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• 2.0.2
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• JoinAction.java

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com.googlecode.sarasvati.JoinAction Maven / Gradle / Ivy

/*
    This file is part of Sarasvati.

    Sarasvati is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    Sarasvati is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with Sarasvati.  If not, see .

    Copyright 2008 Paul Lorenz
*/
/**
 * Created on Apr 25, 2008
 */
package com.googlecode.sarasvati;

/**
 * A GuardAction is part of the response from a Node guard. It indicates
 * how an incoming {@link NodeToken} should be handled.
 *
 * @author Paul Lorenz
 * @see Node#guard(Engine, NodeToken)
 */
public enum JoinAction
{
  /**
   * Indicates that that join did not complete, and no action should be taken.
   */
  Nothing,

  /**
   * Indicates that the join completed, relevant arc tokens should be completed
   * and a new node token created.
   */
  Complete,

  /**
   * Indicates that the arc token should be merged as a parent of an existing
   * node token.
   */
  Merge;
}