/**
    * 
    */
   package org.ximtec.igesture.core.composite;
   
   import java.util.HashSet;
   import java.util.Iterator;
   import java.util.List;
   import java.util.Set;
  import java.util.logging.Logger;
  
  import org.ximtec.igesture.core.Gesture;
  import org.ximtec.igesture.io.IDeviceManager;
  import org.ximtec.igesture.io.IUser;
  
  
  /**
   * This class represents a cardinality constraint. A certain gesture has to be performed between a mimimum and a maximum number 
   * of times within a certain time interval. The main example for this kind of constraint is defining a majority. 
   * Each user has only one vote.
   * 
   * @author Bjorn Puype, bpuype@gmail.com
   *
   */
  public class CardinalityUserConstraint extends CardinalityDeviceConstraint {
  
  	private static final Logger LOGGER = Logger.getLogger(CardinalityUserConstraint.class.getName());
  
  	public CardinalityUserConstraint() {
  		super();
  	}
  	
  	/* (non-Javadoc)
  	 * @see org.ximtec.igesture.core.composite.DefaultConstraint#validateConditions(java.util.List)
  	 */
  	@Override
  	public boolean validateConditions(List<Gesture<?>> gestures, IDeviceManager manager) {
  		boolean conditionsValid = super.validateConditions(gestures, manager);
  		
  		if(conditionsValid) // if previous conditions hold
  		{
  			
  			Set<IUser> users = new HashSet<IUser>();
  			
  			//check if all gestures were created by different users
  			for (Iterator iterator = gestures.iterator(); iterator.hasNext();) {
  				Gesture<?> gesture = (Gesture<?>) iterator.next();
  				IUser user = manager.getAssociatedUser(gesture.getSource());
  				users.add(user);
  			}
  			
  			if(users.size() != gestures.size())
  				conditionsValid = false;
  		}
  		
  		return conditionsValid;
  	}
  
  	public String toString()
  	{
  		return CardinalityUserConstraint.class.getSimpleName();
  	}
  	
  }