/// <summary>
/// Create a builder for a new <see cref="IMessage"/> instance pre-populated with
/// all of the _headers copied from the provided message. The _payload will
/// also be taken from the provided message.
/// </summary>
/// <param name="message">the Message from which the payload and all headers will be copied</param>
/// <returns>a MessageBuilder containing the payload and the headers from <paramref name="message"/></returns>
public static MessageBuilder FromMessage(IMessage message)
{
AssertUtils.ArgumentNotNull(message, "message must not be null");
MessageBuilder builder = new MessageBuilder(message.Payload, message);
return builder;
}
/// <summary>
/// Create a builder for a new <see cref="IMessage"/> instance with the provided payload.
/// </summary>
/// <param name="payload">the payload for the new message</param>
/// <returns>a MessageBuilder containing the payload from <paramref name="payload"/></returns>
public static MessageBuilder WithPayload(object payload)
{
MessageBuilder builder = new MessageBuilder(payload, null);
return builder;
}
public IMessage ToMessage(object obj)
{
object[] parameters = obj as object[];
if (parameters == null)
{
throw new ArgumentNullException("parameters must not be null");
}
if (parameters.Length == 0)
{
throw new ArgumentException("Paramter ArrayUtils is required");
}
if (parameters.Length != _method.GetParameters().Length)
{
throw new ArgumentException("wrong number of parameters: expected " + _method.GetParameters().Length + ", received " + parameters.Length);
}
IMessage message = null;
object payload = null;
IDictionary <string, object> headers = new Dictionary <string, object>();
for (int i = 0; i < parameters.Length; ++i)
{
object value = parameters[i];
MethodParameterMetadata metadata = _parameterMetadata[i];
if (metadata.HeaderAttr != null)
{
if (value != null)
{
headers.Add(metadata.HeaderName, value);
}
else
{
if (metadata.HeaderAttr.Required)
{
throw new ArgumentException("header '" + _parameterMetadata[i].HeaderName + "' is required");
}
}
}
else if (metadata.HasHeadersAnnotation)
{
if (value != null)
{
AddHeadersAnnotatedParameterToMap(value, headers);
}
}
else if (typeof(IMessage).IsAssignableFrom(metadata.ParameterType))
{
message = (IMessage)value;
}
else
{
if (value == null)
{
throw new ArgumentException("payload object must not be null");
}
payload = value;
}
}
if (message != null)
{
if (headers.Count == 0)
{
return(message);
}
return(MessageBuilder.FromMessage(message).CopyHeadersIfAbsent(headers).Build());
}
if (payload == null)
{
throw new ArgumentException("no parameter available for Message or payload");
}
return(MessageBuilder.WithPayload(payload).CopyHeaders(headers).Build());
}
