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/**
 * Copyright (C) 2011-2012 BonitaSoft S.A.
 * BonitaSoft, 31 rue Gustave Eiffel - 38000 Grenoble
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation
 * version 2.1 of the License.
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA  02110-1301, USA.
 **/
package org.ow2.bonita.facade.runtime.command;

import org.ow2.bonita.definition.activity.AbstractActivity;
import org.ow2.bonita.env.Environment;
import org.ow2.bonita.facade.def.InternalActivityDefinition;
import org.ow2.bonita.facade.exception.ActivityNotFoundException;
import org.ow2.bonita.facade.runtime.ActivityInstance;
import org.ow2.bonita.facade.runtime.ActivityState;
import org.ow2.bonita.facade.runtime.impl.InternalActivityInstance;
import org.ow2.bonita.facade.uuid.ActivityInstanceUUID;
import org.ow2.bonita.runtime.event.EventConstants;
import org.ow2.bonita.runtime.model.Execution;
import org.ow2.bonita.util.BonitaConstants;
import org.ow2.bonita.util.Command;
import org.ow2.bonita.util.EnvTool;

/**
 * 
 * @author Charles Souillard, Matthieu Chaffotte
 *
 */
public class ReplayCommand implements Command{

	private static final long serialVersionUID = -2748779080782099313L;

	protected ActivityInstanceUUID myActivityUUID;

	public ReplayCommand(ActivityInstanceUUID activityUUID){
		this.myActivityUUID = activityUUID;
	}

	public Boolean execute(Environment env) throws Exception {
		final InternalActivityInstance activityInstance = EnvTool.getJournalQueriers().getActivityInstance(this.myActivityUUID);
		if (activityInstance==null) {
			throw new ActivityNotFoundException("R1", this.myActivityUUID);
		}
		if (activityInstance.getState() == ActivityState.FAILED) {
			// Set activityInstance state to READY
			activityInstance.setActivityState(ActivityState.READY, BonitaConstants.SYSTEM_USER);
			// Execute the activity Instance
			final Execution internalExecution = getExecution(activityInstance);
			final InternalActivityDefinition activityDef = internalExecution.getNode();       
			final AbstractActivity abstractActivity = (AbstractActivity) activityDef.getBehaviour();
			abstractActivity.signal(internalExecution, EventConstants.ASYNC, null);
			return true;
		}
		return false;
	}

	protected static Execution getExecution(final ActivityInstance activityInstance) throws ActivityNotFoundException {
		return EnvTool.getJournalQueriers().getExecutionOnActivity(activityInstance.getProcessInstanceUUID(), activityInstance.getUUID());
	}

}