/**
 * Copyright 2010 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.command.runtime.process;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

import org.drools.command.Context;
import org.drools.command.impl.GenericCommand;
import org.drools.command.impl.KnowledgeCommandContext;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.process.ProcessInstance;
import org.drools.xml.jaxb.util.JaxbUnknownAdapter;

@XmlAccessorType(XmlAccessType.NONE)
public class SignalEventCommand implements GenericCommand<Object> {
	
	@XmlAttribute(name="process-instance-id")
	private long processInstanceId = -1;
	
	@XmlAttribute(name="event-type", required=true)
	private String eventType;
	
	@XmlElement(name="event")
	@XmlJavaTypeAdapter(JaxbUnknownAdapter.class)
	private Object event;	
	
    public SignalEventCommand() {
    }   	
	
	public SignalEventCommand(String eventType,
                              Object event) {
        this.eventType = eventType;
        this.event = event;
    }	
	
    public SignalEventCommand(long processInstanceId,
                              String eventType,
                              Object event) {
        this.processInstanceId = processInstanceId;
        this.eventType = eventType;
        this.event = event;
    }


    public long getProcessInstanceId() {
        return processInstanceId;
    }

    public void setProcessInstanceId(long processInstanceId) {
        this.processInstanceId = processInstanceId;
    }

    public String getEventType() {
        return eventType;
    }

    public void setEventType(String eventType) {
        this.eventType = eventType;
    }

    public Object getEvent() {
        return event;
    }

    public void setEvent(Object event) {
        this.event = event;
    }

    public Object execute(Context context) {
        StatefulKnowledgeSession ksession = ((KnowledgeCommandContext) context).getStatefulKnowledgesession();
        
		if (processInstanceId == -1) {
		    ksession.signalEvent(eventType, event);
		} else {
			ProcessInstance processInstance = ksession.getProcessInstance(processInstanceId);
			if (processInstance != null) {
				processInstance.signalEvent(eventType, event);
			}
		}
		return null;
	}

	public String toString() {
		if (processInstanceId == -1) {
			return "ksession.signalEvent(" + eventType + ", " + event + ");";
		} else {
			return "ksession.signalEvent(" + processInstanceId + ", " + eventType + ", " + event + ");";
		}
	}

}