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from ctypes import c_int
from . import NGS
from .String import getNGSValue
from .ReadGroup import ReadGroup

# Iterates across a list of ReadGroups

class ReadGroupIterator(ReadGroup):
    def nextReadGroup(self):
        """Advance to first ReadGroup on initial invocation 
        Advance to next ReadGroup subsequently
        :returns: false if no more ReadGroups are available.
        :throws: ErrorMsg if more ReadGroups should be available, but could not be accessed.
        """
        return bool(getNGSValue(self, NGS.lib_manager.PY_NGS_ReadGroupIteratorNext, c_int))