50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
# Copyright 2013 Embrane, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# @author: Ivar Lazzaro, Embrane, Inc.
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class Operation(object):
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"""Defines a series of operations which shall be executed in order.
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the operations expected are procedures, return values are discarded
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"""
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def __init__(self, procedure, args=(), kwargs={}, nextop=None):
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self._procedure = procedure
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self.args = args[:]
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self.kwargs = dict(kwargs)
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self.nextop = nextop
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def execute(self):
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args = self.args
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self._procedure(*args, **self.kwargs)
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return self.nextop
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def execute_all(self):
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nextop = self.execute()
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while nextop:
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nextop = self.execute_all()
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def has_next(self):
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return self.nextop is not None
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def add_bottom_operation(self, operation):
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op = self
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while op.has_next():
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op = op.nextop
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op.nextop = operation
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