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/*
 * Copyright 2016 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 com.google.api.core.ApiFunction;
import com.google.api.services.bigquery.model.JobConfiguration;
import com.google.api.services.bigquery.model.JobStatistics2;
import com.google.api.services.bigquery.model.JobStatistics3;
import com.google.api.services.bigquery.model.JobStatistics4;
import com.google.cloud.StringEnumType;
import com.google.cloud.StringEnumValue;
import com.google.common.base.Function;
import com.google.common.base.MoreObjects;
import com.google.common.base.MoreObjects.ToStringHelper;
import com.google.common.collect.Lists;
import java.io.Serializable;
import java.util.List;
import java.util.Objects;
import org.checkerframework.checker.nullness.compatqual.NullableDecl;

/** A Google BigQuery Job statistics. */
public abstract class JobStatistics implements Serializable {

  private static final long serialVersionUID = 1433024714741660399L;

  private final Long creationTime;
  private final Long endTime;
  private final Long startTime;
  private final Long numChildJobs;
  private final String parentJobId;
  private final ScriptStatistics scriptStatistics;
  private final List reservationUsage;
  private final TransactionInfo transactionInfo;
  private final SessionInfo sessionInfo;

  /** A Google BigQuery Copy Job statistics. */
  public static class CopyStatistics extends JobStatistics {

    private static final long serialVersionUID = 8218325588441660938L;

    static final class Builder extends JobStatistics.Builder {

      private Builder() {}

      private Builder(com.google.api.services.bigquery.model.JobStatistics statisticsPb) {
        super(statisticsPb);
      }

      @Override
      CopyStatistics build() {
        return new CopyStatistics(this);
      }
    }

    private CopyStatistics(Builder builder) {
      super(builder);
    }

    @Override
    public final boolean equals(Object obj) {
      return obj == this
          || obj != null
              && obj.getClass().equals(CopyStatistics.class)
              && baseEquals((CopyStatistics) obj);
    }

    @Override
    public final int hashCode() {
      return baseHashCode();
    }

    static Builder newBuilder() {
      return new Builder();
    }

    @SuppressWarnings("unchecked")
    static CopyStatistics fromPb(com.google.api.services.bigquery.model.JobStatistics statisticPb) {
      return new Builder(statisticPb).build();
    }
  }

  /** A Google BigQuery Extract Job statistics. */
  public static class ExtractStatistics extends JobStatistics {

    private static final long serialVersionUID = -1566598819212767373L;

    private final List destinationUriFileCounts;

    static final class Builder extends JobStatistics.Builder {

      private List destinationUriFileCounts;

      private Builder() {}

      private Builder(com.google.api.services.bigquery.model.JobStatistics statisticsPb) {
        super(statisticsPb);
        if (statisticsPb.getExtract() != null) {
          this.destinationUriFileCounts = statisticsPb.getExtract().getDestinationUriFileCounts();
        }
      }

      Builder setDestinationUriFileCounts(List destinationUriFileCounts) {
        this.destinationUriFileCounts = destinationUriFileCounts;
        return self();
      }

      @Override
      ExtractStatistics build() {
        return new ExtractStatistics(this);
      }
    }

    private ExtractStatistics(Builder builder) {
      super(builder);
      this.destinationUriFileCounts = builder.destinationUriFileCounts;
    }

    /**
     * Returns the number of files per destination URI or URI pattern specified in the extract job.
     * These values will be in the same order as the URIs specified by {@link
     * ExtractJobConfiguration#getDestinationUris()}.
     */
    public List getDestinationUriFileCounts() {
      return destinationUriFileCounts;
    }

    @Override
    ToStringHelper toStringHelper() {
      return super.toStringHelper().add("destinationUriFileCounts", destinationUriFileCounts);
    }

    @Override
    public final boolean equals(Object obj) {
      return obj == this
          || obj != null
              && obj.getClass().equals(ExtractStatistics.class)
              && baseEquals((ExtractStatistics) obj);
    }

    @Override
    public final int hashCode() {
      return Objects.hash(baseHashCode(), destinationUriFileCounts);
    }

    @Override
    com.google.api.services.bigquery.model.JobStatistics toPb() {
      com.google.api.services.bigquery.model.JobStatistics statisticsPb = super.toPb();
      return statisticsPb.setExtract(
          new JobStatistics4().setDestinationUriFileCounts(destinationUriFileCounts));
    }

    static Builder newBuilder() {
      return new Builder();
    }

    @SuppressWarnings("unchecked")
    static ExtractStatistics fromPb(
        com.google.api.services.bigquery.model.JobStatistics statisticPb) {
      return new Builder(statisticPb).build();
    }
  }

  /** A Google BigQuery Load Job statistics. */
  public static class LoadStatistics extends JobStatistics {

    private static final long serialVersionUID = -707369246536309215L;

    private final Long inputBytes;
    private final Long inputFiles;
    private final Long outputBytes;
    private final Long outputRows;
    private final Long badRecords;

    static final class Builder extends JobStatistics.Builder {

      private Long inputBytes;
      private Long inputFiles;
      private Long outputBytes;
      private Long outputRows;
      private Long badRecords;

      private Builder() {}

      private Builder(com.google.api.services.bigquery.model.JobStatistics statisticsPb) {
        super(statisticsPb);
        if (statisticsPb.getLoad() != null) {
          this.inputBytes = statisticsPb.getLoad().getInputFileBytes();
          this.inputFiles = statisticsPb.getLoad().getInputFiles();
          this.outputBytes = statisticsPb.getLoad().getOutputBytes();
          this.outputRows = statisticsPb.getLoad().getOutputRows();
          this.badRecords = statisticsPb.getLoad().getBadRecords();
        }
      }

      Builder setInputBytes(Long inputBytes) {
        this.inputBytes = inputBytes;
        return self();
      }

      Builder setInputFiles(Long inputFiles) {
        this.inputFiles = inputFiles;
        return self();
      }

      Builder setOutputBytes(Long outputBytes) {
        this.outputBytes = outputBytes;
        return self();
      }

      Builder setOutputRows(Long outputRows) {
        this.outputRows = outputRows;
        return self();
      }

      Builder setBadRecords(Long badRecords) {
        this.badRecords = badRecords;
        return self();
      }

      @Override
      LoadStatistics build() {
        return new LoadStatistics(this);
      }
    }

    private LoadStatistics(Builder builder) {
      super(builder);
      this.inputBytes = builder.inputBytes;
      this.inputFiles = builder.inputFiles;
      this.outputBytes = builder.outputBytes;
      this.outputRows = builder.outputRows;
      this.badRecords = builder.badRecords;
    }

    /** Returns the number of bytes of source data in a load job. */
    public Long getInputBytes() {
      return inputBytes;
    }

    /** Returns the number of source files in a load job. */
    public Long getInputFiles() {
      return inputFiles;
    }

    /** Returns the size of the data loaded by a load job so far, in bytes. */
    public Long getOutputBytes() {
      return outputBytes;
    }

    /** Returns the number of rows loaded by a load job so far. */
    public Long getOutputRows() {
      return outputRows;
    }

    /** Returns the number of bad records reported in a job. */
    public Long getBadRecords() {
      return badRecords;
    }

    @Override
    ToStringHelper toStringHelper() {
      return super.toStringHelper()
          .add("inputBytes", inputBytes)
          .add("inputFiles", inputFiles)
          .add("outputBytes", outputBytes)
          .add("outputRows", outputRows)
          .add("badRecords", badRecords);
    }

    @Override
    public final boolean equals(Object obj) {
      return obj == this
          || obj != null
              && obj.getClass().equals(LoadStatistics.class)
              && baseEquals((LoadStatistics) obj);
    }

    @Override
    public final int hashCode() {
      return Objects.hash(
          baseHashCode(), inputBytes, inputFiles, outputBytes, outputRows, badRecords);
    }

    @Override
    com.google.api.services.bigquery.model.JobStatistics toPb() {
      JobStatistics3 loadStatisticsPb = new JobStatistics3();
      loadStatisticsPb.setInputFileBytes(inputBytes);
      loadStatisticsPb.setInputFiles(inputFiles);
      loadStatisticsPb.setOutputBytes(outputBytes);
      loadStatisticsPb.setOutputRows(outputRows);
      loadStatisticsPb.setBadRecords(badRecords);
      return super.toPb().setLoad(loadStatisticsPb);
    }

    static Builder newBuilder() {
      return new Builder();
    }

    @SuppressWarnings("unchecked")
    static LoadStatistics fromPb(com.google.api.services.bigquery.model.JobStatistics statisticPb) {
      return new Builder(statisticPb).build();
    }
  }

  /** A Google BigQuery Query Job statistics. */
  public static class QueryStatistics extends JobStatistics {

    private static final long serialVersionUID = 7539354109226732353L;

    private final Integer billingTier;
    private final Boolean cacheHit;
    private final String ddlOperationPerformed;
    private final TableId ddlTargetTable;
    private final RoutineId ddlTargetRoutine;
    private final Long estimatedBytesProcessed;
    private final Long numDmlAffectedRows;
    private final DmlStats dmlStats;
    private final List referencedTables;
    private final StatementType statementType;
    private final Long totalBytesBilled;
    private final Long totalBytesProcessed;
    private final Long totalPartitionsProcessed;
    private final Long totalSlotMs;
    private final List queryPlan;
    private final List timeline;
    private final Schema schema;

    /**
     * StatementType represents possible types of SQL statements reported as part of the
     * QueryStatistics of a BigQuery job.
     */
    public static final class StatementType extends StringEnumValue {
      private static final long serialVersionUID = 818920627219751204L;

      private static final ApiFunction CONSTRUCTOR =
          new ApiFunction() {
            @Override
            public StatementType apply(String constant) {
              return new StatementType(constant);
            }
          };

      private static final StringEnumType type =
          new StringEnumType(StatementType.class, CONSTRUCTOR);

      public static final StatementType SELECT = type.createAndRegister("SELECT");
      public static final StatementType UPDATE = type.createAndRegister("UPDATE");
      public static final StatementType INSERT = type.createAndRegister("INSERT");
      public static final StatementType DELETE = type.createAndRegister("DELETE");
      public static final StatementType CREATE_TABLE = type.createAndRegister("CREATE_TABLE");
      public static final StatementType CREATE_TABLE_AS_SELECT =
          type.createAndRegister("CREATE_TABLE_AS_SELECT");
      public static final StatementType CREATE_VIEW = type.createAndRegister("CREATE_VIEW");
      public static final StatementType CREATE_MODEL = type.createAndRegister("CREATE_MODEL");
      public static final StatementType CREATE_FUNCTION = type.createAndRegister("CREATE_FUNCTION");
      public static final StatementType CREATE_PROCEDURE =
          type.createAndRegister("CREATE_PROCEDURE");
      public static final StatementType ALTER_TABLE = type.createAndRegister("ALTER_TABLE");
      public static final StatementType ALTER_VIEW = type.createAndRegister("ALTER_VIEW");
      public static final StatementType DROP_TABLE = type.createAndRegister("DROP_TABLE");
      public static final StatementType DROP_VIEW = type.createAndRegister("DROP_VIEW");
      public static final StatementType DROP_FUNCTION = type.createAndRegister("DROP_FUNCTION");
      public static final StatementType DROP_PROCEDURE = type.createAndRegister("DROP_PROCEDURE");
      public static final StatementType MERGE = type.createAndRegister("MERGE");

      private StatementType(String constant) {
        super(constant);
      }

      /**
       * Get the StatementType for the given String constant, and throw an exception if the constant
       * is not recognized.
       */
      public static StatementType valueOfStrict(String constant) {
        return type.valueOfStrict(constant);
      }

      /** Get the State for the given String constant, and allow unrecognized values. */
      public static StatementType valueOf(String constant) {
        return type.valueOf(constant);
      }

      /** Return the known values for State. */
      public static StatementType[] values() {
        return type.values();
      }
    }

    static final class Builder extends JobStatistics.Builder {

      private Integer billingTier;
      private Boolean cacheHit;
      private String ddlOperationPerformed;
      private TableId ddlTargetTable;
      private RoutineId ddlTargetRoutine;
      private Long estimatedBytesProcessed;
      private Long numDmlAffectedRows;
      private DmlStats dmlStats;
      private List referencedTables;
      private StatementType statementType;
      private Long totalBytesBilled;
      private Long totalBytesProcessed;
      private Long totalPartitionsProcessed;
      private Long totalSlotMs;
      private List queryPlan;
      private List timeline;
      private Schema schema;

      private Builder() {}

      private Builder(com.google.api.services.bigquery.model.JobStatistics statisticsPb) {
        super(statisticsPb);
        if (statisticsPb.getQuery() != null) {
          this.billingTier = statisticsPb.getQuery().getBillingTier();
          this.cacheHit = statisticsPb.getQuery().getCacheHit();
          this.ddlOperationPerformed = statisticsPb.getQuery().getDdlOperationPerformed();
          if (statisticsPb.getQuery().getDdlTargetTable() != null) {
            this.ddlTargetTable = TableId.fromPb(statisticsPb.getQuery().getDdlTargetTable());
          }
          if (statisticsPb.getQuery().getDdlTargetRoutine() != null) {
            this.ddlTargetRoutine = RoutineId.fromPb(statisticsPb.getQuery().getDdlTargetRoutine());
          }
          this.estimatedBytesProcessed = statisticsPb.getQuery().getEstimatedBytesProcessed();
          this.numDmlAffectedRows = statisticsPb.getQuery().getNumDmlAffectedRows();
          this.totalBytesBilled = statisticsPb.getQuery().getTotalBytesBilled();
          this.totalBytesProcessed = statisticsPb.getQuery().getTotalBytesProcessed();
          this.totalPartitionsProcessed = statisticsPb.getQuery().getTotalPartitionsProcessed();
          this.totalSlotMs = statisticsPb.getQuery().getTotalSlotMs();
          if (statisticsPb.getQuery().getStatementType() != null) {
            this.statementType = StatementType.valueOf(statisticsPb.getQuery().getStatementType());
          }

          if (statisticsPb.getQuery().getReferencedTables() != null) {
            this.referencedTables =
                Lists.transform(
                    statisticsPb.getQuery().getReferencedTables(), TableId.FROM_PB_FUNCTION);
          }
          if (statisticsPb.getQuery().getQueryPlan() != null) {
            this.queryPlan =
                Lists.transform(
                    statisticsPb.getQuery().getQueryPlan(), QueryStage.FROM_PB_FUNCTION);
          }
          if (statisticsPb.getQuery().getTimeline() != null) {
            this.timeline =
                Lists.transform(
                    statisticsPb.getQuery().getTimeline(), TimelineSample.FROM_PB_FUNCTION);
          }
          if (statisticsPb.getQuery().getSchema() != null) {
            this.schema = Schema.fromPb(statisticsPb.getQuery().getSchema());
          }
          if (statisticsPb.getQuery().getDmlStats() != null) {
            this.dmlStats = DmlStats.fromPb(statisticsPb.getQuery().getDmlStats());
          }
        }
      }

      Builder setBillingTier(Integer billingTier) {
        this.billingTier = billingTier;
        return self();
      }

      Builder setCacheHit(Boolean cacheHit) {
        this.cacheHit = cacheHit;
        return self();
      }

      Builder setDDLOperationPerformed(String ddlOperationPerformed) {
        this.ddlOperationPerformed = ddlOperationPerformed;
        return self();
      }

      Builder setDDLTargetTable(TableId ddlTargetTable) {
        this.ddlTargetTable = ddlTargetTable;
        return self();
      }

      Builder setDDLTargetRoutine(RoutineId ddlTargetRoutine) {
        this.ddlTargetRoutine = ddlTargetRoutine;
        return self();
      }

      Builder setEstimatedBytesProcessed(Long estimatedBytesProcessed) {
        this.estimatedBytesProcessed = estimatedBytesProcessed;
        return self();
      }

      Builder setNumDmlAffectedRows(Long numDmlAffectedRows) {
        this.numDmlAffectedRows = numDmlAffectedRows;
        return self();
      }

      Builder setDmlStats(DmlStats dmlStats) {
        this.dmlStats = dmlStats;
        return self();
      }

      Builder setReferenceTables(List referencedTables) {
        this.referencedTables = referencedTables;
        return self();
      }

      Builder setStatementType(StatementType statementType) {
        this.statementType = statementType;
        return self();
      }

      Builder setStatementType(String strStatementType) {
        this.statementType = StatementType.valueOf(strStatementType);
        return self();
      }

      Builder setTotalBytesBilled(Long totalBytesBilled) {
        this.totalBytesBilled = totalBytesBilled;
        return self();
      }

      Builder setTotalBytesProcessed(Long totalBytesProcessed) {
        this.totalBytesProcessed = totalBytesProcessed;
        return self();
      }

      Builder setTotalPartitionsProcessed(Long totalPartitionsProcessed) {
        this.totalPartitionsProcessed = totalPartitionsProcessed;
        return self();
      }

      Builder setTotalSlotMs(Long totalSlotMs) {
        this.totalSlotMs = totalSlotMs;
        return self();
      }

      Builder setQueryPlan(List queryPlan) {
        this.queryPlan = queryPlan;
        return self();
      }

      Builder setTimeline(List timeline) {
        this.timeline = timeline;
        return self();
      }

      Builder setSchema(Schema schema) {
        this.schema = schema;
        return self();
      }

      @Override
      QueryStatistics build() {
        return new QueryStatistics(this);
      }
    }

    private QueryStatistics(Builder builder) {
      super(builder);
      this.billingTier = builder.billingTier;
      this.cacheHit = builder.cacheHit;
      this.ddlOperationPerformed = builder.ddlOperationPerformed;
      this.ddlTargetTable = builder.ddlTargetTable;
      this.ddlTargetRoutine = builder.ddlTargetRoutine;
      this.estimatedBytesProcessed = builder.estimatedBytesProcessed;
      this.numDmlAffectedRows = builder.numDmlAffectedRows;
      this.dmlStats = builder.dmlStats;
      this.referencedTables = builder.referencedTables;
      this.statementType = builder.statementType;
      this.totalBytesBilled = builder.totalBytesBilled;
      this.totalBytesProcessed = builder.totalBytesProcessed;
      this.totalPartitionsProcessed = builder.totalPartitionsProcessed;
      this.totalSlotMs = builder.totalSlotMs;
      this.queryPlan = builder.queryPlan;
      this.timeline = builder.timeline;
      this.schema = builder.schema;
    }

    /** Returns the billing tier for the job. */
    public Integer getBillingTier() {
      return billingTier;
    }

    /**
     * Returns whether the query result was fetched from the query cache.
     *
     * @see Query Caching
     */
    public Boolean getCacheHit() {
      return cacheHit;
    }

    /** [BETA] For DDL queries, returns the operation applied to the DDL target table. */
    public String getDdlOperationPerformed() {
      return ddlOperationPerformed;
    }

    /** [BETA] For DDL queries, returns the TableID of the targeted table. */
    public TableId getDdlTargetTable() {
      return ddlTargetTable;
    }

    /** [BETA] For DDL queries, returns the RoutineId of the targeted routine. */
    public RoutineId getDdlTargetRoutine() {
      return ddlTargetRoutine;
    }

    /** The original estimate of bytes processed for the job. */
    public Long getEstimatedBytesProcessed() {
      return estimatedBytesProcessed;
    }

    /**
     * The number of rows affected by a DML statement. Present only for DML statements INSERT,
     * UPDATE or DELETE.
     */
    public Long getNumDmlAffectedRows() {
      return numDmlAffectedRows;
    }

    /** Detailed statistics for DML statements. */
    public DmlStats getDmlStats() {
      return dmlStats;
    }

    /**
     * Referenced tables for the job. Queries that reference more than 50 tables will not have a
     * complete list.
     */
    public List getReferencedTables() {
      return referencedTables;
    }

    /**
     * [BETA] The type of query statement, if valid. Possible values include: SELECT INSERT UPDATE
     * DELETE CREATE_TABLE CREATE_TABLE_AS_SELECT DROP_TABLE CREATE_VIEW DROP_VIEW
     */
    public StatementType getStatementType() {
      return statementType;
    }

    /** Returns the total number of bytes billed for the job. */
    public Long getTotalBytesBilled() {
      return totalBytesBilled;
    }

    /** Returns the total number of bytes processed by the job. */
    public Long getTotalBytesProcessed() {
      return totalBytesProcessed;
    }

    /** Total number of partitions processed from all partitioned tables referenced in the job. */
    public Long getTotalPartitionsProcessed() {
      return totalPartitionsProcessed;
    }

    /** Returns the slot-milliseconds consumed by the query. */
    public Long getTotalSlotMs() {
      return totalSlotMs;
    }

    /**
     * Returns the query plan as a list of stages or {@code null} if a query plan is not available.
     * Each stage involves a number of steps that read from data sources, perform a series of
     * transformations on the input, and emit an output to a future stage (or the final result). The
     * query plan is available for a completed query job and is retained for 7 days.
     *
     * @see Query Plan
     */
    public List getQueryPlan() {
      return queryPlan;
    }

    /**
     * Return the timeline for the query, as a list of timeline samples. Each sample provides
     * information about the overall progress of the query. Information includes time of the sample,
     * progress reporting on active, completed, and pending units of work, as well as the cumulative
     * estimation of slot-milliseconds consumed by the query.
     */
    public List getTimeline() {
      return timeline;
    }

    /**
     * Returns the schema for the query result. Present only for successful dry run of non-legacy
     * SQL queries.
     */
    public Schema getSchema() {
      return schema;
    }

    @Override
    ToStringHelper toStringHelper() {
      return super.toStringHelper()
          .add("billingTier", billingTier)
          .add("cacheHit", cacheHit)
          .add("totalBytesBilled", totalBytesBilled)
          .add("totalBytesProcessed", totalBytesProcessed)
          .add("queryPlan", queryPlan)
          .add("timeline", timeline)
          .add("schema", schema);
    }

    @Override
    public final boolean equals(Object obj) {
      return obj == this
          || obj != null
              && obj.getClass().equals(QueryStatistics.class)
              && baseEquals((QueryStatistics) obj);
    }

    @Override
    public final int hashCode() {
      return Objects.hash(
          baseHashCode(),
          billingTier,
          cacheHit,
          totalBytesBilled,
          totalBytesProcessed,
          queryPlan,
          schema);
    }

    @Override
    com.google.api.services.bigquery.model.JobStatistics toPb() {
      JobStatistics2 queryStatisticsPb = new JobStatistics2();
      queryStatisticsPb.setBillingTier(billingTier);
      queryStatisticsPb.setCacheHit(cacheHit);
      queryStatisticsPb.setDdlOperationPerformed(ddlOperationPerformed);
      queryStatisticsPb.setEstimatedBytesProcessed(estimatedBytesProcessed);
      queryStatisticsPb.setTotalBytesBilled(totalBytesBilled);
      queryStatisticsPb.setTotalBytesProcessed(totalBytesProcessed);
      queryStatisticsPb.setTotalPartitionsProcessed(totalPartitionsProcessed);
      queryStatisticsPb.setTotalSlotMs(totalSlotMs);
      if (ddlTargetTable != null) {
        queryStatisticsPb.setDdlTargetTable(ddlTargetTable.toPb());
      }
      if (ddlTargetRoutine != null) {
        queryStatisticsPb.setDdlTargetRoutine(ddlTargetRoutine.toPb());
      }
      if (dmlStats != null) {
        queryStatisticsPb.setDmlStats(dmlStats.toPb());
      }
      if (referencedTables != null) {
        queryStatisticsPb.setReferencedTables(
            Lists.transform(referencedTables, TableId.TO_PB_FUNCTION));
      }
      if (statementType != null) {
        queryStatisticsPb.setStatementType(statementType.toString());
      }
      if (queryPlan != null) {
        queryStatisticsPb.setQueryPlan(Lists.transform(queryPlan, QueryStage.TO_PB_FUNCTION));
      }
      if (timeline != null) {
        queryStatisticsPb.setTimeline(Lists.transform(timeline, TimelineSample.TO_PB_FUNCTION));
      }
      if (schema != null) {
        queryStatisticsPb.setSchema(schema.toPb());
      }
      return super.toPb().setQuery(queryStatisticsPb);
    }

    static Builder newBuilder() {
      return new Builder();
    }

    @SuppressWarnings("unchecked")
    static QueryStatistics fromPb(
        com.google.api.services.bigquery.model.JobStatistics statisticPb) {
      return new Builder(statisticPb).build();
    }
  }

  /** A Google BigQuery Script statistics. */
  public static class ScriptStatistics {

    private static final long serialVersionUID = 1328768324537448161L;

    private final String evaluationKind;
    private final List stackFrames;

    public static class ScriptStackFrame {

      static final Function<
              com.google.api.services.bigquery.model.ScriptStackFrame, ScriptStackFrame>
          FROM_PB_FUNCTION =
              new Function<
                  com.google.api.services.bigquery.model.ScriptStackFrame, ScriptStackFrame>() {
                @NullableDecl
                @Override
                public ScriptStackFrame apply(
                    @NullableDecl
                        com.google.api.services.bigquery.model.ScriptStackFrame stackFrame) {
                  return ScriptStackFrame.fromPb(stackFrame);
                }
              };

      static final Function<
              ScriptStackFrame, com.google.api.services.bigquery.model.ScriptStackFrame>
          TO_PB_FUNCTION =
              new Function<
                  ScriptStackFrame, com.google.api.services.bigquery.model.ScriptStackFrame>() {
                @NullableDecl
                @Override
                public com.google.api.services.bigquery.model.ScriptStackFrame apply(
                    @NullableDecl ScriptStackFrame scriptStackFrame) {
                  return scriptStackFrame.toPb();
                }
              };

      private final Integer endColumn;
      private final Integer endLine;
      private final String procedureId;
      private final Integer startColumn;
      private final Integer startLine;
      private final String text;

      private ScriptStackFrame(Builder builder) {
        this.endColumn = builder.endColumn;
        this.endLine = builder.endLine;
        this.procedureId = builder.procedureId;
        this.startColumn = builder.startColumn;
        this.startLine = builder.startLine;
        this.text = builder.text;
      }

      static class Builder {

        private Integer endColumn;
        private Integer endLine;
        private String procedureId;
        private Integer startColumn;
        private Integer startLine;
        private String text;

        Builder setEndColumn(Integer endColumn) {
          this.endColumn = endColumn;
          return this;
        }

        Builder setEndLine(Integer endLine) {
          this.endLine = endLine;
          return this;
        }

        Builder setProcedureId(String procedureId) {
          this.procedureId = procedureId;
          return this;
        }

        Builder setStartColumn(Integer startColumn) {
          this.startColumn = startColumn;
          return this;
        }

        Builder setStartLine(Integer startLine) {
          this.startLine = startLine;
          return this;
        }

        Builder setText(String text) {
          this.text = text;
          return this;
        }

        ScriptStackFrame build() {
          return new ScriptStackFrame(this);
        }
      }

      /** Returns the end column. */
      public Integer getEndColumn() {
        return endColumn;
      }

      /** Returns the end line. */
      public Integer getEndLine() {
        return endLine;
      }

      /** Returns Name of the active procedure, empty if in a top-level script. */
      public String getProcedureId() {
        return procedureId;
      }

      /** Returns the start column */
      public Integer getStartColumn() {
        return startColumn;
      }

      /** Returns the start line. */
      public Integer getStartLine() {
        return startLine;
      }

      /** Returns Text of the current statement/expression. */
      public String getText() {
        return text;
      }

      ToStringHelper toStringHelper() {
        return MoreObjects.toStringHelper(this)
            .add("endColumn", endColumn)
            .add("endLine", endLine)
            .add("procedureId", procedureId)
            .add("startColumn", startColumn)
            .add("startLine", startLine)
            .add("text", text);
      }

      @Override
      public String toString() {
        return toStringHelper().toString();
      }

      @Override
      public boolean equals(Object obj) {
        return obj == this
            || obj != null
                && obj.getClass().equals(ScriptStackFrame.class)
                && Objects.equals(toPb(), ((ScriptStackFrame) obj).toPb());
      }

      @Override
      public int hashCode() {
        return Objects.hash(endColumn, endLine, procedureId, startColumn, startLine, text);
      }

      com.google.api.services.bigquery.model.ScriptStackFrame toPb() {
        com.google.api.services.bigquery.model.ScriptStackFrame stackFrame =
            new com.google.api.services.bigquery.model.ScriptStackFrame();
        stackFrame.setEndColumn(endColumn);
        stackFrame.setEndLine(endLine);
        stackFrame.setProcedureId(procedureId);
        stackFrame.setStartColumn(startColumn);
        stackFrame.setStartLine(startLine);
        stackFrame.setText(text);
        return stackFrame;
      }

      static Builder newBuilder() {
        return new Builder();
      }

      static ScriptStackFrame fromPb(
          com.google.api.services.bigquery.model.ScriptStackFrame stackFrame) {
        Builder builder = newBuilder();
        if (stackFrame.getEndColumn() != null) {
          builder.setEndColumn(stackFrame.getEndColumn());
        }
        if (stackFrame.getEndLine() != null) {
          builder.setEndLine(stackFrame.getEndLine());
        }
        if (stackFrame.getProcedureId() != null) {
          builder.setProcedureId(stackFrame.getProcedureId());
        }
        if (stackFrame.getStartColumn() != null) {
          builder.setStartColumn(stackFrame.getStartColumn());
        }
        if (stackFrame.getStartLine() != null) {
          builder.setStartLine(stackFrame.getStartLine());
        }
        if (stackFrame.getText() != null) {
          builder.setText(stackFrame.getText());
        }
        return builder.build();
      }
    }

    private ScriptStatistics(Builder builder) {
      this.evaluationKind = builder.evaluationKind;
      this.stackFrames = builder.stackFrames;
    }

    static class Builder {

      private String evaluationKind;
      private List stackFrames;

      private Builder() {}

      Builder setEvaluationKind(String evaluationKind) {
        this.evaluationKind = evaluationKind;
        return this;
      }

      Builder setStackFrames(List stackFrames) {
        this.stackFrames = stackFrames;
        return this;
      }

      ScriptStatistics build() {
        return new ScriptStatistics(this);
      }
    }

    static Builder newBuilder() {
      return new Builder();
    }

    /** Returns child job was a statement or expression */
    public String getEvaluationKind() {
      return evaluationKind;
    }

    /**
     * Stack trace showing the line/column/procedure name of each frame on the stack at the point
     * where the current evaluation happened. The leaf frame is first, the primary script is last.
     * Never empty.
     */
    public List getStackFrames() {
      return stackFrames;
    }

    ToStringHelper toStringHelper() {
      return MoreObjects.toStringHelper(this)
          .add("evaluationKind", evaluationKind)
          .add("stackFrames", stackFrames);
    }

    @Override
    public String toString() {
      return toStringHelper().toString();
    }

    @Override
    public boolean equals(Object obj) {
      return obj == this
          || obj != null
              && obj.getClass().equals(ScriptStatistics.class)
              && Objects.equals(toPb(), ((ScriptStatistics) obj).toPb());
    }

    @Override
    public int hashCode() {
      return Objects.hash(evaluationKind, stackFrames);
    }

    com.google.api.services.bigquery.model.ScriptStatistics toPb() {
      com.google.api.services.bigquery.model.ScriptStatistics scriptStatistics =
          new com.google.api.services.bigquery.model.ScriptStatistics();
      scriptStatistics.setEvaluationKind(evaluationKind);
      scriptStatistics.setStackFrames(
          Lists.transform(stackFrames, ScriptStackFrame.TO_PB_FUNCTION));
      return scriptStatistics;
    }

    static ScriptStatistics fromPb(
        com.google.api.services.bigquery.model.ScriptStatistics scriptStatistics) {
      Builder builder = newBuilder();
      if (scriptStatistics.getEvaluationKind() != null) {
        builder.setEvaluationKind(scriptStatistics.getEvaluationKind());
      }
      if (scriptStatistics.getStackFrames() != null) {
        builder.setStackFrames(
            Lists.transform(scriptStatistics.getStackFrames(), ScriptStackFrame.FROM_PB_FUNCTION));
      }
      return builder.build();
    }
  }

  /** ReservationUsage contains information about a job's usage of a single reservation. */
  public static class ReservationUsage {

    static final Function<
            com.google.api.services.bigquery.model.JobStatistics.ReservationUsage, ReservationUsage>
        FROM_PB_FUNCTION =
            new Function<
                com.google.api.services.bigquery.model.JobStatistics.ReservationUsage,
                ReservationUsage>() {
              @Override
              public ReservationUsage apply(
                  com.google.api.services.bigquery.model.JobStatistics.ReservationUsage usage) {
                return ReservationUsage.fromPb(usage);
              }
            };

    static final Function<
            ReservationUsage, com.google.api.services.bigquery.model.JobStatistics.ReservationUsage>
        TO_PB_FUNCTION =
            new Function<
                ReservationUsage,
                com.google.api.services.bigquery.model.JobStatistics.ReservationUsage>() {
              @Override
              public com.google.api.services.bigquery.model.JobStatistics.ReservationUsage apply(
                  ReservationUsage usage) {
                return usage.toPb();
              }
            };

    private final String name;
    private final Long slotMs;

    public static class Builder {

      private String name;
      private Long slotMs;

      private Builder() {};

      Builder setName(String name) {
        this.name = name;
        return this;
      }

      Builder setSlotMs(Long slotMs) {
        this.slotMs = slotMs;
        return this;
      }

      ReservationUsage build() {
        return new ReservationUsage(this);
      }
    }

    private ReservationUsage(Builder builder) {
      this.name = builder.name;
      this.slotMs = builder.slotMs;
    }

    // Return mame indicates the utilized reservation name, or "unreserved" for ondemand usage.
    public String getName() {
      return name;
    }

    // Returns slotMs reports the slot milliseconds utilized within in the given reservation.
    public Long getSlotMs() {
      return slotMs;
    }

    static Builder newBuilder() {
      return new Builder();
    }

    ToStringHelper toStringHelper() {
      return MoreObjects.toStringHelper(this).add("name", name).add("slotMs", slotMs);
    }

    @Override
    public String toString() {
      return toStringHelper().toString();
    }

    @Override
    public boolean equals(Object obj) {
      return obj == this
          || obj != null
              && obj.getClass().equals(ReservationUsage.class)
              && Objects.equals(toPb(), ((ReservationUsage) obj).toPb());
    }

    @Override
    public int hashCode() {
      return Objects.hash(name, slotMs);
    }

    com.google.api.services.bigquery.model.JobStatistics.ReservationUsage toPb() {
      com.google.api.services.bigquery.model.JobStatistics.ReservationUsage usage =
          new com.google.api.services.bigquery.model.JobStatistics.ReservationUsage();
      usage.setName(name);
      usage.setSlotMs(slotMs);
      return usage;
    }

    static ReservationUsage fromPb(
        com.google.api.services.bigquery.model.JobStatistics.ReservationUsage usage) {
      Builder builder = newBuilder();
      builder.setName(usage.getName());
      builder.setSlotMs(usage.getSlotMs());
      return builder.build();
    }
  }

  // TransactionInfo contains information about a multi-statement transaction that may have
  // associated with a job.
  public static class TransactionInfo {

    // TransactionID is the system-generated identifier for the transaction.
    private final String transactionId;

    public static class Builder {

      private String transactionId;

      private Builder() {};

      Builder setTransactionId(String transactionId) {
        this.transactionId = transactionId;
        return this;
      }

      TransactionInfo build() {
        return new TransactionInfo(this);
      }
    }

    private TransactionInfo(Builder builder) {
      this.transactionId = builder.transactionId;
    }

    public String getTransactionId() {
      return transactionId;
    }

    static Builder newbuilder() {
      return new Builder();
    }

    ToStringHelper toStringHelper() {
      return MoreObjects.toStringHelper(this).add("transactionId", transactionId);
    }

    @Override
    public String toString() {
      return toStringHelper().toString();
    }

    @Override
    public boolean equals(Object obj) {
      return obj == this
          || obj != null
              && obj.getClass().equals(TransactionInfo.class)
              && Objects.equals(toPb(), ((TransactionInfo) obj).toPb());
    }

    @Override
    public int hashCode() {
      return Objects.hash(transactionId);
    }

    com.google.api.services.bigquery.model.TransactionInfo toPb() {
      com.google.api.services.bigquery.model.TransactionInfo transactionInfo =
          new com.google.api.services.bigquery.model.TransactionInfo();
      transactionInfo.setTransactionId(transactionId);
      return transactionInfo;
    }

    static TransactionInfo fromPb(
        com.google.api.services.bigquery.model.TransactionInfo transactionInfo) {
      Builder builder = newbuilder();
      builder.setTransactionId(transactionInfo.getTransactionId());
      return builder.build();
    }
  }

  // SessionInfo contains information about the session if this job is part of one.
  public static class SessionInfo {

    // Id of the session
    private final String sessionId;

    public static class Builder {

      private String sessionId;

      private Builder() {};

      Builder setSessionId(String sessionId) {
        this.sessionId = sessionId;
        return this;
      }

      SessionInfo build() {
        return new SessionInfo(this);
      }
    }

    private SessionInfo(Builder builder) {
      this.sessionId = builder.sessionId;
    }

    public String getSessionId() {
      return sessionId;
    }

    static Builder newBuilder() {
      return new Builder();
    }

    ToStringHelper toStringHelper() {
      return MoreObjects.toStringHelper(this).add("sessionId", sessionId);
    }

    @Override
    public String toString() {
      return toStringHelper().toString();
    }

    @Override
    public boolean equals(Object obj) {
      return obj == this
          || obj != null
              && obj.getClass().equals(SessionInfo.class)
              && Objects.equals(toPb(), ((SessionInfo) obj).toPb());
    }

    @Override
    public int hashCode() {
      return Objects.hash(sessionId);
    }

    com.google.api.services.bigquery.model.SessionInfo toPb() {
      com.google.api.services.bigquery.model.SessionInfo sessionInfo =
          new com.google.api.services.bigquery.model.SessionInfo();
      sessionInfo.setSessionId(sessionId);
      return sessionInfo;
    }

    static SessionInfo fromPb(com.google.api.services.bigquery.model.SessionInfo sessionInfo) {
      SessionInfo.Builder builder = newBuilder();
      builder.setSessionId(sessionInfo.getSessionId());
      return builder.build();
    }
  }

  abstract static class Builder> {

    private Long creationTime;
    private Long endTime;
    private Long startTime;
    private Long numChildJobs;
    private String parentJobId;
    private ScriptStatistics scriptStatistics;
    private List reservationUsage;
    private TransactionInfo transactionInfo;
    private SessionInfo sessionInfo;

    protected Builder() {}

    protected Builder(com.google.api.services.bigquery.model.JobStatistics statisticsPb) {
      this.creationTime = statisticsPb.getCreationTime();
      this.endTime = statisticsPb.getEndTime();
      this.startTime = statisticsPb.getStartTime();
      this.numChildJobs = statisticsPb.getNumChildJobs();
      this.parentJobId = statisticsPb.getParentJobId();
      if (statisticsPb.getScriptStatistics() != null) {
        this.scriptStatistics = ScriptStatistics.fromPb(statisticsPb.getScriptStatistics());
      }
      if (reservationUsage != null) {
        this.reservationUsage =
            Lists.transform(statisticsPb.getReservationUsage(), ReservationUsage.FROM_PB_FUNCTION);
      }
      if (statisticsPb.getTransactionInfo() != null) {
        this.transactionInfo = TransactionInfo.fromPb(statisticsPb.getTransactionInfo());
      }
      if (statisticsPb.getSessionInfo() != null) {
        this.sessionInfo = SessionInfo.fromPb(statisticsPb.getSessionInfo());
      }
    }

    @SuppressWarnings("unchecked")
    protected B self() {
      return (B) this;
    }

    B setCreationTimestamp(Long creationTime) {
      this.creationTime = creationTime;
      return self();
    }

    B setEndTime(Long endTime) {
      this.endTime = endTime;
      return self();
    }

    B setStartTime(Long startTime) {
      this.startTime = startTime;
      return self();
    }

    abstract T build();
  }

  protected JobStatistics(Builder builder) {
    this.creationTime = builder.creationTime;
    this.endTime = builder.endTime;
    this.startTime = builder.startTime;
    this.numChildJobs = builder.numChildJobs;
    this.parentJobId = builder.parentJobId;
    this.scriptStatistics = builder.scriptStatistics;
    this.reservationUsage = builder.reservationUsage;
    this.transactionInfo = builder.transactionInfo;
    this.sessionInfo = builder.sessionInfo;
  }

  /** Returns the creation time of the job in milliseconds since epoch. */
  public Long getCreationTime() {
    return creationTime;
  }

  /**
   * Returns the end time of the job in milliseconds since epoch. Returns {@code null} if the job
   * has not finished yet.
   */
  public Long getEndTime() {
    return endTime;
  }

  /**
   * Returns the start time of the job in milliseconds since epoch. Returns {@code null} if the job
   * has not started yet.
   */
  public Long getStartTime() {
    return startTime;
  }

  /** Returns the number of child job executed. */
  public Long getNumChildJobs() {
    return numChildJobs;
  }

  /** Returns the parent job id of child job. */
  public String getParentJobId() {
    return parentJobId;
  }

  /** Returns the statistics for a child job of a script. */
  public ScriptStatistics getScriptStatistics() {
    return scriptStatistics;
  }

  /** ReservationUsage contains information about a job's usage of a single reservation. */
  public List getReservationUsage() {
    return reservationUsage;
  }

  /** Info indicates the transaction ID associated with the job, if any. */
  public TransactionInfo getTransactionInfo() {
    return transactionInfo;
  }

  /** Info of the session if this job is part of one. */
  public SessionInfo getSessionInfo() {
    return sessionInfo;
  }

  ToStringHelper toStringHelper() {
    return MoreObjects.toStringHelper(this)
        .add("creationTime", creationTime)
        .add("endTime", endTime)
        .add("startTime", startTime)
        .add("numChildJobs", numChildJobs)
        .add("parentJobId", parentJobId)
        .add("scriptStatistics", scriptStatistics)
        .add("reservationUsage", reservationUsage)
        .add("transactionInfo", transactionInfo)
        .add("sessionInfo", sessionInfo);
  }

  @Override
  public String toString() {
    return toStringHelper().toString();
  }

  final int baseHashCode() {
    return Objects.hash(
        creationTime,
        endTime,
        startTime,
        numChildJobs,
        parentJobId,
        scriptStatistics,
        reservationUsage,
        transactionInfo,
        sessionInfo);
  }

  final boolean baseEquals(JobStatistics jobStatistics) {
    return Objects.equals(toPb(), jobStatistics.toPb());
  }

  com.google.api.services.bigquery.model.JobStatistics toPb() {
    com.google.api.services.bigquery.model.JobStatistics statistics =
        new com.google.api.services.bigquery.model.JobStatistics();
    statistics.setCreationTime(creationTime);
    statistics.setEndTime(endTime);
    statistics.setStartTime(startTime);
    statistics.setNumChildJobs(numChildJobs);
    statistics.setParentJobId(parentJobId);
    if (scriptStatistics != null) {
      statistics.setScriptStatistics(scriptStatistics.toPb());
    }
    if (reservationUsage != null) {
      statistics.setReservationUsage(
          Lists.transform(reservationUsage, ReservationUsage.TO_PB_FUNCTION));
    }
    if (transactionInfo != null) {
      statistics.setTransactionInfo(transactionInfo.toPb());
    }
    if (sessionInfo != null) {
      statistics.setSessionInfo(sessionInfo.toPb());
    }
    return statistics;
  }

  @SuppressWarnings("unchecked")
  static  T fromPb(com.google.api.services.bigquery.model.Job jobPb) {
    JobConfiguration jobConfigPb = jobPb.getConfiguration();
    com.google.api.services.bigquery.model.JobStatistics statisticPb = jobPb.getStatistics();
    if (jobConfigPb.getLoad() != null) {
      return (T) LoadStatistics.fromPb(statisticPb);
    } else if (jobConfigPb.getExtract() != null) {
      return (T) ExtractStatistics.fromPb(statisticPb);
    } else if (jobConfigPb.getQuery() != null) {
      return (T) QueryStatistics.fromPb(statisticPb);
    } else if (jobConfigPb.getCopy() != null) {
      return (T) CopyStatistics.fromPb(statisticPb);
    } else {
      throw new IllegalArgumentException("unknown job configuration: " + jobConfigPb);
    }
  }
}




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