org.openqa.selenium.grid.config.CompoundConfig Maven / Gradle / Ivy

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// to you under the Apache License, Version 2.0 (the
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// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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package org.openqa.selenium.grid.config;

import com.google.common.collect.ImmutableList;

import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.Set;

import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.common.collect.ImmutableSortedSet.toImmutableSortedSet;
import static java.util.Comparator.naturalOrder;

import org.openqa.selenium.internal.Require;

public class CompoundConfig implements Config {

  private final List allConfigs;

  public CompoundConfig(Config... allConfigsInDescendingOrderOfImportance) {
    if (allConfigsInDescendingOrderOfImportance.length == 0) {
      throw new ConfigException("List of config files must be greater than 0.");
    }

    this.allConfigs = ImmutableList.copyOf(allConfigsInDescendingOrderOfImportance);
  }

  @Override
  public Optional> getAll(String section, String option) {
    Require.nonNull("Section name", section);
    Require.nonNull("Option name", option);

    List values = allConfigs.stream()
      .map(config -> config.getAll(section, option))
      .filter(Optional::isPresent)
      .map(Optional::get)
      .flatMap(Collection::stream)
      .collect(toImmutableList());

    return values.isEmpty() ? Optional.empty() : Optional.of(values);
  }

  @Override
  public Set getSectionNames() {
    return allConfigs.stream()
      .map(Config::getSectionNames)
      .flatMap(Collection::stream)
      .collect(toImmutableSortedSet(naturalOrder()));
  }

  @Override
  public Set getOptions(String section) {
    Require.nonNull("Section name to get options for", section);

    return allConfigs.stream()
      .map(config -> config.getOptions(section))
      .flatMap(Collection::stream)
      .collect(toImmutableSortedSet(naturalOrder()));
  }
}