package cz.cuni.amis.pogamut.multi.communication.worldview.property;
   
   import java.io.Serializable;
   
   import cz.cuni.amis.pogamut.base.communication.worldview.object.WorldObjectId;
   import cz.cuni.amis.utils.HashCode;
   import cz.cuni.amis.utils.maps.HashMapMap;
   import cz.cuni.amis.utils.token.Token;
   import cz.cuni.amis.utils.token.Tokens;
  
  
  /**
   * Unique Id for each SharedProperty in the world.
   * PropertyId is dependent on WorldObjectId. 
   * @author srlok
   *
   */
  public class PropertyId implements Serializable {
  	
  	/**
  	 * 
  	 */
  	private static final long serialVersionUID = 7196633078273572529L;
  	
  	
  	private Token token;
  	private WorldObjectId objectId;
  	private int hashCode;
  	
  	private PropertyId(WorldObjectId objectId, Token token)
  	{
  		this.objectId = objectId;
  		this.token = token;
  		this.hashCode = new HashCode().add(objectId).add(token).getHash();
  	}
  	
  	private PropertyId(WorldObjectId objectId, String name)
  	{
  		this.objectId = objectId;
  		this.token = Tokens.get(name);
  		this.hashCode = new HashCode().add(objectId).add(token).getHash();
  	}
  	
  	private PropertyId(WorldObjectId objectId, long id)
  	{
  		this.objectId = objectId;
  		this.token = Tokens.get(id);
  		this.hashCode = new HashCode().add(objectId).add(token).getHash();
  	}
  	
  	/**
  	 * Returns id of the object, this property belongs to.
  	 * @return
  	 */
  	public WorldObjectId getWorldObjectId()
  	{
  		return this.objectId;
  	}
  	
  	public Token getPropertyToken() {
  		return token;
  	}
  	
  	private static HashMapMap<WorldObjectId,String,PropertyId> stringMap = new HashMapMap<WorldObjectId, String, PropertyId>();
  	
  	// TODO: [srlok] why we have longMap ... "123" != 123 !!!
  	private static HashMapMap<WorldObjectId,Long,PropertyId> longMap = new HashMapMap<WorldObjectId, Long, PropertyId>();
  	
  	@Override
  	public boolean equals(Object other)
  	{
  		if ( other == null) { return false; }
  		if ( ! (other instanceof PropertyId))
  		{
  			return false;
  		}
  		return ( (token.equals(((PropertyId)other).token)) && 
  				( objectId.equals(((PropertyId)other).objectId)));
  	}
  	
  	public String getStringId()
  	{
  		return objectId.getStringId() + "-" + token.getToken();
  	}
  	
  	@Override
  	public String toString()
  	{
  		return ("PropertyId[" + objectId.toString() + "," + getStringId() + "]");
  	}
  	
  	@Override
  	public int hashCode()
  	{
  		return hashCode;
  	}
  	
  	/**
  	 * Returns a new PropertyId object.
 	 * Method makes sure that there is only one instance for each (WorldObjectId,String) pair.
 	 * @param objectId
 	 * @param name
 	 * @return
 	 */
 	public static PropertyId get(WorldObjectId objectId, String name)
 	{
 		PropertyId value = stringMap.get(objectId, name);
 		if ( value != null)
 		{
 			return value;
 		}
 		value = new PropertyId(objectId, name);
 		stringMap.put(objectId, name, value);
 		return value;			
 	}
 	
 	/**
 	 * Returns a new PropertyId object.
 	 * Method makes sure that there is only one instance for each (WorldObjectId,long) pair.
 	 * @param objectId
 	 * @param id
 	 * @return
 	 */
 	public static PropertyId get(WorldObjectId objectId, long id)
 	{
 		PropertyId value = longMap.get(objectId, id);
 		if ( value != null)
 		{
 			return value;
 		}
 		value = new PropertyId(objectId, id);
 		longMap.put(objectId, id, value);
 		return value;
 		
 	}
 	
 	
 }