Commit is Not Working

Vaadin 6 / 7 / 8 Framework Data Binding
1

DB: Oracle

Below is my code which will be very similar to the code from Vaadin Address book tutorial - PersonForm.

While Performing Commit on the sqlcontainer, its not committing the change to the row back to the table. Please help me out in this, Vaadin should me very simple, I am missing something here.

Code:--------------------------------------------

import java.util.Arrays;
import java.util.List;

import com.example.db.INVColumnView;
import com.example.db.INVFieldFactory;
import com.example.invmgmt.InvmgmtApplication;
import com.vaadin.data.Item;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.Form;
import com.vaadin.ui.HorizontalLayout;

@SuppressWarnings(“serial”)
public class INVMainForm extends Form implements ClickListener {

private Button save = new Button("Save", (ClickListener) this);
private Button cancel = new Button("Cancel", (ClickListener) this);
private Button edit = new Button("Edit", (ClickListener) this);
private InvmgmtApplication app;

public INVMainForm(InvmgmtApplication app) {
	this.app = app;

	HorizontalLayout footer = new HorizontalLayout();
	footer.setSpacing(true);
	footer.addComponent(edit);
	footer.addComponent(save);
	footer.addComponent(cancel);
	footer.setVisible(false);

	setFooter(footer);
}

@Override
public void setItemDataSource(Item newDataSource) {
	if(newDataSource != null){

		List<Object> orderedProperties = Arrays.asList(INVColumnView.NATURAL_COL_ORDER_NEWFORM);
		super.setFormFieldFactory(new INVFieldFactory());
		super.setItemDataSource(newDataSource,orderedProperties);
		
		setWriteThrough(false);

		setReadOnly(true);
		getFooter().setVisible(true);
	}else{
		super.setItemDataSource(null);
		getFooter().setVisible(false);
	}
}

public void setReadOnly(boolean readOnly){
	super.setReadOnly(readOnly);
	save.setVisible(!readOnly);
	cancel.setVisible(!readOnly);
	edit.setVisible(readOnly);

}

public void buttonClick(ClickEvent event) {
	Button source = event.getButton();

	if(source == save){
		if(!isValid()){
			return;
		}
		commit();
		setReadOnly(true);
		app.showListView();
	}else if(source == cancel){
		discard();
		setReadOnly(true);
		app.showListView();
	}else if(source == edit){
		setReadOnly(false);
	}

}

}