Selection listener

i have written a bean in the selection listener of an af:table... but this does not get called on pageload
I am refreshing a region which contains child records... based on the selection of a particular record in the af:table
How to call this one on pageload. after pageload when i select the master records it works well... but on pageload my method doesnt get called and all records are coming

Hi,
you can queue a SelectionListener from Java
SelectionListener selListener = new SelectionListener(...,...,...);
selListener.queue();So if you find a method that is invoked on page load (e.g. phaseListener on f:view) then this can be used
Frank

Similar Messages

Issue with Selection Listener when the table has only one row

Hi All ,
I have developed a table in which I am using Selection Listener to perform some task when any row is selected.
It is working fine when I have more than 1 row in the table, but when I have only one row in the table , the selection listener do not call the corresponding method in bean.
I understand that selection event will be raised only when the row is changed, but in the use case when only one row is there, what should be done to make the selection listener work ?
In the selection listener I have written code to make the selected row as current row , and perform the required task.
Please suggest a way out for this situation.
Thanks in advance.

Hi,
try removing this attr from table
selectedRowKeys="#{bindings.xxx_VO1.collectionModel.selectedRow}"

Custom Selection Listener not getting fired

I am using JDeveloper 11.1.1.4 and have been trying to follow the advice given in the ADF Code Corner example 68. The only difference in my application/project, is that I am trying to develop the master table on a page fragment with a task flow attached for the JSFF containing the detail table. My master table on the primary JSFF has a custom selection listener on it. When testing the deployed package--putting the primary task flow on a JSPX page, the tables are showing, but when I select a different row on the master table, the new row is highlighted but nothing happens to execute the custom listener. I am sure of this because I've added a System.out.println as the very first line in it and it doesn't put the message out. I am getting no errors on the weblogic logs. I looked on the client side's html output and can't see anything that would trigger that a change occurred to send back to the server. Any ideas (outside of upgrading to another version of Jdeveloper) would be greatly appreciated. I am not sure if providing any of my code would be of any help in this issue.

Thanks to all who responded. I have multiple rows showing in my master table and when I select a different row, I get no event that executes my method. I tried adding the "binding.itterator." to the EL for the SelectionListener and that didn't work either. Besides both the examples in the ADF Code Corner 23 and 68 show it just as "class.method" as I have it. A small snippet from my table is below:
          <af:table value="#{bindings.HOT_trans_sumVO1.collectionModel}"
                    var="row" rows="#{bindings.HOT_trans_sumVO1.rangeSize}"
                    emptyText="#{bindings.HOT_trans_sumVO1.viewable ? 'No data to display.' : 'Access Denied.'}"
                    fetchSize="#{bindings.HOT_trans_sumVO1.rangeSize}"
                    rowBandingInterval="0"
                    selectedRowKeys="#{bindings.HOT_trans_sumVO1.collectionModel.selectedRow}"
                    *selectionListener="#{HotTransSummBean.onTxnSummTblRowSelect}"*
                    rowSelection="single" id="txnsummtbl"
                    columnStretching="last" width="100%" autoHeightRows="5"
                    contentDelivery="whenAvailable" immediate="true"
                    clientComponent="true" first="0">Also note that I have this backing bean defined on the task flow as a requestScope as it is in the example 68--example 23 does not state a scope level. Again, my method starts out with an output statement that never gets executed:
    public void onTxnSummTblRowSelect(SelectionEvent selectionEvent) {
      System.out.println("Entered onTxnSummTblRowSelect method.");

Creating a generic selection listener for af:table

Hi,
I'm using JDeveloper 11.1.1.5.0, and I have a simple requirement to set up a custom selection listener for an af:table component.
So far, I was doing this by using a custom function to invoke the EL to perform the makeCurrent operation. However, I came across Frank Nimphius' PDF on how to build a generic selection listener, and this seemed like a better way to go about it. The problem is, the CollectionModel class used in the sample code is now deprecated. Is anyone aware of the currently supported way to implement a generic selection listener?
Thanks,
Gill

this snap shot of the code i write it to get the current employee id whcich is selected
    public void select(SelectionEvent selectionEvent) {
        // Add event code here...
         RichTable _table = (RichTable)selectionEvent.getSource();
         CollectionModel _tableModel = (CollectionModel)((RichTable)selectionEvent.getSource()).getValue();
        JUCtrlHierBinding _adfTableBinding = (JUCtrlHierBinding)_tableModel.getWrappedData();
        DCIteratorBinding _tableIteratorBinding = _adfTableBinding.getDCIteratorBinding();
        //Acess the ADF iterator binding that is used with ADF table binding
        Object _selectedRowData = _table.getSelectedRowData();
        JUCtrlHierNodeBinding _nodeBinding =
            (JUCtrlHierNodeBinding)_selectedRowData; //get the row key from the node binding and set it //as the current row in the iterator
          Key _rwKey = _nodeBinding.getRowKey();
          _tableIteratorBinding.setCurrentRowWithKey( _rwKey.toStringFormat(true));
        DCIteratorBinding it = _adfTableBinding.getDCIteratorBinding();
       System.out.println( it.getCurrentRow().getAttribute("EmployeeId"));
    }this code i written 11.1.2

Can't get child node in tree selection listener

I am making a fusion web application using JDeveloper 11G (11.1.1.2.0).
I have created two view objects linked together. Let's call them VoDepartments and VoEmployees, linked on DepartmentId.
I hava made a tree with a af:switcher
<af:switcher id="s1" facetName="#{node.hierType.structureDefName}">
<f:facet name="view.VoDepartments">
<af:outputText value="#{node}" id="ot1"/>
</f:facet>
<f:facet name="view.VoEmployees">
<af:outputText value="#{node}" id="ot2"/>
</f:facet>
</af:switcher>I made a selection listener based on a guide by Frank Nimphius
RichTree tree1 = (RichTree) selectionEvent.getSource();
RowKeySet rks2 = selectionEvent.getAddedSet();
Iterator rksIterator = rks2.iterator();
if (rksIterator.hasNext()){
List key = (List)rksIterator.next();
JUCtrlHierBinding treeBinding = null;
treeBinding = (JUCtrlHierBinding) ((CollectionModel)tree1.getValue()).getWrappedData();
JUCtrlHierNodeBinding nodeBinding = nodeBinding = treeBinding.findNodeByKeyPath(key);
String nodeStuctureDefname = nodeBinding.getHierTypeBinding().getStructureDefName(); //Here is the nullpointerexception for employees
String employees = "view.VoEmployees";
String departments = "view.VoDepartments";
if (nodeStuctureDefname.equalsIgnoreCase(departments)){
   String dept = (String) nodeBinding.getAttribute("Department_name");
   System.out.println("Department = "+dept);
else if (nodeStuctureDefname.equalsIgnoreCase(employees)){
   String emp = (String) nodeBinding.getAttribute("First_name");
   System.out.println("Employee = "+emp);
else{
   //what the heck did the user click on? Ask him ;-)
}Pagedef:
Executables:
<iterator Binds="VoDepartments2" RangeSize="25" DataControl="AppMainDataControl" id="VoDepartments2Iterator"/>
Bindings:
<tree IterBinding="VoDepartments2Iterator" id="VoDepartments2">
<nodeDefinition DefName="view.VoDepartments" Name="VoDepartments20">
<AttrNames>
   <Item Value="DepartmentId"/>
</AttrNames>
<Accessors>
   <Item Value="VoEmployees"/>
</Accessors>
</nodeDefinition>
<nodeDefinition DefName="view.VoEmployees2" Name="VoDepartments21">
<AttrNames>
   <Item Value="First_name"/>
   <Item Value="Last_name"/>
</AttrNames>
</nodeDefinition>
</tree>The tree works just fine and list all it should list. I can click the department and my selection listener print the departments name in the console.
I can expand a department and list all employees. The problems is when I click an employee, I get null pointer exception.
I have found out that the selectin listener can't find nodeBiding for employees. So nodeBinding.getHierTypeBinding().getStructureDefName(); throw NullpointerException.
Anyone have an idea of what's wrong? Please help.
-Thomas
Edited by: Thomas H on Mar 22, 2010 8:21 AM

Hi,
if you open the tree binding editor, it has an entry "Target Data Source" for each of the node levels that you can use and point to an iterator binding representing the node. Not sure if this solves the issue, but chaces are.
1. create an iterator for a child VO (using the not dependent child VO instance)
2. Edit Target Data Source for the binding to e.g. ${bindings.EmployeesView1Iterator}
Frank

Problem getting the Table Data with the selection listener

Hi All,
I am working on a tree and table components. I wrote a logic in the backing bean in such a way that when I expand a node the child nodes for the tree are getting added dynamically and also getting the data in the table for the node expanded in the tree using the same Toplink Query . I added the selection listener for the table and when I am selecting a row in the table I am getting the Null Pointer Exception as the RowKeySet Value for the row selected is coming null.
Can any one please help me out with this problem
I will be very thankful
Regards,
Madhavi.

Hi All,
I am working on a tree and table components. I wrote a logic in the backing bean in such a way that when I expand a node the child nodes for the tree are getting added dynamically and also getting the data in the table for the node expanded in the tree using the same Toplink Query . I added the selection listener for the table and when I am selecting a row in the table I am getting the Null Pointer Exception as the RowKeySet Value for the row selected is coming null.
Can any one please help me out with this problem
I will be very thankful
Regards,
Madhavi.

Adding selection listener

How do I add a Selection listener to the cancel button in a Windows file open window??

Are you using FileDialog or JFileChooser?

Tree selection listener problem

I have a JTree which uses a selection listener.
I encounter a problem when I collapse a row while a leaf has focus.
My program doesn't hang but so many error messages scroll up my prompt.
How can I resolve this problem?
Thanks!

try to capture the error messages. If you are unable to get them from standard output, try redirecting to a file like:
prompt>java samp > xwhere samp is your class file and x is the file your output is redirected to. After you collapse the leaf that has focus, close the application and open the file 'x'. Copy and paste the errors here.
I'll see what I can do!

TreeTable Selection Listener Issue

I have a treeTable and i have used custom selection Listener instead of using bindings.<viewObject>.treeModel.makeCurrent. since i had to do more than just makeCurrent on selection, i choose this approach. Everything is working except, when i refresh the treeTable after create, the activeRow will be first row but selection shows on where i have last selected.
My custom selectionListener is working very fine but i have noticed that when i refresh treeTable selectionListener is never called. but only called when i make selection... Is there anyway i can get my custom selectionListener be called on refresh of treetable or is there any other way i can control selection on fresh of treeTable.
It will be highly appreciated if you can suggest me way.
Thanks

Thanks Timo for the reply. I have a customization to select the second row of the tree table by default. I am customizing the 'selectedRowKeys' value to achieve this default selection. It works fine for the first time.
In the below scenario it's is not working,
1. Select a row other than default selected
2. After some action i am refreshing the table, now the focus(highlight) is on the previous selected row but actually the selectedkey is second row(Scenario1)
This my tree table structure,
Revision 0
- - - - Scenario1
- - - - Scenario2
- - - - Scenario3
Revision 1
- - - - Scenario 4
- - - - Scenario 5
- - - - Scenario 6
Thanks,
Nagesh

Getting NullPointerException in ADF form using Custom Selection Listener

Hi,
I am getting NullPointerException from getRowKey() in GenericTableSelectionHandler.java while pressing "Page Down" key or continuous pressing of "Down Arrow" key in Read Only ADF form (Query, Sort Enabled) using Custom Selection Listener.
I have used the custom selection listener as mentioned at http://www.oracle.com/technetwork/developer-tools/adf/learnmore/23-generic-table-selection-listener-169162.pdf
The requirement to use custom Selection Listener to populate some fields from the selected row.
J Developer Version: 11.1.1.4.0
The error is as below
+<LifecycleImpl> <_handleException> ADF_FACES-60098:Faces lifecycle receives unhandled exceptions in phase INVOKE_APPLICATION 5+
javax.el.ELException: java.lang.NullPointerException
+     at com.sun.el.parser.AstValue.invoke(Unknown Source)+
+     at com.sun.el.MethodExpressionImpl.invoke(Unknown Source)+
+     at org.apache.myfaces.trinidad.component.UIXComponentBase.broadcastToMethodExpression(UIXComponentBase.java:1300)+
+     at org.apache.myfaces.trinidad.component.UIXTable.broadcast(UIXTable.java:268)+
+     at oracle.adf.view.rich.component.UIXTable.broadcast(UIXTable.java:144)+
+     at oracle.adf.view.rich.component.rich.data.RichTable.broadcast(RichTable.java:402)+
+     at org.apache.myfaces.trinidad.component.UIXCollection.broadcast(UIXCollection.java:148)+
+     at org.apache.myfaces.trinidad.component.UIXTable.broadcast(UIXTable.java:271)+
+     at oracle.adf.view.rich.component.UIXTable.broadcast(UIXTable.java:144)+
+     at oracle.adf.view.rich.component.rich.data.RichTable.broadcast(RichTable.java:402)+
+     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent$1.run(ContextSwitchingComponent.java:92)+
+     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent._processPhase(ContextSwitchingComponent.java:361)+
+     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.broadcast(ContextSwitchingComponent.java:96)+
+     at oracle.adf.view.rich.component.fragment.UIXInclude.broadcast(UIXInclude.java:102)+
+     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent$1.run(ContextSwitchingComponent.java:92)+
+     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent._processPhase(ContextSwitchingComponent.java:361)+
+     at oracle.adf.view.rich.component.fragment.ContextSwitchingComponent.broadcast(ContextSwitchingComponent.java:96)+
+     at oracle.adf.view.rich.component.fragment.UIXInclude.broadcast(UIXInclude.java:96)+
+     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.broadcastEvents(LifecycleImpl.java:879)+
+     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:312)+
+     at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:185)+
+     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265)+
+     at weblogic.servlet.internal.StubSecurityHelper$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:205)+
+     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)+
+     at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:106)+
+     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:446)+
+     at oracle.adfinternal.view.faces.activedata.AdsFilter.doFilter(AdsFilter.java:60)+
+     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:446)+
+     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:271)+
+     at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:177)+
+     at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)+
+     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)+
+     at oracle.adf.library.webapp.LibraryFilter.doFilter(LibraryFilter.java:175)+
+     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)+
+     at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:111)+
+     at java.security.AccessController.doPrivileged(Native Method)+
+     at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)+
+     at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)+
+     at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)+
+     at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)+
+     at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)+
+     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)+
+     at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:136)+
+     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)+
+     at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)+
+     at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)+
+     at weblogic.servlet.internal.WebAppServletContext$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:207)+
+     at weblogic.work.ExecuteThread.run(ExecuteThread.java:176)+
Caused by: java.lang.NullPointerException
+     at ibm.view.GenericTableSelectionHandler.makeCurrent(GenericTableSelectionHandler.java:48)+
+     at ibm.view.backing.Testpage.XxSelectListener(Testpage.java:207)+
+     at sun.reflect.GeneratedMethodAccessor355.invoke(Unknown Source)+
+     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)+
+     at java.lang.reflect.Method.invoke(Method.java:597)+
+     ... 60 more+
The table structure is as below for your reference
+<af:table value="#{bindings.TestTableAdfView1.collectionModel}"+
var="row"
+rows="#{bindings.TestTableAdfView1.rangeSize}"+
+emptyText="#{bindings.TestTableAdfView1.viewable ? 'No data to display.' : 'Access Denied.'}"+
+fetchSize="#{bindings.TestTableAdfView1.rangeSize}"+
+rowBandingInterval="0"+
+filterModel="#{bindings.TestTableAdfView1Query.queryDescriptor}"+
+queryListener="#{bindings.TestTableAdfView1Query.processQuery}"+
+filterVisible="true" varStatus="vs"+
+rowSelection="single"+
+binding="#{backingBeanScope.backing_testpage.t1}"+
+id="t1"+
+selectionListener="#{backingBeanScope.backing_testpage.XxSelectListener}">+
Any help to resolve the issue is highly appreciated.
Thanks,
Arijit
Edited by: user10570755 on Aug 2, 2011 11:19 PM

//selection with the selection in the ADF model Object
_selectedRowData = _table.getSelectedRowData();
//cast to JUCtrlHierNodeBinding, which is the ADF object //that represents a row
JUCtrlHierNodeBinding _nodeBinding = (JUCtrlHierNodeBinding) _selectedRowData;
//get the row key from the node binding and set it //as the current row in the iterator
Key _rwKey = _nodeBinding.getRowKey();i guess nodeBinding becoming null here.. _table.getSelectedRowData().. is not returnign anything

Af:Table retains rows selected and selection listener doesnt work

Hi
I have a table with a list of objects passed to it to be rendered. When the user selects an object and clicks on the launch button above the table, it launches a new page and on the new page when the user clicks on cancel it brings back to the same page where the table is present. While coming back to this page, the row that was earlier selected by the user is highlighted and a click on the same row doesnt enable the selection listener. I have to click on some other row and then click the old row if I want to relaunch the old page
<af:table var="row" rowBandingInterval="0" id="tblProcedures" emptyText="#{dbProcedureMsg.TABLE_EMPTY_TEXT}"
summary="#{dbProcedureMsg.TABLE_SUMMARY_TEXT}"
value="#{pageFlowScope.db_provisioning_DeploymentProcedurePageModel.collectionModel}" filterVisible="false"
columnStretching="column:colDescription" rowSelection="single" width="99.7%"
selectionListener="#{pageFlowScope.db_provisioning_DeploymentProcedurePageModel.processSelection}">
There is one more table which behaves the same way. But other tables which are part of my application work correctly.
Any idea on what I might be doing wrong ?
Thanks in advance

Hi,
To be honest Million rows in excel its questionable for me
I would try to find alternate solution rather than killing ADF on client and then your DBA will call you for a urgent meeting. Even if you make it work with ADF, people will not going use it due to huge amount of data load.
What you can do is to call external report like Jasper, BIRT etc. etc. and provide option there to export to Excel based on your criteria (but million rows is again questionable)
OR
one idea is to give option at client side to request a report with button at af:TABLE toolbar ...then you can schedule a job at database server level using PL/SQL dbms_scheduler package with OS script to generate text file on server and FTP it to some machine.
Hope it help,
ZB

Tree - Selection listener

I have a af:tree on Dynamic tab shell, in that tree I have a selection listener property, Let us consider three nodes on the tree, Link1, Link2, Link3.
When I hit the Link1 means Taskflow 1 renders on the right side, same as hitting Link2 means Taskflow2 renders.
I can close the taskflow by using launchActivity.
My problem is, I can hit the Link1 which renders TaskFlow1, Now i am closing the taskflow, again i am hitting Link1 without refreshing, the corresponding Taskflow is not opening.
Once i refresh i can open the link1 again.
Please help me to come across it.
Thanks.
-Arunkumar Kootharasan
Edited by: Arunkumar Kootharasan on Oct 11, 2012 6:45 PM

hi,
Thanks for your reply,
"What does this mean ? Why don't you use dynamic regions to switch between task flows in which case a task flow is closed when you switch to another one exposed in the region"
"This is what i meant launchActivity means"- below code snippet
private void launchActivity(String title, String taskflowId, boolean newTab)
try
TabContext tabContext = TabContext.getCurrentInstance();
int tabIndex = tabContext.getSelectedTabIndex();
System.out.println("selected :" +tabIndex);
if (tabIndex != -1)
System.out.println("Tab Removed");
tabContext.removeTab(tabIndex);
System.out.println("selected has:" +tabIndex);
TabContext.getCurrentInstance().addOrSelectTab(title,taskflowId);
catch (TabContext.TabOverflowException toe)
// causes a dialog to be displayed to the user saying that there are
// too many tabs open - the new tab will not be opened...
toe.handleDefault();
" Why don't you use dynamic regions to switch between task flows in which case a task flow is closed when you switch to another one exposed in the region"
Yes i'm using Dynamic region. I forget to say this, and i also switching between one to another regions .
"What does "without refreshing" mean? If you just exit the task flow without showing a new one then you will have to refresh the region and ensure its re-instantiating the task flow"
Without refreshing in the sense manually refreshing the browser. If i manually refresh means its working fine.
So, Without manually refreshing the browser, i want to refresh the region.
How can i achieve it?
-Arun

JPopupMenu selection listener

Hello,
I need to get a notification when the user hovers the mouse over the menu items of a popup menu, so that I could display some help in the status bar.
I also have to do this for a JComboBox.
Do you have any ideas? I can not find a proper listener. I thought that the PopupMenuListener will do the job but is very limited.
It there a way to do this? Or did anyone put this as a RFE?
Thank you!

You'd still have to add a "selection listener" instance to every component you want to know about, just like you would with a mouse listener. In fact, you can very simply make one:
public class SelectionListener extends MouseAdapter {
   private HashMap map = new HashMap();
   private StatusComponent status = null;
   public SelectionListener(StatusComponent sc) {
      status = sc;
   public void addComponent(Component c, String msg) {
      c.addMouseListener(this);
      map.put(c, msg);
   public void mouseEntered(MouseEvent e) {
      String msg = map.get(e.getSource());
      if(msg != null) { status.setStatus(msg); }
   public void mouseExited(MouseEvent e) {
      status.clearStatus();
}I'll leave it to you to create a StatusComponent class and figure out how to use this.

Select Listener Port Number from which_table?

I'm writing a SQL script that, among other things, disconnects from Oracle and then reconnects to the same instance as a different user. I'm able to query v$database and v$instance to get most of the information I need (host, service name, etc) for the reconnect part. The only part I'm missing is the listener port number. I could hard code it to 1521, but that isn't very flexible. Currently, I'm prompting the user (which is normally me) for the listener port number in the SQL script, but that just seems a little bit lame. So my question is this: is there a view or table somewhere in the sys schema that I could use to view the listener configuration? I'm mostly working with 10gR2+ databases.

cleavitt wrote:
That is possible, but it needs to be a standard Oracle configuration if the script is to remain generic and portable. The script is actually working fine as-is. I was just trying to go the extra mile and determine the port number automatically. I could also prompt for a TNSNames entry as suggested by others, but I don't always have an entry defined for all of the Oracle instances in my company on every workstation that I work from.
Here is the script for anyone that is interested. It started out as a script that I found online, but the original did not work with 11g case-sensitive passwords and it only worked for local connections on the server.
Description:
Allows a DBA user to impersonate another user (without knowing the user's password).
Similar in function to using the SU command in Unix/Linux.
Note:
This script temporarily changes the impersonated user's password and may cause other
connection attempts by that user to fail during the moment that the temporary password is in effect.
WHENEVER SQLERROR EXIT
SET VERIFY OFF
ACCEPT username CHAR PROMPT 'Enter the username: '
ACCEPT listenerport NUMBER DEFAULT 1521 PROMPT 'Enter the listener port [1521]: '
-- Define substitution variables and column mapping.
COLUMN username NEW_VALUE username
COLUMN password_hash NEW_VALUE password_hash
COLUMN host_name NEW_VALUE hostname
COLUMN instance_name NEW_VALUE servicename
-- Populate substitution variables.
SELECT
name AS username,
-- Get the user's password hash(s) and apply appropriate formatting for case-sensitive password if needed (11g+ passwords).
NVL2(spare4, spare4 || ';' || password /* 11g+ */, password /* pre-11g */) AS password_hash
FROM sys.user$
WHERE name = UPPER('&username');
SELECT host_name, instance_name
FROM v$instance;
-- Set the user's password to a temporary value.
ALTER USER &username IDENTIFIED BY TempPass;
-- Use the temporary password to connect to the database as the user.
CONNECT &username/TempPass@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=&hostname)(PORT=&listenerport))(CONNECT_DATA=(UR=A)(SID=&servicename)));
-- Reset the user's password to the original value using the original password hash(s).
ALTER USER &username IDENTIFIED BY VALUES '&password_hash';
SHOW USER
UNDEFINE username
UNDEFINE password_hash
UNDEFINE hostname
UNDEFINE servicename
UNDEFINE listenerport
WHENEVER SQLERROR CONTINUE
SET VERIFY ONAnd by so doing you just kicked the user's password expiration on down the road, negating the benefit of havng a password expiration.
Also, you locked out the legitimate user of this account, until such time as you reset it back to the original. And in the mean time, if this happens to be an account used by some automated process, that process doesn't know the new "temporary" password and runs a risk of locking the account from too many invalid connection attempts. Try to become SYSMAN or DBSNMP from this, and you will very quickly kill OEM.
This has "bad idea" written all over it. What problem is it supposed to be be solving?

JList Selection Listener

How can i add a listener to a JList so that it runs a method when the selection has changed? I have already looked at the tutorial but it seems to be over complicated for what i need.
I have tried:
addFinanceList.addListSelectionListener(new ListSelectionListener()
public void valueChanged(ListSelectionEvent event)
CP.getFinance().loadFinance((String)addFinanceList.getSelectedValue());
updateDisplay();
But this never executes.
Can anyone help?

Sure it never executes? If you select items in the
list, what you've written looks correct. I'd shove a
println or log message in the valueChanged method to
see what's happening.Tried that...still nothing happens!

Selection listener

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