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
{
	private static int MAX_N_VALUE = 1000000;
	private Object[] valueList; 
	private int[] rowIdList;
	private int firstPassRowNumberCounter = 0;
	private int secondPassRowNumberCounter = 0;
	private int qualifiedRowCounter = 0;
	private IExecutorHelper helper;
	
	private int N = -1;
	
	
	private boolean n_percent = false;
	
	
	private IScriptExpression op_expr;
	 
	private IScriptExpression n_expr;