BaseAttribute.cs

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// Copyright 2005-2015 Giacomo Stelluti Scala & Contributors. All rights reserved. See License.md in the project root for license information.
 
using System;
 
using CommandLine.Infrastructure;
 
namespace CommandLine
{
    public abstract class BaseAttribute : Attribute
    {
        private readonly LocalizableAttributeProperty helpText;
        private int max;
        private string metaValue;
        private int min;
        private Type resourceType;
 
        protected internal BaseAttribute()
        {
            min = -1;
            max = -1;
            helpText = new LocalizableAttributeProperty(nameof(HelpText));
            metaValue = string.Empty;
            resourceType = null;
        }
 
        public bool Required { get; set; }
 
        public int Min
        {
            get => min;
            set
            {
                if (value < 0)
                {
                    throw new ArgumentNullException("value");
                }
 
                min = value;
            }
        }
 
        public int Max
        {
            get => max;
            set
            {
                if (value < 0)
                {
                    throw new ArgumentNullException("value");
                }
 
                max = value;
            }
        }
 
        public object Default { get; set; }
 
        public string HelpText
        {
            get => helpText.Value ?? string.Empty;
            set => helpText.Value = value ?? throw new ArgumentNullException("value");
        }
 
        public string MetaValue
        {
            get => metaValue;
            set
            {
                if (value == null)
                {
                    throw new ArgumentNullException("value");
                }
 
                metaValue = value;
            }
        }
 
        public bool Hidden { get; set; }
 
        public Type ResourceType
        {
            get => resourceType;
            set => resourceType =
                       helpText.ResourceType = value;
        }
    }
}