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.bidi;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  import java.util.concurrent.atomic.AtomicReference;
  import java.util.function.Consumer;
  import org.openqa.selenium.WebDriver;
  import org.openqa.selenium.bidi.log.BaseLogEntry;
  import org.openqa.selenium.bidi.log.ConsoleLogEntry;
  import org.openqa.selenium.bidi.log.FilterBy;
  import org.openqa.selenium.bidi.log.GenericLogEntry;
  import org.openqa.selenium.bidi.log.JavascriptLogEntry;
  import org.openqa.selenium.bidi.log.Log;
  import org.openqa.selenium.bidi.log.LogEntry;
  import org.openqa.selenium.bidi.log.LogLevel;
  import org.openqa.selenium.internal.Require;
  
  public class LogInspector implements AutoCloseable {
  
    private final Set<String> browsingContextIds;
  
    private final BiDi bidi;
  
    public LogInspector(WebDriver driver) {
      this(new HashSet<>(), driver);
    }
  
    public LogInspector(String browsingContextId, WebDriver driver) {
      this(Collections.singleton(Require.nonNull("Browsing context id", browsingContextId)), driver);
    }
  
    public LogInspector(Set<String> browsingContextIds, WebDriver driver) {
      Require.nonNull("WebDriver", driver);
      Require.nonNull("Browsing context id list", browsingContextIds);
  
      if (!(driver instanceof HasBiDi)) {
        throw new IllegalArgumentException("WebDriver instance must support BiDi protocol");
      }
  
      this.bidi = ((HasBiDi) driver).getBiDi();
      this.browsingContextIds = browsingContextIds;
    }
  
    @Deprecated
    public void onConsoleLog(Consumer<ConsoleLogEntry> consumer) {
      Consumer<LogEntry> logEntryConsumer =
          logEntry -> logEntry.getConsoleLogEntry().ifPresent(consumer);
  
      addLogEntryAddedListener(logEntryConsumer);
    }
  
    public void onConsoleEntry(Consumer<ConsoleLogEntry> consumer) {
      Consumer<LogEntry> logEntryConsumer =
          logEntry -> logEntry.getConsoleLogEntry().ifPresent(consumer);
  
      addLogEntryAddedListener(logEntryConsumer);
    }
  
    public void onConsoleEntry(Consumer<ConsoleLogEntry> consumer, FilterBy filter) {
      Consumer<LogEntry> logEntryConsumer =
          logEntry ->
              logEntry
                  .getConsoleLogEntry()
                  .ifPresent(
                      entry -> {
                        if (filter.getLevel() != null && entry.getLevel() == filter.getLevel()) {
                          consumer.accept(entry);
                        }
                      });
  
      addLogEntryAddedListener(logEntryConsumer);
    }
  
    public void onJavaScriptLog(Consumer<JavascriptLogEntry> consumer) {
      Consumer<LogEntry> logEntryConsumer =
          logEntry -> logEntry.getJavascriptLogEntry().ifPresent(consumer);
  
      addLogEntryAddedListener(logEntryConsumer);
    }
  
    public void onJavaScriptLog(Consumer<JavascriptLogEntry> consumer, FilterBy filter) {
      Consumer<LogEntry> logEntryConsumer =
          logEntry ->
              logEntry
                  .getJavascriptLogEntry()
                  .ifPresent(
                      entry -> {
                        if (filter.getLevel() != null && entry.getLevel() == filter.getLevel()) {
                          consumer.accept(entry);
                        }
                      });
  
      addLogEntryAddedListener(logEntryConsumer);
    }
  
    public void onJavaScriptException(Consumer<JavascriptLogEntry> consumer) {
      Consumer<LogEntry> logEntryConsumer =
          logEntry ->
              logEntry
                  .getJavascriptLogEntry()
                  .ifPresent(
                      entry -> {
                        if (entry.getLevel() == LogLevel.ERROR) {
                          consumer.accept(entry);
                        }
                      });
  
      addLogEntryAddedListener(logEntryConsumer);
    }
  
    public void onGenericLog(Consumer<GenericLogEntry> consumer) {
      Consumer<LogEntry> logEntryConsumer =
          logEntry -> logEntry.getGenericLogEntry().ifPresent(consumer);
  
      addLogEntryAddedListener(logEntryConsumer);
    }
  
    public void onGenericLog(Consumer<GenericLogEntry> consumer, FilterBy filter) {
      Consumer<LogEntry> logEntryConsumer =
          logEntry ->
              logEntry
                  .getGenericLogEntry()
                  .ifPresent(
                      entry -> {
                        if (filter.getLevel() != null && entry.getLevel() == filter.getLevel()) {
                          consumer.accept(entry);
                        }
                      });
  
      addLogEntryAddedListener(logEntryConsumer);
    }
  
    public void onLog(Consumer<LogEntry> consumer) {
      addLogEntryAddedListener(consumer);
    }
  
    public void onLog(Consumer<LogEntry> consumer, FilterBy filter) {
      Consumer<LogEntry> logEntryConsumer =
          logEntry -> {
            AtomicReference<BaseLogEntry> baseLogEntry = new AtomicReference<>();
  
            logEntry.getGenericLogEntry().ifPresent(baseLogEntry::set);
            logEntry.getConsoleLogEntry().ifPresent(baseLogEntry::set);
            logEntry.getJavascriptLogEntry().ifPresent(baseLogEntry::set);
  
            if (filter.getLevel() != null && baseLogEntry.get().getLevel() == filter.getLevel()) {
              consumer.accept(logEntry);
            }
          };
  
      addLogEntryAddedListener(logEntryConsumer);
    }
  
    private void addLogEntryAddedListener(Consumer<LogEntry> consumer) {
      if (browsingContextIds.isEmpty()) {
        this.bidi.addListener(Log.entryAdded(), consumer);
      } else {
        this.bidi.addListener(browsingContextIds, Log.entryAdded(), consumer);
      }
    }
  
    @Override
    public void close() {
      this.bidi.clearListener(Log.entryAdded());
    }
  }
  