package com.c2kernel.collection;

import java.util.StringTokenizer;

import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.entity.proxy.ItemProxy;
import com.c2kernel.graph.model.GraphableVertex;
import com.c2kernel.lookup.ItemPath;
import com.c2kernel.lookup.InvalidItemPathException;
import com.c2kernel.persistency.ClusterStorage;
import com.c2kernel.process.Gateway;
import com.c2kernel.property.Property;
import com.c2kernel.utils.Logger;

/**
* @version $Revision: 1.11 $ $Date: 2005/12/01 14:23:15 $
* @author  $Author: abranson $
*/


//this extends Vertex for inherit the graph visualization
//this does not implement MemberObject anylonger. it is a java object.
//eventually the member object corba interface will be phased out.
public class AggregationMember extends GraphableVertex implements CollectionMember
{

    private int                  mSystemKey    = -1;
    private ItemProxy          mItem       = null;
    private Aggregation          mCollection  = null;
	private String 			     mClassProps = null;
	String ItemName;


   /**************************************************************************
    *
    **************************************************************************/
    public AggregationMember()
    {
        super();
        mSystemKey = -1;
        mCollection = null;
    }

    @Override
	public void setSystemKey(int sysKey) {
        mSystemKey = sysKey;
        ItemName = null;
    }

    public void setCollection(Aggregation aggregation)
    {
        mCollection = aggregation;
    }

    @Override
	public void setClassProps(String props)
    {
        mClassProps = props;
    }

    @Override
	public int getSystemKey()
    {
        return mSystemKey;
    }

    public Aggregation getCollection()
    {
        return mCollection;
    }

    @Override
	public String getClassProps()
    {
        return mClassProps;
    }

    @Override
	public void assignItem(int sysKey) throws MembershipException
    {
        if (sysKey > -1) {
            if (mClassProps == null || getProperties() == null)
                throw new MembershipException("ClassProps not yet set. Cannot check membership validity.");

            //for each mandatory prop check if its in the member property and has the matching value
            StringTokenizer sub = new StringTokenizer(mClassProps, ",");
            while (sub.hasMoreTokens())
            {
                String aClassProp = sub.nextToken();
                try {
                    String memberValue = (String)getProperties().get(aClassProp);
                    Property ItemProperty = (Property)Gateway.getStorage().get(sysKey, ClusterStorage.PROPERTY+"/"+aClassProp, null);
                    if (ItemProperty == null)
                        throw new MembershipException("Property "+aClassProp+ " does not exist for sysKey=" + sysKey );
                    if (ItemProperty.getValue() == null || !ItemProperty.getValue().equalsIgnoreCase(memberValue))
                        throw new MembershipException("Value of mandatory prop "+aClassProp+" does not match: " + ItemProperty.getValue()+"!="+memberValue);
                 }
                catch (MembershipException ex) {
                    throw ex;
                }
                catch (Exception ex)
                {
                    Logger.error(ex);
                    throw new MembershipException("Error checking properties");
                }
            }
        }

        mSystemKey = sysKey;
        mItem       = null;
        ItemName    = null;
    }

    @Override
	public void clearItem() {
        mSystemKey = -1;
        mItem       = null;
    }

    @Override
	public ItemProxy resolveItem() throws ObjectNotFoundException {
        if (mItem == null) {
            try {
                ItemPath path = new ItemPath(mSystemKey);
                mItem = Gateway.getProxyManager().getProxy(path);
            } catch (InvalidItemPathException ex) {
                throw new ObjectNotFoundException("No member defined", "");
            }
        }
        return mItem;

    }

    public String getItemName() {
    	if (ItemName == null) {
    		if (mSystemKey > -1) {
        		try {
        			ItemName = resolveItem().getName();
        		} catch (ObjectNotFoundException ex) {
        			Logger.error(ex);
        			ItemName = "Error ("+mSystemKey+")";
        		}
    		}
    		else
    			ItemName = "Empty";
    	}

    	return ItemName;
    }

}