[BEAM-14035] Convert BigQuery SchemaIO to SchemaTransform

sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/transforms/TypedSchemaTransformProvider.java

@@ -42,13 +42,13 @@
 @Experimental(Kind.SCHEMAS)
 public abstract class TypedSchemaTransformProvider<ConfigT> implements SchemaTransformProvider {
 
-  abstract Class<ConfigT> configurationClass();
+  protected abstract Class<ConfigT> configurationClass();
 
   /**
    * Produce a SchemaTransform from ConfigT. Can throw a {@link InvalidConfigurationException} or a
    * {@link InvalidSchemaException}.
    */
-  abstract SchemaTransform from(ConfigT configuration);
+  protected abstract SchemaTransform from(ConfigT configuration);
 
   /**
    * List the dependencies needed for this transform. Jars from classpath are used by default when

sdks/java/core/src/test/java/org/apache/beam/sdk/schemas/transforms/TypedSchemaTransformProviderTest.java

@@ -63,7 +63,7 @@ public String identifier() {
     }
 
     @Override
-    Class<Configuration> configurationClass() {
+    protected Class<Configuration> configurationClass() {
       return Configuration.class;
     }
 

sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaTransformReadConfiguration.java

@@ -0,0 +1,100 @@
+/*
+ * 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.gcp.bigquery;
+
+import com.google.auto.value.AutoValue;
+import javax.annotation.Nullable;
+import org.apache.beam.sdk.schemas.AutoValueSchema;
+import org.apache.beam.sdk.schemas.annotations.DefaultSchema;
+import org.apache.beam.sdk.transforms.SerializableFunction;
+import org.apache.beam.sdk.values.Row;
+import org.apache.beam.sdk.values.TypeDescriptor;
+
+/**
+ * Configuration for reading from BigQuery.
+ *
+ * <p>This class is meant to be used with {@link BigQuerySchemaTransformReadProvider}.
+ *
+ * <p><b>Internal only:</b> This class is actively being worked on, and it will likely change. We
+ * provide no backwards compatibility guarantees, and it should not be implemented outside the Beam
+ * repository.
+ */
+@SuppressWarnings({
+  "nullness" // TODO(https://issues.apache.org/jira/browse/BEAM-10402)
+})
+@DefaultSchema(AutoValueSchema.class)
+@AutoValue
+public abstract class BigQuerySchemaTransformReadConfiguration {
+
+  /** Instantiates a {@link BigQuerySchemaTransformReadConfiguration.Builder}. */
+  public static Builder builder() {
+    return new AutoValue_BigQuerySchemaTransformReadConfiguration.Builder();
+  }
+
+  private static final AutoValueSchema AUTO_VALUE_SCHEMA = new AutoValueSchema();
+  private static final TypeDescriptor<BigQuerySchemaTransformReadConfiguration> TYPE_DESCRIPTOR =
+      TypeDescriptor.of(BigQuerySchemaTransformReadConfiguration.class);
+  private static final SerializableFunction<BigQuerySchemaTransformReadConfiguration, Row>
+      ROW_SERIALIZABLE_FUNCTION = AUTO_VALUE_SCHEMA.toRowFunction(TYPE_DESCRIPTOR);
+
+  /** Serializes configuration to a {@link Row}. */
+  Row toBeamRow() {
+    return ROW_SERIALIZABLE_FUNCTION.apply(this);
+  }
+
+  /** Configures the BigQuery read job with the SQL query. */
+  @Nullable
+  public abstract String getQuery();
+
+  /**
+   * Specifies a table for a BigQuery read job. See {@link BigQueryIO.TypedRead#from(String)} for
+   * more details on the expected format.
+   */
+  @Nullable
+  public abstract String getTableSpec();
+
+  /** BigQuery geographic location where the query job will be executed. */
+  @Nullable
+  public abstract String getQueryLocation();
+
+  /** Enables BigQuery's Standard SQL dialect when reading from a query. */
+  @Nullable
+  public abstract Boolean getUseStandardSql();
+
+  @AutoValue.Builder
+  public abstract static class Builder {
+
+    /** Configures the BigQuery read job with the SQL query. */
+    public abstract Builder setQuery(String value);
+
+    /**
+     * Specifies a table for a BigQuery read job. See {@link BigQueryIO.TypedRead#from(String)} for
+     * more details on the expected format.
+     */
+    public abstract Builder setTableSpec(String value);
+
+    /** BigQuery geographic location where the query job will be executed. */
+    public abstract Builder setQueryLocation(String value);
+
+    /** Enables BigQuery's Standard SQL dialect when reading from a query. */
+    public abstract Builder setUseStandardSql(Boolean value);
+
+    /** Builds the {@link BigQuerySchemaTransformReadConfiguration} configuration. */
+    public abstract BigQuerySchemaTransformReadConfiguration build();
+  }
+}

sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaTransformReadProvider.java

@@ -0,0 +1,177 @@
+/*
+ * 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.gcp.bigquery;
+
+import com.google.api.services.bigquery.model.TableRow;
+import com.google.common.annotations.VisibleForTesting;
+import java.util.Collections;
+import java.util.List;
+import org.apache.beam.sdk.annotations.Experimental;
+import org.apache.beam.sdk.annotations.Experimental.Kind;
+import org.apache.beam.sdk.annotations.Internal;
+import org.apache.beam.sdk.schemas.Schema;
+import org.apache.beam.sdk.schemas.transforms.SchemaTransform;
+import org.apache.beam.sdk.schemas.transforms.TypedSchemaTransformProvider;
+import org.apache.beam.sdk.transforms.MapElements;
+import org.apache.beam.sdk.transforms.PTransform;
+import org.apache.beam.sdk.values.PCollection;
+import org.apache.beam.sdk.values.PCollectionRowTuple;
+import org.apache.beam.sdk.values.Row;
+import org.apache.beam.sdk.values.TypeDescriptor;
+import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Strings;
+
+/**
+ * An implementation of {@link TypedSchemaTransformProvider} for BigQuery read jobs configured using
+ * {@link BigQuerySchemaTransformReadConfiguration}.
+ *
+ * <p><b>Internal only:</b> This class is actively being worked on, and it will likely change. We
+ * provide no backwards compatibility guarantees, and it should not be implemented outside the Beam
+ * repository.
+ */
+@SuppressWarnings({
+  "nullness" // TODO(https://issues.apache.org/jira/browse/BEAM-10402)
+})
+@Internal
+@Experimental(Kind.SCHEMAS)
+public class BigQuerySchemaTransformReadProvider
+    extends TypedSchemaTransformProvider<BigQuerySchemaTransformReadConfiguration> {
+
+  private static final String API = "bigquery";
+  private static final String OUTPUT_TAG = "OUTPUT";
+
+  /** Returns the expected class of the configuration. */
+  @Override
+  protected Class<BigQuerySchemaTransformReadConfiguration> configurationClass() {
+    return BigQuerySchemaTransformReadConfiguration.class;
+  }
+
+  /** Returns the expected {@link SchemaTransform} of the configuration. */
+  @Override
+  protected SchemaTransform from(BigQuerySchemaTransformReadConfiguration configuration) {
+    return new BigQueryReadSchemaTransform(configuration);
+  }
+
+  /** Implementation of the {@link TypedSchemaTransformProvider} identifier method. */
+  @Override
+  public String identifier() {
+    return String.format("%s:read", API);
+  }
+
+  /**
+   * 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. Since
+   * a single output is expected, this returns a list with a single name.
+   */
+  @Override
+  public List<String> outputCollectionNames() {
+    return Collections.singletonList(OUTPUT_TAG);
+  }
+
+  /**
+   * An implementation of {@link SchemaTransform} for BigQuery read jobs configured using {@link
+   * BigQuerySchemaTransformReadConfiguration}.
+   */
+  private static class BigQueryReadSchemaTransform implements SchemaTransform {
+    private final BigQuerySchemaTransformReadConfiguration configuration;
+
+    BigQueryReadSchemaTransform(BigQuerySchemaTransformReadConfiguration configuration) {
+      this.configuration = configuration;
+    }
+
+    /** Implements {@link SchemaTransform} buildTransform method. */
+    @Override
+    public PTransform<PCollectionRowTuple, PCollectionRowTuple> buildTransform() {
+      return new PCollectionRowTupleTransform(configuration);
+    }
+  }
+
+  /**
+   * An implementation of {@link PTransform} for BigQuery read jobs configured using {@link
+   * BigQuerySchemaTransformReadConfiguration}.
+   */
+  static class PCollectionRowTupleTransform
+      extends PTransform<PCollectionRowTuple, PCollectionRowTuple> {
+
+    private final BigQuerySchemaTransformReadConfiguration configuration;
+
+    /** An instance of {@link BigQueryServices} used for testing. */
+    private BigQueryServices testBigQueryServices = null;
+
+    PCollectionRowTupleTransform(BigQuerySchemaTransformReadConfiguration configuration) {
+      this.configuration = configuration;
+    }
+
+    @VisibleForTesting
+    void setTestBigQueryServices(BigQueryServices testBigQueryServices) {
+      this.testBigQueryServices = testBigQueryServices;
+    }
+
+    @Override
+    public PCollectionRowTuple expand(PCollectionRowTuple input) {
+      if (!input.getAll().isEmpty()) {
+        throw new IllegalArgumentException(
+            String.format(
+                "%s %s input is expected to be empty",
+                input.getClass().getSimpleName(), getClass().getSimpleName()));
+      }
+
+      BigQueryIO.TypedRead<TableRow> read = toTypedRead();
+      if (testBigQueryServices != null) {
+        read = read.withTestServices(testBigQueryServices).withoutValidation();
+      }
+
+      PCollection<TableRow> tableRowPCollection = input.getPipeline().apply(read);
+      Schema schema = tableRowPCollection.getSchema();
+      PCollection<Row> rowPCollection =
+          tableRowPCollection.apply(
+              MapElements.into(TypeDescriptor.of(Row.class))
+                  .via((tableRow) -> BigQueryUtils.toBeamRow(schema, tableRow)));
+      return PCollectionRowTuple.of(OUTPUT_TAG, rowPCollection.setRowSchema(schema));
+    }
+
+    BigQueryIO.TypedRead<TableRow> toTypedRead() {
+      BigQueryIO.TypedRead<TableRow> read = BigQueryIO.readTableRowsWithSchema();
+
+      if (!Strings.isNullOrEmpty(configuration.getQuery())) {
+        read = read.fromQuery(configuration.getQuery());
+      }
+
+      if (!Strings.isNullOrEmpty(configuration.getTableSpec())) {
+        read = read.from(configuration.getTableSpec());
+      }
+
+      if (configuration.getUseStandardSql() != null && configuration.getUseStandardSql()) {
+        read = read.usingStandardSql();
+      }
+
+      if (!Strings.isNullOrEmpty(configuration.getQueryLocation())) {
+        read = read.withQueryLocation(configuration.getQueryLocation());
+      }
+
+      return read;
+    }
+  }
+}

sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BigQuerySchemaTransformWriteConfiguration.java

@@ -0,0 +1,86 @@
+/*
+ * 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.gcp.bigquery;
+
+import com.google.auto.value.AutoValue;
+import org.apache.beam.sdk.schemas.AutoValueSchema;
+import org.apache.beam.sdk.schemas.annotations.DefaultSchema;
+import org.apache.beam.sdk.transforms.SerializableFunction;
+import org.apache.beam.sdk.values.Row;
+import org.apache.beam.sdk.values.TypeDescriptor;
+
+/**
+ * Configuration for writing to BigQuery.
+ *
+ * <p>This class is meant to be used with {@link BigQuerySchemaTransformWriteProvider}.
+ *
+ * <p><b>Internal only:</b> This class is actively being worked on, and it will likely change. We
+ * provide no backwards compatibility guarantees, and it should not be implemented outside the Beam
+ * repository.
+ */
+@DefaultSchema(AutoValueSchema.class)
+@AutoValue
+public abstract class BigQuerySchemaTransformWriteConfiguration {
+
+  /** Instantiates a {@link BigQuerySchemaTransformWriteConfiguration.Builder}. */
+  public static Builder builder() {
+    return new AutoValue_BigQuerySchemaTransformWriteConfiguration.Builder();
+  }
+
+  private static final AutoValueSchema AUTO_VALUE_SCHEMA = new AutoValueSchema();
+  private static final TypeDescriptor<BigQuerySchemaTransformWriteConfiguration> TYPE_DESCRIPTOR =
+      TypeDescriptor.of(BigQuerySchemaTransformWriteConfiguration.class);
+  private static final SerializableFunction<BigQuerySchemaTransformWriteConfiguration, Row>
+      ROW_SERIALIZABLE_FUNCTION = AUTO_VALUE_SCHEMA.toRowFunction(TYPE_DESCRIPTOR);
+
+  /**
+   * Writes to the given table specification. See {@link BigQueryIO.Write#to(String)}} for the
+   * expected format.
+   */
+  public abstract String getTableSpec();
+
+  /** Specifies whether the table should be created if it does not exist. */
+  public abstract String getCreateDisposition();
+
+  /** Specifies what to do with existing data in the table, in case the table already exists. */
+  public abstract String getWriteDisposition();
+
+  /** Serializes configuration to a {@link Row}. */
+  Row toBeamRow() {
+    return ROW_SERIALIZABLE_FUNCTION.apply(this);
+  }
+
+  @AutoValue.Builder
+  public abstract static class Builder {
+
+    /**
+     * Writes to the given table specification. See {@link BigQueryIO.Write#to(String)}} for the
+     * expected format.
+     */
+    public abstract Builder setTableSpec(String value);
+
+    /** Specifies whether the table should be created if it does not exist. */
+    public abstract Builder setCreateDisposition(String value);
+
+    /** Specifies what to do with existing data in the table, in case the table already exists. */
+    public abstract Builder setWriteDisposition(String value);
+
+    /** Builds the {@link BigQuerySchemaTransformWriteConfiguration} configuration. */
+    public abstract BigQuerySchemaTransformWriteConfiguration build();
+  }
+}