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ConfigurationBuilder.cs
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ConfigurationBuilder.cs
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// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System;
using System.Collections.Generic;
namespace Microsoft.Extensions.Configuration
{
/// <summary>
/// Used to build key/value based configuration settings for use in an application.
/// </summary>
public class ConfigurationBuilder : IConfigurationBuilder
{
/// <summary>
/// Returns the sources used to obtain configuration values.
/// </summary>
public IList<IConfigurationSource> Sources { get; } = new List<IConfigurationSource>();
/// <summary>
/// Gets a key/value collection that can be used to share data between the <see cref="IConfigurationBuilder"/>
/// and the registered <see cref="IConfigurationProvider"/>s.
/// </summary>
public IDictionary<string, object> Properties { get; } = new Dictionary<string, object>();
/// <summary>
/// Adds a new configuration source.
/// </summary>
/// <param name="source">The configuration source to add.</param>
/// <returns>The same <see cref="IConfigurationBuilder"/>.</returns>
public IConfigurationBuilder Add(IConfigurationSource source)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
Sources.Add(source);
return this;
}
/// <summary>
/// Builds an <see cref="IConfiguration"/> with keys and values from the set of providers registered in
/// <see cref="Sources"/>.
/// </summary>
/// <returns>An <see cref="IConfigurationRoot"/> with keys and values from the registered providers.</returns>
public IConfigurationRoot Build()
{
var providers = new List<IConfigurationProvider>();
foreach (var source in Sources)
{
var provider = source.Build(this);
providers.Add(provider);
}
return new ConfigurationRoot(providers);
}
}
}