Bug 204506 NPE block to create a aggregation builder including a argument such as Percentile function[0001]
Description: [Regression]NPE block to create a aggregation builder including a argument such as Percentile function[0001] Build number: 2.2.1.v20070924-1643 Steps to reproduce: 1, New a Sample Dataset from CUSTOMERS 2, New a table binding the dataset and group on COUNTRY 3, Drag a aggregation builder into the table 4, Specify the FUNCTION as Percentile, Data Field to dataSetRow["CUSTOMERNUMBER"], percentage to 0.5 and aggregate on Group1 5, Click OK to finish Expected result: The aggregation builder is created well Actual result: org.eclipse.birt.report.designer.core.runtime.GUIException: Caused by java.lang.NullPointerException occurs Error log: rg.eclipse.birt.report.designer.core.runtime.GUIException: Caused by java.lang.NullPointerException. at org.eclipse.birt.report.designer.core.runtime.GUIException.createGUIException(GUIException.java:76) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:169) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:150) at org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler.handle(ExceptionHandler.java:89) at org.eclipse.birt.report.designer.internal.ui.dialogs.DataColumnBindingDialog.okPressed(DataColumnBindingDialog.java:235)
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
return new IAggregationInfo[0];
		}
	}
	/**
	 * fill the cmbDataField with binding holder's bindings
	 */
	private void initDataFields( )
	{
		cmbDataField.setItems( getColumnBindings( ) );
		if ( binding != null && binding.getExpression( ) != null )
		{
			cmbDataField.setText( binding.getExpression( ) );
		}
	}
	private String[] getColumnBindings( )
	{
		List elementsList = DEUtil.getVisiableColumnBindingsList( getBindingHolder( ) );
		String[] bindings = new String[elementsList.size( )];
		for ( int i = 0; i < bindings.length; i++ )
		{
			bindings[i] = ( (ComputedColumnHandle) elementsList.get( i ) ).getName( );
		}
		return bindings;
	}
	private void initGroups( )
	{
		String[] groups = getGroups( );
		if ( groups.length > 0 )
		{
			cmbGroup.setItems( groups );