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// 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.logging;

import java.util.Collection;
import java.util.Comparator;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class LogCombiner {
  private static final Comparator LOG_ENTRY_TIMESTAMP_COMPARATOR =
      Comparator.comparingLong(LogEntry::getTimestamp);

  public static LogEntries combine(LogEntries... entries) {

    return new LogEntries(
        Stream.of(entries)
            .map(LogEntries::getAll)
            .flatMap(Collection::stream)
            .sorted(LOG_ENTRY_TIMESTAMP_COMPARATOR)
            .collect(Collectors.toList()));
  }
}