from cis_interface.communication.FileComm import FileComm
from cis_interface.schema import register_component
[docs]@register_component
class PlyFileComm(FileComm):
r"""Class for handling I/O from/to a .ply file on disk.
Args:
name (str): The environment variable where communication address is
stored.
**kwargs: Additional keywords arguments are passed to parent class.
"""
_filetype = 'ply'
def _init_before_open(self, serializer_kwargs=None, **kwargs):
if serializer_kwargs is None:
serializer_kwargs = {}
serializer_kwargs.setdefault('stype', 8)
kwargs['serializer_kwargs'] = serializer_kwargs
super(PlyFileComm, self)._init_before_open(**kwargs)
self.read_meth = 'read'
if self.append:
self.append = 'ow'
def _send(self, msg):
r"""Write message to a file. Merging existing ply info as needed.
Args:
msg (bytes, str): Data to write to the file.
Returns:
bool: Success or failure of writing to the file.
"""
if (msg != self.eof_msg) and (self.fd.tell() != 0):
self.fd.seek(0)
msg_ply, header = self.serializer.deserialize(msg)
with open(self.current_address, 'rb') as fd:
old_ply, header = self.serializer.deserialize(fd.read())
old_ply.append(msg_ply)
new_msg = self.serializer.serialize(old_ply)
else:
new_msg = msg
return super(PlyFileComm, self)._send(new_msg)