/**************************************************************************
 * 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 java.util.Arrays;
import java.util.UUID;

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.lookup.ItemPath;
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, ItemPath item,
			int transitionID, String requestData) throws InvalidDataException {
    	
        String collName;
        ItemPath newChild;
        Dependency dep;
        CastorHashMap props = null;

        // extract parameters
        String[] params = getDataList(requestData);
        if (Logger.doLog(3)) Logger.msg(3, "AddMemberToCollection: called by "+agent+" on "+item+" with parameters "+Arrays.toString(params));
        try {
            collName = params[0];
            newChild = new ItemPath(UUID.fromString(params[1]));
            if (params.length > 2)
            	props = (CastorHashMap)Gateway.getMarshaller().unmarshall(params[2]);
            
        } catch (Exception e) {
            throw new InvalidDataException("AddMemberToCollection: Invalid parameters "+Arrays.toString(params), "");
        }

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

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

		try {
            Gateway.getStorage().put(newChild, dep, null);
        } catch (ClusterStorageException e) {
        	throw unknownException(e);
        }
        return requestData;
    }
}