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

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//
//   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 com.google.common.collect.ImmutableSortedSet;

import org.openqa.selenium.internal.Require;

import io.ous.jtoml.JToml;
import io.ous.jtoml.ParseException;
import io.ous.jtoml.Toml;
import io.ous.jtoml.TomlTable;

import java.io.IOException;
import java.io.Reader;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.Set;

public class TomlConfig implements Config {

  private final Toml toml;

  public TomlConfig(Reader reader) {
    try {
      toml = JToml.parse(reader);
    } catch (IOException e) {
      throw new ConfigException("Unable to read TOML.", e);
    } catch (ParseException e) {
      throw new ConfigException(
        e.getCause() +
        "\n Validate the config using https://www.toml-lint.com/. " +
        "\n Refer to https://toml.io/en/ for TOML usage guidance. ");
    }
  }

  public static Config from(Path path) {
    Require.nonNull("Path to read", path);

    try (Reader reader = Files.newBufferedReader(path)) {
      return new TomlConfig(reader);
    } catch (IOException e) {
      throw new ConfigException(String.format("Unable to parse: %s", path), e);
    }
  }

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

    if (!toml.containsKey(section)) {
      return Optional.empty();
    }

    Object raw = toml.get(section);
    if (!(raw instanceof TomlTable)) {
      throw new ConfigException(String.format("Section %s is not a section! %s", section, raw));
    }

    TomlTable table = toml.getTomlTable(section);

    Object value = table.getOrDefault(option, null);
    if (value == null) {
      return Optional.empty();
    }

    if (value instanceof Collection) {
      Collection collection = (Collection) value;
      // Case when an array of tables is used as config
      // https://toml.io/en/v1.0.0-rc.3#array-of-tables
      if (collection.stream().anyMatch(item -> item instanceof TomlTable)) {
        List toReturn = new ArrayList<>();
        collection.stream()
          .map(item -> (TomlTable)item)
          .forEach(tomlTable -> tomlTable.toMap().entrySet().stream()
            .map(entry -> String.format("%s=%s", entry.getKey(), entry.getValue()))
            .sorted()
            .forEach(toReturn::add));
        return Optional.of(toReturn);
      }
      List values = collection.stream()
        .filter(item -> (!(item instanceof Collection)))
        .map(String::valueOf)
        .collect(ImmutableList.toImmutableList());

      return Optional.of(values);
    }

    return Optional.of(ImmutableList.of(String.valueOf(value)));
  }

  @Override
  public Set getSectionNames() {
    return ImmutableSortedSet.copyOf(toml.keySet());
  }

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

    Object raw = toml.get(section);
    if (!(raw instanceof TomlTable)) {
      return ImmutableSortedSet.of();
    }

    return ImmutableSortedSet.copyOf(((TomlTable) raw).keySet());
  }
}