jbo.uicli.binding.JUCtrlHierBinding.getRootNodeBinding(JUCtrlHierBinding.java:90)
    at oracle.jbo.uicli.binding.JUCtrlHierBinding$1JUCtrlHierHintsMap.internalGet(JUCtrlHierBinding.java:210)
    at oracle.jbo.common.JboAbstractMap.get(JboAbstractMap.java:54)
    at oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding$1DecoratedHintsMap.internalGet(FacesCtrlHierBinding.java:305)
    at oracle.jbo.common.JboAbstractMap.get(JboAbstractMap.java:54)
    at javax.el.MapELResolver.getValue(MapELResolver.java:164)
    at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
    at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
    at com.sun.el.parser.AstValue.getValue(Unknown Source)
    at com.sun.el.ValueExpressionImpl.getValue(Unknown Source)
    at org.apache.myfaces.trinidad.bean.FacesBeanImpl.getProperty(FacesBeanImpl.java:73)
    at oracle.adfinternal.view.faces.renderkit.rich.table.BaseColumnRenderer.getProperty(BaseColumnRenderer.java:1195)
    at oracle.adfinternal.view.faces.renderkit.rich.table.BaseColumnRenderer.layoutHeader(BaseColumnRenderer.java:643)
    at oracle.adfinternal.view.faces.renderkit.rich.table.BaseColumnRenderer.encodeAll(BaseColumnRenderer.java:152)
    at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:511)
    at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:923)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1681)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:624)
    at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:3201)
    at oracle.adfinternal.view.faces.renderkit.rich.table.BaseTableRenderer.layoutColumnHeader(BaseTableRenderer.java:1197)
    at oracle.adfinternal.view.faces.renderkit.rich.TableRenderer.encodeAll(TableRenderer.java:636)
    at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:511)
    at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:923)
    at org.apache.myfaces.trinidad.component.UIXCollection.encodeEnd(UIXCollection.java:617)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1681)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:624)
    at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:3201)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer._encodeChild(PanelGroupLayoutRenderer.java:447)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.access$1500(PanelGroupLayoutRenderer.java:30)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:734)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:637)
    at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:187)
    at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:318)
    at org.apache.myfaces.trinidad.component.UIXComponent.encodeFlattenedChildren(UIXComponent.java:283)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.encodeAll(PanelGroupLayoutRenderer.java:360)
    at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:511)
    at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:923)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1681)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:624)
    at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:3201)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelFormLayoutRenderer._encodeFormItem(PanelFormLayoutRenderer.java:1127)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelFormLayoutRenderer.access$100(PanelFormLayoutRenderer.java:50)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelFormLayoutRenderer$FormColumnEncoder.processComponent(PanelFormLayoutRenderer.java:1604)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelFormLayoutRenderer$FormColumnEncoder.processComponent(PanelFormLayoutRenderer.java:1523)
    at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:187)
    at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:318)
    at org.apache.myfaces.trinidad.component.UIXComponent.encodeFlattenedChildren(UIXComponent.java:283)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelFormLayoutRenderer._encodeChildren(PanelFormLayoutRenderer.java:420)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelFormLayoutRenderer.encodeAll(PanelFormLayoutRenderer.java:208)
    at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:511)
    at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:923)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1681)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:624)
    at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:3201)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer._encodeChild(PanelGroupLayoutRenderer.java:447)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.access$1500(PanelGroupLayoutRenderer.java:30)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:734)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:637)
    at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:187)
    at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:318)
    at org.apache.myfaces.trinidad.component.UIXComponent.encodeFlattenedChildren(UIXComponent.java:283)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.encodeAll(PanelGroupLayoutRenderer.java:360)
    at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:511)
    at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:923)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1681)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:624)
    at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:3201)
    at oracle.adf.view.rich.render.RichRenderer.encodeStretchedChild(RichRenderer.java:2194)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelSplitterRenderer._renderPane(PanelSplitterRenderer.java:1599)
    at oracle.adfinternal.view.faces.renderkit.rich.PanelSplitterRenderer.encodeAll(PanelSplitterRenderer.java:279)
    at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:511)
    at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:923)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1681)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:624)
    at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:3201)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeAllChildren(CoreRenderer.java:641)
    at oracle.adf.view.rich.render.RichRenderer.encodeAllChildrenInContext(RichRenderer.java:3062)
    at oracle.adfinternal.view.faces.renderkit.rich.FormRenderer.encodeAll(FormRenderer.java:274)
    at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:511)
    at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:923)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1681)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:624)
    at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:3201)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeAllChildren(CoreRenderer.java:641)
    at oracle.adf.view.rich.render.RichRenderer.encodeAllChildrenInContext(RichRenderer.java:3062)
    at oracle.adfinternal.view.faces.renderkit.rich.DocumentRenderer.encodeAll(DocumentRenderer.java:1275)
    at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1452)
    at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:511)
    at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:923)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1681)
    at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1677)
    at oracle.adfinternal.view.faces.component.AdfViewRoot.encodeAll(AdfViewRoot.java:91)
    at com.sun.faces.application.view.JspViewHandlingStrategy.doRenderView(JspViewHandlingStrategy.java:431)
    at com.sun.faces.application.view.JspViewHandlingStrategy.renderView(JspViewHandlingStrategy.java:233)
    at org.apache.myfaces.trinidadinternal.application.ViewDeclarationLanguageFactoryImpl$ChangeApplyingVDLWrapper.renderView(ViewDeclarationLanguageFactoryImpl.java:350)
    at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
    at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:273)
    at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:165)
    at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._renderResponse(LifecycleImpl.java:1035)
    at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:342)
    at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:236)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:509)
    at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
    at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
    at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
    at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:173)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:125)
    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:468)
    at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)
    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:468)
    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:293)
    at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:199)
    at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119)
    at java.security.AccessController.doPrivileged(Native Method)
    at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315)
    at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442)
    at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103)
    at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171)
    at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:139)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
    at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
    at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
    at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
    at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
    at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
any ideas please?

How to put validation between attributes at View Object level in BC4J

Hi,
Is it possible in BC4J to put validation between attributes at View Object level?
I know that I can do it at Entity Object level in validateEntity method, but I have several View Objects connected with one Entity Object and don't want to have the same validation logic for all View Objects.
Thanks for any help!

It returns errorWhat error does it return?
John

Import package and create view object

Hi,
How can i import package from another project and create a new view object with my package and with the imported package.
Thanks
null

Hi,
How can i import package from another project and create a new view object with my package and with the imported package.
Thanks
null

BC4J: embedding Special SQL in View Objects

While BC4J allows for easier development because developers do not need to embed a lot of SQL in Java codes, I wonder how I could embed special SQLs either into my Java code or in the View Object Wizard. For example, the following SQL statement could not be entered into the View Object Wizard:
select key1, key2, SCORE(10),SCORE(20)
from table1
where contains (attrib1, 'apple', 10) >0 OR
contains (attrib1, 'orange', 20) > 0
Order by NVL(SCORE(10),0), NVL(SCORE(20),0);
How can I embed the above SQL statement properly in a View Object? Or do I have to write SQLJ code outside of a View Object?

As you mentioned BC4J gives the flexibility of using all valid SQL statements.
For you query above, you would have to do the following.
You would need to create caluclated attributes for SCore(10) and score(20)
Select the ViewObject in Navigator and edit it (right mouse button)
Select Attributes Tab
Click on New attribute Score(10) and you can give an alias name for that.
same goes for score(20) also.
Select query tab now
Choose expert mode check box
Paste your query in the text box
and Orderby clause in the orderby textbox
click on the test button to test it
raghu

BC4J - reverse generation - not all entities and views in same package

Hi
I want to use reverse generation, but separate all entity objects in package (my.entities) and View Object and view links in (my.views) not all in one package.
I can do this by generating entities first and then creating view objects and view links separately.
Can I do this in one step as we do if we want them in one package ?
Usama

Yes, you can. No one step can do all thing for me.

BC4J view objects on pipeline functions

Hello,
I just wanted to find out if we can place a BC4J view object on the new Oracle 9i Pipeline functions.
Thanks
Ramna

If it still looks on the outside like a database view to the JDBC client (BC4J in this case), then sure.
If you're making updates, then your underlying entity object will have to:
[list]
[*]Be mapped to an appropriate, updateable table, or
[*]Write INSTEAD OF triggers for your view
[list]
Let us know if you hit any problems.

Inserting a new row in a BC4J View Object with an attribute of type BFileDomain

Hi all,
I've to insert a row in a View Object with an attribute of type oracle.jbo.domain.BFileDomain.
I do this within an Application Module's method, which has an input parameter of type byte[]. This parameter will be the content of the BFILE.
What's the right way for doing that?
I've tried with the following code, but I've got an exception in committing the transaction:
public int serializeDocument(int codDomanda, int codSorgente, byte[] content, String est, int type, int cost, String title, String arg) throws JboException {
int code = 0;
//File f;
DocumentiTwoView = getDocumentiTwoView();
java.sql.Statement stmt = ((DBTransaction) getTransaction()).createStatement(1);
try {
Row docRow = DocumentiTwoView.createRow();
SequenceImpl seq = new SequenceImpl("documenti_seq", getDBTransaction());
Integer next = (Integer) seq.getData();
code = next.intValue();
docRow.setAttribute("Coddocumento", new Number(code));
docRow.setAttribute("Titolo", (String) title);
docRow.setAttribute("Argomento", (String) arg);
docRow.setAttribute("Costo", new Number(cost));
docRow.setAttribute("Tipo", new Number(type));
docRow.setAttribute("Coddomanda", new Number(codDomanda));
docRow.setAttribute("Codsorgente", new Number(codSorgente));
//f = new File("Doc" + code + "." + est)
BFILE src_lob = null;
ResultSet rset = null;
rset = stmt.executeQuery ("SELECT BFILENAME('DOC_DIR', 'Doc" + code + "." + est + "') FROM DUAL");
if (rset.next()) {
src_lob = ((OracleResultSet)rset).getBFILE(1);
BFileDomain bfd = new BFileDomain(src_lob);
bfd.setBytes(content);
bfd.saveToDatabase(getTransaction());
docRow.setAttribute("Contenuto", (BFileDomain) bfd);
catch (Exception ex) {
getTransaction().rollback();
throw new oracle.jbo.JboException("Impossibile creare il nuovo documento:\n" + ex.getMessage());
finally {
try {
stmt.close();
catch (Exception nex) {
try {
// Commit the whole transaction
getTransaction().commit();
catch (Exception e) {
e.printStackTrace();
getTransaction().rollback();
throw new JboException("Impossibile eseguire il commit della transazione:\n" + e.getMessage());
return code;
Thanks a lot in advance!
Christian
null

Odd, have you disabled caching and indirection? (NoIdentityMap, dontUseIndirection, or alwaysRefresh/disableCacheHits). If so, then this could be the issue.
Otherwise please include the sample code you use to perform this, and verify that you do not have any unusual code in your set/get methods or in descriptor events. Also turn TopLink logging on and include a sample. Also ensure that you do not modify your objects until after registering them in the unit of work, and only modify the unit of work clones.

Query in bc4j view object?

I am creating a vo based on employees table(hr demo schema) . It has managerid column , i want to display manager name instead of managerid. So in my view object i want
Employees : FirstNAme, Lastname, email and managername.
How to do a query like ' select firstname from employee where employeeid= 100' . (which is current employees managerid) in the vo.??
So that managerid gets converted to managername for each employee.

Dhiraj,
I would add the manager name and have the manager id as a hidden filed in your application. Set attribute property in display hints to display hide. This way the manager id is present but not shown.
Frank

BC4J: Question on bind variables and DML in view objects

Hello,
I have a view object with a bind variable in the WHERE clause of the underlying query. I'm curious about how the state of this bind variable affects the use of the view object for inserting, updating, etc., at various stages of the commit cycle (before posting changes, after posting changes, after commit).
Specifically, what happens in the following scenarios?
1. The bind variable is not bound (and the query has not been executed) and a row is inserted into the VO
2. The bind variable is set to some value and an inserted or updated row in the VO does not meet the criteria specified by the bind variable; the transaction is then committed
If there is a weblog entry, help file, or HOWTO somewhere, I'd welcome a link to it.
Thanks,
Alan

The variable would only come into play when the VO's query is executed. It can be executed implicitly -- for example, accessing the first() row if the query hasn't been executed yet -- or explicitly by a call to executeQuery().
By setting setMaxFetchSize(0) on your VO, no rows will be fetched and you can use the VO for insert only.

BC4J: problems creating view object with multiple entity objects

Hi,
I working with a view object which contains two entity objects with parent-child relationship like this:
ViewObject - ParentEntityObject - PId
PAttribute
CId (FK)
(- ParentChildAssociation)
- ChildEntityObject - CId
- CAttribute
The 'Read Only' and 'References' options are checked for the association in the view object.
I'm creating a new row using this view object. The parent object should be created new and the child object already exists in the database, so I'm setting only the attributes of the parent object (including foreign key).
After creating the row I display it in a jbo:DataTable and only those attributes coming from the parent object are displayed. The attributes of the child object are not set. After a commit all attributes appear.
The problem is, that I want to display the new row with all attributes to the users BEFORE they commit.
I tried to set the child attributes, but they are read only by definition and even when I unchecked the 'Read Only' option and set the attributes to 'Always Updateable' in the view object it is giving me
JBO-27008: Attribute set for CAttribute in view object ViewObject failed.
Is there a way to make all attributes of the child object visible in the view object without committing changes?
(JDev 9.0.2.822)
Any help would be appreciated.
Regards,
Christian

Once again the structure, sorry.
ViewObject
|-ParentEntityObject
..|-PId
..|-PAttribute
..|-CId (FK)
|-ParentChildAssociation
|-ChildEntityObject
..|-CId
..|-CAttribute
Christian

Issues in persisting dynamic entity and view objects using MDS

Hi All,
I'm trying to create dynamic entity and view objects per user session and to persist these objects throughout the session, I'm trying to use MDS configurations(either file or Database) in adf-config.xml.
I'm facing following two errors while trying to run the app module:
1. MDS error (MetadataNotFoundException): MDS-00013: no metadata found for metadata object "/model/DynamicEntityGenModuleOperations.xml"
2. oracle.mds.exception.ReadOnlyStoreException: MDS-01273: The operation on the resource /sessiondef/dynamic/DynamicDeptEntityDef.xml failed because source metadata store mapped to the namespace / DEFAULT is read only.
I've gone through the following links which talks about the cause of the issue, but still can't figure out the issue in the code or the config file. Please help if, someone has faced a similar issue.
[http://docs.oracle.com/cd/E28271_01/doc.1111/e25450/mds_trouble.htm#BABIAGBG |http://docs.oracle.com/cd/E28271_01/doc.1111/e25450/mds_trouble.htm#BABIAGBG ]
[http://docs.oracle.com/cd/E16162_01/core.1112/e22506/chapter_mds_messages.htm|http://docs.oracle.com/cd/E16162_01/core.1112/e22506/chapter_mds_messages.htm]
Attached is the code for dynamic entity/view object generation and corresponding adf-config.xml used.
///////////App Module Implementation Class/////////////////////////
public class DynamicEntityGenModuleImpl extends ApplicationModuleImpl implements DynamicEntityGenModule {
private static final String DYNAMIC_DETP_VO_INSTANCE = "DynamicDeptVO";
* This is the default constructor (do not remove).
public DynamicEntityGenModuleImpl() {
public ViewObjectImpl getDepartmentsView1() {
return (ViewObjectImpl) findViewObject("DynamicDeptVO");
public void buildDynamicDeptComp() {
ViewObject internalDynamicVO = findViewObject(DYNAMIC_DETP_VO_INSTANCE);
if (internalDynamicVO != null) {
System.out.println("OK VO exists, return Defn- " + internalDynamicVO.getDefFullName());
return;
EntityDefImpl deptEntDef = buildDeptEntitySessionDef();
ViewDefImpl viewDef = buildDeptViewSessionDef(deptEntDef);
addViewToPdefApplicationModule(viewDef);
private EntityDefImpl buildDeptEntitySessionDef() {
try {
EntityDefImpl entDef = new EntityDefImpl(oracle.jbo.server.EntityDefImpl.DEF_SCOPE_SESSION, "DynamicDeptEntityDef");
entDef.setFullName(entDef.getBasePackage() + ".dynamic." + entDef.getName());
entDef.setName(entDef.getName());
System.out.println("Application Module Path name: " + getDefFullName());
System.out.println("EntDef :" + entDef.getFileName() + " : " + entDef.getBasePackage() + ".dynamic." + entDef.getName());
entDef.setAliasName(entDef.getName());
entDef.setSource("DEPT");
entDef.setSourceType("table");
entDef.addAttribute("ID", "ID", Integer.class, true, false, true);
entDef.addAttribute("Name", "NAME", String.class, false, false, true);
entDef.addAttribute("Location", "LOCATION", Integer.class, false, false, true);
entDef.resolveDefObject();
entDef.registerSessionDefObject();
entDef.writeXMLContents();
entDef.saveXMLContents();
return entDef;
} catch (Exception ex) {
System.out.println(ex.getLocalizedMessage());
return null;
private ViewDefImpl buildDeptViewSessionDef(EntityDefImpl entityDef) {
try {
ViewDefImpl viewDef = new oracle.jbo.server.ViewDefImpl(oracle.jbo.server.ViewDefImpl.DEF_SCOPE_SESSION, "DynamicDeptViewDef");
viewDef.setFullName(viewDef.getBasePackage() + ".dynamic." + viewDef.getName());
System.out.println("ViewDef :" + viewDef.getFileName());
viewDef.setUseGlueCode(false);
viewDef.setIterMode(RowIterator.ITER_MODE_LAST_PAGE_FULL);
viewDef.setBindingStyle(SQLBuilder.BINDING_STYLE_ORACLE_NAME);
viewDef.setSelectClauseFlags(ViewDefImpl.CLAUSE_GENERATE_RT);
viewDef.setFromClauseFlags(ViewDefImpl.CLAUSE_GENERATE_RT);
viewDef.addEntityUsage("DynamicDeptUsage", entityDef.getFullName(), false, false);
viewDef.addAllEntityAttributes("DynamicDeptUsage");
viewDef.resolveDefObject();
viewDef.registerSessionDefObject();
viewDef.writeXMLContents();
viewDef.saveXMLContents();
return viewDef;
} catch (Exception ex) {
System.out.println(ex.getLocalizedMessage());
return null;
private void addViewToPdefApplicationModule(ViewDefImpl viewDef) {
oracle.jbo.server.PDefApplicationModule pDefAM = oracle.jbo.server.PDefApplicationModule.findDefObject(getDefFullName());
if (pDefAM == null) {
pDefAM = new oracle.jbo.server.PDefApplicationModule();
pDefAM.setFullName(getDefFullName());
pDefAM.setEditable(true);
pDefAM.createViewObject(DYNAMIC_DETP_VO_INSTANCE, viewDef.getFullName());
pDefAM.applyPersonalization(this);
pDefAM.writeXMLContents();
pDefAM.saveXMLContents();
////////adf-config.xml//////////////////////
<?xml version="1.0" encoding="windows-1252" ?>
<adf-config xmlns="http://xmlns.oracle.com/adf/config" xmlns:config="http://xmlns.oracle.com/bc4j/configuration" xmlns:adf="http://xmlns.oracle.com/adf/config/properties"
xmlns:sec="http://xmlns.oracle.com/adf/security/config">
<adf-adfm-config xmlns="http://xmlns.oracle.com/adfm/config">
<defaults useBindVarsForViewCriteriaLiterals="true"/>
<startup>
<amconfig-overrides>
<config:Database jbo.locking.mode="optimistic"/>
</amconfig-overrides>
</startup>
</adf-adfm-config>
<adf:adf-properties-child xmlns="http://xmlns.oracle.com/adf/config/properties">
<adf-property name="adfAppUID" value="TestDynamicEC-8827"/>
</adf:adf-properties-child>
<sec:adf-security-child xmlns="http://xmlns.oracle.com/adf/security/config">
<CredentialStoreContext credentialStoreClass="oracle.adf.share.security.providers.jps.CSFCredentialStore" credentialStoreLocation="../../src/META-INF/jps-config.xml"/>
</sec:adf-security-child>
<persistence-config>
<metadata-namespaces>
<namespace metadata-store-usage="mdsRepos" path="/sessiondef/"/>
<namespace path="/model/" metadata-store-usage="mdsRepos"/>
</metadata-namespaces>
<metadata-store-usages>
<metadata-store-usage default-cust-store="true" deploy-target="true" id="mdsRepos">
<metadata-store class-name="oracle.mds.persistence.stores.file.FileMetadataStore">
<property name="metadata-path" value="/tmp"/>

</metadata-store>
</metadata-store-usage>
</metadata-store-usages>
</persistence-config>
</adf-config>
//////////////////////////////////////////////////////////////////////////////////////////////////////////

Hi Frank,
I m trying to save entity and view object xml by calling writeXMLContents() and saveXMLContents() so that these objects can be retrieved using the xmls later on.
These methods internally use MDS configuration in adf-config.xml, which is creating the issue.
Please share your thoughts on resolving this or if, there is any other way of creating dynamic entity/view objects for db tables created at runtime.
Nik

BC4J: Override Views Object default package

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