def compose(*args: "SequenceTransfer"):
transfers = list(args)
if len(transfers) < 1:
raise SequenceTransferException(
'compose require at least two transfers')
first_transfer = transfers[0]
last_transfer = transfers[-1]
matches = []
for i, (sequence, _) in enumerate(first_transfer.matches):
tmp = sequence
for f in transfers:
tmp = f.apply(tmp)
if i > 0 and matches[-1][1] == tmp:
match = (Sequence.expand(matches[-1][0], sequence), tmp)
matches.pop()
matches.append(match)
else:
matches.append((sequence, tmp))
return SequenceTransfer(first_transfer.source, last_transfer.target,
matches)
def apply(self,
source_sequence: Sequence,
plugin: SequenceTransferPlugin = None) -> Sequence:
"""
:param source_sequence: any sub-sequence of the source
:param plugin: SequenceTransferPlugin instance
:return: transferred sub-sequence in the target
"""
if plugin is not None:
return plugin.apply(self, source_sequence)
source_sequence.raise_if_not_in(self._source)
if source_sequence.size == 0 and source_sequence.start == self._source.start:
return Sequence(
self._index[0].start,
self._index[0].start,
)
elif source_sequence.size == 0 and source_sequence.stop == self._source.stop:
return Sequence(
self._index[self._source.size - 1].stop,
self._index[self._source.size - 1].stop,
)
else:
return Sequence.expand(self._index[source_sequence.start],
self._index[source_sequence.stop - 1])
def apply(self, source_sequence: Sequence) -> Sequence:
"""
:param source_sequence: any sub-sequence of the source
:return: transferred sub-sequence in the target
"""
source_sequence.raise_if_not_in(self._source)
if source_sequence.size == 0 and source_sequence.start == self._source.start:
return Sequence(
self._index[0].start,
self._index[0].start,
)
elif source_sequence.size == 0 and source_sequence.stop == self._source.stop:
return Sequence(
self._index[self._source.size - 1].stop,
self._index[self._source.size - 1].stop,
)
else:
return Sequence.expand(self._index[source_sequence.start],
self._index[source_sequence.stop - 1])
