| # |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| from itertools import chain |
| from typing import Set, List, Type |
| |
| from pywy.core.channel import (CH_T, ChannelDescriptor) |
| from pywy.operators.unary import FlatmapOperator |
| from pywy.platforms.python.operator.py_execution_operator import PyExecutionOperator |
| from pywy.platforms.commons.channels import ( |
| COMMONS_CALLABLE_CHANNEL_DESCRIPTOR, |
| CommonsCallableChannel |
| ) |
| from pywy.platforms.python.channels import ( |
| PyIteratorChannel, |
| PY_ITERATOR_CHANNEL_DESCRIPTOR, |
| ) |
| |
| |
| class PyFlatmapOperator(FlatmapOperator, PyExecutionOperator): |
| |
| def __init__(self, origin: FlatmapOperator = None): |
| fm_function = None if origin is None else origin.fm_function |
| super().__init__(fm_function) |
| |
| def execute(self, inputs: List[Type[CH_T]], outputs: List[Type[CH_T]]): |
| self.validate_channels(inputs, outputs) |
| udf = self.fm_function |
| if isinstance(inputs[0], PyIteratorChannel): |
| py_in_iter_channel: PyIteratorChannel = inputs[0] |
| py_out_iter_channel: PyIteratorChannel = outputs[0] |
| py_out_iter_channel.accept_iterable(chain.from_iterable(map(udf, py_in_iter_channel.provide_iterable()))) |
| elif isinstance(inputs[0], CommonsCallableChannel): |
| py_in_call_channel: CommonsCallableChannel = inputs[0] |
| py_out_call_channel: CommonsCallableChannel = outputs[0] |
| |
| def fm_func(iterator): |
| return chain.from_iterable(map(udf, iterator)) |
| |
| py_out_call_channel.accept_callable( |
| CommonsCallableChannel.concatenate( |
| fm_func, |
| py_in_call_channel.provide_callable() |
| ) |
| ) |
| else: |
| raise Exception("Channel Type does not supported") |
| |
| def get_input_channeldescriptors(self) -> Set[ChannelDescriptor]: |
| return {PY_ITERATOR_CHANNEL_DESCRIPTOR, COMMONS_CALLABLE_CHANNEL_DESCRIPTOR} |
| |
| def get_output_channeldescriptors(self) -> Set[ChannelDescriptor]: |
| return {PY_ITERATOR_CHANNEL_DESCRIPTOR, COMMONS_CALLABLE_CHANNEL_DESCRIPTOR} |