XmlStringConverter.cs

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namespace System.Xml.Schema;
 
internal sealed class XmlStringConverter : XmlBaseConverter
{
    private XmlStringConverter(XmlSchemaType schemaType)
        : base(schemaType)
    {
    }
 
    public static XmlValueConverter Create(XmlSchemaType schemaType)
    {
        return new XmlStringConverter(schemaType);
    }
 
    public override string ToString(object value, IXmlNamespaceResolver nsResolver)
    {
        if (value == null)
        {
            throw new ArgumentNullException("value");
        }
        Type type = value.GetType();
        if (type == XmlBaseConverter.StringType)
        {
            return (string)value;
        }
        if (type == XmlBaseConverter.XmlAtomicValueType)
        {
            return ((XmlAtomicValue)value).Value;
        }
        return (string)ChangeListType(value, XmlBaseConverter.StringType, nsResolver);
    }
 
    public override object ChangeType(string value, Type destinationType, IXmlNamespaceResolver nsResolver)
    {
        if (value == null)
        {
            throw new ArgumentNullException("value");
        }
        if (destinationType == null)
        {
            throw new ArgumentNullException("destinationType");
        }
        if (destinationType == XmlBaseConverter.ObjectType)
        {
            destinationType = base.DefaultClrType;
        }
        if (destinationType == XmlBaseConverter.StringType)
        {
            return value;
        }
        if (destinationType == XmlBaseConverter.XmlAtomicValueType)
        {
            return new XmlAtomicValue(base.SchemaType, value);
        }
        if (destinationType == XmlBaseConverter.XPathItemType)
        {
            return new XmlAtomicValue(base.SchemaType, value);
        }
        return ChangeListType(value, destinationType, nsResolver);
    }
 
    public override object ChangeType(object value, Type destinationType, IXmlNamespaceResolver nsResolver)
    {
        if (value == null)
        {
            throw new ArgumentNullException("value");
        }
        if (destinationType == null)
        {
            throw new ArgumentNullException("destinationType");
        }
        Type type = value.GetType();
        if (destinationType == XmlBaseConverter.ObjectType)
        {
            destinationType = base.DefaultClrType;
        }
        if (destinationType == XmlBaseConverter.StringType)
        {
            return ToString(value, nsResolver);
        }
        if (destinationType == XmlBaseConverter.XmlAtomicValueType)
        {
            if (type == XmlBaseConverter.StringType)
            {
                return new XmlAtomicValue(base.SchemaType, (string)value);
            }
            if (type == XmlBaseConverter.XmlAtomicValueType)
            {
                return (XmlAtomicValue)value;
            }
        }
        if (destinationType == XmlBaseConverter.XPathItemType)
        {
            if (type == XmlBaseConverter.StringType)
            {
                return new XmlAtomicValue(base.SchemaType, (string)value);
            }
            if (type == XmlBaseConverter.XmlAtomicValueType)
            {
                return (XmlAtomicValue)value;
            }
        }
        return ChangeListType(value, destinationType, nsResolver);
    }
}