/// <summary>
/// Retrieves the value for the specified object instance.
/// </summary>
public override object GetValue(object instance)
{
object dynamicValue;
if (this.TryGetValueFromDynamic(instance, out dynamicValue))
{
return(dynamicValue);
}
if (instance == null)
{
throw new ArgumentNullException(nameof(instance));
}
if (string.IsNullOrEmpty(this.propertyName))
{
throw new ArgumentException("PropertyName not specified.");
}
Type instanceType = instance.GetType();
if (this.getter == null || !object.ReferenceEquals(this.getterInstanceType, instanceType))
{
this.getter = DynamicHelper.CreatePropertyValueGetter(instanceType, this.propertyName);
this.getterInstanceType = instanceType;
}
return(this.getter(instance));
}
private Type ResolveType(object context)
{
// TypePath property is with highest priority
if (!string.IsNullOrEmpty(this.typePathCache))
{
if (this.typeGetter == null)
{
this.typeGetter = DynamicHelper.CreatePropertyValueGetter(context.GetType(), this.typePathCache);
}
Type type = this.typeGetter(context) as Type;
if (type == null)
{
throw new ArgumentException("TypePath property should point to a valid Type property.");
}
return(type);
}
// Next is the Style.TargetType (if Style is specified)
Style style = this.Style;
if (style != null)
{
return(style.TargetType);
}
// Last is the DefaultType
return(this.DefaultType);
}
private void ResetFilterKeyGetter(object item)
{
this.filterKeyGetter = DynamicHelper.CreatePropertyValueGetter(item.GetType(), this.filterMemberPath);
if (this.filterKeyGetter == null)
{
Debug.Assert(false, "Invalid FilterMemberPath defined.");
}
}
private string GetLegendTitle(object context)
{
if (string.IsNullOrEmpty(this.LegendTitlePath))
{
return(string.Empty);
}
if (this.legendTitleGetter == null)
{
this.legendTitleGetter = DynamicHelper.CreatePropertyValueGetter(context.GetType(), this.legendTitlePathCache);
}
return(this.legendTitleGetter(context) as string);
}
