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/*
 * $Id: ExceptionMessage.java 22439 2011-07-18 19:06:39Z dfeist $
 * --------------------------------------------------------------------------------------
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 *
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */

package org.mule.message;

import org.mule.api.MuleEvent;
import org.mule.api.transport.PropertyScope;

import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.net.URI;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * ExceptionMessage is used by the DefaultServiceExceptionStrategy
 * for wrapping an exception with a message to send via an endpointUri.
 */
public class ExceptionMessage implements Serializable
{
    /**
     * Serial version
     */
    private static final long serialVersionUID = -538516243574950621L;

    private static final Log logger = LogFactory.getLog(ExceptionMessage.class);

    // This object uses custom serialization via the writeObject() method
    private transient Object payload;
    // This object uses custom serialization via the writeObject() method
    private transient Throwable exception;

    protected Map properties;
    private String componentName;
    private String endpointUri;
    private Date timeStamp;

    public ExceptionMessage(MuleEvent event,
                            Throwable exception,
                            String componentName,
                            URI endpointUri)
    {
        this.payload = event.getMessage().getPayload();
        properties = new HashMap();
        this.exception = exception;
        timeStamp = new Date();
        this.componentName = componentName;
        if (endpointUri != null)
        {
            this.endpointUri = endpointUri.toString();
        }

        for (Iterator iterator = event.getMessage().getPropertyNames(PropertyScope.OUTBOUND).iterator(); iterator.hasNext();)
        {
            String propertyKey = (String) iterator.next();
            setProperty(propertyKey, event.getMessage().getProperty(propertyKey, PropertyScope.OUTBOUND));
        }
    }

    private void writeObject(ObjectOutputStream out) throws IOException
    {
        out.defaultWriteObject();
        try
        {
            out.writeObject(exception);
        }
        catch (NotSerializableException e)
        {
            logger.warn("Exception " + exception.getClass().getName() + " is not serializable and will be lost when sending ExceptionMessage over the wire: " + e.getMessage());
        }
        try
        {
            out.writeObject(payload);
        }
        catch (NotSerializableException e)
        {
            logger.warn("Payload " + payload.getClass().getName() + " is not serializable and will be lost when sending ExceptionMessage over the wire: " + e.getMessage());
        }
    }

    private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
    {
        in.defaultReadObject();
        try
        {
            exception = (Throwable) in.readObject();
        }
        catch (Exception e)
        {
            // ignore
        }
        try
        {
            payload = in.readObject();
        }
        catch (Exception e)
        {
            // ignore
        }
    }

    public void setPayload(Object payload)
    {
        this.payload = payload;
    }

    /**
     * @return the current message
     */
    public Object getPayload()
    {
        return payload;
    }


    /**
     * Adds a map of properties to associated with this message
     *
     * @param properties the properties add to this message
     */
    public void addProperties(Map properties)
    {
        this.properties.putAll(properties);
    }

    /**
     * Removes all properties on this message
     */
    public void clearProperties()
    {
        properties.clear();
    }

    /**
     * Returns a map of all properties on this message
     *
     * @return a map of all properties on this message
     */
    public Map getProperties()
    {
        return properties;
    }

    public void setProperty(String key, Object value)
    {
        properties.put(key, value);
    }

    public Object getProperty(String key)
    {
        return properties.get(key);
    }

    public String getComponentName()
    {
        return componentName;
    }

    public String getEndpoint()
    {
        return endpointUri;
    }

    public Date getTimeStamp()
    {
        return timeStamp;
    }

    public Throwable getException()
    {
        return exception;
    }

    @Override
    public String toString()
    {
        return "ExceptionMessage{" + "payload=" + getPayload() + ", context=" + properties + "exception=" + exception
                + ", componentName='" + componentName + "'" + ", endpointUri=" + endpointUri + ", timeStamp="
                + timeStamp + "}";
    }
}