MetadataPropertyDescriptorWrapper.cs

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namespace System.ComponentModel.DataAnnotations;
 
internal sealed class MetadataPropertyDescriptorWrapper : PropertyDescriptor
{
    private readonly PropertyDescriptor _descriptor;
 
    private readonly bool _isReadOnly;
 
    public override Type ComponentType => _descriptor.ComponentType;
 
    public override bool IsReadOnly
    {
        get
        {
            if (!_isReadOnly)
            {
                return _descriptor.IsReadOnly;
            }
            return true;
        }
    }
 
    public override Type PropertyType => _descriptor.PropertyType;
 
    public override bool SupportsChangeEvents => _descriptor.SupportsChangeEvents;
 
    public MetadataPropertyDescriptorWrapper(PropertyDescriptor descriptor, Attribute[] newAttributes)
        : base(descriptor, newAttributes)
    {
        _descriptor = descriptor;
        foreach (Attribute attribute in newAttributes)
        {
            if (attribute is ReadOnlyAttribute readOnlyAttribute)
            {
                _isReadOnly = readOnlyAttribute.IsReadOnly;
                break;
            }
        }
    }
 
    public override void AddValueChanged(object component, EventHandler handler)
    {
        _descriptor.AddValueChanged(component, handler);
    }
 
    public override bool CanResetValue(object component)
    {
        return _descriptor.CanResetValue(component);
    }
 
    public override object GetValue(object component)
    {
        return _descriptor.GetValue(component);
    }
 
    public override void RemoveValueChanged(object component, EventHandler handler)
    {
        _descriptor.RemoveValueChanged(component, handler);
    }
 
    public override void ResetValue(object component)
    {
        _descriptor.ResetValue(component);
    }
 
    public override void SetValue(object component, object value)
    {
        _descriptor.SetValue(component, value);
    }
 
    public override bool ShouldSerializeValue(object component)
    {
        return _descriptor.ShouldSerializeValue(component);
    }
}