context.java

Rakiura JFern是一个非常轻型的带有模拟器的Petri网络框架

// This is copyrighted source file, part of Rakiura JFern package. 
// See the file LICENSE for copyright information and the terms and conditions
// for copying, distributing and modifications of Rakiura JFern package.
// Copyright (C) 1999-2002 by Mariusz Nowostawski and others  [http://www.rakiura.org]

package org.rakiura.cpn;

/**/

/**
 * Represents public access protocol to CpnContexts.
 * 
 *<br><br>
 * Context.java<br>
 * Created: Tue Apr 23 22:24:35 2002<br>
 *
 *@author  <a href="[e-mail]">Mariusz</a>
 *@version 2.1.0 $Revision: 1.2 $ $Date: 2002/04/26 06:23:18 $
 *@since 2.0
 */
public interface Context {

  /**
   * Declares new variable in this context. 
   *@param aVariable new declared variable.
   */  
  void var(final String aVariable);

  /**
   * Declares new <code>n</code>anonymous 
   * variables in this context.  Anonymous variables cannot
   * be referenced directly, and are picked at random from the
   * input multiset.
   *@param aNumber <code>n</code>, number of anonymously 
   *  declared variables.
   */
  void var(final int aNumber);

  /**
   * Gets the variable value.
   *@param aVariable the variable name.
   *@return the value of the given variable in this context.
   */
  Object get(final String aVariable);

  /**
   * Gets the input multiset.
   *@return input multiset. For transitions, this input multiset is
   *    a union of all input arc expressions multiset.
   */
  Multiset getMultiset();
  

} // Context
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