/// <param name="pinfo">info of property to work with</param>
/// <param name="config">configuration containing the instance to set to</param>
public PropertyRequirement(PropertyInfo pinfo, IRequiresConfiguration config)
{
this.propertyInfo = pinfo;
this.configuration = config;
this.type = pinfo.PropertyType.FullName;
this.name = pinfo.Name;
this.valueTypesOnly = pinfo.PropertyType.IsValueType;
this.hard = false;
foreach (Attribute attr in pinfo.GetCustomAttributes(true))
{
if (attr is RequiredAttribute)
{
this.hard = true;
}
if (attr is DefaultClassAttribute)
{
this.defaultValue = new ProviderValue(
new ConfiguredComponent((attr as DefaultClassAttribute).ClassName));
}
if (attr is DefaultNameAttribute)
{
this.defaultValue = new ComponentRef("${" + (attr as DefaultNameAttribute).ComponentName + "}");
}
}
}
/// <summary>
/// Constructs from a type name and component name
/// </summary>
public ConfiguredComponent(string typeName, string componentName)
{
this.typeName = typeName;
this.requiredConfiguration = new TypeRequiredConfiguration(typeName);
this.configuration = new StandardConfiguration();
this.matchedName = componentName;
}
private static object ConfigureComponentWithRequirements(
IRequiresConfiguration requiredConfiguration,
IComponentConfiguration configuration,
IComponentDirectory componentDirectory)
{
// 3. fill in the other parameters from the component directory
foreach (IRequirement req in requiredConfiguration.Requirements)
{
// Console.Out.WriteLine(">> Requirement: {0}", req.Name);
if (configuration.Values.ContainsKey(req.Name))
{
// Console.Out.WriteLine(" ... Contains Key");
req.SetValue(configuration.Values[req.Name].GetInstance(req.Type));
}
else
{
if (req.Default != null)
{
// Console.Out.WriteLine(" ... Has Default");
// NEW CONFIGURED COMPONENT THAT IS
req.SetValue(
componentDirectory.ConfigureInlineComponent(
new Instance(
req.Default.GetInstance(req.Type))));
}
else if (HasComponent(componentDirectory, req.Type))
{
// Console.Out.WriteLine(" ... Setting By ICD");
req.SetValue(componentDirectory.GetInstanceByType(req.Type));
}
else if (req.Hard)
{
throw new ComponentConfigurationException(
null,
String.Format("ComponentOS KERNEL PANIC! I have no value for: {0}", req.Name));
}
}
}
if (requiredConfiguration.Instance is IComponentPostInitialization)
{
(requiredConfiguration.Instance as IComponentPostInitialization).PostComponentInit(componentDirectory);
}
return(requiredConfiguration.Instance);
}
public override object GetInstance(
IComponentDirectory componentDirectory,
object clientInstance,
string requirementName,
string requirementType)
{
IRequiresConfiguration old = this.requiredConfiguration;
try
{
requiredConfiguration = requiredConfiguration.Clone();
return(base.GetInstance(componentDirectory, clientInstance, requirementName, requirementType));
}
finally
{
requiredConfiguration = old;
}
}
/// <summary>
/// Constructs from XML
/// </summary>
/// <param name="typeName"></param>
public ConfiguredComponent(XmlNode node)
{
string typeName = (node as XmlElement).GetAttribute("Type");
this.typeName = typeName;
this.matchedName = (node as XmlElement).GetAttribute("Id");
this.configuration = new StandardConfiguration(node["Parameters"]);
this.requiredConfiguration = new TypeRequiredConfiguration(typeName);
XmlElement element = node as XmlElement;
if (element.HasAttribute("MatchAgainstType"))
{
this.matchAgainstType = Boolean.Parse(element.GetAttribute("MatchAgainstType"));
}
if (element.HasAttribute("MatchAgainstName"))
{
this.matchAgainstName = Boolean.Parse(element.GetAttribute("MatchAgainstName"));
}
}
public void Preinitialize(IRequiresConfiguration config)
{
// call the constructor, get the instance
bool found = false;
foreach (IRequiresConfiguration cfg in preinitializers)
{
if (cfg == config)
{
found = true; break;
}
}
if (!found || !(config is ConstructorConfiguration))
{
throw new Exception("Preinitializer does not belong to this instance");
}
instance = config.Instance;
}
public virtual object GetInstance(
IComponentDirectory componentDirectory,
object clientInstance,
string requirementName,
string requirementType)
{
ComponentDirectory = componentDirectory;
{
object instance = requiredConfiguration.Instance;
if (instance != null)
{
return(instance);
}
}
// 1. compute the best pre-initializer to use
int currentScore = 0;
int maxScore = Int32.MinValue;
IRequiresConfiguration currentInitializer = null;
foreach (IRequiresConfiguration initializer in requiredConfiguration.PreInitializers)
{
// Console.Out.WriteLine("Initializer...");
currentScore = 0;
bool canUse = true;
foreach (IRequirement req in initializer.Requirements)
{
if (req.Default == null)
{
/* find the value */
if (configuration.Values.ContainsKey(req.Name))
{
currentScore++;
}
else if (HasComponent(componentDirectory, req.Type))
{
currentScore++;
}
else if (req.Hard)
{
/* DEBUG: Console.Out.WriteLine("Missing Parameter: {0} {1}", req.Type, req.Name); */
if (req.Hard)
{
canUse = false; break;
}
}
else
{
currentScore--;
}
}
}
if (canUse && (currentScore > maxScore))
{
currentInitializer = initializer;
maxScore = currentScore;
}
}
// 1.1 give up if no pre-initializer can be used (because of unfulfillable hard requirements)
if (currentInitializer == null)
{
throw new ComponentConfigurationException(this, "The component cannot be instantiated; No compatible pre-initializer exists");
}
// 1.2 give up if after pre-initialization, the object cannot be used (because of unfulfillable hard requirements)
foreach (IRequirement req in requiredConfiguration.Requirements)
{
if (req.Default == null && req.Hard)
{
/* if it's been solved through a pre-initializer */
bool found = false;
foreach (IRequirement reqpre in currentInitializer.Requirements)
{
if (reqpre.Name == req.Name)
{
found = true; break;
}
}
if (!found)
{
if (!req.ValueTypesOnly)
{
// query the ICD by type
if (HasComponent(componentDirectory, req.Type))
{
continue;
}
}
throw new ComponentConfigurationException(
this,
String.Format(
"The component cannot be instantiated; After pre-initialization, the {0} requirement is not satisfied",
req.Name));
}
}
}
// 2. fill in the pre-initializer
foreach (IRequirement req in currentInitializer.Requirements)
{
// Console.Out.WriteLine(">> PreInitializer Requirement: {0}", req.Name);
if (configuration.Values.ContainsKey(req.Name))
{
// Console.Out.WriteLine(" ... Contains Key");
req.SetValue(configuration.Values[req.Name].GetInstance(req.Type));
}
else
{
if (req.Default != null)
{
// Console.Out.WriteLine(" ... Has Default");
req.SetValue(
componentDirectory.ConfigureInlineComponent(
new Instance(
req.Default.GetInstance(req.Type))));
}
else if (HasComponent(componentDirectory, req.Type))
{
// Console.Out.WriteLine(" ... Setting By ICD (type={0})", req.Type);
req.SetValue(componentDirectory.GetInstanceByType(req.Type));
}
else if (req.Hard)
{
throw new ComponentConfigurationException(
this,
String.Format("ComponentOS KERNEL PANIC! I have no value for: {0}", req.Name));
}
}
}
requiredConfiguration.Preinitialize(currentInitializer);
return(ConfigureComponentWithRequirements(requiredConfiguration, configuration, componentDirectory));
}
/// <summary>
/// Creates a new configured component from required configuration and provided configuration
/// </summary>
public ConfiguredComponent(IRequiresConfiguration configRequired, IComponentConfiguration configProvided)
{
this.matchedTypes = new string[0];
this.requiredConfiguration = configRequired;
this.configuration = configProvided;
}
/// <summary>
/// Constructs from required configuration
/// </summary>
public ConfiguredComponent(IRequiresConfiguration configRequired)
{
this.matchedTypes = new string[0];
this.requiredConfiguration = configRequired;
this.configuration = new StandardConfiguration();
}
/// <summary>
/// Constructs from a type name and a provided configuration
/// </summary>
public ConfiguredComponent(string typeName, IComponentConfiguration configProvided)
{
this.typeName = typeName;
this.configuration = configProvided;
this.requiredConfiguration = new TypeRequiredConfiguration(typeName);
}
public void Preinitialize(IRequiresConfiguration config)
{
throw new Exception("The method or operation is not implemented.");
}
/// <summary>
/// Creates a new configured component from required configuration and provided configuration
/// </summary>
public AlwaysNewConfiguredComponent(IRequiresConfiguration configRequired, IComponentConfiguration configProvided) : base(configRequired, configProvided)
{
}