private static SDataParameters GetServiceParameters(ISDataClient client, Expression bodyExpr, string path)
{
Guard.ArgumentNotNull(client, "client");
var callExpr = bodyExpr as MethodCallExpression;
if (callExpr == null)
{
throw new SDataClientException("Expression must be a method call");
}
var attr = callExpr.Method.GetCustomAttribute <SDataServiceOperationAttribute>();
var namingScheme = client.NamingScheme ?? NamingScheme.Default;
var request = new SDataResource();
var instance = callExpr.Object != null?Expression.Lambda(callExpr.Object).Compile().DynamicInvoke() : null;
if (path == null)
{
path = SDataPathAttribute.GetPath(instance != null ? instance.GetType() : callExpr.Method.DeclaringType);
}
if (instance != null)
{
if (attr == null || attr.PassInstanceBy == InstancePassingConvention.Selector ||
(attr.PassInstanceBy == InstancePassingConvention.Default && string.IsNullOrEmpty(attr.InstancePropertyName)))
{
if (path == null)
{
throw new SDataClientException("Path must be specified when passing instance context by selector");
}
var key = ContentHelper.GetProtocolValue <string>(instance, SDataProtocolProperty.Key);
if (string.IsNullOrEmpty(key))
{
throw new SDataClientException("Unable to extract resource key from instance");
}
path += string.Format("({0})", SDataUri.FormatConstant(key));
}
else if (attr.PassInstanceBy == InstancePassingConvention.Default)
{
var key = ContentHelper.GetProtocolValue <string>(instance, SDataProtocolProperty.Key);
request[attr.InstancePropertyName] = !string.IsNullOrEmpty(key) ? key : instance;
}
else
{
if (string.IsNullOrEmpty(attr.InstancePropertyName))
{
throw new SDataClientException("Instance property name must be specified when passing instance context by key property or object property");
}
if (attr.PassInstanceBy == InstancePassingConvention.KeyProperty)
{
var key = ContentHelper.GetProtocolValue <string>(instance, SDataProtocolProperty.Key);
if (string.IsNullOrEmpty(key))
{
throw new SDataClientException("Unable to extract resource key from instance");
}
request[attr.InstancePropertyName] = key;
}
else if (attr.PassInstanceBy == InstancePassingConvention.ObjectProperty)
{
request[attr.InstancePropertyName] = instance;
}
}
}
if (path != null)
{
path += "/";
}
path += "$service/" + namingScheme.GetName(callExpr.Method);
foreach (var pair in callExpr.Method.GetParameters().Zip(callExpr.Arguments, (param, arg) => new { param, arg }))
{
request[namingScheme.GetName(pair.param)] = Expression.Lambda(pair.arg).Compile().DynamicInvoke();
}
var xmlLocalName = attr != null ? attr.XmlLocalName : null;
var xmlNamespace = attr != null ? attr.XmlNamespace : null;
var content = new SDataResource(xmlLocalName, xmlNamespace)
{
{ "request", request }
};
return(new SDataParameters
{
Method = HttpMethod.Post,
Path = path,
Content = content
});
}
private static string GetPath <T>(string path)
{
return(path ?? SDataPathAttribute.GetPath(typeof(T)));
}