/// <summary>
/// Gets the stored information for a class and property.
/// Not only the class is examined, but also all superclasses and implemented interfaces.
/// </summary>
/// <param name="targetClass">The object about which information will be retrieved</param>
/// <param name="property">The property in the class</param>
/// <param name="subject">The type of information required</param>
/// <param name="defaultValue">Default value if the information is not found</param>
/// <returns>The information stored for this class, property and type, the default value if not found</returns>
public static object GetAttributeDefault(Type targetClass, string property, string subject, object defaultValue)
{
// try to find appropriate value in super class
Type targetType = targetClass;
while (targetType != null)
{
string target = targetType.FullName;
MetaInfoEntry table = MetaInfo.GetEntry(target);
if (table != null)
{
if (table.Contains(property, subject))
{
return(table.GetValue(property, subject));
}
}
targetType = targetType.BaseType;
}
// try to find an interface implemented by the target type
foreach (Type implementedInterface in targetClass.GetInterfaces())
{
object attribute = MetaInfo.GetAttributeDefault(implementedInterface, property, subject, null);
if (attribute != null)
{
return(attribute);
}
}
return(defaultValue);
}
/// <summary>
/// Gets all metainfo concerning a given class and creates an empty block if not found
/// </summary>
/// <param name="target">The class name</param>
/// <returns>All metainfo about a class</returns>
private static MetaInfoEntry GetEntryForced(string target)
{
MetaInfoEntry entry = MetaInfo.GetEntry(target);
if (entry == null)
{
entry = new MetaInfoEntry(target);
_targets.Add(entry);
}
return(entry);
}
/// <summary>
/// Gets the stored information for a string
/// </summary>
/// <param name="target">The string about which information will be retrieved</param>
/// <param name="subject">The type of information required</param>
/// <param name="defaultValue">Default value if the information is not found</param>
/// <returns>The information stored for this class, property and type, the default value if not found</returns>
public static object GetAttributeDefault(string target, string subject, object defaultValue)
{
MetaInfoEntry table = MetaInfo.GetEntry(target);
if (table != null)
{
if (table.Contains(null, subject))
{
return(table.GetValue(null, subject));
}
}
return(defaultValue);
}
/// <summary>
/// Stores information about a class and property
/// </summary>
/// <param name="target">The class about which information is stored (usually as class type or string)</param>
/// <param name="property">The property in the class</param>
/// <param name="subject">The type of information (e.g. how the property is named in an xml file)</param>
/// <param name="targetValue">The actual value</param>
public static void SetAttribute(object target, string property, string subject, object targetValue)
{
if (target is Type)
{
target = ((Type)target).FullName;
}
else if (target is Assembly)
{
target = ((Assembly)target).GetName().Name;
}
MetaInfoEntry table = MetaInfo.GetEntryForced(target.ToString());
table.SetValue(property, subject, targetValue);
}
/// <summary>
/// Gets a list of all properties in a class, for which a value has been stored.
/// All superclasses and implemented interfaces of the class are examined too.
/// </summary>
/// <param name="targetClass">The class</param>
/// <returns>List of properties</returns>
public static string[] GetProperties(Type targetClass)
{
// try to find appropriate value in super class
ArrayList subjects = new ArrayList();
Type targetType = targetClass;
while (targetType != null)
{
string fullName = targetType.FullName;
MetaInfoEntry entry = MetaInfo.GetEntry(fullName);
if (entry != null)
{
foreach (MetaInfoClass property in entry.Properties)
{
if (!subjects.Contains(property.Name))
{
subjects.Add(property.Name);
}
}
}
targetType = targetType.BaseType;
}
// try to find interfaces implemented by the target type
foreach (Type implementedInterface in targetClass.GetInterfaces())
{
string[] interfaceProperties = MetaInfo.GetProperties(implementedInterface);
foreach (string interfaceProperty in interfaceProperties)
{
if (!subjects.Contains(interfaceProperty))
{
subjects.Add(interfaceProperty);
}
}
}
return((string[])subjects.ToArray(typeof(string)));
}
/// <summary>
/// Gets all metainfo concerning a given class and creates an empty block if not found
/// </summary>
/// <param name="target">The class name</param>
/// <returns>All metainfo about a class</returns>
private static MetaInfoEntry GetEntryForced (string target)
{
MetaInfoEntry entry = MetaInfo.GetEntry (target);
if (entry == null)
{
entry = new MetaInfoEntry (target);
_targets.Add (entry);
}
return entry;
}
