code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  package org.openqa.selenium.remote.tracing.opentelemetry;
  
  import com.google.common.collect.ImmutableMap;
  import com.google.common.primitives.Primitives;
  import io.opentelemetry.api.common.Attributes;
  import io.opentelemetry.api.common.AttributesBuilder;
  import io.opentelemetry.api.trace.SpanContext;
  import io.opentelemetry.api.trace.StatusCode;
  import io.opentelemetry.api.trace.Tracer;
  import io.opentelemetry.context.Context;
  import io.opentelemetry.context.Scope;
  import java.util.Map;
  import java.util.Objects;
  import org.openqa.selenium.internal.Require;
  import org.openqa.selenium.remote.tracing.EventAttributeValue;
  import org.openqa.selenium.remote.tracing.Span;
  import org.openqa.selenium.remote.tracing.Status;
  
  class OpenTelemetrySpan extends OpenTelemetryContext implements AutoCloseable, Span {
  
    private final io.opentelemetry.api.trace.Span span;
    private final Scope scope;
  
    public OpenTelemetrySpan(
        Tracer tracer, Context context, io.opentelemetry.api.trace.Span span, Scope scope) {
      super(tracer, context);
      this.span = Require.nonNull("Span", span);
      this.scope = Require.nonNull("Scope", scope);
    }
  
    @Override
    public Span setName(String name) {
      span.updateName(Require.nonNull("Name to update to", name));
      return this;
    }
  
    @Override
    public Span setAttribute(String key, boolean value) {
      span.setAttribute(Require.nonNull("Key", key), value);
      return this;
    }
  
    @Override
    public Span setAttribute(String key, Number value) {
      Require.nonNull("Key", key);
      Require.nonNull("Value", value);
  
      Class<? extends Number> unwrapped = Primitives.unwrap(value.getClass());
      if (double.class.equals(unwrapped) || float.class.equals(unwrapped)) {
        span.setAttribute(key, value.doubleValue());
      } else {
        span.setAttribute(key, value.longValue());
      }
  
      return this;
    }
  
    @Override
    public Span setAttribute(String key, String value) {
      Require.nonNull("Key", key);
      Require.nonNull("Value", value);
      span.setAttribute(key, value);
      return this;
    }
  
    @Override
    public Span addEvent(String name) {
      Require.nonNull("Name", name);
      span.addEvent(name);
      return this;
    }
  
    @Override
    public Span addEvent(String name, Map<String, EventAttributeValue> attributeMap) {
      Require.nonNull("Name", name);
      Require.nonNull("Event Attribute Map", attributeMap);
      AttributesBuilder otAttributes = Attributes.builder();
  
      attributeMap.forEach(
          (key, value) -> {
            Require.nonNull("Event Attribute Value", value);
            switch (value.getAttributeType()) {
              case BOOLEAN:
                otAttributes.put(key, value.getBooleanValue());
                break;
  
              case BOOLEAN_ARRAY:
                otAttributes.put(key, value.getBooleanArrayValue());
                break;
  
              case DOUBLE:
                otAttributes.put(key, value.getNumberValue().doubleValue());
                break;
  
              case DOUBLE_ARRAY:
                otAttributes.put(key, value.getDoubleArrayValue());
                break;
  
              case LONG:
                otAttributes.put(key, value.getNumberValue().longValue());
                break;
  
              case LONG_ARRAY:
                otAttributes.put(key, value.getLongArrayValue());
                break;
  
              case STRING:
                otAttributes.put(key, value.getStringValue());
                break;
  
              case STRING_ARRAY:
                otAttributes.put(key, value.getStringArrayValue());
                break;
  
              default:
                throw new IllegalArgumentException(
                    "Unrecognized event attribute value type: " + value.getAttributeType());
            }
          });
  
      span.addEvent(name, otAttributes.build());
      return this;
    }
  
    private static final Map<Status.Kind, StatusCode> statuses =
        new ImmutableMap.Builder<Status.Kind, StatusCode>()
            .put(Status.Kind.ABORTED, StatusCode.ERROR)
            .put(Status.Kind.CANCELLED, StatusCode.ERROR)
            .put(Status.Kind.NOT_FOUND, StatusCode.ERROR)
            .put(Status.Kind.OK, StatusCode.OK)
            .put(Status.Kind.RESOURCE_EXHAUSTED, StatusCode.ERROR)
            .put(Status.Kind.UNKNOWN, StatusCode.ERROR)
            .put(Status.Kind.INVALID_ARGUMENT, StatusCode.ERROR)
            .put(Status.Kind.DEADLINE_EXCEEDED, StatusCode.ERROR)
            .put(Status.Kind.ALREADY_EXISTS, StatusCode.ERROR)
            .put(Status.Kind.PERMISSION_DENIED, StatusCode.ERROR)
            .put(Status.Kind.OUT_OF_RANGE, StatusCode.ERROR)
            .put(Status.Kind.UNIMPLEMENTED, StatusCode.ERROR)
            .put(Status.Kind.INTERNAL, StatusCode.ERROR)
            .put(Status.Kind.UNAVAILABLE, StatusCode.ERROR)
            .put(Status.Kind.UNAUTHENTICATED, StatusCode.ERROR)
            .build();
  
    @Override
    public Span setStatus(Status status) {
      Require.nonNull("Status", status);
  
      StatusCode statusCode = statuses.get(status.getKind());
      if (statusCode == null) {
        throw new IllegalArgumentException("Unrecognized status kind: " + status.getKind());
      }
  
      span.setStatus(
          statusCode,
          "Kind: " + status.getKind().toString() + " Description:" + status.getDescription());
  
      return this;
    }
  
    @Override
    public void close() {
      scope.close();
      span.end();
    }
  
    @Override
    public String toString() {
      SpanContext context = span.getSpanContext();
  
      return "OpenTelemetrySpan{traceId="
          + context.getTraceId()
          + ",spanId="
          + context.getSpanId()
          + "}";
    }
  
    @Override
    public boolean equals(Object o) {
      if (o instanceof OpenTelemetryContext && (!(o instanceof OpenTelemetrySpan))) {
        return false;
      }
  
      if (!(o instanceof OpenTelemetrySpan)) {
        return false;
      }
  
      OpenTelemetrySpan that = (OpenTelemetrySpan) o;
      SpanContext thisContext = this.span.getSpanContext();
      SpanContext thatContext = that.span.getSpanContext();
  
      return Objects.equals(thisContext.getSpanId(), thatContext.getSpanId())
          && Objects.equals(thisContext.getTraceId(), thatContext.getTraceId());
    }
  
    @Override
    public int hashCode() {
      return Objects.hash(span);
    }
  }
  