derrickaw commented on code in PR #34411: URL: https://github.com/apache/beam/pull/34411#discussion_r2031414947
########## sdks/java/core/src/main/java/org/apache/beam/sdk/io/TFRecordReadSchemaTransformProvider.java: ########## @@ -0,0 +1,221 @@ +/* + * 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.io; + +import static org.apache.beam.sdk.util.Preconditions.checkArgumentNotNull; + +import com.google.auto.service.AutoService; +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import org.apache.beam.sdk.metrics.Counter; +import org.apache.beam.sdk.metrics.Metrics; +import org.apache.beam.sdk.schemas.NoSuchSchemaException; +import org.apache.beam.sdk.schemas.Schema; +import org.apache.beam.sdk.schemas.SchemaRegistry; +import org.apache.beam.sdk.schemas.transforms.SchemaTransform; +import org.apache.beam.sdk.schemas.transforms.SchemaTransformProvider; +import org.apache.beam.sdk.schemas.transforms.TypedSchemaTransformProvider; +import org.apache.beam.sdk.schemas.transforms.providers.ErrorHandling; +import org.apache.beam.sdk.transforms.DoFn; +import org.apache.beam.sdk.transforms.DoFn.ProcessElement; +import org.apache.beam.sdk.transforms.ParDo; +import org.apache.beam.sdk.transforms.SerializableFunction; +import org.apache.beam.sdk.transforms.SimpleFunction; +import org.apache.beam.sdk.values.PCollection; +import org.apache.beam.sdk.values.PCollectionRowTuple; +import org.apache.beam.sdk.values.PCollectionTuple; +import org.apache.beam.sdk.values.Row; +import org.apache.beam.sdk.values.TupleTag; +import org.apache.beam.sdk.values.TupleTagList; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@AutoService(SchemaTransformProvider.class) +public class TFRecordReadSchemaTransformProvider + extends TypedSchemaTransformProvider<TFRecordReadSchemaTransformConfiguration> { + private static final String IDENTIFIER = "beam:schematransform:org.apache.beam:tfrecord_read:v1"; + private static final String OUTPUT = "output"; + private static final String ERROR = "errors"; + public static final TupleTag<Row> OUTPUT_TAG = new TupleTag<Row>() {}; + public static final TupleTag<Row> ERROR_TAG = new TupleTag<Row>() {}; + private static final Logger LOG = + LoggerFactory.getLogger(TFRecordReadSchemaTransformProvider.class); + + /** Returns the expected class of the configuration. */ + @Override + protected Class<TFRecordReadSchemaTransformConfiguration> configurationClass() { + return TFRecordReadSchemaTransformConfiguration.class; + } + + /** Returns the expected {@link SchemaTransform} of the configuration. */ + @Override + protected SchemaTransform from(TFRecordReadSchemaTransformConfiguration configuration) { + return new TFRecordReadSchemaTransform(configuration); + } + + /** Implementation of the {@link TypedSchemaTransformProvider} identifier method. */ + @Override + public String identifier() { + return IDENTIFIER; + } + + /** + * Implementation of the {@link TypedSchemaTransformProvider} inputCollectionNames method. Since + * no input is expected, this returns an empty list. + */ + @Override + public List<String> inputCollectionNames() { + return Collections.emptyList(); + } + + /** Implementation of the {@link TypedSchemaTransformProvider} outputCollectionNames method. */ + @Override + public List<String> outputCollectionNames() { + return Arrays.asList(OUTPUT, ERROR); + } + + /** + * An implementation of {@link SchemaTransform} for TFRecord read jobs configured using {@link + * TFRecordReadSchemaTransformConfiguration}. + */ + static class TFRecordReadSchemaTransform extends SchemaTransform { + private final TFRecordReadSchemaTransformConfiguration configuration; + + TFRecordReadSchemaTransform(TFRecordReadSchemaTransformConfiguration configuration) { + this.configuration = configuration; + } + + public Row getConfigurationRow() { + try { + // To stay consistent with our SchemaTransform configuration naming conventions, + // we sort lexicographically + return SchemaRegistry.createDefault() + .getToRowFunction(TFRecordReadSchemaTransformConfiguration.class) + .apply(configuration) + .sorted() + .toSnakeCase(); + } catch (NoSuchSchemaException e) { + throw new RuntimeException(e); + } + } + + @Override + public PCollectionRowTuple expand(PCollectionRowTuple input) { + // Validate configuration parameters + configuration.validate(); + + TFRecordIO.Read readTransform = + TFRecordIO.read().withCompression(Compression.valueOf(configuration.getCompression())); + + String filePattern = configuration.getFilePattern(); + if (filePattern != null) { + readTransform = readTransform.from(filePattern); + } + if (!configuration.getValidate()) { + readTransform = readTransform.withoutValidation(); + } + + // Read TFRecord files into a PCollection of byte arrays. + PCollection<byte[]> tfRecordValues = input.getPipeline().apply(readTransform); + + // Define the schema for the row + Schema schema = Schema.of(Schema.Field.of("record", Schema.FieldType.BYTES)); Review Comment: updated, thanks -- This is an automated message from the Apache Git Service. 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