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[BEAM-14430] Adding a logical type support for Python callables to Ro…
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sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/logicaltypes/PythonCallable.java
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|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
| package org.apache.beam.sdk.schemas.logicaltypes; | ||
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| import org.apache.beam.sdk.annotations.Experimental; | ||
| import org.apache.beam.sdk.schemas.Schema; | ||
| import org.apache.beam.sdk.schemas.Schema.LogicalType; | ||
| import org.apache.beam.sdk.util.PythonCallableSource; | ||
| import org.checkerframework.checker.nullness.qual.NonNull; | ||
| import org.checkerframework.checker.nullness.qual.Nullable; | ||
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| /** A logical type for PythonCallableSource objects. */ | ||
| @Experimental(Experimental.Kind.SCHEMAS) | ||
| public class PythonCallable implements LogicalType<PythonCallableSource, String> { | ||
| public static final String IDENTIFIER = "beam:logical_type:python_callable:v1"; | ||
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| @Override | ||
| public String getIdentifier() { | ||
| return IDENTIFIER; | ||
| } | ||
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| @Override | ||
| public Schema.@Nullable FieldType getArgumentType() { | ||
| return null; | ||
| } | ||
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| @Override | ||
| public Schema.FieldType getBaseType() { | ||
| return Schema.FieldType.STRING; | ||
| } | ||
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| @Override | ||
| public @NonNull String toBaseType(@NonNull PythonCallableSource input) { | ||
| return input.getPythonCallableCode(); | ||
| } | ||
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| @Override | ||
| public @NonNull PythonCallableSource toInputType(@NonNull String base) { | ||
| return PythonCallableSource.of(base); | ||
| } | ||
| } |
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sdks/java/core/src/main/java/org/apache/beam/sdk/util/PythonCallableSource.java
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| /* | ||
| * 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. | ||
| */ | ||
| package org.apache.beam.sdk.util; | ||
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| import java.io.Serializable; | ||
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| /** | ||
| * A wrapper object storing a Python code that can be evaluated to Python callables in Python SDK. | ||
| */ | ||
| public class PythonCallableSource implements Serializable { | ||
| private final String pythonCallableCode; | ||
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| private PythonCallableSource(String pythonCallableCode) { | ||
| this.pythonCallableCode = pythonCallableCode; | ||
| } | ||
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| public static PythonCallableSource of(String pythonCallableCode) { | ||
| // TODO(BEAM-14457): check syntactic correctness of Python code if possible | ||
| return new PythonCallableSource(pythonCallableCode); | ||
| } | ||
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| public String getPythonCallableCode() { | ||
| return pythonCallableCode; | ||
| } | ||
| } |
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| # | ||
| # 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. | ||
| # | ||
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| """Python Callable utilities. | ||
| For internal use only; no backwards-compatibility guarantees. | ||
| """ | ||
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| class PythonCallableWithSource(object): | ||
| """Represents a Python callable object with source codes before evaluated. | ||
| Proxy object to Store a callable object with its string form (source code). | ||
| The string form is used when the object is encoded and transferred to foreign | ||
| SDKs (non-Python SDKs). | ||
| """ | ||
| def __init__(self, source): | ||
| # type: (str) -> None | ||
| self._source = source | ||
| self._callable = eval(source) # pylint: disable=eval-used | ||
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| def get_source(self): | ||
| # type: () -> str | ||
| return self._source | ||
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| def __call__(self, *args, **kwargs): | ||
| return self._callable(*args, **kwargs) |