I'm using this class to Upload some files. I'm using smartGwt forms because
they have a nice look & feel. As you can see i'm using JSNI to add the
multiple attribute to the upload item. This works fine when i'm using one
Form for one View. But when i have more then one Form on the view i'm
getting an exception! All forms are initiated and added at the same time,
when i have more then one form!
public class GngsUploadForm extends DynamicForm {
private UploadItem uploadItem = new UploadItem();
private void initForm(final boolean multiple) {
this.setTarget("fileUploadiFrame");
this.setEncoding(Encoding.MULTIPART);
this.setAction(GWT.getModuleBaseURL() +"singleFileUploadServlet");
final String randomUploadItemName = Long.toString(new
Date().getTime());
uploadItem.setName(randomUploadItemName);
uploadItem.setTitle("File: ");
uploadItem.setRequired(true);
super.setFields(uploadItem);
Scheduler.get().scheduleDeferred(new Command(){
@Override
public void execute(){
if(!randomUploadItemName.equals("") && multiple) {
setMultiple(randomUploadItemName);
}
}
});
}
/**
*
*/
public GngsUploadForm(GngsUploadListener listener, boolean multiple) {
super();
initForm(multiple);
if(listener != null)
initComplete(listener);
}
/**
* @param jsObj
*/
public GngsUploadForm(JavaScriptObject jsObj, GngsUploadListener
listener, boolean multiple) {
super(jsObj);
initForm(multiple);
if(listener != null)
initComplete(listener);
}
@Override
public void setFields(FormItem... fields) {
FormItem[] newFields = new FormItem[fields.length+1];
newFields[0] = uploadItem;
for(int i = 1; i < fields.length+1; i++) {
newFields[i] = fields[i-1];
}
super.setFields(newFields);
}
/*
* if true the uploadItem is required
* if false the uploadItem is not required
* default: true
* @param
*/
public void setUploadFieldRequired(boolean uploadItemRequired) {
uploadItem.setRequired(false);
}
private native void initComplete(GngsUploadListener listener) /*-{
$wnd.uploadComplete = function (filename) {
[email protected]::uploadComplete(Ljava/lang/String;)(filename);
};
}-*/;
private native void setMultiple(String randomUploadItemName) /*-{
var newAttr= document.createAttribute('multiple');
newAttr.nodeValue='multiple';
$wnd.document.getElementsByName(randomUploadItemName)[0].setAttributeNode(newAttr);
}-*/;
}
Exception:
15:09:20.405 [ERROR] [gngs] Uncaught exception escaped
com.google.gwt.core.client.JavaScriptException: (TypeError):
$wnd.document.getElementsByName(randomUploadItemName)[0] is undefined
at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:248)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
....
i don't know why i'm getting this exception :( I hope someone can help me!
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