AJAX autocomplete and table component

Question

I am struggling building a page that contains a AJAX autocomplete component a submit button and a table component to display the output.
My autocomplete component and submit button work fine when I use a statictextfield to display the output.
My table works fine when I use a dropdown component to provide the query parameter.
However when I change the dropdown to a autocomplete or the statictextfield to a table and adjust the code accordingly I keep getting errors.
I based mij app on the following turotials:
Ihttp://developers.sun.com/prodtech/javatools/jscreator/learning/tutorials/2/databoundcomponents.html
http://developers.sun.com/prodtech/javatools/jscreator/reference/techart/2/ajax_samples.html#3
The code of my autocomplete reads:
public void autoComplete1_complete(FacesContext context, String prefix, CompletionResult result)
// TODO: return your own list of items based on the prefix, like this:
// result.addItem(�Hello�);
// result.addItem(prefix.toUpperCase());
if(prefix == null || prefix.length() < 1) {
return;
String prefixLeadingCap = prefix.substring(0,1).toUpperCase() + prefix.substring(1) + �%�;
Try {
CachedRowSetX glosseRowSet = getSessionBean1().getGlosseRowSet();
glosseRowSet.setObject(1, prefixLeadingCap);
} catch(SQLException e) {
return;
glosseDataProvider.refresh();
if(!glosseDataProvider.cursorFirst()); {
return;
do {
String glosseName = (String)glosseDataProvider.getValue(�glosse.glossenaam�);
result.addItem(glosseName);
while(glosseDataProvider.cursorNext());
The SQL query it's based on:
SELECT ALL glosse.glossenaam
FROM glosse
WHERE glosse.glossenaam LIKE ?
The code of my submit button reads in combination with the statictextfield reads:
public String button1_action() {
try {
getSessionBean1().getGlossarRowSet().setObject(1, autoComplete1.getText));
glossaryDataProvider.refresh();
} catch(Exception e) {
error("Cannot switch to glosse " + glosseDataProvider.getValue("glosse.glossenaam"));
log("Cannot switch to glosse " + glosseDataProvider.getValue("glosse.glossenaam"), e);
if(!glosse.DataProvider.cursorFirst()) {
return null;
do {
String glosseVerklaring = (String)glossaryDataProvider.getValue("glossary.verklaring");
staticText1.setText(glosseVerklaring);
while(glosseDataProvider.cursorNext());
return null;
The SQL query I bound to my table component:
SELECT ALL glossary.idGlosse
glossary.glossenaam
glossary.verklaring
glossary.deskundigen
glossary.bron
FROM glossary
WHERE glossary.glossenaam =?
The only thing I can think of causing my problem is the code of the prerender() method.
For the dropdown I used the following code, which worked ok:
public void prerender() {
if (glossaryDD.getSelected() == null ) {
try {
glosseDataProvider.cursorFirst();
getSessionBean1().getGlossaryRowSet().setObject(1, glosseDataProvider.getValue("glosse.glossenaam"));
glossaryDataProvider.refresh();
} catch (Exception e) {
error("Cannot switch to glosse " + glosseDataProvider.getValue("glosse.glossenaam"));
log("Cannot switch to glosse " + glosseDataProvider.getValue("glosse.glossenaam"), e);
To have it work with an autocomplete textfield I replaced the if statement with:
if(autoComplete1.getText().equals("")) {...}
this causes a NullPointerException.
Leaving the if out and just coding the
try {}
catch() {}
resulted in a QLException and the reamrk: statement parameter 1 not set.
What did I overlook when coding this use case.
Kind regards,
Annet

Answer 1

Afters hours of coding and trying I finally got this part of my app working. However, I am not sure my solution is a robust one, what do you think:
Here's the code of the prerender() method that does the tric:
public void prerender() {
if (glossaryAutoComplete.getValue() == null ) {
try {
getSessionBean1().getGlossaryRowSet().setObject(1, "Aggression"));
glossaryDataProvider.refresh();
glossaryAutoComplete.setText("Aggression");
} catch (Exception e) {
error("Cannot switch to glosse " + glosseDataProvider.getValue("glosse.glossenaam"));
log("Cannot switch to glosse " + glosseDataProvider.getValue("glosse.glossenaam"), e);
First I can't overloolk the consequences of hard-coding "Default" in the prerender() method, everthing seems to work fine...
Second it doesn't seem to matter whether I use setValue("Default") or setText("Default"), to set the initial display value of the auto complete text field...
Third I really don't understand why hard coding works and the following code, especially the: glosseDataProvider.getValue("glosse.glossenaam") bit, doesn't
public void prerender() {
if (glossaryAutoComplete.getValue() == null ) {
try {
glosseDataProvider.cursorFirst();
getSessionBean1().getGlossaryRowSet().setObject(1, glosseDataProvider.getValue("glosse.glossenaam"));
glossaryDataProvider.refresh();
} catch (Exception e) {
error("Cannot switch to glosse " + glosseDataProvider.getValue("glosse.glossenaam"));
log("Cannot switch to glosse " + glosseDataProvider.getValue("glosse.glossenaam"), e);
Could anyone of you shed some light in this darkness?
Kind regards,
Annet