Changed structure of cpl-query

src/cpl_query/base/sequence_values.py

@@ -0,0 +1,55 @@
+import io
+import itertools
+
+from cpl_query.exceptions import IndexOutOfRangeException
+
+
+class SequenceEnd:
+
+    def __init__(self):
+        self.is_ended = False
+
+    def set_end(self, value: bool) -> 'SequenceEnd':
+        self.is_ended = value
+        return self
+
+
+class SequenceValues:
+    def __init__(self, data, _t: type):
+        if data is None:
+            data = []
+
+        if not hasattr(data, '__iter__'):
+            raise TypeError(f'{type(self).__name__} must be instantiated with an iterable object')
+
+        self._data = []
+        for element in data:
+            if _t is not None and type(element) != _t and not isinstance(type(element), _t) and not issubclass(type(element), _t):
+                raise Exception(f'Unexpected type: {type(element)}\nExpected type: {_t}')
+            self._data.append(element)
+        self._index = 0
+        self._len = sum(1 for item in self._data)
+        self._cycle = itertools.cycle(self._data)
+
+    def __len__(self):
+        return self._len
+
+    def __iter__(self):
+        i = 0
+        while i < len(self):
+            yield next(self._cycle)
+            i += 1
+
+    def __next__(self):
+        if self._index >= len(self):
+            raise IndexOutOfRangeException()
+        self._index += 1
+
+        return self.next()
+
+    def next(self):
+        return next(self._cycle)
+
+    def reset(self):
+        self._index = 0
+        self._cycle = itertools.cycle(self._data)