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    • com.github.dakusui.actionunit.connectors.Pipe Maven / Gradle / Ivy

    package com.github.dakusui.actionunit.connectors;

import com.github.dakusui.actionunit.Context;
import com.github.dakusui.actionunit.Utils;

import java.util.LinkedList;
import java.util.List;

/**
 * Executes an operation based on an input value and gives an output value.
 *
 * @param  Type of input value
 * @param  Type of output value
 */
public interface Pipe {
  O apply(I input, Context context);

  abstract class Base implements Pipe {
    private final String description;

    protected Base(String description) {
      this.description = description;
    }

    protected Base() {
      this(null);
    }

    @Override
    public O apply(I input, Context context) {
      List args = new LinkedList<>();
      Context parent = context.getParent();
      while (parent.getParent() != null) {
        args.add(parent.value());
        parent = parent.getParent();
      }
      return this.apply(input, args.toArray());
    }

    /**
     * Applies this pipe to {@code input}.
     *
     * @param input An input to apply this object.
     * @param outer Inputs from outer {@code With} actions.
     */
    abstract protected O apply(I input, Object... outer);

    @Override
    public String toString() {
      return Utils.nonameIfNull(this.description);
    }
  }
}
    
    
    
    

    




    
    
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