Bug 134662 An unfriendly message pop up when input a very large number in filter Top N
Description: May be Top N value should be less than 100000 but the error message to user is not friendly enough. Step to reproduce: 1.new a datasource and a dataset 2.in the dataset add a filter with top N 3.enter 3655566 in top n 4.click the "Preview Results" Actual result: An error message tell that "data.engine.InvalidTopBottomN100000" Expected result: It had better tell user the Top N's rage of the input
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/script/NEvaluator.java
instance.n_percent = true;
				break;
			default:
				assert false;		
				return null;
		}
		
		instance.op_expr = op_expr;
		instance.n_expr = n_expr;
		instance.filterPassController = filterPassController;
		instance.helper = helper;
		return instance;
	}
	
	
	/**
	 * Evaluate the given value
	 * @param value
	 * @param n
	 * @return
	 * @throws DataException
	 */
	public boolean evaluate( Context cx, Scriptable scope ) throws DataException
	{
		if( filterPassController.getForceReset() )
		{
			doReset();
			filterPassController.setForceReset( false );
		}