/// <summary>
/// Generate the proxy type.
/// </summary>
/// <param name="proxyType">The interface the proxy type must implement.</param>
/// <param name="proxyTargetType">The target type to receive the proxied calls.</param>
/// <param name="proxyOptions">The proxy generation options.</param>
/// <returns>A <see cref="Type"/> representing the proxy type.</returns>
private Type GenerateProxyType(
Type proxyType,
Type proxyTargetType,
ProxyOptions proxyOptions = null)
{
return(this.GenerateProxyType(proxyType, proxyTargetType, null, null, proxyOptions));
}
/// <summary>
/// Generate the proxy instance.
/// </summary>
/// <param name="proxyType">The proxy type.</param>
/// <param name="implementation">The proxy implementation.</param>
/// <param name="action">Optional proxy builder action.</param>
/// <param name="proxyOptions">Optional proxy options.</param>
/// <returns>An instance of the proxy type.</returns>
public object CreateProxy(Type proxyType, IProxy implementation, Action <IProxyBuilderContext> action = null, ProxyOptions proxyOptions = null)
{
return(this.CreateProxy(proxyType, null, implementation, action, proxyOptions));
}
/// <summary>
/// Generate the proxy type.
/// </summary>
/// <param name="proxyType">The interface the proxy type must implement.</param>
/// <param name="proxyTargetType">The target type to receive the proxied calls.</param>
/// <param name="proxyBaseType">The base type.</param>
/// <param name="action">An action to allow build type injection.</param>
/// <param name="proxyOptions">The proxy generation options.</param>
/// <returns>A <see cref="Type"/> representing the proxy type.</returns>
private Type GenerateProxyType(
Type proxyType,
Type proxyTargetType,
Type proxyBaseType,
Action <IProxyBuilderContext> action,
ProxyOptions proxyOptions = null)
{
if (proxyBaseType?.IsInterface == true)
{
throw new ArgumentException("Argument cannot be an interface", "proxyBaseType");
}
if (proxyType.IsInterface == false &&
proxyType != proxyBaseType)
{
throw new ArgumentException("Argument is not an interface", "proxyType");
}
if (typeof(IProxy).IsAssignableFrom(proxyTargetType) == false)
{
throw new ArgumentException("Argument does not implement <IProxy>", "proxiedType");
}
var typeName = proxyOptions?.TypeName ?? TypeName(proxyType, proxyTargetType);
var typeBuilder = TypeFactory
.Default
.NewType(typeName)
.Public()
.Implements(typeof(IProxiedObject));
if (proxyType.IsInterface == true)
{
typeBuilder.Implements(proxyType);
}
if (proxyBaseType != null)
{
typeBuilder.InheritsFrom(proxyBaseType);
}
var targetField = typeBuilder
.NewField <IProxy>("target")
.Private();
var context = new ProxyBuilderContext(
typeBuilder,
proxyType,
proxyTargetType,
targetField,
null);
action?.Invoke(context);
if (proxyType.IsInterface == true)
{
this.ImplementInterfaces(context, context.NewType);
}
this.EmitConstructor(context);
this.EmitIProxiedObjectInterface(context);
return(context
.TypeBuilder
.CreateType());
}
/// <summary>
/// Generate the proxy instance.
/// </summary>
/// <param name="proxyType">The proxy type.</param>
/// <param name="proxyBaseType">The proxy base type.</param>
/// <param name="implementation">The proxy implementation.</param>
/// <param name="action">Optional proxy builder action.</param>
/// <param name="proxyOptions">Optional proxy options.</param>
/// <returns>An instance of the proxy type.</returns>
public object CreateProxy(Type proxyType, Type proxyBaseType, IProxy implementation, Action <IProxyBuilderContext> action = null, ProxyOptions proxyOptions = null)
{
Utility.ThrowIfArgumentNull(implementation, nameof(implementation));
var typeName = proxyOptions?.TypeName ?? TypeName(proxyType, typeof(IProxy));
Type proxy = TypeFactory
.Default
.GetType(
typeName,
true);
if (proxy == null)
{
proxy = this.GenerateProxyType(proxyType, typeof(IProxy), proxyBaseType, action, proxyOptions);
}
return(Activator.CreateInstance(proxy, implementation));
}
