Bug 212505 Use default script ID to skip script debugging
In Dte side, when compile or evaluate java script, it would pass in a script source id. This kind of id is currenlty used by report script debugger. So to skip redundant processing for such kind of internal script evaluating, dte need pass in a default ID, which is defined as ScriptExpression.defaultID. If this id is already used for particular meaning and it can not pass in the default ID, we need define them as public constants and let script debugger check and skip them as well.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/script/NEvaluator.java
{
	private BasicCachedArray valueList; 
	private BasicCachedArray rowIdList;
	private int firstPassRowNumberCounter = 0;
	private int secondPassRowNumberCounter = 0;
	private int qualifiedRowCounter = 0;
	
	
	private int N = -1;
	
	
	private boolean n_percent = false;
	
	
	private IScriptExpression op_expr;
	 
	private IScriptExpression n_expr;
	
	private FilterPassController filterPassController;
	
	private String tempDir;
	/**
	 * Create a new instance to evaluate the top/bottom expression
	 * @param operator 
	 * @param op_expr operand expression
	 * @param n_expr expression to yield N