// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
namespace System.ServiceModel.Security
{
    public sealed class UserNamePasswordClientCredential
    {
        private string _userName;
        private string _password;
        private bool _isReadOnly;
 
        internal UserNamePasswordClientCredential()
        {
            // empty
        }
 
        internal UserNamePasswordClientCredential(UserNamePasswordClientCredential other)
        {
            _userName = other._userName;
            _password = other._password;
            _isReadOnly = other._isReadOnly;
        }
 
        public string UserName
        {
            get
            {
                return _userName;
            }
            set
            {
                ThrowIfImmutable();
                _userName = value;
            }
        }
 
        public string Password
        {
            get
            {
                return _password;
            }
            set
            {
                ThrowIfImmutable();
                _password = value;
            }
        }
 
        internal void MakeReadOnly()
        {
            _isReadOnly = true;
        }
 
        private void ThrowIfImmutable()
        {
            if (_isReadOnly)
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SRServiceModel.ObjectIsReadOnly));
            }
        }
    }
}