package com.c2kernel.collection;

import java.awt.Image;
import java.util.StringTokenizer;

import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.entity.proxy.EntityProxy;
import com.c2kernel.graph.model.GraphableVertex;
import com.c2kernel.lookup.EntityPath;
import com.c2kernel.lookup.InvalidEntityPathException;
import com.c2kernel.persistency.ClusterStorage;
import com.c2kernel.process.Gateway;
import com.c2kernel.property.Property;
import com.c2kernel.utils.Logger;
import com.c2kernel.utils.Resource;

/**
* @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                  mEntityKey    = -1;
    private EntityProxy          mEntity       = null;
    private Aggregation          mCollection  = null;
	private String 			     mClassProps = null;
	String entityName;
	Image image;


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

    @Override
	public void setEntityKey(int entityKey) {
        mEntityKey = entityKey;
        entityName = null;
    }

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

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

    @Override
	public int getEntityKey()
    {
        return mEntityKey;
    }

    public Aggregation getCollection()
    {
        return mCollection;
    }

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

    @Override
	public void assignEntity(int entityKey) throws MembershipException
    {
        if (entityKey > -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 entityProperty = (Property)Gateway.getStorage().get(entityKey, ClusterStorage.PROPERTY+"/"+aClassProp, null);
                    if (entityProperty == null)
                        throw new MembershipException("Property "+aClassProp+ " does not exist for entityKey=" + entityKey );
                    if (entityProperty.getValue() == null || !entityProperty.getValue().equalsIgnoreCase(memberValue))
                        throw new MembershipException("Value of mandatory prop "+aClassProp+" does not match: " + entityProperty.getValue()+"!="+memberValue);
                 }
                catch (MembershipException ex) {
                    throw ex;
                }
                catch (Exception ex)
                {
                    Logger.error(ex);
                    throw new MembershipException("Error checking properties");
                }
            }
        }

        mEntityKey = entityKey;
        mEntity       = null;
        entityName    = null;
    }

    @Override
	public void clearEntity() {
        mEntityKey = -1;
        mEntity       = null;
    }

    @Override
	public EntityProxy resolveEntity() throws ObjectNotFoundException {
        if (mEntity == null) {
            try {
                EntityPath path = new EntityPath(mEntityKey);
                mEntity = Gateway.getProxyManager().getProxy(path);
            } catch (InvalidEntityPathException ex) {
                throw new ObjectNotFoundException("No member defined", "");
            }
        }
        return mEntity;

    }

    public Image getImage() {
    	if (image == null) {
    		image = Resource.findImage("typeicons/"+getProperties().get("Type")+"_16.png").getImage();
    	}
    	return image;
    }

    public String getEntityName() {
    	if (entityName == null) {
    		if (mEntityKey > -1) {
        		try {
        			entityName = resolveEntity().getName();
        		} catch (ObjectNotFoundException ex) {
        			Logger.error(ex);
        			entityName = "Error ("+mEntityKey+")";
        		}
    		}
    		else
    			entityName = "Empty";
    	}

    	return entityName;
    }

}