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A library to build 'action' structure for testing

There is a newer version: 6.0.1

package com.github.dakusui.actionunit.core;

import com.github.dakusui.actionunit.actions.*;

import java.util.Formattable;

public interface Action extends Formattable {
  void accept(Visitor visitor);


  abstract class Builder {
    public abstract A build();

    /**
     * A synonym of {@code build()} method. This method is defined not to use a
     * method name 'build', which introduces extra word not relating to what is
     * being achieved.
     * 
     * If you prefer a word 'build' in your code, simply use {@code build}
     * method.
     *
     * @return An object built by {@code build} method.
     */
    public final A $() {
      return build();
    }
  }

  interface Visitor {
    @SuppressWarnings("unused")
    default void visit(Action action) {
      throw new UnsupportedOperationException();
    }

    default void visit(Leaf action) {
      this.visit((Action) action);
    }

    default void visit(Named action) {
      this.visit((Action) action);
    }

    default void visit(Composite action) {
      this.visit((Action) action);
    }

    default  void visit(ForEach action) {
      this.visit((Action) action);
    }

    default void visit(While action) {
      this.visit((Action) action);
    }

    default void visit(When action) {
      this.visit((Action) action);
    }

    default  void visit(With action) {
      this.visit((Action) action);
    }

    default void visit(Attempt action) {
      this.visit((Action) action);
    }

    default void visit(Retry action) {
      this.visit((Action) action);
    }

    default void visit(TimeOut action) {
      this.visit((Action) action);
    }

    default void visit(Ensured action) {
      this.visit((Action) action);
    }
  }
}