code: //==============================================================================
  //	
  //	Copyright (c) 2002-
  //	Authors:
  //	* Dave Parker <d.a.parker@cs.bham.ac.uk> (University of Birmingham/Oxford)
  //	
  //------------------------------------------------------------------------------
  //	
  //	This file is part of PRISM.
  //	
  //	PRISM is free software; you can redistribute it and/or modify
  //	it under the terms of the GNU General Public License as published by
  //	the Free Software Foundation; either version 2 of the License, or
  //	(at your option) any later version.
  //	
  //	PRISM 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 General Public License for more details.
  //	
  //	You should have received a copy of the GNU General Public License
  //	along with PRISM; if not, write to the Free Software Foundation,
  //	Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  //	
  //==============================================================================
  
  package parser.ast;
  
  import java.util.Vector;
  
  import parser.visitor.*;
  import prism.PrismLangException;
  
  public class SystemParallel extends SystemDefn
  {
  	// Pair of operands
  	private SystemDefn operand1;
  	private SystemDefn operand2;
  	// Vector of synchronising actions
  	private Vector<String> actions;
  	
  	// Constructors
  	
  	public SystemParallel()
  	{
  		actions = new Vector<String>();
  	}
  	
  	public SystemParallel(SystemDefn s1, SystemDefn s2)
  	{
  		operand1 = s1;
  		operand2 = s2;
  		actions = new Vector<String>();
  	}
  	
  	// Set methods
  	
  	public void setOperand1(SystemDefn s1)
  	{
  		operand1 = s1;
  	}
  	
  	public void setOperand2(SystemDefn s2)
  	{
  		operand2 = s2;
  	}
  	
  	public void addAction(String s)
  	{
  		actions.addElement(s);
  	}
  		
  	public void setAction(int i, String s)
  	{
  		actions.setElementAt(s, i);
  	}
  			
  	// Get methods
  	
  	public SystemDefn getOperand1()
  	{
  		return operand1;
  	}
  	
  	public SystemDefn getOperand2()
  	{
  		return operand2;
  	}
  
  	public int getNumActions()
  	{
  		return actions.size();
  	}
  	
  	public String getAction(int i)
  	{
  		return actions.elementAt(i);
  	}
  		
  	public boolean containsAction(String s)
  	{
  		return actions.contains(s);
  	}
  		
  	// Methods required for SystemDefn (all subclasses should implement):
  	
  	@Override
  	@SuppressWarnings("deprecation")
  	public void getModules(Vector<String> v)
  	{
  		operand1.getModules(v);
  		operand2.getModules(v);
  	}
  
  	@Override
  	public void getModules(Vector<String> v, ModulesFile modulesFile)
  	{
  		operand1.getModules(v, modulesFile);
  		operand2.getModules(v, modulesFile);
  	}
  
  	@Override
  	@SuppressWarnings("deprecation")
  	public void getSynchs(Vector<String> v)
  	{
  		operand1.getSynchs(v);
  		operand2.getSynchs(v);
  	}
  	
  	@Override
  	public void getSynchs(Vector<String> v, ModulesFile modulesFile)
  	{
  		operand1.getSynchs(v, modulesFile);
  		operand2.getSynchs(v, modulesFile);
  	}
  	
  	@Override
  	public void getReferences(Vector<String> v)
  	{
  		operand1.getReferences(v);
  		operand2.getReferences(v);
  	}
  	
  	// Methods required for ASTElement:
  	
  	@Override
  	public Object accept(ASTVisitor v) throws PrismLangException
  	{
  		return v.visit(this);
  	}
  	
  	@Override
  	public String toString()
  	{
  		int i, n;
  		String s = "";
  		
  		s = s + operand1 + " |[";
  		n = getNumActions();
  		for (i = 0; i < n-1; i++) {
  			s = s + getAction(i) + ",";
  		}
  		if (n > 0) {
  			s = s + getAction(n-1);
  		}
  		s = s + "]| " + operand2;
  		
  		return s;
  	}
  	
  	@Override
  	@SuppressWarnings("unchecked")
  	public SystemDefn deepCopy()
  	{
  		SystemParallel ret = new SystemParallel();
  		ret.setOperand1(getOperand1().deepCopy());
  		ret.setOperand2(getOperand2().deepCopy());
  		ret.actions = (actions == null) ? null : (Vector<String>)actions.clone();
  		ret.setPosition(this);
  		return ret;
  	}
  }
  
  //------------------------------------------------------------------------------
  