/**************************************************************************
 * AssignItemToSlot
 *
 * $Workfile$
 * $Revision: 1.8 $
 * $Date: 2004/10/21 08:02:19 $
 *
 * Copyright (C) 2001 CERN - European Organization for Nuclear Research
 * All rights reserved.
 **************************************************************************/

package com.c2kernel.lifecycle.instance.predefined;


import com.c2kernel.collection.Dependency;
import com.c2kernel.collection.MembershipException;
import com.c2kernel.common.InvalidDataException;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.entity.C2KLocalObject;
import com.c2kernel.lookup.AgentPath;
import com.c2kernel.persistency.ClusterStorage;
import com.c2kernel.persistency.ClusterStorageException;
import com.c2kernel.process.Gateway;
import com.c2kernel.utils.CastorHashMap;
import com.c2kernel.utils.Logger;

/**************************************************************************
 *
 * @author $Author: abranson $ $Date: 2004/10/21 08:02:19 $
 * @version $Revision: 1.8 $
 **************************************************************************/
public class AddMemberToCollection extends PredefinedStep
{
    /**************************************************************************
    * Constructor for Castor
    **************************************************************************/
    public AddMemberToCollection()
    {
        super();
    }


    /**
     * Generates a new slot in a Dependency for the given item
     * 
     * Params:
     * 0 - collection name
     * 1 - target entity key
     */
    @Override
	protected String runActivityLogic(AgentPath agent, int itemSysKey,
			int transitionID, String requestData) throws InvalidDataException {
    	
        String collName;
        int entityKey;
        Dependency dep;
        CastorHashMap props = null;

        Logger.msg(1, "AddMemberToCollection::request() - Starting.");

        // extract parameters
        try {
            String[] params = getDataList(requestData);
            collName = params[0];
            entityKey = Integer.parseInt(params[1]);
            if (params.length > 2)
            	props = (CastorHashMap)Gateway.getMarshaller().unmarshall(params[2]);
            
        } catch (Exception e) {
            throw new InvalidDataException("Invalid parameters", "");
        }

        // load collection
    	C2KLocalObject collObj;
		try {
			collObj = Gateway.getStorage().get(itemSysKey, ClusterStorage.COLLECTION+"/"+collName, null);
		} catch (ObjectNotFoundException ex) {
			throw new InvalidDataException("Collection '"+collName+"' not found in this Item", "");
		} catch (ClusterStorageException ex) {
			Logger.error(ex);
			throw new InvalidDataException("Error loading collection '\"+collName+\"': "+ex.getMessage(), "");
		}
    	if (!(collObj instanceof Dependency)) throw new InvalidDataException("AddMemberToCollection operates on Dependency collections only.", "");
        dep = (Dependency)collObj;

        // find member and assign entity
        try {
        	if (props == null)
        		dep.addMember(entityKey);
        	else
        		dep.addMember(entityKey, props, null);
        } catch (MembershipException e) {
            throw new InvalidDataException("Entity "+entityKey+" is the wrong type for this collection", "");
        }

		try {
            Gateway.getStorage().put(itemSysKey, dep, null);
        } catch (ClusterStorageException e) {
            Logger.error(e);
            throw new InvalidDataException("Error storing collection", "");
        }

        Logger.msg(1, "AddMemberToCollection::request() - DONE.");
        return requestData;
    }
}