/// <summary>
/// Allows an <see cref="PropertyInfoElement"/> to be visited.
/// This method is called when the element accepts this visitor
/// instance.
/// </summary>
/// <param name="propertyInfoElement">
/// The <see cref="PropertyInfoElement"/> being visited.
/// </param>
/// <returns>
/// A <see cref="IReflectionVisitor{T}" /> instance which can be used
/// to continue the visiting process with potentially updated
/// observations.
/// </returns>
/// <remarks>
/// <para>
/// This implementation relays the two <see cref="MethodInfoElement"/> instances
/// from the getter and setter of the <see cref="PropertyInfoElement"/> parameter,
/// to <see cref="Visit(MethodInfoElement)"/>,
/// but since the method is virtual, child classes can override it.
/// </para>
/// </remarks>
public virtual IReflectionVisitor <T> Visit(
PropertyInfoElement propertyInfoElement)
{
if (propertyInfoElement == null)
{
throw new ArgumentNullException("propertyInfoElement");
}
var getMethodInfoElement = propertyInfoElement.GetGetMethodInfoElement();
var setMethodInfoElement = propertyInfoElement.GetSetMethodInfoElement();
IReflectionVisitor <T> visitor = this;
if (getMethodInfoElement != null)
{
visitor = visitor.Visit(getMethodInfoElement);
}
if (setMethodInfoElement != null)
{
visitor = visitor.Visit(setMethodInfoElement);
}
return(visitor);
}
private bool IsIncompatibleWith(PropertyInfoElement propertyInfoElement)
{
return(!propertyInfoElement
.PropertyInfo
.DeclaringType
.IsInstanceOfType(this.target));
}
private string CreateIncompatibilityMessageFor(
PropertyInfoElement propertyInfoElement)
{
return(string.Format(
CultureInfo.CurrentCulture,
"Property '{0}' defined on type '{1}' is not a property on the target object, which is of type '{2}'.",
propertyInfoElement.PropertyInfo.Name,
propertyInfoElement.PropertyInfo.DeclaringType,
this.target.GetType()));
}
/// <summary>
/// Visits the <see cref="FieldInfoElement"/> and collects the value for this
/// field from the <see cref="Target"/> instance.
/// </summary>
/// <param name="propertyInfoElement">
/// The <see cref="PropertyInfoElement"/> being visited.
/// </param>
/// <returns>
/// A <see cref="IReflectionVisitor{T}" /> instance which can be used
/// to continue the visiting process with potentially updated
/// observations.
/// </returns>
public override IReflectionVisitor <IEnumerable <object> > Visit(
PropertyInfoElement propertyInfoElement)
{
if (propertyInfoElement == null)
{
throw new ArgumentNullException("propertyInfoElement");
}
if (this.IsIncompatibleWith(propertyInfoElement))
{
throw new ArgumentException(
this.CreateIncompatibilityMessageFor(propertyInfoElement),
"propertyInfoElement");
}
var value =
propertyInfoElement.PropertyInfo.GetValue(this.target, null);
return(new ValueCollectingVisitor(
this.target,
this.values.Concat(new[] { value }).ToArray()));
}