code: /*
   * Copyright (C) 2006-2015 Fabrizio Montesi <famontesi@gmail.com>
   *
   * This library 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 2.1 of the License, or (at your option) any later version.
   *
   * This library 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 this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   * MA 02110-1301  USA
   */
  
  package jolie.process;
  
  import jolie.ExecutionThread;
  import jolie.runtime.ExitingException;
  import jolie.runtime.FaultException;
  import jolie.runtime.expression.Expression;
  
  public final class IfProcess implements Process
  {
  	public static class CPPair
  	{
  		private final Expression condition;
  		private final Process process;
  		
  		public CPPair( Expression condition, Process process )
  		{
  			this.condition = condition;
  			this.process = process;
  		}
  		
  		public Expression condition()
  		{
  			return condition;
  		}
  		
  		public Process process()
  		{
  			return process;
  		}
  	}
  	
  	private final CPPair[] pairs;
  	private final Process elseProcess;
  	
  	public IfProcess( CPPair[] pairs, Process elseProcess )
  	{
  		this.pairs = pairs;
  		this.elseProcess = elseProcess;
  	}
  	
  	@Override
  	public Process clone( TransformationReason reason )
  	{
  		CPPair[] pairsCopy = new CPPair[ pairs.length ];
  		for( int i = 0; i < pairs.length; i++ ) {
  			pairsCopy[ i ] = new CPPair(
  				pairs[ i ].condition.cloneExpression( reason ),
  				pairs[ i ].process.clone( reason )
  			);
  		}
  		return new IfProcess(
  			pairsCopy,
  			( elseProcess == null ) ? null : elseProcess.clone( reason )
  		);
  	}
  	
  	@Override
  	public void run()
  		throws FaultException, ExitingException
  	{
  		if ( ExecutionThread.currentThread().isKilled() ) {
  			return;
  		}
  
  		boolean keepRun = true;
  		int i = 0;
  	
  		while( keepRun && i < pairs.length ) {
  			final CPPair pair = pairs[ i ];
  			if ( pair.condition().evaluate().boolValue() ) {
  				keepRun = false;
  				pair.process().run();
  			}
  			i++;
  		}
  
  		// No valid condition found, run the else process
  		if ( keepRun && elseProcess != null ) {
  			elseProcess.run();
  		}
  	}
  	
  	@Override
  	public boolean isKillable()
  	{
  		return true;
  	}
  }