//static Object GetNestedContextIfAny( Object context, String path )
//{
// var segements = path.Split( new[] { '.' }, StringSplitOptions.RemoveEmptyEntries );
// if ( context != null && segements.Length > 1 )
// {
// }
// return context;
//}
/// <summary>
/// Tries to generate command data.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="dataContext">The data context.</param>
/// <param name="data">The data.</param>
/// <returns></returns>
public virtual Boolean TryGenerateCommandData( PropertyPath path, Object dataContext, out CommandData data )
{
var propertyPath = path.Path;
var nestedProperties = propertyPath
.Split(new[] { '.' }, StringSplitOptions.RemoveEmptyEntries);
var propertyLevel = 0;
while (dataContext != null && propertyLevel < nestedProperties.Length-1)
{
var currentProperty = nestedProperties[propertyLevel];
var dataContextType = dataContext.GetType();
var pi = dataContextType.GetProperty(currentProperty);
if (pi == null)
{
logger.Error("Cannot find any property named: {0}.", currentProperty);
dataContext = null;
break;
}
dataContext = pi.GetValue(dataContext, null);
propertyLevel++;
propertyPath = nestedProperties[propertyLevel];
}
if ( dataContext == null )
{
data = null;
return false;
}
var methodName = GetExpectedMethodName( propertyPath );
var factName = String.Concat( "Can", methodName );
var properties = dataContext.GetType().GetProperties();
var commandData = dataContext.GetType()
.GetMethods()
.Where( mi => mi.Name.Equals( methodName ) )
.Select( mi =>
{
var prms = mi.GetParameters();
return new CommandData()
{
DataContext = dataContext,
FastDelegate = mi.CreateVoidDelegate(),
Fact = properties.Where( pi =>
{
return pi.PropertyType == typeof( Fact ) && pi.Name.Equals( factName );
} )
.Select( pi =>
{
var fact = ( Fact )pi.GetValue( dataContext, null );
return fact;
} )
.SingleOrDefault(),
BooleanFact = properties.Where( pi =>
{
return dataContext is INotifyPropertyChanged
&& pi.PropertyType == typeof( Boolean )
&& pi.Name.Equals( factName );
} )
.Select( pi => new BooleanFact
{
FastGetter = dataContext.CreateFastPropertyGetter<Boolean>( pi ),
Name = pi.Name
} )
.SingleOrDefault(),
HasParameter = prms.Length == 1,
ParameterType = prms.Length != 1 ? null : prms[ 0 ].ParameterType,
KeyBindings = mi.GetAttributes<KeyBindingAttribute>(),
Description = mi.GetAttribute<CommandDescriptionAttribute>()
};
} )
.SingleOrDefault();
if ( commandData == null )
{
logger.Warning( "Cannot find any method named: {0}.", methodName );
}
data = commandData;
return commandData != null;
}
