net.pincette.rs.FlattenList Maven / Gradle / Ivy

Go to download
package net.pincette.rs;

import static net.pincette.rs.Box.box;
import static net.pincette.rs.Mapper.map;

import java.util.List;
import java.util.concurrent.Flow.Processor;
import java.util.function.Function;

/**
 * The processor emits the elements in the received lists individually. It uses a shared thread.
 *
 * @param  the value type.
 * @author Werner Donn\u00e9
 * @since 3.0
 */
public class FlattenList extends Buffered, T> {
  public FlattenList() {
    super(1);
  }

  /**
   * Returns a processor that emits the elements from the generated list individually.
   *
   * @param function the function that generates the list.
   * @param  the value type.
   * @return The processor
   */
  public static  Processor flatMapList(final Function> function) {
    return box(map(function), flattenList());
  }

  /**
   * Returns a processor that emits the elements in the received lists individually.
   *
   * @param  the value type.
   * @return The processor.
   */
  public static  Processor, T> flattenList() {
    return new FlattenList<>();
  }

  protected boolean onNextAction(final List list) {
    addValues(list);
    emit();

    return true;
  }
}