source: utilitiespy/tudelft/utilities/immutablelist/JoinedList.py@ 889

from typing import TypeVar, Generic, List
from tudelft.utilities.immutablelist.AbstractImmutableList import AbstractImmutableList
from tudelft.utilities.immutablelist.ImmutableList import ImmutableList

E = TypeVar('E')

class JoinedList(Generic[E], AbstractImmutableList[E]):
        '''
        Creates conjunction of lists. Eg Join of [1,2],[3,4],[5] -> [1,2,3,4,5]
        
        @param <E> type of the elements
        '''

        def __init__(self,  items: List[ImmutableList[E]]):
                self._lists = items.copy()
                self._size= sum([l.size() for l in items ] )


        #Override
        def get(self , index:int) ->E :
                remaining = index

                for list in self._lists:
                        s = list.size()
                        if remaining < s:
                                return list.get(remaining)
                        remaining = remaining-s
                raise IndexError("" + str(index))

        def With( self, list:ImmutableList[E]) -> "JoinedList[E]" :
                '''
                @param list the list to add
                @return new JoinedList with the given list added at end of existing
                        lists.
                '''
                newlists = self._lists.copy()
                newlists.append(list)
                return JoinedList(newlists)

        #Override
        def size(self) ->int:
                return self._size

        #@Override
        def __hash__(self):
                return hash( (self._size, tuple(self._lists)))

        #Override
        def __eq__(self, other):
                return isinstance(other, self.__class__) \
                        and self._lists == other._lists