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import abc
from polymatrix.expression.utils.getvariableindices import get_variable_indices_from_variable
from polymatrix.polymatrix.init import init_poly_matrix
from polymatrix.expression.mixins.expressionbasemixin import ExpressionBaseMixin
from polymatrix.polymatrix.abc import PolyMatrix
from polymatrix.expressionstate.abc import ExpressionState
# to be deleted?
class ToSortedVariablesExprMixin(ExpressionBaseMixin):
@property
@abc.abstractmethod
def underlying(self) -> ExpressionBaseMixin:
...
# overwrites the abstract method of `ExpressionBaseMixin`
def apply(
self,
state: ExpressionState,
) -> tuple[ExpressionState, PolyMatrix]:
state, variable_indices = get_variable_indices_from_variable(state, self.underlying)
tagged_variable_index = tuple((offset, state.get_name_from_offset(offset)) for offset in variable_indices)
ordered_variable_index = tuple(v[0] for v in sorted(tagged_variable_index, key=lambda v: v[1]))
def gen_sorted_vector():
for row, index in enumerate(ordered_variable_index):
yield (row, 0), {((index, 1),): 1}
poly_matrix = init_poly_matrix(
terms=dict(gen_sorted_vector()),
shape=(len(variable_indices), 1),
)
return state, poly_matrix
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