// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: google/spanner/v1/spanner.proto

package com.google.spanner.v1;

/**
 * <pre>
 * A session in the Cloud Spanner API.
 * </pre>
 *
 * Protobuf type {@code google.spanner.v1.Session}
 */
public  final class Session extends
    com.google.protobuf.GeneratedMessageV3 implements
    // @@protoc_insertion_point(message_implements:google.spanner.v1.Session)
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private static final long serialVersionUID = 0L;
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  public static final com.google.protobuf.Descriptors.Descriptor
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  protected com.google.protobuf.MapField internalGetMapField(
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  public static final int NAME_FIELD_NUMBER = 1;
  private volatile java.lang.Object name_;
  /**
   * <pre>
   * The name of the session. This is always system-assigned; values provided
   * when creating a session are ignored.
   * </pre>
   *
   * <code>string name = 1;</code>
   */
  public java.lang.String getName() {
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  /**
   * <pre>
   * The name of the session. This is always system-assigned; values provided
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   *
   * <code>string name = 1;</code>
   */
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  public static final int LABELS_FIELD_NUMBER = 2;
  private static final class LabelsDefaultEntryHolder {
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        java.lang.String, java.lang.String> defaultEntry =
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  private com.google.protobuf.MapField<
      java.lang.String, java.lang.String> labels_;
  private com.google.protobuf.MapField<java.lang.String, java.lang.String>
  internalGetLabels() {
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      return com.google.protobuf.MapField.emptyMapField(
          LabelsDefaultEntryHolder.defaultEntry);
    }
    return labels_;
  }

  public int getLabelsCount() {
    return internalGetLabels().getMap().size();
  }
  /**
   * <pre>
   * The labels for the session.
   *  * Label keys must be between 1 and 63 characters long and must conform to
   *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
   *  * Label values must be between 0 and 63 characters long and must conform
   *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
   *  * No more than 64 labels can be associated with a given session.
   * See https://goo.gl/xmQnxf for more information on and examples of labels.
   * </pre>
   *
   * <code>map&lt;string, string&gt; labels = 2;</code>
   */

  public boolean containsLabels(
      java.lang.String key) {
    if (key == null) { throw new java.lang.NullPointerException(); }
    return internalGetLabels().getMap().containsKey(key);
  }
  /**
   * Use {@link #getLabelsMap()} instead.
   */
  @java.lang.Deprecated
  public java.util.Map<java.lang.String, java.lang.String> getLabels() {
    return getLabelsMap();
  }
  /**
   * <pre>
   * The labels for the session.
   *  * Label keys must be between 1 and 63 characters long and must conform to
   *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
   *  * Label values must be between 0 and 63 characters long and must conform
   *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
   *  * No more than 64 labels can be associated with a given session.
   * See https://goo.gl/xmQnxf for more information on and examples of labels.
   * </pre>
   *
   * <code>map&lt;string, string&gt; labels = 2;</code>
   */

  public java.util.Map<java.lang.String, java.lang.String> getLabelsMap() {
    return internalGetLabels().getMap();
  }
  /**
   * <pre>
   * The labels for the session.
   *  * Label keys must be between 1 and 63 characters long and must conform to
   *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
   *  * Label values must be between 0 and 63 characters long and must conform
   *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
   *  * No more than 64 labels can be associated with a given session.
   * See https://goo.gl/xmQnxf for more information on and examples of labels.
   * </pre>
   *
   * <code>map&lt;string, string&gt; labels = 2;</code>
   */

  public java.lang.String getLabelsOrDefault(
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      java.lang.String defaultValue) {
    if (key == null) { throw new java.lang.NullPointerException(); }
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        internalGetLabels().getMap();
    return map.containsKey(key) ? map.get(key) : defaultValue;
  }
  /**
   * <pre>
   * The labels for the session.
   *  * Label keys must be between 1 and 63 characters long and must conform to
   *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
   *  * Label values must be between 0 and 63 characters long and must conform
   *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
   *  * No more than 64 labels can be associated with a given session.
   * See https://goo.gl/xmQnxf for more information on and examples of labels.
   * </pre>
   *
   * <code>map&lt;string, string&gt; labels = 2;</code>
   */

  public java.lang.String getLabelsOrThrow(
      java.lang.String key) {
    if (key == null) { throw new java.lang.NullPointerException(); }
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        internalGetLabels().getMap();
    if (!map.containsKey(key)) {
      throw new java.lang.IllegalArgumentException();
    }
    return map.get(key);
  }

  public static final int CREATE_TIME_FIELD_NUMBER = 3;
  private com.google.protobuf.Timestamp createTime_;
  /**
   * <pre>
   * Output only. The timestamp when the session is created.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp create_time = 3;</code>
   */
  public boolean hasCreateTime() {
    return createTime_ != null;
  }
  /**
   * <pre>
   * Output only. The timestamp when the session is created.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp create_time = 3;</code>
   */
  public com.google.protobuf.Timestamp getCreateTime() {
    return createTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : createTime_;
  }
  /**
   * <pre>
   * Output only. The timestamp when the session is created.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp create_time = 3;</code>
   */
  public com.google.protobuf.TimestampOrBuilder getCreateTimeOrBuilder() {
    return getCreateTime();
  }

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  private com.google.protobuf.Timestamp approximateLastUseTime_;
  /**
   * <pre>
   * Output only. The approximate timestamp when the session is last used. It is
   * typically earlier than the actual last use time.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
   */
  public boolean hasApproximateLastUseTime() {
    return approximateLastUseTime_ != null;
  }
  /**
   * <pre>
   * Output only. The approximate timestamp when the session is last used. It is
   * typically earlier than the actual last use time.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
   */
  public com.google.protobuf.Timestamp getApproximateLastUseTime() {
    return approximateLastUseTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : approximateLastUseTime_;
  }
  /**
   * <pre>
   * Output only. The approximate timestamp when the session is last used. It is
   * typically earlier than the actual last use time.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
   */
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  public static com.google.spanner.v1.Session parseFrom(
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  public Builder newBuilderForType() { return newBuilder(); }
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   * <pre>
   * A session in the Cloud Spanner API.
   * </pre>
   *
   * Protobuf type {@code google.spanner.v1.Session}
   */
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      internalGetMutableLabels().mergeFrom(
          other.internalGetLabels());
      if (other.hasCreateTime()) {
        mergeCreateTime(other.getCreateTime());
      }
      if (other.hasApproximateLastUseTime()) {
        mergeApproximateLastUseTime(other.getApproximateLastUseTime());
      }
      this.mergeUnknownFields(other.unknownFields);
      onChanged();
      return this;
    }

    public final boolean isInitialized() {
      return true;
    }

    public Builder mergeFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      com.google.spanner.v1.Session parsedMessage = null;
      try {
        parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        parsedMessage = (com.google.spanner.v1.Session) e.getUnfinishedMessage();
        throw e.unwrapIOException();
      } finally {
        if (parsedMessage != null) {
          mergeFrom(parsedMessage);
        }
      }
      return this;
    }
    private int bitField0_;

    private java.lang.Object name_ = "";
    /**
     * <pre>
     * The name of the session. This is always system-assigned; values provided
     * when creating a session are ignored.
     * </pre>
     *
     * <code>string name = 1;</code>
     */
    public java.lang.String getName() {
      java.lang.Object ref = name_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs =
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        name_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     * <pre>
     * The name of the session. This is always system-assigned; values provided
     * when creating a session are ignored.
     * </pre>
     *
     * <code>string name = 1;</code>
     */
    public com.google.protobuf.ByteString
        getNameBytes() {
      java.lang.Object ref = name_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        name_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     * <pre>
     * The name of the session. This is always system-assigned; values provided
     * when creating a session are ignored.
     * </pre>
     *
     * <code>string name = 1;</code>
     */
    public Builder setName(
        java.lang.String value) {
      if (value == null) {
    throw new NullPointerException();
  }
  
      name_ = value;
      onChanged();
      return this;
    }
    /**
     * <pre>
     * The name of the session. This is always system-assigned; values provided
     * when creating a session are ignored.
     * </pre>
     *
     * <code>string name = 1;</code>
     */
    public Builder clearName() {
      
      name_ = getDefaultInstance().getName();
      onChanged();
      return this;
    }
    /**
     * <pre>
     * The name of the session. This is always system-assigned; values provided
     * when creating a session are ignored.
     * </pre>
     *
     * <code>string name = 1;</code>
     */
    public Builder setNameBytes(
        com.google.protobuf.ByteString value) {
      if (value == null) {
    throw new NullPointerException();
  }
  checkByteStringIsUtf8(value);
      
      name_ = value;
      onChanged();
      return this;
    }

    private com.google.protobuf.MapField<
        java.lang.String, java.lang.String> labels_;
    private com.google.protobuf.MapField<java.lang.String, java.lang.String>
    internalGetLabels() {
      if (labels_ == null) {
        return com.google.protobuf.MapField.emptyMapField(
            LabelsDefaultEntryHolder.defaultEntry);
      }
      return labels_;
    }
    private com.google.protobuf.MapField<java.lang.String, java.lang.String>
    internalGetMutableLabels() {
      onChanged();;
      if (labels_ == null) {
        labels_ = com.google.protobuf.MapField.newMapField(
            LabelsDefaultEntryHolder.defaultEntry);
      }
      if (!labels_.isMutable()) {
        labels_ = labels_.copy();
      }
      return labels_;
    }

    public int getLabelsCount() {
      return internalGetLabels().getMap().size();
    }
    /**
     * <pre>
     * The labels for the session.
     *  * Label keys must be between 1 and 63 characters long and must conform to
     *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
     *  * Label values must be between 0 and 63 characters long and must conform
     *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
     *  * No more than 64 labels can be associated with a given session.
     * See https://goo.gl/xmQnxf for more information on and examples of labels.
     * </pre>
     *
     * <code>map&lt;string, string&gt; labels = 2;</code>
     */

    public boolean containsLabels(
        java.lang.String key) {
      if (key == null) { throw new java.lang.NullPointerException(); }
      return internalGetLabels().getMap().containsKey(key);
    }
    /**
     * Use {@link #getLabelsMap()} instead.
     */
    @java.lang.Deprecated
    public java.util.Map<java.lang.String, java.lang.String> getLabels() {
      return getLabelsMap();
    }
    /**
     * <pre>
     * The labels for the session.
     *  * Label keys must be between 1 and 63 characters long and must conform to
     *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
     *  * Label values must be between 0 and 63 characters long and must conform
     *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
     *  * No more than 64 labels can be associated with a given session.
     * See https://goo.gl/xmQnxf for more information on and examples of labels.
     * </pre>
     *
     * <code>map&lt;string, string&gt; labels = 2;</code>
     */

    public java.util.Map<java.lang.String, java.lang.String> getLabelsMap() {
      return internalGetLabels().getMap();
    }
    /**
     * <pre>
     * The labels for the session.
     *  * Label keys must be between 1 and 63 characters long and must conform to
     *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
     *  * Label values must be between 0 and 63 characters long and must conform
     *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
     *  * No more than 64 labels can be associated with a given session.
     * See https://goo.gl/xmQnxf for more information on and examples of labels.
     * </pre>
     *
     * <code>map&lt;string, string&gt; labels = 2;</code>
     */

    public java.lang.String getLabelsOrDefault(
        java.lang.String key,
        java.lang.String defaultValue) {
      if (key == null) { throw new java.lang.NullPointerException(); }
      java.util.Map<java.lang.String, java.lang.String> map =
          internalGetLabels().getMap();
      return map.containsKey(key) ? map.get(key) : defaultValue;
    }
    /**
     * <pre>
     * The labels for the session.
     *  * Label keys must be between 1 and 63 characters long and must conform to
     *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
     *  * Label values must be between 0 and 63 characters long and must conform
     *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
     *  * No more than 64 labels can be associated with a given session.
     * See https://goo.gl/xmQnxf for more information on and examples of labels.
     * </pre>
     *
     * <code>map&lt;string, string&gt; labels = 2;</code>
     */

    public java.lang.String getLabelsOrThrow(
        java.lang.String key) {
      if (key == null) { throw new java.lang.NullPointerException(); }
      java.util.Map<java.lang.String, java.lang.String> map =
          internalGetLabels().getMap();
      if (!map.containsKey(key)) {
        throw new java.lang.IllegalArgumentException();
      }
      return map.get(key);
    }

    public Builder clearLabels() {
      internalGetMutableLabels().getMutableMap()
          .clear();
      return this;
    }
    /**
     * <pre>
     * The labels for the session.
     *  * Label keys must be between 1 and 63 characters long and must conform to
     *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
     *  * Label values must be between 0 and 63 characters long and must conform
     *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
     *  * No more than 64 labels can be associated with a given session.
     * See https://goo.gl/xmQnxf for more information on and examples of labels.
     * </pre>
     *
     * <code>map&lt;string, string&gt; labels = 2;</code>
     */

    public Builder removeLabels(
        java.lang.String key) {
      if (key == null) { throw new java.lang.NullPointerException(); }
      internalGetMutableLabels().getMutableMap()
          .remove(key);
      return this;
    }
    /**
     * Use alternate mutation accessors instead.
     */
    @java.lang.Deprecated
    public java.util.Map<java.lang.String, java.lang.String>
    getMutableLabels() {
      return internalGetMutableLabels().getMutableMap();
    }
    /**
     * <pre>
     * The labels for the session.
     *  * Label keys must be between 1 and 63 characters long and must conform to
     *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
     *  * Label values must be between 0 and 63 characters long and must conform
     *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
     *  * No more than 64 labels can be associated with a given session.
     * See https://goo.gl/xmQnxf for more information on and examples of labels.
     * </pre>
     *
     * <code>map&lt;string, string&gt; labels = 2;</code>
     */
    public Builder putLabels(
        java.lang.String key,
        java.lang.String value) {
      if (key == null) { throw new java.lang.NullPointerException(); }
      if (value == null) { throw new java.lang.NullPointerException(); }
      internalGetMutableLabels().getMutableMap()
          .put(key, value);
      return this;
    }
    /**
     * <pre>
     * The labels for the session.
     *  * Label keys must be between 1 and 63 characters long and must conform to
     *    the following regular expression: `[a-z]([-a-z0-9]*[a-z0-9])?`.
     *  * Label values must be between 0 and 63 characters long and must conform
     *    to the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.
     *  * No more than 64 labels can be associated with a given session.
     * See https://goo.gl/xmQnxf for more information on and examples of labels.
     * </pre>
     *
     * <code>map&lt;string, string&gt; labels = 2;</code>
     */

    public Builder putAllLabels(
        java.util.Map<java.lang.String, java.lang.String> values) {
      internalGetMutableLabels().getMutableMap()
          .putAll(values);
      return this;
    }

    private com.google.protobuf.Timestamp createTime_ = null;
    private com.google.protobuf.SingleFieldBuilderV3<
        com.google.protobuf.Timestamp, com.google.protobuf.Timestamp.Builder, com.google.protobuf.TimestampOrBuilder> createTimeBuilder_;
    /**
     * <pre>
     * Output only. The timestamp when the session is created.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp create_time = 3;</code>
     */
    public boolean hasCreateTime() {
      return createTimeBuilder_ != null || createTime_ != null;
    }
    /**
     * <pre>
     * Output only. The timestamp when the session is created.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp create_time = 3;</code>
     */
    public com.google.protobuf.Timestamp getCreateTime() {
      if (createTimeBuilder_ == null) {
        return createTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : createTime_;
      } else {
        return createTimeBuilder_.getMessage();
      }
    }
    /**
     * <pre>
     * Output only. The timestamp when the session is created.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp create_time = 3;</code>
     */
    public Builder setCreateTime(com.google.protobuf.Timestamp value) {
      if (createTimeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        createTime_ = value;
        onChanged();
      } else {
        createTimeBuilder_.setMessage(value);
      }

      return this;
    }
    /**
     * <pre>
     * Output only. The timestamp when the session is created.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp create_time = 3;</code>
     */
    public Builder setCreateTime(
        com.google.protobuf.Timestamp.Builder builderForValue) {
      if (createTimeBuilder_ == null) {
        createTime_ = builderForValue.build();
        onChanged();
      } else {
        createTimeBuilder_.setMessage(builderForValue.build());
      }

      return this;
    }
    /**
     * <pre>
     * Output only. The timestamp when the session is created.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp create_time = 3;</code>
     */
    public Builder mergeCreateTime(com.google.protobuf.Timestamp value) {
      if (createTimeBuilder_ == null) {
        if (createTime_ != null) {
          createTime_ =
            com.google.protobuf.Timestamp.newBuilder(createTime_).mergeFrom(value).buildPartial();
        } else {
          createTime_ = value;
        }
        onChanged();
      } else {
        createTimeBuilder_.mergeFrom(value);
      }

      return this;
    }
    /**
     * <pre>
     * Output only. The timestamp when the session is created.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp create_time = 3;</code>
     */
    public Builder clearCreateTime() {
      if (createTimeBuilder_ == null) {
        createTime_ = null;
        onChanged();
      } else {
        createTime_ = null;
        createTimeBuilder_ = null;
      }

      return this;
    }
    /**
     * <pre>
     * Output only. The timestamp when the session is created.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp create_time = 3;</code>
     */
    public com.google.protobuf.Timestamp.Builder getCreateTimeBuilder() {
      
      onChanged();
      return getCreateTimeFieldBuilder().getBuilder();
    }
    /**
     * <pre>
     * Output only. The timestamp when the session is created.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp create_time = 3;</code>
     */
    public com.google.protobuf.TimestampOrBuilder getCreateTimeOrBuilder() {
      if (createTimeBuilder_ != null) {
        return createTimeBuilder_.getMessageOrBuilder();
      } else {
        return createTime_ == null ?
            com.google.protobuf.Timestamp.getDefaultInstance() : createTime_;
      }
    }
    /**
     * <pre>
     * Output only. The timestamp when the session is created.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp create_time = 3;</code>
     */
    private com.google.protobuf.SingleFieldBuilderV3<
        com.google.protobuf.Timestamp, com.google.protobuf.Timestamp.Builder, com.google.protobuf.TimestampOrBuilder> 
        getCreateTimeFieldBuilder() {
      if (createTimeBuilder_ == null) {
        createTimeBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp, com.google.protobuf.Timestamp.Builder, com.google.protobuf.TimestampOrBuilder>(
                getCreateTime(),
                getParentForChildren(),
                isClean());
        createTime_ = null;
      }
      return createTimeBuilder_;
    }

    private com.google.protobuf.Timestamp approximateLastUseTime_ = null;
    private com.google.protobuf.SingleFieldBuilderV3<
        com.google.protobuf.Timestamp, com.google.protobuf.Timestamp.Builder, com.google.protobuf.TimestampOrBuilder> approximateLastUseTimeBuilder_;
    /**
     * <pre>
     * Output only. The approximate timestamp when the session is last used. It is
     * typically earlier than the actual last use time.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
     */
    public boolean hasApproximateLastUseTime() {
      return approximateLastUseTimeBuilder_ != null || approximateLastUseTime_ != null;
    }
    /**
     * <pre>
     * Output only. The approximate timestamp when the session is last used. It is
     * typically earlier than the actual last use time.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
     */
    public com.google.protobuf.Timestamp getApproximateLastUseTime() {
      if (approximateLastUseTimeBuilder_ == null) {
        return approximateLastUseTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : approximateLastUseTime_;
      } else {
        return approximateLastUseTimeBuilder_.getMessage();
      }
    }
    /**
     * <pre>
     * Output only. The approximate timestamp when the session is last used. It is
     * typically earlier than the actual last use time.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
     */
    public Builder setApproximateLastUseTime(com.google.protobuf.Timestamp value) {
      if (approximateLastUseTimeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        approximateLastUseTime_ = value;
        onChanged();
      } else {
        approximateLastUseTimeBuilder_.setMessage(value);
      }

      return this;
    }
    /**
     * <pre>
     * Output only. The approximate timestamp when the session is last used. It is
     * typically earlier than the actual last use time.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
     */
    public Builder setApproximateLastUseTime(
        com.google.protobuf.Timestamp.Builder builderForValue) {
      if (approximateLastUseTimeBuilder_ == null) {
        approximateLastUseTime_ = builderForValue.build();
        onChanged();
      } else {
        approximateLastUseTimeBuilder_.setMessage(builderForValue.build());
      }

      return this;
    }
    /**
     * <pre>
     * Output only. The approximate timestamp when the session is last used. It is
     * typically earlier than the actual last use time.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
     */
    public Builder mergeApproximateLastUseTime(com.google.protobuf.Timestamp value) {
      if (approximateLastUseTimeBuilder_ == null) {
        if (approximateLastUseTime_ != null) {
          approximateLastUseTime_ =
            com.google.protobuf.Timestamp.newBuilder(approximateLastUseTime_).mergeFrom(value).buildPartial();
        } else {
          approximateLastUseTime_ = value;
        }
        onChanged();
      } else {
        approximateLastUseTimeBuilder_.mergeFrom(value);
      }

      return this;
    }
    /**
     * <pre>
     * Output only. The approximate timestamp when the session is last used. It is
     * typically earlier than the actual last use time.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
     */
    public Builder clearApproximateLastUseTime() {
      if (approximateLastUseTimeBuilder_ == null) {
        approximateLastUseTime_ = null;
        onChanged();
      } else {
        approximateLastUseTime_ = null;
        approximateLastUseTimeBuilder_ = null;
      }

      return this;
    }
    /**
     * <pre>
     * Output only. The approximate timestamp when the session is last used. It is
     * typically earlier than the actual last use time.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
     */
    public com.google.protobuf.Timestamp.Builder getApproximateLastUseTimeBuilder() {
      
      onChanged();
      return getApproximateLastUseTimeFieldBuilder().getBuilder();
    }
    /**
     * <pre>
     * Output only. The approximate timestamp when the session is last used. It is
     * typically earlier than the actual last use time.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
     */
    public com.google.protobuf.TimestampOrBuilder getApproximateLastUseTimeOrBuilder() {
      if (approximateLastUseTimeBuilder_ != null) {
        return approximateLastUseTimeBuilder_.getMessageOrBuilder();
      } else {
        return approximateLastUseTime_ == null ?
            com.google.protobuf.Timestamp.getDefaultInstance() : approximateLastUseTime_;
      }
    }
    /**
     * <pre>
     * Output only. The approximate timestamp when the session is last used. It is
     * typically earlier than the actual last use time.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp approximate_last_use_time = 4;</code>
     */
    private com.google.protobuf.SingleFieldBuilderV3<
        com.google.protobuf.Timestamp, com.google.protobuf.Timestamp.Builder, com.google.protobuf.TimestampOrBuilder> 
        getApproximateLastUseTimeFieldBuilder() {
      if (approximateLastUseTimeBuilder_ == null) {
        approximateLastUseTimeBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp, com.google.protobuf.Timestamp.Builder, com.google.protobuf.TimestampOrBuilder>(
                getApproximateLastUseTime(),
                getParentForChildren(),
                isClean());
        approximateLastUseTime_ = null;
      }
      return approximateLastUseTimeBuilder_;
    }
    public final Builder setUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.setUnknownFieldsProto3(unknownFields);
    }

    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }


    // @@protoc_insertion_point(builder_scope:google.spanner.v1.Session)
  }

  // @@protoc_insertion_point(class_scope:google.spanner.v1.Session)
  private static final com.google.spanner.v1.Session DEFAULT_INSTANCE;
  static {
    DEFAULT_INSTANCE = new com.google.spanner.v1.Session();
  }

  public static com.google.spanner.v1.Session getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }

  private static final com.google.protobuf.Parser<Session>
      PARSER = new com.google.protobuf.AbstractParser<Session>() {
    public Session parsePartialFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return new Session(input, extensionRegistry);
    }
  };

  public static com.google.protobuf.Parser<Session> parser() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.protobuf.Parser<Session> getParserForType() {
    return PARSER;
  }

  public com.google.spanner.v1.Session getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }

}

