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com.google.cloud.bigquery.BigQueryImpl Maven / Gradle / Ivy

/*
 * Copyright 2015 Google LLC
 *
 * Licensed 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 com.google.cloud.bigquery;

import static com.google.cloud.RetryHelper.runWithRetries;
import static com.google.common.base.Preconditions.checkArgument;

import com.google.api.core.InternalApi;
import com.google.api.gax.paging.Page;
import com.google.api.services.bigquery.model.ErrorProto;
import com.google.api.services.bigquery.model.GetQueryResultsResponse;
import com.google.api.services.bigquery.model.TableDataInsertAllRequest;
import com.google.api.services.bigquery.model.TableDataInsertAllRequest.Rows;
import com.google.api.services.bigquery.model.TableDataInsertAllResponse;
import com.google.api.services.bigquery.model.TableDataList;
import com.google.api.services.bigquery.model.TableRow;
import com.google.api.services.bigquery.model.TableSchema;
import com.google.cloud.BaseService;
import com.google.cloud.PageImpl;
import com.google.cloud.PageImpl.NextPageFetcher;
import com.google.cloud.RetryHelper;
import com.google.cloud.RetryHelper.RetryHelperException;
import com.google.cloud.Tuple;
import com.google.cloud.bigquery.InsertAllRequest.RowToInsert;
import com.google.cloud.bigquery.spi.v2.BigQueryRpc;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Function;
import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Callable;

final class BigQueryImpl extends BaseService implements BigQuery {

  private static class DatasetPageFetcher implements NextPageFetcher {

    private static final long serialVersionUID = -3057564042439021278L;
    private final Map requestOptions;
    private final BigQueryOptions serviceOptions;
    private final String projectId;

    DatasetPageFetcher(String projectId, BigQueryOptions serviceOptions, String cursor,
        Map optionMap) {
      this.projectId = projectId;
      this.requestOptions =
          PageImpl.nextRequestOptions(BigQueryRpc.Option.PAGE_TOKEN, cursor, optionMap);
      this.serviceOptions = serviceOptions;
    }

    @Override
    public Page getNextPage() {
      return listDatasets(projectId, serviceOptions, requestOptions);
    }
  }

  private static class TablePageFetcher implements NextPageFetcher {

    private static final long serialVersionUID = 8611248840504201187L;
    private final Map requestOptions;
    private final BigQueryOptions serviceOptions;
    private final DatasetId datasetId;

    TablePageFetcher(DatasetId datasetId, BigQueryOptions serviceOptions, String cursor,
        Map optionMap) {
      this.requestOptions =
          PageImpl.nextRequestOptions(BigQueryRpc.Option.PAGE_TOKEN, cursor, optionMap);
      this.serviceOptions = serviceOptions;
      this.datasetId = datasetId;
    }

    @Override
    public Page getNextPage() {
      return listTables(datasetId, serviceOptions, requestOptions);
    }
  }

  private static class JobPageFetcher implements NextPageFetcher {

    private static final long serialVersionUID = 8536533282558245472L;
    private final Map requestOptions;
    private final BigQueryOptions serviceOptions;

    JobPageFetcher(BigQueryOptions serviceOptions, String cursor,
        Map optionMap) {
      this.requestOptions =
          PageImpl.nextRequestOptions(BigQueryRpc.Option.PAGE_TOKEN, cursor, optionMap);
      this.serviceOptions = serviceOptions;
    }

    @Override
    public Page getNextPage() {
      return listJobs(serviceOptions, requestOptions);
    }
  }

  private static class TableDataPageFetcher implements NextPageFetcher {

    private static final long serialVersionUID = -8501991114794410114L;
    private final Map requestOptions;
    private final BigQueryOptions serviceOptions;
    private final TableId table;

    TableDataPageFetcher(TableId table, BigQueryOptions serviceOptions, String cursor,
        Map optionMap) {
      this.requestOptions =
          PageImpl.nextRequestOptions(BigQueryRpc.Option.PAGE_TOKEN, cursor, optionMap);
      this.serviceOptions = serviceOptions;
      this.table = table;
    }

    @Override
    public Page getNextPage() {
      return listTableData(table, serviceOptions, requestOptions).x();
    }
  }

  private final BigQueryRpc bigQueryRpc;

  BigQueryImpl(BigQueryOptions options) {
    super(options);
    bigQueryRpc = options.getBigQueryRpcV2();
  }

  @Override
  public Dataset create(DatasetInfo datasetInfo, DatasetOption... options) {
    final com.google.api.services.bigquery.model.Dataset datasetPb =
        datasetInfo.setProjectId(getOptions().getProjectId()).toPb();
    final Map optionsMap = optionMap(options);
    try {
      return Dataset.fromPb(this,
          runWithRetries(new Callable() {
            @Override
            public com.google.api.services.bigquery.model.Dataset call() {
              return bigQueryRpc.create(datasetPb, optionsMap);
            }
          }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock()));
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public Table create(TableInfo tableInfo, TableOption... options) {
    final com.google.api.services.bigquery.model.Table tablePb =
        tableInfo.setProjectId(getOptions().getProjectId()).toPb();
    final Map optionsMap = optionMap(options);
    try {
      return Table.fromPb(this,
          runWithRetries(new Callable() {
            @Override
            public com.google.api.services.bigquery.model.Table call() {
              return bigQueryRpc.create(tablePb, optionsMap);
            }
          }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock()));
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public Job create(JobInfo jobInfo, JobOption... options) {
    Supplier idProvider =
        new Supplier() {
          @Override
          public JobId get() {
            return JobId.of();
          }
        };
    return create(jobInfo, idProvider, options);
  }

  @InternalApi("visible for testing")
  Job create(JobInfo jobInfo, Supplier idProvider, JobOption... options) {
    boolean idRandom = false;
    if (jobInfo.getJobId() == null) {
      jobInfo = jobInfo.toBuilder().setJobId(idProvider.get()).build();
      idRandom = true;
    }
    final com.google.api.services.bigquery.model.Job jobPb =
        jobInfo.setProjectId(getOptions().getProjectId()).toPb();
    final Map optionsMap = optionMap(options);

    BigQueryException createException;
    // NOTE(pongad): This double-try structure is admittedly odd.
    // translateAndThrow itself throws, and pretends to return an exception only
    // so users can pretend to throw.
    // This makes it difficult to translate without throwing.
    // Fixing this entails some work on BaseServiceException.translate.
    // Since that affects a bunch of APIs, we should fix this as a separate change.
    try {
      try {
        return Job.fromPb(
            this,
            runWithRetries(
                new Callable() {
                  @Override
                  public com.google.api.services.bigquery.model.Job call() {
                    return bigQueryRpc.create(jobPb, optionsMap);
                  }
                },
                getOptions().getRetrySettings(),
                EXCEPTION_HANDLER,
                getOptions().getClock()));
      } catch (RetryHelper.RetryHelperException e) {
        throw BigQueryException.translateAndThrow(e);
      }
    } catch (BigQueryException e) {
      createException = e;
    }

    if (!idRandom) {
      throw createException;
    }

    // If create RPC fails, it's still possible that the job has been successfully created,
    // and get might work.
    // We can only do this if we randomly generated the ID. Otherwise we might mistakenly
    // fetch a job created by someone else.
    try {
      return getJob(jobInfo.getJobId());
    } catch (BigQueryException e) {
      throw createException;
    }
  }

  @Override
  public Dataset getDataset(String datasetId, DatasetOption... options) {
    return getDataset(DatasetId.of(datasetId), options);
  }

  @Override
  public Dataset getDataset(final DatasetId datasetId, DatasetOption... options) {
    final DatasetId completeDatasetId = datasetId.setProjectId(getOptions().getProjectId());
    final Map optionsMap = optionMap(options);
    try {
      com.google.api.services.bigquery.model.Dataset answer =
          runWithRetries(new Callable() {
            @Override
            public com.google.api.services.bigquery.model.Dataset call() {
              return bigQueryRpc.getDataset(
                  completeDatasetId.getProject(), completeDatasetId.getDataset(), optionsMap);
            }
          }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock());
      return answer == null ? null : Dataset.fromPb(this, answer);
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public Page listDatasets(DatasetListOption... options) {
    return listDatasets(getOptions().getProjectId(), options);
  }

  @Override
  public Page listDatasets(String projectId, DatasetListOption... options) {
    return listDatasets(projectId, getOptions(), optionMap(options));
  }

  private static Page listDatasets(
      final String projectId,
      final BigQueryOptions serviceOptions,
      final Map optionsMap) {
    try {
      Tuple> result =
          runWithRetries(
              new Callable<
                  Tuple>>() {
                @Override
                public Tuple>
                    call() {
                  return serviceOptions.getBigQueryRpcV2().listDatasets(projectId, optionsMap);
                }
              },
              serviceOptions.getRetrySettings(),
              EXCEPTION_HANDLER,
              serviceOptions.getClock());
      String cursor = result.x();
      return new PageImpl<>(
          new DatasetPageFetcher(projectId, serviceOptions, cursor, optionsMap),
          cursor,
          Iterables.transform(
              result.y(),
              new Function() {
                @Override
                public Dataset apply(com.google.api.services.bigquery.model.Dataset dataset) {
                  return Dataset.fromPb(serviceOptions.getService(), dataset);
                }
              }));
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public boolean delete(String datasetId, DatasetDeleteOption... options) {
    return delete(DatasetId.of(datasetId), options);
  }

  @Override
  public boolean delete(DatasetId datasetId, DatasetDeleteOption... options) {
    final DatasetId completeDatasetId = datasetId.setProjectId(getOptions().getProjectId());
    final Map optionsMap = optionMap(options);
    try {
      return runWithRetries(new Callable() {
        @Override
        public Boolean call() {
          return bigQueryRpc.deleteDataset(
              completeDatasetId.getProject(), completeDatasetId.getDataset(), optionsMap);
        }
      }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock());
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public boolean delete(String datasetId, String tableId) {
    return delete(TableId.of(datasetId, tableId));
  }

  @Override
  public boolean delete(TableId tableId) {
    final TableId completeTableId = tableId.setProjectId(getOptions().getProjectId());
    try {
      return runWithRetries(new Callable() {
        @Override
        public Boolean call() {
          return bigQueryRpc.deleteTable(completeTableId.getProject(), completeTableId.getDataset(),
              completeTableId.getTable());
        }
      }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock());
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public Dataset update(DatasetInfo datasetInfo, DatasetOption... options) {
    final com.google.api.services.bigquery.model.Dataset datasetPb =
        datasetInfo.setProjectId(getOptions().getProjectId()).toPb();
    final Map optionsMap = optionMap(options);
    try {
      return Dataset.fromPb(this,
          runWithRetries(new Callable() {
            @Override
            public com.google.api.services.bigquery.model.Dataset call() {
              return bigQueryRpc.patch(datasetPb, optionsMap);
            }
          }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock()));
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public Table update(TableInfo tableInfo, TableOption... options) {
    final com.google.api.services.bigquery.model.Table tablePb =
        tableInfo.setProjectId(getOptions().getProjectId()).toPb();
    final Map optionsMap = optionMap(options);
    try {
      return Table.fromPb(this,
          runWithRetries(new Callable() {
            @Override
            public com.google.api.services.bigquery.model.Table call() {
              return bigQueryRpc.patch(tablePb, optionsMap);
            }
          }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock()));
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public Table getTable(final String datasetId, final String tableId, TableOption... options) {
    return getTable(TableId.of(datasetId, tableId), options);
  }

  @Override
  public Table getTable(TableId tableId, TableOption... options) {
    final TableId completeTableId = tableId.setProjectId(getOptions().getProjectId());
    final Map optionsMap = optionMap(options);
    try {
      com.google.api.services.bigquery.model.Table answer =
          runWithRetries(new Callable() {
            @Override
            public com.google.api.services.bigquery.model.Table call() {
              return bigQueryRpc.getTable(completeTableId.getProject(),
                  completeTableId.getDataset(), completeTableId.getTable(), optionsMap);
            }
          }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock());
      return answer == null ? null : Table.fromPb(this, answer);
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public Page listTables(String datasetId, TableListOption... options) {
    return listTables(
        DatasetId.of(getOptions().getProjectId(), datasetId), getOptions(), optionMap(options));
  }

  @Override
  public Page listTables(DatasetId datasetId, TableListOption... options) {
    DatasetId completeDatasetId = datasetId.setProjectId(getOptions().getProjectId());
    return listTables(completeDatasetId, getOptions(), optionMap(options));
  }

  private static Page listTables(final DatasetId datasetId,
      final BigQueryOptions serviceOptions, final Map optionsMap) {
    try {
      Tuple> result =
          runWithRetries(new Callable>>() {
            @Override
            public Tuple>
                call() {
                  return serviceOptions.getBigQueryRpcV2().listTables(
                      datasetId.getProject(), datasetId.getDataset(), optionsMap);
                }
          }, serviceOptions.getRetrySettings(), EXCEPTION_HANDLER, serviceOptions.getClock());
      String cursor = result.x();
      Iterable tables = Iterables.transform(result.y(),
          new Function() {
            @Override
            public Table apply(com.google.api.services.bigquery.model.Table table) {
              return Table.fromPb(serviceOptions.getService(), table);
            }
          });
      return new PageImpl<>(new TablePageFetcher(datasetId, serviceOptions, cursor, optionsMap),
          cursor, tables);
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public InsertAllResponse insertAll(InsertAllRequest request) {
    final TableId tableId = request.getTable().setProjectId(getOptions().getProjectId());
    final TableDataInsertAllRequest requestPb = new TableDataInsertAllRequest();
    requestPb.setIgnoreUnknownValues(request.ignoreUnknownValues());
    requestPb.setSkipInvalidRows(request.skipInvalidRows());
    requestPb.setTemplateSuffix(request.getTemplateSuffix());
    // Using an array of size 1 here to have a mutable boolean variable, which can be modified in
    // an anonymous inner class.
    final boolean[] allInsertIdsSet = {true};
    List rowsPb = Lists.transform(request.getRows(), new Function() {
      @Override
      public Rows apply(RowToInsert rowToInsert) {
        allInsertIdsSet[0] &= rowToInsert.getId() != null;
        return new Rows().setInsertId(rowToInsert.getId()).setJson(rowToInsert.getContent());
      }
    });
    requestPb.setRows(rowsPb);

    TableDataInsertAllResponse responsePb;
    if (allInsertIdsSet[0]) {
      // allowing retries only if all row insertIds are set (used for deduplication)
      try {
        responsePb = runWithRetries(
            new Callable() {
              @Override
              public TableDataInsertAllResponse call() throws Exception {
                return bigQueryRpc.insertAll(tableId.getProject(), tableId.getDataset(),
                    tableId.getTable(), requestPb);
              }
            }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock());
      } catch (RetryHelperException e) {
        throw BigQueryException.translateAndThrow(e);
      }
    } else {
      responsePb = bigQueryRpc.insertAll(tableId.getProject(), tableId.getDataset(),
          tableId.getTable(), requestPb);
    }

    return InsertAllResponse.fromPb(responsePb);
  }

  @Override
  public TableResult listTableData(
      String datasetId, String tableId, TableDataListOption... options) {
    return listTableData(TableId.of(datasetId, tableId), options);
  }

  @Override
  public TableResult listTableData(TableId tableId, TableDataListOption... options) {
    return listTableData(tableId, null, options);
  }

  @Override
  public TableResult listTableData(
      String datasetId, String tableId, Schema schema, TableDataListOption... options) {
    return listTableData(TableId.of(datasetId, tableId), schema, options);
  }

  @Override
  public TableResult listTableData(TableId tableId, Schema schema, TableDataListOption... options) {
    Tuple, Long> data =
        listTableData(tableId, getOptions(), optionMap(options));
    return new TableResult(schema, data.y(), data.x());
  }

  private static Tuple, Long> listTableData(
      final TableId tableId,
      final BigQueryOptions serviceOptions,
      final Map optionsMap) {
    try {
      final TableId completeTableId = tableId.setProjectId(serviceOptions.getProjectId());
      TableDataList result =
          runWithRetries(
              new Callable() {
                @Override
                public TableDataList call() {
                  return serviceOptions
                      .getBigQueryRpcV2()
                      .listTableData(
                          completeTableId.getProject(),
                          completeTableId.getDataset(),
                          completeTableId.getTable(),
                          optionsMap);
                }
              },
              serviceOptions.getRetrySettings(),
              EXCEPTION_HANDLER,
              serviceOptions.getClock());
      String cursor = result.getPageToken();
      return Tuple.of(
          new PageImpl<>(
              new TableDataPageFetcher(tableId, serviceOptions, cursor, optionsMap),
              cursor,
              transformTableData(result.getRows())),
          result.getTotalRows());
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  private static Iterable transformTableData(Iterable tableDataPb) {
    return ImmutableList.copyOf(
        Iterables.transform(
            tableDataPb != null ? tableDataPb : ImmutableList.of(),
            new Function() {
              @Override
              public FieldValueList apply(TableRow rowPb) {
                return FieldValueList.fromPb(rowPb.getF(), null);
              }
            }));
  }

  @Override
  public Job getJob(String jobId, JobOption... options) {
    return getJob(JobId.of(jobId), options);
  }

  @Override
  public Job getJob(JobId jobId, JobOption... options) {
    final Map optionsMap = optionMap(options);
    final JobId completeJobId = jobId.setProjectId(getOptions().getProjectId());
    try {
      com.google.api.services.bigquery.model.Job answer =
          runWithRetries(new Callable() {
            @Override
            public com.google.api.services.bigquery.model.Job call() {
              return bigQueryRpc.getJob(completeJobId.getProject(), completeJobId.getJob(),
                  optionsMap);
            }
          }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock());
      return answer == null ? null : Job.fromPb(this, answer);
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public Page listJobs(JobListOption... options) {
    return listJobs(getOptions(), optionMap(options));
  }

  private static Page listJobs(final BigQueryOptions serviceOptions,
      final Map optionsMap) {
    Tuple> result =
        runWithRetries(new Callable>>() {
          @Override
          public Tuple>
              call() {
            return serviceOptions.getBigQueryRpcV2().listJobs(serviceOptions.getProjectId(), optionsMap);
          }
        }, serviceOptions.getRetrySettings(), EXCEPTION_HANDLER, serviceOptions.getClock());
    String cursor = result.x();
    Iterable jobs = Iterables.transform(result.y(),
        new Function() {
          @Override
          public Job apply(com.google.api.services.bigquery.model.Job job) {
            return Job.fromPb(serviceOptions.getService(), job);
          }
        });
    return new PageImpl<>(new JobPageFetcher(serviceOptions, cursor, optionsMap), cursor, jobs);
  }

  @Override
  public boolean cancel(String jobId) {
    return cancel(JobId.of(jobId));
  }

  @Override
  public boolean cancel(JobId jobId) {
    final JobId completeJobId = jobId.setProjectId(getOptions().getProjectId());
    try {
      return runWithRetries(new Callable() {
        @Override
        public Boolean call() {
          return bigQueryRpc.cancel(completeJobId.getProject(), completeJobId.getJob());
        }
      }, getOptions().getRetrySettings(), EXCEPTION_HANDLER, getOptions().getClock());
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public TableResult query(QueryJobConfiguration configuration, JobOption... options)
      throws InterruptedException, JobException {
    Job.checkNotDryRun(configuration, "query");
    return create(JobInfo.of(configuration), options).getQueryResults();
  }

  @Override
  public TableResult query(QueryJobConfiguration configuration, JobId jobId, JobOption... options)
      throws InterruptedException, JobException {
    Job.checkNotDryRun(configuration, "query");
    return create(JobInfo.of(jobId, configuration), options).getQueryResults();
  }

  @Override
  public QueryResponse getQueryResults(JobId jobId, QueryResultsOption... options) {
    Map optionsMap = optionMap(options);
    return getQueryResults(jobId, getOptions(), optionsMap);
  }

  private static QueryResponse getQueryResults(JobId jobId,
      final BigQueryOptions serviceOptions, final Map optionsMap) {
    final JobId completeJobId = jobId.setProjectId(serviceOptions.getProjectId());
    try {
      GetQueryResultsResponse results =
          runWithRetries(new Callable() {
            @Override
            public GetQueryResultsResponse call() {
              return serviceOptions.getBigQueryRpcV2().getQueryResults(
                  completeJobId.getProject(), completeJobId.getJob(), optionsMap);
            }
          }, serviceOptions.getRetrySettings(), EXCEPTION_HANDLER, serviceOptions.getClock());
      TableSchema schemaPb = results.getSchema();

      ImmutableList.Builder errors = ImmutableList.builder();
      if (results.getErrors() != null) {
        for (ErrorProto error : results.getErrors()) {
          errors.add(BigQueryError.fromPb(error));
        }
      }

      return QueryResponse.newBuilder()
          .setCompleted(results.getJobComplete())
          .setSchema(schemaPb == null ? null : Schema.fromPb(schemaPb))
          .setTotalRows(results.getTotalRows() == null ? 0 : results.getTotalRows().longValue())
          .setErrors(errors.build())
          .build();
    } catch (RetryHelper.RetryHelperException e) {
      throw BigQueryException.translateAndThrow(e);
    }
  }

  @Override
  public TableDataWriteChannel writer(WriteChannelConfiguration writeChannelConfiguration) {
    return new TableDataWriteChannel(getOptions(),
        writeChannelConfiguration.setProjectId(getOptions().getProjectId()));
  }

  @VisibleForTesting
  static Map optionMap(Option... options) {
    Map optionMap = Maps.newEnumMap(BigQueryRpc.Option.class);
    for (Option option : options) {
      Object prev = optionMap.put(option.getRpcOption(), option.getValue());
      checkArgument(prev == null, "Duplicate option %s", option);
    }
    return optionMap;
  }
}
 













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