// author:		klaffenboeck patrick <patrick.k@rocketmail.com>
// matr.-nr:		0125335
// bsp.-nr:		4033
// datei:		ReNeX.java (REsistorNEtworkeXception)
// beschreibung:	die exception klasse fuer die klasse ReNe

 // for better readability try "sed '/ \/\//d' ...." ;-)

package Wider;

public class ReNeX extends Exception
{

 // die bedeutung der fehlercodes kann man leicht aus den
 // entsprechenden fehlermeldungen weiter unten erkennen
protected static final byte MISS_LBR = 1;
protected static final byte MISS_RBR = 2;
protected static final byte TWO_OPS = 3;
protected static final byte INV_POS = 4;
protected static final byte INV_CHAR = 5;
protected static final byte MIX_OP = 6;
protected static final byte FIND = 7;
protected static final byte NON_POS = 8;
protected static final byte EPROG = 9;

protected StringBuffer msg;
protected StringBuffer ptr;
protected boolean printPtr = true;

public ReNeX( byte type, int pos ) throws ReNeX
{
	super();

	msg = new StringBuffer("ERROR #" + type + ": ");
	ptr = new StringBuffer("");

	switch (type) {
		case MISS_LBR:	msg.append("missing matching left " +
					   "bracket");
				break;
		case TWO_OPS:	msg.append("two operators in sequence");
				break;
		case INV_CHAR:	msg.append("invalid character");
				break;
		case MISS_RBR:	msg.append("missing matching right " +
					   "bracket");
				break;
		case EPROG:	msg.append("eprog-restriction: no " +
					   "more than 15 resistors " +
					   "allowed");
				break;
		case MIX_OP:	msg.append("different levels have to " +
					   "be grouped by brackets");
				break;
		case INV_POS:	msg.append("invalid operator position");
				break;
		case FIND:	msg.append("Wider.ReNe.find() can " +
					   "only search for '+' or '/'");
				printPtr = false;
				break;
		case NON_POS:	msg.append("all resistors musst be 1 " +
					   "or greater");
				printPtr = false;
				break;
		default:	msg.append("unkown error");
				printPtr = false;
	}

	for (int i = 0; i < pos; i++) ptr.append(" ");
	ptr.append("^");
} // end constructor( byte, int )

public ReNeX( String input )
{
	super();

	msg = new StringBuffer("ERROR #255: unknown error in " +
			       "expression \"" + input + "\"");
	printPtr = false;
} // end constructor( String )

public void printMessage()
{
	if (printPtr) System.err.println(ptr);
	System.err.println(msg);
} // end void printMessage()

} // end class ReNeX