/**
 * Specifies that there was an error while the assembler
 * was loading the file
 */
public class AssemblerException extends Exception {

	private String message = "Assembler Exception";
	private int line = -1;

	/*  Constructors */
	public AssemblerException() {}
	public AssemblerException(String msg) { message = msg; }
	public AssemblerException(int lc) { line = lc; }
	public AssemblerException(String msg, int lc) {
		message = msg;
		line = lc;
	}

	/* Error Retrieval */
	/**
	 * Retrieves the message
	 */
	public String getMessage() 
		{ return message; }
	/**
	 * Retrives the line number if provided, -1 otherwise
	 */
	public int getLine() 
		{ return line; }

	public String toString() 
		{ return (line > -1) ? (message + "; Line No. " + line) : message; }
}