private boolean isEscape(char currentChar) throws IOException {
    	boolean isEscape = false;
    	if ( currentChar == '\\' ) {
    		char nextChar = peekChar();
	    	switch(nextChar) {
	    	case 't':
	    	case 'b':
	    	case 'n':
	    	case 'r':
	    	case 'f':
	    	case '\'':
	    	case '\"':
	    	case '\\':
	    		isEscape = true;
	    		break;
	    	default:
	    		isEscape = false;
	    	}
    	}

    	return isEscape;
    }