io.github.oliviercailloux.grade.MinAggregator Maven / Gradle / Ivy

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package io.github.oliviercailloux.grade;

import com.google.common.base.MoreObjects;
import java.util.Objects;
import java.util.stream.Stream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public final class MinAggregator implements OwaWeighter {
  @SuppressWarnings("unused")
  private static final Logger LOGGER = LoggerFactory.getLogger(MinAggregator.class);

  public static final MinAggregator INSTANCE = new MinAggregator();

  private MinAggregator() {}

  @Override
  public Stream weights(int size) {
    if (size == 0) {
      return Stream.empty();
    }
    return Stream.concat(Stream.generate(() -> 0d).limit(size - 1), Stream.of(1d));
  }

  @Override
  public boolean equals(Object o2) {
    if (!(o2 instanceof MinAggregator)) {
      return false;
    }
    return true;
  }

  @Override
  public int hashCode() {
    return Objects.hash(this.getClass());
  }

  @Override
  public String toString() {
    return MoreObjects.toStringHelper(this).toString();
  }
}